docs: propose deprecating the global Viper instance

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>
docs: propose dropping file writing support
2024-04-21 12:31:38 +00:00 · 2021-09-23 10:07:37 +02:00 · 2021-09-22 23:10:51 +02:00 · 2021-09-16 09:04:54 +02:00 · 2021-07-20 23:54:12 +02:00 · 2021-07-14 04:02:54 +02:00
56 changed files with 2599 additions and 716 deletions
@@ -0,0 +1 @@
+docs/adr
@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.go]
+indent_style = tab
+
+[{Makefile, *.mk}]
+indent_style = tab
@@ -0,0 +1,2 @@
+[{*.yml,*.yaml}]
+indent_size = 2
@@ -0,0 +1,110 @@
+name: 🐛 Bug report
+description: Report a bug to help us improve Viper
+labels: [kind/bug]
+body:
+- type: markdown
+  attributes:
+    value: |
+      Thank you for submitting a bug report!
+
+      Please fill out the template below to make it easier to debug your problem.
+
+      If you are not sure if it is a bug or not, you can contact us via the available [support channels](https://github.com/spf13/viper/issues/new/choose).
+- type: checkboxes
+  attributes:
+    label: Preflight Checklist
+    description: Please ensure you've completed all of the following.
+    options:
+      - label: I have searched the [issue tracker](https://www.github.com/spf13/viper/issues) for an issue that matches the one I want to file, without success.
+        required: true
+      - label: I am not looking for support or already pursued the available [support channels](https://github.com/spf13/viper/issues/new/choose) without success.
+        required: true
+- type: input
+  attributes:
+    label: Version
+    description: What version of Viper are you using?
+    placeholder: 1.8.1
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: Config Source
+    description: What sources do you load configuration from?
+    options:
+      - Manual set
+      - Flags
+      - Environment variables
+      - Files
+      - Remove K/V stores
+      - Defaults
+    multiple: true
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: Format
+    description: Which file formats do you use?
+    options:
+      - JSON
+      - YAML
+      - TOML
+      - Dotenv
+      - HCL
+      - Java properties
+      - INI
+      - Other (specify below)
+    multiple: true
+- type: input
+  attributes:
+    label: Repl.it link
+    description: Complete example on Repl.it reproducing the issue. [Here](https://repl.it/@sagikazarmark/Viper-example) is an example you can use.
+    placeholder: https://repl.it/@sagikazarmark/Viper-example
+- type: textarea
+  attributes:
+    label: Code reproducing the issue
+    description: Please provide a Repl.it link if possible.
+    render: go
+    placeholder: |
+      package main
+
+      import (
+        "github.com/spf13/viper"
+      )
+
+      func main() {
+        v := viper.New()
+
+        // ...
+
+        var config Config
+
+        err = v.Unmarshal(&config)
+        if err != nil {
+          panic(err)
+        }
+      }
+- type: textarea
+  attributes:
+    label: Expected Behavior
+    description: A clear and concise description of what you expected to happen.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Actual Behavior
+    description: A clear description of what actually happens.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Steps To Reproduce
+    description: Steps to reproduce the behavior if it is not self-explanatory.
+    placeholder: |
+      1. In this environment...
+      2. With this config...
+      3. Run '...'
+      4. See error...
+- type: textarea
+  attributes:
+    label: Additional Information
+    description: Links? References? Anything that will give us more context about the issue that you are encountering!
@@ -0,0 +1,13 @@
+blank_issues_enabled: false
+contact_links:
+  - name: ❓ Ask a question
+    url: https://github.com/spf13/viper/discussions/new?category=q-a
+    about:  Ask and discuss questions with other Viper community members
+
+  - name: 📓 Reference
+    url: https://pkg.go.dev/mod/github.com/spf13/viper
+    about: Check the Go code reference
+
+  - name: 💬 Slack channel
+    url: https://gophers.slack.com/messages/viper
+    about: Please ask and answer questions here
@@ -0,0 +1,39 @@
+name: 🚀 Feature request
+description: Suggest an idea for Viper
+labels: [kind/enhancement]
+body:
+- type: markdown
+  attributes:
+    value: |
+      Thank you for submitting a feature request!
+
+      Please describe what you would like to change/add and why in detail by filling out the template below.
+
+      If you are not sure if your request fits into Viper, you can contact us via the available [support channels](https://github.com/spf13/viper/issues/new/choose).
+- type: checkboxes
+  attributes:
+    label: Preflight Checklist
+    description: Please ensure you've completed all of the following.
+    options:
+      - label: I have searched the [issue tracker](https://www.github.com/spf13/viper/issues) for an issue that matches the one I want to file, without success.
+        required: true
+- type: textarea
+  attributes:
+    label: Problem Description
+    description: A clear and concise description of the problem you are seeking to solve with this feature request.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Proposed Solution
+    description: A clear and concise description of what would you like to happen.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Alternatives Considered
+    description: A clear and concise description of any alternative solutions or features you've considered.
+- type: textarea
+  attributes:
+    label: Additional Information
+    description: Add any other context about the problem here.
@@ -0,0 +1,20 @@
+<!--
+Thank you for sending a pull request! Here some tips for contributors:
+
+1. Fill the description template below.
+2. Include appropriate tests (if necessary). Make sure that all CI checks passed.
+3. If the Pull Request is a work in progress, make use of GitHub's "Draft PR" feature and mark it as such.
+-->
+
+**Overview**:
+<!-- Describe your changes briefly here. -->
+
+**What problem does it solve?**:
+<!--
+- Please state in detail why we need this PR and what it solves.
+- If your PR closes some of the existing issues, please add links to them here.
+  Mentioned issues will be automatically closed.
+  Usage: "Closes #<issue number>", or "Closes (paste link of issue)"
+-->
+
+**Special notes for a reviewer**:
@@ -0,0 +1,16 @@
+version: 2
+
+updates:
+  - package-ecosystem: gomod
+    directory: /
+    labels:
+      - area/dependencies
+    schedule:
+      interval: daily
+
+  - package-ecosystem: github-actions
+    directory: /
+    labels:
+      - area/dependencies
+    schedule:
+      interval: daily
@@ -1,2 +0,0 @@
-[*.yml]
-indent_size = 2
@@ -9,10 +9,11 @@ on:
 jobs:
  build:
    name: Build
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
-        go: ['1.11', '1.12', '1.13']
+        os: [ubuntu-latest, macos-latest]
+        go: ['1.14', '1.15', '1.16']
    env:
      VERBOSE: 1
      GOFLAGS: -mod=readonly
@@ -20,15 +21,15 @@ jobs:

    steps:
      - name: Set up Go
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
        with:
          go-version: ${{ matrix.go }}

      - name: Checkout code
        uses: actions/checkout@v2

-      - name: Run tests
-        run: make test
-
-      - name: Run linter
+      - name: Lint
        run: make lint
+
+      - name: Test
+        run: make test
@@ -0,0 +1,32 @@
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v4
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          script: |
+            github.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: `👋 Thanks for reporting!
+
+            A maintainer will take a look at your issue shortly. 👀
+
+            In the meantime: We are working on **Viper v2** and we would love to hear your thoughts about what you like or don't like about Viper, so we can improve or fix those issues.
+
+            ⏰ If you have a couple minutes, please take some time and share your thoughts: https://forms.gle/R6faU74qPRPAzchZ9
+
+            📣 If you've already given us your feedback, you can still help by spreading the news,
+            either by sharing the above link or telling people about this on Twitter:
+
+            https://twitter.com/sagikazarmark/status/1306904078967074816
+
+            **Thank you!** ❤️
+            `,
+            })
@@ -0,0 +1,32 @@
+on:
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v4
+        with:
+          github-token: ${{secrets.GITHUB_TOKEN}}
+          script: |
+            github.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: `👋 Thanks for contributing to Viper! You are awesome! 🎉
+
+            A maintainer will take a look at your pull request shortly. 👀
+
+            In the meantime: We are working on **Viper v2** and we would love to hear your thoughts about what you like or don't like about Viper, so we can improve or fix those issues.
+
+            ⏰ If you have a couple minutes, please take some time and share your thoughts: https://forms.gle/R6faU74qPRPAzchZ9
+
+            📣 If you've already given us your feedback, you can still help by spreading the news,
+            either by sharing the above link or telling people about this on Twitter:
+
+            https://twitter.com/sagikazarmark/status/1306904078967074816
+
+            **Thank you!** ❤️
+            `,
+            })
@@ -0,0 +1,26 @@
+name: WASM
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    env:
+      GOFLAGS: -mod=readonly
+
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.16'
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Ensure Viper compiles for WASM
+        run: GOOS=js GOARCH=wasm go build .
@@ -1,20 +1,5 @@
+/.idea/
 /bin/
 /build/
 /var/
 /vendor/
-
-# IDE integration
-/.vscode/*
-!/.vscode/launch.json
-!/.vscode/tasks.json
-/.idea/*
-!/.idea/codeStyles/
-!/.idea/copyright/
-!/.idea/dataSources.xml
-!/.idea/*.iml
-!/.idea/externalDependencies.xml
-!/.idea/go.imports.xml
-!/.idea/modules.xml
-!/.idea/runConfigurations/
-!/.idea/scopes/
-!/.idea/sqldialects.xml
@@ -1,24 +1,93 @@
+run:
+    timeout: 5m
+
 linters-settings:
+    gci:
+        local-prefixes: github.com/spf13/viper
    golint:
-        min-confidence: 0.1
+        min-confidence: 0
    goimports:
        local-prefixes: github.com/spf13/viper

 linters:
-    enable-all: true
-    disable:
-        - funlen
-        - maligned
+    disable-all: true
+    enable:
+        - bodyclose
+        - deadcode
+        - dogsled
+        - dupl
+        - durationcheck
+        - exhaustive
+        - exportloopref
+        - gci
+        - goconst
+        - gofmt
+        - gofumpt
+        - goimports
+        - gomoddirectives
+        - goprintffuncname
+        - govet
+        - importas
+        - ineffassign
+        - makezero
+        - misspell
+        - nakedret
+        - nilerr
+        - noctx
+        - nolintlint
+        - prealloc
+        - predeclared
+        - revive
+        - rowserrcheck
+        - sqlclosecheck
+        - staticcheck
+        - structcheck
+        - stylecheck
+        - tparallel
+        - typecheck
+        - unconvert
+        - unparam
+        - unused
+        - varcheck
+        - wastedassign
+        - whitespace

-        # TODO: fix me
-        - wsl
-        - gochecknoinits
-        - gosimple
-        - gochecknoglobals
-        - errcheck
-        - lll
-        - godox
-        - scopelint
-        - gocyclo
-        - gocognit
-        - gocritic
+        # fixme
+        # - cyclop
+        # - errcheck
+        # - errorlint
+        # - exhaustivestruct
+        # - forbidigo
+        # - forcetypeassert
+        # - gochecknoglobals
+        # - gochecknoinits
+        # - gocognit
+        # - gocritic
+        # - gocyclo
+        # - godot
+        # - gosec
+        # - gosimple
+        # - ifshort
+        # - lll
+        # - nlreturn
+        # - paralleltest
+        # - scopelint
+        # - thelper
+        # - wrapcheck
+
+        # unused
+        # - depguard
+        # - goheader
+        # - gomodguard
+
+        # don't enable:
+        # - asciicheck
+        # - funlen
+        # - godox
+        # - goerr113
+        # - gomnd
+        # - interfacer
+        # - maligned
+        # - nestif
+        # - testpackage
+        # - wsl
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ExternalDependencies">
-    <plugin id="name.kropp.intellij.makefile" />
-    <plugin id="org.jetbrains.plugins.go" />
-  </component>
-</project>
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="GoImports">
-    <option name="groupStdlibImports" value="true" />
-    <option name="importSorting" value="GOFMT" />
-    <option name="moveAllImportsInOneDeclaration" value="true" />
-  </component>
-</project>
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/viper.iml" filepath="$PROJECT_DIR$/.idea/viper.iml" />
-    </modules>
-  </component>
-</project>
@@ -1,7 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Check" type="CompoundRunConfigurationType">
-    <toRun name="Tests" type="GoTestRunConfiguration" />
-    <toRun name="Lint" type="MAKEFILE_TARGET_RUN_CONFIGURATION" />
-    <method v="2" />
-  </configuration>
-</component>
@@ -1,8 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Lint" type="MAKEFILE_TARGET_RUN_CONFIGURATION" factoryName="Makefile">
-    <makefile filename="$PROJECT_DIR$/Makefile" target="lint" workingDirectory="" arguments="">
-      <envs />
-    </makefile>
-    <method v="2" />
-  </configuration>
-</component>
@@ -1,23 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Tests" type="GoTestRunConfiguration" factoryName="Go Test">
-    <module name="viper" />
-    <working_directory value="$PROJECT_DIR$/" />
-    <go_parameters value="-i" />
-    <EXTENSION ID="net.ashald.envfile">
-      <option name="IS_ENABLED" value="false" />
-      <option name="IS_SUBST" value="false" />
-      <option name="IS_PATH_MACRO_SUPPORTED" value="false" />
-      <option name="IS_IGNORE_MISSING_FILES" value="false" />
-      <option name="IS_ENABLE_EXPERIMENTAL_INTEGRATIONS" value="false" />
-      <ENTRIES>
-        <ENTRY IS_ENABLED="true" PARSER="runconfig" />
-      </ENTRIES>
-    </EXTENSION>
-    <framework value="gotest" />
-    <kind value="DIRECTORY" />
-    <package value="github.com/spf13/viper" />
-    <directory value="$PROJECT_DIR$/" />
-    <filePath value="$PROJECT_DIR$/" />
-    <method v="2" />
-  </configuration>
-</component>
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="WEB_MODULE" version="4">
-  <component name="Go" enabled="true" />
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
@@ -1,32 +0,0 @@
-go_import_path: github.com/spf13/viper
-
-language: go
-
-env:
-  global:
-    - GO111MODULE="on"
-    - GOFLAGS="-mod=readonly"
-
-go:
-  - 1.11.x
-  - 1.12.x
-  - 1.13.x
-  - tip
-
-os:
-  - linux
-  - osx
-
-matrix:
-  allow_failures:
-    - go: tip
-  fast_finish: true
-
-script:
-  - go install ./...
-  - diff -u <(echo -n) <(gofmt -d .)
-  - go test -v ./...
-
-after_success:
-  - go get -u -d github.com/spf13/hugo
-  - cd $GOPATH/src/github.com/spf13/hugo && make && ./hugo -s docs && cd -
@@ -15,8 +15,8 @@ TEST_FORMAT = short-verbose
 endif

 # Dependency versions
-GOTESTSUM_VERSION = 0.4.0
-GOLANGCI_VERSION = 1.21.0
+GOTESTSUM_VERSION = 1.6.4
+GOLANGCI_VERSION = 1.40.1

 # Add the ability to override some variables
 # Use with care
@@ -49,7 +49,7 @@ bin/golangci-lint: bin/golangci-lint-${GOLANGCI_VERSION}
 bin/golangci-lint-${GOLANGCI_VERSION}:
 	@mkdir -p bin
 	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b ./bin/ v${GOLANGCI_VERSION}
-	@mv bin/golangci-lint $@
+	@mv bin/golangci-lint "$@"

 .PHONY: lint
 lint: bin/golangci-lint ## Run linter
@@ -1,10 +1,20 @@
-![viper logo](https://cloud.githubusercontent.com/assets/173412/10886745/998df88a-8151-11e5-9448-4736db51020d.png)
+> ## Viper v2 feedback
+> Viper is heading towards v2 and we would love to hear what _**you**_ would like to see in it. Share your thoughts here: https://forms.gle/R6faU74qPRPAzchZ9
+>
+> **Thank you!**

-Go configuration with fangs!
+![Viper](.github/logo.png?raw=true)

-[![Actions](https://github.com/spf13/viper/workflows/CI/badge.svg)](https://github.com/spf13/viper)
+[![Mentioned in Awesome Go](https://awesome.re/mentioned-badge-flat.svg)](https://github.com/avelino/awesome-go#configuration)
+[![run on repl.it](https://repl.it/badge/github/sagikazarmark/Viper-example)](https://repl.it/@sagikazarmark/Viper-example#main.go)
+
+[![GitHub Workflow Status](https://img.shields.io/github/workflow/status/spf13/viper/CI?style=flat-square)](https://github.com/spf13/viper/actions?query=workflow%3ACI)
 [![Join the chat at https://gitter.im/spf13/viper](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/spf13/viper?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![GoDoc](https://godoc.org/github.com/spf13/viper?status.svg)](https://godoc.org/github.com/spf13/viper)
+[![Go Report Card](https://goreportcard.com/badge/github.com/spf13/viper?style=flat-square)](https://goreportcard.com/report/github.com/spf13/viper)
+![Go Version](https://img.shields.io/badge/go%20version-%3E=1.14-61CFDD.svg?style=flat-square)
+[![PkgGoDev](https://pkg.go.dev/badge/mod/github.com/spf13/viper)](https://pkg.go.dev/mod/github.com/spf13/viper)
+
+**Go configuration with fangs!**

 Many Go projects are built using Viper including:

@@ -21,10 +31,12 @@ Many Go projects are built using Viper including:

 ## Install

-```console
+```shell
 go get github.com/spf13/viper
 ```

+**Note:** Viper uses [Go Modules](https://github.com/golang/go/wiki/Modules) to manage dependencies.
+

 ## What is Viper?

@@ -107,7 +119,7 @@ viper.AddConfigPath("$HOME/.appname")  // call multiple times to add many search
 viper.AddConfigPath(".")               // optionally look for config in the working directory
 err := viper.ReadInConfig() // Find and read the config file
 if err != nil { // Handle errors reading the config file
-	panic(fmt.Errorf("Fatal error config file: %s \n", err))
+	panic(fmt.Errorf("Fatal error config file: %w \n", err))
 }
 ```

@@ -242,9 +254,10 @@ using `SetEnvPrefix`, you can tell Viper to use a prefix while reading from
 the environment variables. Both `BindEnv` and `AutomaticEnv` will use this
 prefix.

-`BindEnv` takes one or two parameters. The first parameter is the key name, the
-second is the name of the environment variable. The name of the environment
-variable is case sensitive. If the ENV variable name is not provided, then
+`BindEnv` takes one or more parameters. The first parameter is the key name, the
+rest are the name of the environment variables to bind to this key. If more than
+one are provided, they will take precedence in the specified order. The name of
+the environment variable is case sensitive. If the ENV variable name is not provided, then
 Viper will automatically assume that the ENV variable matches the following format: prefix + "_" + the key name in ALL CAPS. When you explicitly provide the ENV variable name (the second parameter),
 it **does not** automatically add the prefix. For example if the second parameter is "id",
 Viper will look for the ENV variable "ID".
@@ -256,7 +269,7 @@ the `BindEnv` is called.
 `AutomaticEnv` is a powerful helper especially when combined with
 `SetEnvPrefix`. When called, Viper will check for an environment variable any
 time a `viper.Get` request is made. It will apply the following rules. It will
-check for a environment variable with a name matching the key uppercased and
+check for an environment variable with a name matching the key uppercased and
 prefixed with the `EnvPrefix` if set.

 `SetEnvKeyReplacer` allows you to use a `strings.Replacer` object to rewrite Env
@@ -400,7 +413,7 @@ in a Key/Value store such as etcd or Consul.  These values take precedence over
 default values, but are overridden by configuration values retrieved from disk,
 flags, or environment variables.

-Viper uses [crypt](https://github.com/xordataexchange/crypt) to retrieve
+Viper uses [crypt](https://github.com/bketelsen/crypt) to retrieve
 configuration from the K/V store, which means that you can store your
 configuration values encrypted and have them automatically decrypted if you have
 the correct gpg keyring.  Encryption is optional.
@@ -412,7 +425,7 @@ independently of it.
 K/V store. `crypt` defaults to etcd on http://127.0.0.1:4001.

 ```bash
-$ go get github.com/xordataexchange/crypt/bin/crypt
+$ go get github.com/bketelsen/crypt/bin/crypt
 $ crypt set -plaintext /config/hugo.json /Users/hugo/settings/config.json
 ```

@@ -435,7 +448,7 @@ err := viper.ReadRemoteConfig()
 ```

 #### Consul
-You need to set a key to Consul key/value storage with JSON value containing your desired config.  
+You need to set a key to Consul key/value storage with JSON value containing your desired config.
 For example, create a Consul key/value store key `MY_CONSUL_KEY` with value:

 ```json
@@ -454,6 +467,16 @@ fmt.Println(viper.Get("port")) // 8080
 fmt.Println(viper.Get("hostname")) // myhostname.com
 ```

+#### Firestore
+
+```go
+viper.AddRemoteProvider("firestore", "google-cloud-project-id", "collection/document")
+viper.SetConfigType("json") // Config's format: "json", "toml", "yaml", "yml"
+err := viper.ReadRemoteConfig()
+```
+
+Of course, you're allowed to use `SecureRemoteProvider` also
+
 ### Remote Key/Value Store Example - Encrypted

 ```go
@@ -569,6 +592,33 @@ the `Set()` method, …) with an immediate value, then all sub-keys of
 `datastore.metric` become undefined, they are “shadowed” by the higher-priority
 configuration level.

+Viper can access array indices by using numbers in the path. For example:
+
+```json
+{
+    "host": {
+        "address": "localhost",
+        "ports": [
+            5799,
+            6029
+        ]
+    },
+    "datastore": {
+        "metric": {
+            "host": "127.0.0.1",
+            "port": 3099
+        },
+        "warehouse": {
+            "host": "198.0.0.1",
+            "port": 2112
+        }
+    }
+}
+
+GetInt("host.ports.1") // returns 6029
+
+```
+
 Lastly, if there exists a key that matches the delimited key path, its value
 will be returned instead. E.g.

@@ -594,14 +644,15 @@ will be returned instead. E.g.
 GetString("datastore.metric.host") // returns "0.0.0.0"
 ```

-### Extract sub-tree
+### Extracting a sub-tree

-Extract sub-tree from Viper.
+When developing reusable modules, it's often useful to extract a subset of the configuration
+and pass it to a module. This way the module can be instantiated more than once, with different configurations.

-For example, `viper` represents:
+For example, an application might use multiple different cache stores for different purposes:

-```json
-app:
+```yaml
+cache:
  cache1:
    max-items: 100
    item-size: 64
@@ -610,35 +661,36 @@ app:
    item-size: 80
 ```

-After executing:
+We could pass the cache name to a module (eg. `NewCache("cache1")`),
+but it would require weird concatenation for accessing config keys and would be less separated from the global config.
+
+So instead of doing that let's pass a Viper instance to the constructor that represents a subset of the configuration:

 ```go
-subv := viper.Sub("app.cache1")
+cache1Config := viper.Sub("cache.cache1")
+if cache1Config == nil { // Sub returns nil if the key cannot be found
+    panic("cache configuration not found")
+}
+
+cache1 := NewCache(cache1Config)
 ```

-`subv` represents:
+**Note:** Always check the return value of `Sub`. It returns `nil` if a key cannot be found.

-```json
-max-items: 100
-item-size: 64
-```
-
-Suppose we have:
+Internally, the `NewCache` function can address `max-items` and `item-size` keys directly:

 ```go
-func NewCache(cfg *Viper) *Cache {...}
+func NewCache(v *Viper) *Cache {
+    return &Cache{
+        MaxItems: v.GetInt("max-items"),
+        ItemSize: v.GetInt("item-size"),
+    }
+}
 ```

-which creates a cache based on config information formatted as `subv`.
-Now it’s easy to create these 2 caches separately as:
+The resulting code is easy to test, since it's decoupled from the main config structure,
+and easier to reuse (for the same reason).

-```go
-cfg1 := viper.Sub("app.cache1")
-cache1 := NewCache(cfg1)
-
-cfg2 := viper.Sub("app.cache2")
-cache2 := NewCache(cfg2)
-```

 ### Unmarshaling

@@ -726,16 +778,25 @@ if err != nil {

 Viper uses [github.com/mitchellh/mapstructure](https://github.com/mitchellh/mapstructure) under the hood for unmarshaling values which uses `mapstructure` tags by default.

+### Decoding custom formats
+
+A frequently requested feature for Viper is adding more value formats and decoders.
+For example, parsing character (dot, comma, semicolon, etc) separated strings into slices.
+
+This is already available in Viper using mapstructure decode hooks.
+
+Read more about the details in [this blog post](https://sagikazarmark.hu/blog/decoding-custom-formats-with-viper/).
+
 ### Marshalling to string

-You may need to marshal all the settings held in viper into a string rather than write them to a file. 
+You may need to marshal all the settings held in viper into a string rather than write them to a file.
 You can use your favorite format's marshaller with the config returned by `AllSettings()`.

 ```go
 import (
    yaml "gopkg.in/yaml.v2"
    // ...
-) 
+)

 func yamlStringSettings() string {
    c := viper.AllSettings()
@@ -779,15 +840,35 @@ y.SetDefault("ContentDir", "foobar")
 When working with multiple vipers, it is up to the user to keep track of the
 different vipers.

+
 ## Q & A

-Q: Why is it called “Viper”?
+### Why is it called “Viper”?

 A: Viper is designed to be a [companion](http://en.wikipedia.org/wiki/Viper_(G.I._Joe))
 to [Cobra](https://github.com/spf13/cobra). While both can operate completely
 independently, together they make a powerful pair to handle much of your
 application foundation needs.

-Q: Why is it called “Cobra”?
+### Why is it called “Cobra”?

-A: Is there a better name for a [commander](http://en.wikipedia.org/wiki/Cobra_Commander)?
+Is there a better name for a [commander](http://en.wikipedia.org/wiki/Cobra_Commander)?
+
+### Does Viper support case sensitive keys?
+
+**tl;dr:** No.
+
+Viper merges configuration from various sources, many of which are either case insensitive or uses different casing than the rest of the sources (eg. env vars).
+In order to provide the best experience when using multiple sources, the decision has been made to make all keys case insensitive.
+
+There has been several attempts to implement case sensitivity, but unfortunately it's not that trivial. We might take a stab at implementing it in [Viper v2](https://github.com/spf13/viper/issues/772), but despite the initial noise, it does not seem to be requested that much.
+
+You can vote for case sensitivity by filling out this feedback form: https://forms.gle/R6faU74qPRPAzchZ9
+
+### Is it safe to concurrently read and write to a viper?
+
+No, you will need to synchronize access to the viper yourself (for example by using the `sync` package). Concurrent reads and writes can cause a panic.
+
+## Troubleshooting
+
+See [TROUBLESHOOTING.md](TROUBLESHOOTING.md).
@@ -0,0 +1,23 @@
+# Troubleshooting
+
+## Unmarshaling doesn't work
+
+The most common reason for this issue is improper use of struct tags (eg. `yaml` or `json`). Viper uses [github.com/mitchellh/mapstructure](https://github.com/mitchellh/mapstructure) under the hood for unmarshaling values which uses `mapstructure` tags by default. Please refer to the library's documentation for using other struct tags.
+
+## Cannot find package
+
+Viper installation seems to fail a lot lately with the following (or a similar) error:
+
+```
+cannot find package "github.com/hashicorp/hcl/tree/hcl1" in any of:
+/usr/local/Cellar/go/1.15.7_1/libexec/src/github.com/hashicorp/hcl/tree/hcl1 (from $GOROOT)
+/Users/user/go/src/github.com/hashicorp/hcl/tree/hcl1 (from $GOPATH)
+```
+
+As the error message suggests, Go tries to look up dependencies in `GOPATH` mode (as it's commonly called) from the `GOPATH`.
+Viper opted to use [Go Modules](https://github.com/golang/go/wiki/Modules) to manage its dependencies. While in many cases the two methods are interchangeable, once a dependency releases new (major) versions, `GOPATH` mode is no longer able to decide which version to use, so it'll either use one that's already present or pick a version (usually the `master` branch).
+
+The solution is easy: switch to using Go Modules.
+Please refer to the [wiki](https://github.com/golang/go/wiki/Modules) on how to do that.
+
+**tl;dr* `export GO111MODULE=on`
@@ -0,0 +1,19 @@
+# 1. Record architecture decisions
+
+Date: 2021-07-20
+
+## Status
+
+Proposed
+
+## Context
+
+We need to record the architectural decisions made on this project.
+
+## Decision
+
+We will use Architecture Decision Records, as [described by Michael Nygard](http://thinkrelevance.com/blog/2011/11/15/documenting-architecture-decisions).
+
+## Consequences
+
+See Michael Nygard's article, linked above. For a lightweight ADR toolset, see Nat Pryce's [adr-tools](https://github.com/npryce/adr-tools).
@@ -0,0 +1,32 @@
+# 2. Prefer making backward compatible changes
+
+Date: 2021-07-20
+
+## Status
+
+Proposed
+
+Referenced by [3. Extract components with heavy dependencies from the core](0003-extract-components-with-heavy-dependencies-from-the-core.md)
+
+Referenced by [4. Use separate GitHub organization for new packages](0004-use-separate-github-organization-for-new-packages.md)
+
+Referenced by [7. Drop writing support](0007-drop-writing-support.md)
+
+## Context
+
+Architecturally speaking Viper became a giant over the years: it hides a lot of complexity behind a simple interface.
+That simple interface, however, is what makes Viper extremely popular.
+
+## Decision
+
+In order to keep the library useful to people, we should prefer making backward compatible changes to Viper, even between major releases.
+This is not a hard rule forbiding breaking changes though: when it makes sense, breaking changes are allowed,
+but keeping things backward compatible is a priority.
+
+## Consequences
+
+Although major versions allow breaking changes, a major release is no reason to break things that already work for a lot of people,
+even if it might not be the best possible solution.
+
+Instead of breaking things, introducing new interfaces should be the default way of fixing architectural problems,
+leaving old interfaces intact.
@@ -0,0 +1,26 @@
+# 3. Extract components with heavy dependencies from the core
+
+Date: 2021-07-20
+
+## Status
+
+Proposed
+
+References [2. Prefer making backward compatible changes](0002-prefer-making-backward-compatible-changes.md)
+
+Referenced by [4. Use separate GitHub organization for new packages](0004-use-separate-github-organization-for-new-packages.md)
+
+## Context
+
+Viper (v1) currently imports a bunch of external dependencies (for encoding/decoding, remote stores, etc)
+that make the library itself quite a heavy dependency.
+
+## Decision
+
+Move components with external dependencies out of the core to separate packages.
+
+## Consequences
+
+Viper 1 will have to continue importing all of these packages to maintain backwards compatibility.
+
+Viper 2 (and future versions) on the other hand can break backwards compatibility and require users to import the required packages.
@@ -0,0 +1,24 @@
+# 4. Use separate GitHub organization for new packages
+
+Date: 2021-07-20
+
+## Status
+
+Proposed
+
+References [2. Prefer making backward compatible changes](0002-prefer-making-backward-compatible-changes.md)
+
+References [3. Extract components with heavy dependencies from the core](0003-extract-components-with-heavy-dependencies-from-the-core.md)
+
+## Context
+
+The core Viper package is under a personal GitHub account which makes collaborative development a bit difficult.
+
+## Decision
+
+Create new Go modules in the [go-viper](https://github.com/go-viper) organization.
+Keep the core library under [Steve's personal account](https://github.com/spf13/viper) for backward compatibility purposes.
+
+## Consequences
+
+It'll be easier to create new modules and to add new functionality to Viper without having to add new dependencies to the core library.
@@ -0,0 +1,30 @@
+# 5. Deprecate setters in favor of functional options during initialization
+
+Date: 2021-07-20
+
+## Status
+
+Proposed
+
+Referenced by [8. Deprecate the global Viper instance](0008-deprecate-the-global-viper-instance.md)
+
+## Context
+
+The Viper struct currently acts as a facade for reading, writing and watching configuration for changes.
+Some of the configuration parameters can be changed runtime using setters which often lead to issues
+with concurrent activities.
+
+## Decision
+
+Deprecate setters in favor of using functional options for configuring Viper when it's initialized.
+
+Drop setters in Viper 2.
+
+## Consequences
+
+Since Viper's interface is usually invoked from a lot of places,
+moving configuration to the place where it is initialized makes using Viper safer
+(ie. someone can't just randomly call `Set` when they are only supposed to call `Get*`).
+
+This change will also clarify what roles Viper can be used in and
+makes the separation of internal components easier based on these roles.
@@ -0,0 +1,20 @@
+# 6. Go version support
+
+Date: 2021-09-16
+
+## Status
+
+Proposed
+
+## Context
+
+From time to time new features are released in the Go language.
+Relying on those features means dropping support for older Go versions.
+
+## Decision
+
+Follow the [Go release policy](https://golang.org/doc/devel/release#policy) and support the last two major versions of Go.
+
+## Consequences
+
+Support for older Go versions will happen every 6 months according to the Go release cycle.
@@ -0,0 +1,22 @@
+# 7. Drop writing support
+
+Date: 2021-09-22
+
+## Status
+
+Proposed
+
+References [2. Prefer making backward compatible changes](0002-prefer-making-backward-compatible-changes.md)
+
+## Context
+
+The number one source of issues for Viper comes from the fact that it supports both reading and writing.
+It causes concurrency issues and has lots of inconsistencies.
+
+## Decision
+
+Drop file writing support from Viper in v2.
+
+## Consequences
+
+This is going to be a major breaking change in the library, but it will make maintenance significantly easier.
@@ -0,0 +1,23 @@
+# 8. Deprecate the global Viper instance
+
+Date: 2021-09-23
+
+## Status
+
+Proposed
+
+References [5. Deprecate setters in favor of functional options during initialization](0005-deprecate-setters-in-favor-of-functional-options-during-initialization.md)
+
+## Context
+
+With the deprecation of setters in favor of functional options, it becomes almost impossible to get away with instantiating Viper.
+In addition to that, people should be discouraged from accessing a global Viper instance.
+
+## Decision
+
+Deprecate the global Viper instance and the global access functions.
+
+## Consequences
+
+People will still be able to create a global instance of their own,
+but instantiating a custom Viper instance will become the primary solution for using Viper.
@@ -10,13 +10,13 @@ import (
 func TestBindFlagValueSet(t *testing.T) {
 	flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)

-	var testValues = map[string]*string{
+	testValues := map[string]*string{
 		"host":     nil,
 		"port":     nil,
 		"endpoint": nil,
 	}

-	var mutatedTestValues = map[string]string{
+	mutatedTestValues := map[string]string{
 		"host":     "localhost",
 		"port":     "6060",
 		"endpoint": "/public",
@@ -44,8 +44,8 @@ func TestBindFlagValueSet(t *testing.T) {
 }

 func TestBindFlagValue(t *testing.T) {
-	var testString = "testing"
-	var testValue = newStringValue(testString, &testString)
+	testString := "testing"
+	testValue := newStringValue(testString, &testString)

 	flag := &pflag.Flag{
 		Name:    "testflag",
@@ -59,7 +59,7 @@ func TestBindFlagValue(t *testing.T) {
 	assert.Equal(t, testString, Get("testvalue"))

 	flag.Value.Set("testing_mutate")
-	flag.Changed = true //hack for pflag usage
+	flag.Changed = true // hack for pflag usage

 	assert.Equal(t, "testing_mutate", Get("testvalue"))
 }
@@ -3,46 +3,19 @@ module github.com/spf13/viper
 go 1.12

 require (
-	github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6 // indirect
-	github.com/coreos/bbolt v1.3.2 // indirect
-	github.com/coreos/etcd v3.3.10+incompatible // indirect
-	github.com/coreos/go-semver v0.2.0 // indirect
-	github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e // indirect
-	github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
-	github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
-	github.com/fsnotify/fsnotify v1.4.7
-	github.com/gogo/protobuf v1.2.1 // indirect
-	github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef // indirect
-	github.com/google/btree v1.0.0 // indirect
-	github.com/gorilla/websocket v1.4.0 // indirect
-	github.com/grpc-ecosystem/go-grpc-middleware v1.0.0 // indirect
-	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
-	github.com/grpc-ecosystem/grpc-gateway v1.9.0 // indirect
+	github.com/bketelsen/crypt v0.0.4
+	github.com/fsnotify/fsnotify v1.4.9
 	github.com/hashicorp/hcl v1.0.0
-	github.com/jonboulle/clockwork v0.1.0 // indirect
-	github.com/magiconair/properties v1.8.1
-	github.com/mitchellh/mapstructure v1.1.2
-	github.com/pelletier/go-toml v1.2.0
-	github.com/prometheus/client_golang v0.9.3 // indirect
+	github.com/magiconair/properties v1.8.5
+	github.com/mitchellh/mapstructure v1.4.1
+	github.com/pelletier/go-toml v1.9.3
 	github.com/smartystreets/goconvey v1.6.4 // indirect
-	github.com/soheilhy/cmux v0.1.4 // indirect
-	github.com/spf13/afero v1.1.2
-	github.com/spf13/cast v1.3.0
-	github.com/spf13/jwalterweatherman v1.0.0
-	github.com/spf13/pflag v1.0.3
-	github.com/stretchr/testify v1.2.2
+	github.com/spf13/afero v1.6.0
+	github.com/spf13/cast v1.3.1
+	github.com/spf13/jwalterweatherman v1.1.0
+	github.com/spf13/pflag v1.0.5
+	github.com/stretchr/testify v1.7.0
 	github.com/subosito/gotenv v1.2.0
-	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
-	github.com/ugorji/go v1.1.4 // indirect
-	github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
-	github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77
-	go.etcd.io/bbolt v1.3.2 // indirect
-	go.uber.org/atomic v1.4.0 // indirect
-	go.uber.org/multierr v1.1.0 // indirect
-	go.uber.org/zap v1.10.0 // indirect
-	golang.org/x/net v0.0.0-20190522155817-f3200d17e092 // indirect
-	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 // indirect
-	google.golang.org/grpc v1.21.0 // indirect
-	gopkg.in/ini.v1 v1.51.0
-	gopkg.in/yaml.v2 v2.2.4
+	gopkg.in/ini.v1 v1.62.0
+	gopkg.in/yaml.v2 v2.4.0
 )
@@ -1,192 +1,632 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
+cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
+cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg=
+cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8=
+cloud.google.com/go v0.81.0 h1:at8Tk2zUz63cLPR0JPWm5vp77pEZmzxEQBEfRKn1VV8=
+cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
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@@ -0,0 +1,61 @@
+package encoding
+
+import (
+	"sync"
+)
+
+// Decoder decodes the contents of b into a v representation.
+// It's primarily used for decoding contents of a file into a map[string]interface{}.
+type Decoder interface {
+	Decode(b []byte, v interface{}) error
+}
+
+const (
+	// ErrDecoderNotFound is returned when there is no decoder registered for a format.
+	ErrDecoderNotFound = encodingError("decoder not found for this format")
+
+	// ErrDecoderFormatAlreadyRegistered is returned when an decoder is already registered for a format.
+	ErrDecoderFormatAlreadyRegistered = encodingError("decoder already registered for this format")
+)
+
+// DecoderRegistry can choose an appropriate Decoder based on the provided format.
+type DecoderRegistry struct {
+	decoders map[string]Decoder
+
+	mu sync.RWMutex
+}
+
+// NewDecoderRegistry returns a new, initialized DecoderRegistry.
+func NewDecoderRegistry() *DecoderRegistry {
+	return &DecoderRegistry{
+		decoders: make(map[string]Decoder),
+	}
+}
+
+// RegisterDecoder registers a Decoder for a format.
+// Registering a Decoder for an already existing format is not supported.
+func (e *DecoderRegistry) RegisterDecoder(format string, enc Decoder) error {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	if _, ok := e.decoders[format]; ok {
+		return ErrDecoderFormatAlreadyRegistered
+	}
+
+	e.decoders[format] = enc
+
+	return nil
+}
+
+// Decode calls the underlying Decoder based on the format.
+func (e *DecoderRegistry) Decode(format string, b []byte, v interface{}) error {
+	e.mu.RLock()
+	decoder, ok := e.decoders[format]
+	e.mu.RUnlock()
+
+	if !ok {
+		return ErrDecoderNotFound
+	}
+
+	return decoder.Decode(b, v)
+}
@@ -0,0 +1,77 @@
+package encoding
+
+import (
+	"testing"
+)
+
+type decoder struct {
+	v interface{}
+}
+
+func (d decoder) Decode(_ []byte, v interface{}) error {
+	rv := v.(*string)
+	*rv = d.v.(string)
+
+	return nil
+}
+
+func TestDecoderRegistry_RegisterDecoder(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+
+		err := registry.RegisterDecoder("myformat", decoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+
+	t.Run("AlreadyRegistered", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+
+		err := registry.RegisterDecoder("myformat", decoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		err = registry.RegisterDecoder("myformat", decoder{})
+		if err != ErrDecoderFormatAlreadyRegistered {
+			t.Fatalf("expected ErrDecoderFormatAlreadyRegistered, got: %v", err)
+		}
+	})
+}
+
+func TestDecoderRegistry_Decode(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+		decoder := decoder{
+			v: "decoded value",
+		}
+
+		err := registry.RegisterDecoder("myformat", decoder)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		var v string
+
+		err = registry.Decode("myformat", []byte("some value"), &v)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if v != "decoded value" {
+			t.Fatalf("expected 'decoded value', got: %#v", v)
+		}
+	})
+
+	t.Run("DecoderNotFound", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+
+		var v string
+
+		err := registry.Decode("myformat", []byte("some value"), &v)
+		if err != ErrDecoderNotFound {
+			t.Fatalf("expected ErrDecoderNotFound, got: %v", err)
+		}
+	})
+}
@@ -0,0 +1,60 @@
+package encoding
+
+import (
+	"sync"
+)
+
+// Encoder encodes the contents of v into a byte representation.
+// It's primarily used for encoding a map[string]interface{} into a file format.
+type Encoder interface {
+	Encode(v interface{}) ([]byte, error)
+}
+
+const (
+	// ErrEncoderNotFound is returned when there is no encoder registered for a format.
+	ErrEncoderNotFound = encodingError("encoder not found for this format")
+
+	// ErrEncoderFormatAlreadyRegistered is returned when an encoder is already registered for a format.
+	ErrEncoderFormatAlreadyRegistered = encodingError("encoder already registered for this format")
+)
+
+// EncoderRegistry can choose an appropriate Encoder based on the provided format.
+type EncoderRegistry struct {
+	encoders map[string]Encoder
+
+	mu sync.RWMutex
+}
+
+// NewEncoderRegistry returns a new, initialized EncoderRegistry.
+func NewEncoderRegistry() *EncoderRegistry {
+	return &EncoderRegistry{
+		encoders: make(map[string]Encoder),
+	}
+}
+
+// RegisterEncoder registers an Encoder for a format.
+// Registering a Encoder for an already existing format is not supported.
+func (e *EncoderRegistry) RegisterEncoder(format string, enc Encoder) error {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	if _, ok := e.encoders[format]; ok {
+		return ErrEncoderFormatAlreadyRegistered
+	}
+
+	e.encoders[format] = enc
+
+	return nil
+}
+
+func (e *EncoderRegistry) Encode(format string, v interface{}) ([]byte, error) {
+	e.mu.RLock()
+	encoder, ok := e.encoders[format]
+	e.mu.RUnlock()
+
+	if !ok {
+		return nil, ErrEncoderNotFound
+	}
+
+	return encoder.Encode(v)
+}
@@ -0,0 +1,70 @@
+package encoding
+
+import (
+	"testing"
+)
+
+type encoder struct {
+	b []byte
+}
+
+func (e encoder) Encode(_ interface{}) ([]byte, error) {
+	return e.b, nil
+}
+
+func TestEncoderRegistry_RegisterEncoder(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+
+		err := registry.RegisterEncoder("myformat", encoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+
+	t.Run("AlreadyRegistered", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+
+		err := registry.RegisterEncoder("myformat", encoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		err = registry.RegisterEncoder("myformat", encoder{})
+		if err != ErrEncoderFormatAlreadyRegistered {
+			t.Fatalf("expected ErrEncoderFormatAlreadyRegistered, got: %v", err)
+		}
+	})
+}
+
+func TestEncoderRegistry_Decode(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+		encoder := encoder{
+			b: []byte("encoded value"),
+		}
+
+		err := registry.RegisterEncoder("myformat", encoder)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		b, err := registry.Encode("myformat", "some value")
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if string(b) != "encoded value" {
+			t.Fatalf("expected 'encoded value', got: %#v", string(b))
+		}
+	})
+
+	t.Run("EncoderNotFound", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+
+		_, err := registry.Encode("myformat", "some value")
+		if err != ErrEncoderNotFound {
+			t.Fatalf("expected ErrEncoderNotFound, got: %v", err)
+		}
+	})
+}
@@ -0,0 +1,7 @@
+package encoding
+
+type encodingError string
+
+func (e encodingError) Error() string {
+	return string(e)
+}
@@ -0,0 +1,40 @@
+package hcl
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/hashicorp/hcl"
+	"github.com/hashicorp/hcl/hcl/printer"
+)
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for HCL encoding.
+// TODO: add printer config to the codec?
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	b, err := json.Marshal(v)
+	if err != nil {
+		return nil, err
+	}
+
+	// TODO: use printer.Format? Is the trailing newline an issue?
+
+	ast, err := hcl.Parse(string(b))
+	if err != nil {
+		return nil, err
+	}
+
+	var buf bytes.Buffer
+
+	err = printer.Fprint(&buf, ast.Node)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	return hcl.Unmarshal(b, v)
+}
@@ -0,0 +1,17 @@
+package json
+
+import (
+	"encoding/json"
+)
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for JSON encoding.
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	// TODO: expose prefix and indent in the Codec as setting?
+	return json.MarshalIndent(v, "", "  ")
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	return json.Unmarshal(b, v)
+}
@@ -0,0 +1,45 @@
+package toml
+
+import (
+	"github.com/pelletier/go-toml"
+)
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for TOML encoding.
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	if m, ok := v.(map[string]interface{}); ok {
+		t, err := toml.TreeFromMap(m)
+		if err != nil {
+			return nil, err
+		}
+
+		s, err := t.ToTomlString()
+		if err != nil {
+			return nil, err
+		}
+
+		return []byte(s), nil
+	}
+
+	return toml.Marshal(v)
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	tree, err := toml.LoadBytes(b)
+	if err != nil {
+		return err
+	}
+
+	if m, ok := v.(*map[string]interface{}); ok {
+		vmap := *m
+		tmap := tree.ToMap()
+		for k, v := range tmap {
+			vmap[k] = v
+		}
+
+		return nil
+	}
+
+	return tree.Unmarshal(v)
+}
@@ -0,0 +1,14 @@
+package yaml
+
+import "gopkg.in/yaml.v2"
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for YAML encoding.
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	return yaml.Marshal(v)
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	return yaml.Unmarshal(b, v)
+}
@@ -0,0 +1,42 @@
+package testutil
+
+import (
+	"os"
+	"testing"
+)
+
+// Based on https://github.com/frankban/quicktest/blob/577841610793d24f99e31cc2c0ef3a541fefd7c7/patch.go#L34-L64
+// Licensed under the MIT license
+// Copyright (c) 2017 Canonical Ltd.
+
+// Setenv sets an environment variable to a temporary value for the
+// duration of the test.
+//
+// At the end of the test (see "Deferred execution" in the package docs), the
+// environment variable is returned to its original value.
+func Setenv(t *testing.T, name, val string) {
+	setenv(t, name, val, true)
+}
+
+// Unsetenv unsets an environment variable for the duration of a test.
+func Unsetenv(t *testing.T, name string) {
+	setenv(t, name, "", false)
+}
+
+// setenv sets or unsets an environment variable to a temporary value for the
+// duration of the test
+func setenv(t *testing.T, name, val string, valOK bool) {
+	oldVal, oldOK := os.LookupEnv(name)
+	if valOK {
+		os.Setenv(name, val)
+	} else {
+		os.Unsetenv(name)
+	}
+	t.Cleanup(func() {
+		if oldOK {
+			os.Setenv(name, oldVal)
+		} else {
+			os.Unsetenv(name)
+		}
+	})
+}
@@ -78,6 +78,7 @@ func TestNestedOverrides(t *testing.T) {
 func overrideDefault(assert *assert.Assertions, firstPath string, firstValue interface{}, secondPath string, secondValue interface{}) *Viper {
 	return overrideFromLayer(defaultLayer, assert, firstPath, firstValue, secondPath, secondValue)
 }
+
 func override(assert *assert.Assertions, firstPath string, firstValue interface{}, secondPath string, secondValue interface{}) *Viper {
 	return overrideFromLayer(overrideLayer, assert, firstPath, firstValue, secondPath, secondValue)
 }
@@ -11,9 +11,9 @@ import (
 	"io"
 	"os"

-	"github.com/spf13/viper"
+	crypt "github.com/bketelsen/crypt/config"

-	crypt "github.com/xordataexchange/crypt/config"
+	"github.com/spf13/viper"
 )

 type remoteConfigProvider struct{}
@@ -82,15 +82,21 @@ func getConfigManager(rp viper.RemoteProvider) (crypt.ConfigManager, error) {
 			return nil, err
 		}
 		defer kr.Close()
-		if rp.Provider() == "etcd" {
+		switch rp.Provider() {
+		case "etcd":
 			cm, err = crypt.NewEtcdConfigManager([]string{rp.Endpoint()}, kr)
-		} else {
+		case "firestore":
+			cm, err = crypt.NewFirestoreConfigManager([]string{rp.Endpoint()}, kr)
+		default:
 			cm, err = crypt.NewConsulConfigManager([]string{rp.Endpoint()}, kr)
 		}
 	} else {
-		if rp.Provider() == "etcd" {
+		switch rp.Provider() {
+		case "etcd":
 			cm, err = crypt.NewStandardEtcdConfigManager([]string{rp.Endpoint()})
-		} else {
+		case "firestore":
+			cm, err = crypt.NewStandardFirestoreConfigManager([]string{rp.Endpoint()})
+		default:
 			cm, err = crypt.NewStandardConsulConfigManager([]string{rp.Endpoint()})
 		}
 	}
@@ -91,13 +91,22 @@ func insensitiviseMap(m map[string]interface{}) {
 func absPathify(inPath string) string {
 	jww.INFO.Println("Trying to resolve absolute path to", inPath)

-	if strings.HasPrefix(inPath, "$HOME") {
+	if inPath == "$HOME" || strings.HasPrefix(inPath, "$HOME"+string(os.PathSeparator)) {
 		inPath = userHomeDir() + inPath[5:]
 	}

 	if strings.HasPrefix(inPath, "$") {
 		end := strings.Index(inPath, string(os.PathSeparator))
-		inPath = os.Getenv(inPath[1:end]) + inPath[end:]
+
+		var value, suffix string
+		if end == -1 {
+			value = os.Getenv(inPath[1:])
+		} else {
+			value = os.Getenv(inPath[1:end])
+			suffix = inPath[end:]
+		}
+
+		inPath = value + suffix
 	}

 	if filepath.IsAbs(inPath) {
@@ -11,25 +11,29 @@
 package viper

 import (
+	"os"
+	"path/filepath"
 	"reflect"
 	"testing"
+
+	"github.com/spf13/viper/internal/testutil"
 )

 func TestCopyAndInsensitiviseMap(t *testing.T) {
 	var (
 		given = map[string]interface{}{
 			"Foo": 32,
-			"Bar": map[interface{}]interface {
-			}{
+			"Bar": map[interface{}]interface{}{
 				"ABc": "A",
-				"cDE": "B"},
+				"cDE": "B",
+			},
 		}
 		expected = map[string]interface{}{
 			"foo": 32,
-			"bar": map[string]interface {
-			}{
+			"bar": map[string]interface{}{
 				"abc": "A",
-				"cde": "B"},
+				"cde": "B",
+			},
 		}
 	)

@@ -52,3 +56,38 @@ func TestCopyAndInsensitiviseMap(t *testing.T) {
 		t.Fatal("Input map changed")
 	}
 }
+
+func TestAbsPathify(t *testing.T) {
+	home := userHomeDir()
+	homer := filepath.Join(home, "homer")
+	wd, _ := os.Getwd()
+
+	testutil.Setenv(t, "HOMER_ABSOLUTE_PATH", homer)
+	testutil.Setenv(t, "VAR_WITH_RELATIVE_PATH", "relative")
+
+	tests := []struct {
+		input  string
+		output string
+	}{
+		{"", wd},
+		{"sub", filepath.Join(wd, "sub")},
+		{"./", wd},
+		{"./sub", filepath.Join(wd, "sub")},
+		{"$HOME", home},
+		{"$HOME/", home},
+		{"$HOME/sub", filepath.Join(home, "sub")},
+		{"$HOMER_ABSOLUTE_PATH", homer},
+		{"$HOMER_ABSOLUTE_PATH/", homer},
+		{"$HOMER_ABSOLUTE_PATH/sub", filepath.Join(homer, "sub")},
+		{"$VAR_WITH_RELATIVE_PATH", filepath.Join(wd, "relative")},
+		{"$VAR_WITH_RELATIVE_PATH/", filepath.Join(wd, "relative")},
+		{"$VAR_WITH_RELATIVE_PATH/sub", filepath.Join(wd, "relative", "sub")},
+	}
+
+	for _, test := range tests {
+		got := absPathify(test.input)
+		if got != test.output {
+			t.Errorf("Got %v\nexpected\n%q", got, test.output)
+		}
+	}
+}
@@ -26,10 +26,11 @@ import (
 	"github.com/mitchellh/mapstructure"
 	"github.com/spf13/afero"
 	"github.com/spf13/cast"
-
 	"github.com/spf13/pflag"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
+	"github.com/spf13/viper/internal/testutil"
 )

 var yamlExample = []byte(`Hacker: true
@@ -487,11 +488,12 @@ func TestEnv(t *testing.T) {
 	initJSON()

 	BindEnv("id")
-	BindEnv("f", "FOOD")
+	BindEnv("f", "FOOD", "OLD_FOOD")

-	os.Setenv("ID", "13")
-	os.Setenv("FOOD", "apple")
-	os.Setenv("NAME", "crunk")
+	testutil.Setenv(t, "ID", "13")
+	testutil.Setenv(t, "FOOD", "apple")
+	testutil.Setenv(t, "OLD_FOOD", "banana")
+	testutil.Setenv(t, "NAME", "crunk")

 	assert.Equal(t, "13", Get("id"))
 	assert.Equal(t, "apple", Get("f"))
@@ -502,18 +504,23 @@ func TestEnv(t *testing.T) {
 	assert.Equal(t, "crunk", Get("name"))
 }

+func TestMultipleEnv(t *testing.T) {
+	initJSON()
+
+	BindEnv("f", "FOOD", "OLD_FOOD")
+
+	testutil.Setenv(t, "OLD_FOOD", "banana")
+
+	assert.Equal(t, "banana", Get("f"))
+}
+
 func TestEmptyEnv(t *testing.T) {
 	initJSON()

 	BindEnv("type") // Empty environment variable
 	BindEnv("name") // Bound, but not set environment variable

-	os.Unsetenv("type")
-	os.Unsetenv("TYPE")
-	os.Unsetenv("name")
-	os.Unsetenv("NAME")
-
-	os.Setenv("TYPE", "")
+	testutil.Setenv(t, "TYPE", "")

 	assert.Equal(t, "donut", Get("type"))
 	assert.Equal(t, "Cake", Get("name"))
@@ -527,12 +534,7 @@ func TestEmptyEnv_Allowed(t *testing.T) {
 	BindEnv("type") // Empty environment variable
 	BindEnv("name") // Bound, but not set environment variable

-	os.Unsetenv("type")
-	os.Unsetenv("TYPE")
-	os.Unsetenv("name")
-	os.Unsetenv("NAME")
-
-	os.Setenv("TYPE", "")
+	testutil.Setenv(t, "TYPE", "")

 	assert.Equal(t, "", Get("type"))
 	assert.Equal(t, "Cake", Get("name"))
@@ -545,9 +547,9 @@ func TestEnvPrefix(t *testing.T) {
 	BindEnv("id")
 	BindEnv("f", "FOOD") // not using prefix

-	os.Setenv("FOO_ID", "13")
-	os.Setenv("FOOD", "apple")
-	os.Setenv("FOO_NAME", "crunk")
+	testutil.Setenv(t, "FOO_ID", "13")
+	testutil.Setenv(t, "FOOD", "apple")
+	testutil.Setenv(t, "FOO_NAME", "crunk")

 	assert.Equal(t, "13", Get("id"))
 	assert.Equal(t, "apple", Get("f"))
@@ -562,7 +564,9 @@ func TestAutoEnv(t *testing.T) {
 	Reset()

 	AutomaticEnv()
-	os.Setenv("FOO_BAR", "13")
+
+	testutil.Setenv(t, "FOO_BAR", "13")
+
 	assert.Equal(t, "13", Get("foo_bar"))
 }

@@ -571,7 +575,9 @@ func TestAutoEnvWithPrefix(t *testing.T) {

 	AutomaticEnv()
 	SetEnvPrefix("Baz")
-	os.Setenv("BAZ_BAR", "13")
+
+	testutil.Setenv(t, "BAZ_BAR", "13")
+
 	assert.Equal(t, "13", Get("bar"))
 }

@@ -579,7 +585,8 @@ func TestSetEnvKeyReplacer(t *testing.T) {
 	Reset()

 	AutomaticEnv()
-	os.Setenv("REFRESH_INTERVAL", "30s")
+
+	testutil.Setenv(t, "REFRESH_INTERVAL", "30s")

 	replacer := strings.NewReplacer("-", "_")
 	SetEnvKeyReplacer(replacer)
@@ -591,7 +598,8 @@ func TestEnvKeyReplacer(t *testing.T) {
 	v := NewWithOptions(EnvKeyReplacer(strings.NewReplacer("-", "_")))

 	v.AutomaticEnv()
-	_ = os.Setenv("REFRESH_INTERVAL", "30s")
+
+	testutil.Setenv(t, "REFRESH_INTERVAL", "30s")

 	assert.Equal(t, "30s", v.Get("refresh-interval"))
 }
@@ -694,7 +702,8 @@ func TestAllKeys(t *testing.T) {
 					{"key": 1},
 					{"key": 2},
 					{"key": 3},
-					{"key": 4}},
+					{"key": 4},
+				},
 			},
 		},
 		"title_dotenv": "DotEnv Example",
@@ -717,8 +726,9 @@ func TestAllKeysWithEnv(t *testing.T) {
 	v.BindEnv("id")
 	v.BindEnv("foo.bar")
 	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
-	os.Setenv("ID", "13")
-	os.Setenv("FOO_BAR", "baz")
+
+	testutil.Setenv(t, "ID", "13")
+	testutil.Setenv(t, "FOO_BAR", "baz")

 	expectedKeys := sort.StringSlice{"id", "foo.bar"}
 	expectedKeys.Sort()
@@ -828,13 +838,13 @@ func TestBindPFlags(t *testing.T) {
 	v := New() // create independent Viper object
 	flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)

-	var testValues = map[string]*string{
+	testValues := map[string]*string{
 		"host":     nil,
 		"port":     nil,
 		"endpoint": nil,
 	}

-	var mutatedTestValues = map[string]string{
+	mutatedTestValues := map[string]string{
 		"host":     "localhost",
 		"port":     "6060",
 		"endpoint": "/public",
@@ -859,12 +869,13 @@ func TestBindPFlags(t *testing.T) {
 	}
 }

+// nolint: dupl
 func TestBindPFlagsStringSlice(t *testing.T) {
 	tests := []struct {
 		Expected []string
 		Value    string
 	}{
-		{nil, ""},
+		{[]string{}, ""},
 		{[]string{"jeden"}, "jeden"},
 		{[]string{"dwa", "trzy"}, "dwa,trzy"},
 		{[]string{"cztery", "piec , szesc"}, "cztery,\"piec , szesc\""},
@@ -898,6 +909,7 @@ func TestBindPFlagsStringSlice(t *testing.T) {
 			}
 			if changed {
 				assert.Equal(t, testValue.Expected, val.StringSlice)
+				assert.Equal(t, testValue.Expected, v.Get("stringslice"))
 			} else {
 				assert.Equal(t, defaultVal, val.StringSlice)
 			}
@@ -905,12 +917,61 @@ func TestBindPFlagsStringSlice(t *testing.T) {
 	}
 }

+// nolint: dupl
+func TestBindPFlagsStringArray(t *testing.T) {
+	tests := []struct {
+		Expected []string
+		Value    string
+	}{
+		{[]string{}, ""},
+		{[]string{"jeden"}, "jeden"},
+		{[]string{"dwa,trzy"}, "dwa,trzy"},
+		{[]string{"cztery,\"piec , szesc\""}, "cztery,\"piec , szesc\""},
+	}
+
+	v := New() // create independent Viper object
+	defaultVal := []string{"default"}
+	v.SetDefault("stringarray", defaultVal)
+
+	for _, testValue := range tests {
+		flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
+		flagSet.StringArray("stringarray", testValue.Expected, "test")
+
+		for _, changed := range []bool{true, false} {
+			flagSet.VisitAll(func(f *pflag.Flag) {
+				f.Value.Set(testValue.Value)
+				f.Changed = changed
+			})
+
+			err := v.BindPFlags(flagSet)
+			if err != nil {
+				t.Fatalf("error binding flag set, %v", err)
+			}
+
+			type TestStr struct {
+				StringArray []string
+			}
+			val := &TestStr{}
+			if err := v.Unmarshal(val); err != nil {
+				t.Fatalf("%+#v cannot unmarshal: %s", testValue.Value, err)
+			}
+			if changed {
+				assert.Equal(t, testValue.Expected, val.StringArray)
+				assert.Equal(t, testValue.Expected, v.Get("stringarray"))
+			} else {
+				assert.Equal(t, defaultVal, val.StringArray)
+			}
+		}
+	}
+}
+
+// nolint: dupl
 func TestBindPFlagsIntSlice(t *testing.T) {
 	tests := []struct {
 		Expected []int
 		Value    string
 	}{
-		{nil, ""},
+		{[]int{}, ""},
 		{[]int{1}, "1"},
 		{[]int{2, 3}, "2,3"},
 	}
@@ -943,6 +1004,7 @@ func TestBindPFlagsIntSlice(t *testing.T) {
 			}
 			if changed {
 				assert.Equal(t, testValue.Expected, val.IntSlice)
+				assert.Equal(t, testValue.Expected, v.Get("intslice"))
 			} else {
 				assert.Equal(t, defaultVal, val.IntSlice)
 			}
@@ -951,8 +1013,8 @@ func TestBindPFlagsIntSlice(t *testing.T) {
 }

 func TestBindPFlag(t *testing.T) {
-	var testString = "testing"
-	var testValue = newStringValue(testString, &testString)
+	testString := "testing"
+	testValue := newStringValue(testString, &testString)

 	flag := &pflag.Flag{
 		Name:    "testflag",
@@ -970,16 +1032,69 @@ func TestBindPFlag(t *testing.T) {
 	assert.Equal(t, "testing_mutate", Get("testvalue"))
 }

+func TestBindPFlagDetectNilFlag(t *testing.T) {
+	result := BindPFlag("testvalue", nil)
+	assert.Error(t, result)
+}
+
+func TestBindPFlagStringToString(t *testing.T) {
+	tests := []struct {
+		Expected map[string]string
+		Value    string
+	}{
+		{map[string]string{}, ""},
+		{map[string]string{"yo": "hi"}, "yo=hi"},
+		{map[string]string{"yo": "hi", "oh": "hi=there"}, "yo=hi,oh=hi=there"},
+		{map[string]string{"yo": ""}, "yo="},
+		{map[string]string{"yo": "", "oh": "hi=there"}, "yo=,oh=hi=there"},
+	}
+
+	v := New() // create independent Viper object
+	defaultVal := map[string]string{}
+	v.SetDefault("stringtostring", defaultVal)
+
+	for _, testValue := range tests {
+		flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
+		flagSet.StringToString("stringtostring", testValue.Expected, "test")
+
+		for _, changed := range []bool{true, false} {
+			flagSet.VisitAll(func(f *pflag.Flag) {
+				f.Value.Set(testValue.Value)
+				f.Changed = changed
+			})
+
+			err := v.BindPFlags(flagSet)
+			if err != nil {
+				t.Fatalf("error binding flag set, %v", err)
+			}
+
+			type TestMap struct {
+				StringToString map[string]string
+			}
+			val := &TestMap{}
+			if err := v.Unmarshal(val); err != nil {
+				t.Fatalf("%+#v cannot unmarshal: %s", testValue.Value, err)
+			}
+			if changed {
+				assert.Equal(t, testValue.Expected, val.StringToString)
+			} else {
+				assert.Equal(t, defaultVal, val.StringToString)
+			}
+		}
+	}
+}
+
 func TestBoundCaseSensitivity(t *testing.T) {
 	assert.Equal(t, "brown", Get("eyes"))

 	BindEnv("eYEs", "TURTLE_EYES")
-	os.Setenv("TURTLE_EYES", "blue")
+
+	testutil.Setenv(t, "TURTLE_EYES", "blue")

 	assert.Equal(t, "blue", Get("eyes"))

-	var testString = "green"
-	var testValue = newStringValue(testString, &testString)
+	testString := "green"
+	testValue := newStringValue(testString, &testString)

 	flag := &pflag.Flag{
 		Name:    "eyeballs",
@@ -1058,9 +1173,11 @@ func TestFindsNestedKeys(t *testing.T) {
 				},
 				map[string]interface{}{
 					"type": "Chocolate",
-				}, map[string]interface{}{
+				},
+				map[string]interface{}{
 					"type": "Blueberry",
-				}, map[string]interface{}{
+				},
+				map[string]interface{}{
 					"type": "Devil's Food",
 				},
 			},
@@ -1153,8 +1270,9 @@ func TestIsSet(t *testing.T) {
 	v.BindEnv("foo")
 	v.BindEnv("clothing.hat")
 	v.BindEnv("clothing.hats")
-	os.Setenv("FOO", "bar")
-	os.Setenv("CLOTHING_HAT", "bowler")
+
+	testutil.Setenv(t, "FOO", "bar")
+	testutil.Setenv(t, "CLOTHING_HAT", "bowler")

 	assert.True(t, v.IsSet("eyes"))           // in the config file
 	assert.True(t, v.IsSet("foo"))            // in the environment
@@ -1279,26 +1397,6 @@ var hclWriteExpected = []byte(`"foos" = {

 "type" = "donut"`)

-func TestWriteConfigHCL(t *testing.T) {
-	v := New()
-	fs := afero.NewMemMapFs()
-	v.SetFs(fs)
-	v.SetConfigName("c")
-	v.SetConfigType("hcl")
-	err := v.ReadConfig(bytes.NewBuffer(hclExample))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if err := v.WriteConfigAs("c.hcl"); err != nil {
-		t.Fatal(err)
-	}
-	read, err := afero.ReadFile(fs, "c.hcl")
-	if err != nil {
-		t.Fatal(err)
-	}
-	assert.Equal(t, hclWriteExpected, read)
-}
-
 var jsonWriteExpected = []byte(`{
  "batters": {
    "batter": [
@@ -1322,26 +1420,6 @@ var jsonWriteExpected = []byte(`{
  "type": "donut"
 }`)

-func TestWriteConfigJson(t *testing.T) {
-	v := New()
-	fs := afero.NewMemMapFs()
-	v.SetFs(fs)
-	v.SetConfigName("c")
-	v.SetConfigType("json")
-	err := v.ReadConfig(bytes.NewBuffer(jsonExample))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if err := v.WriteConfigAs("c.json"); err != nil {
-		t.Fatal(err)
-	}
-	read, err := afero.ReadFile(fs, "c.json")
-	if err != nil {
-		t.Fatal(err)
-	}
-	assert.Equal(t, jsonWriteExpected, read)
-}
-
 var propertiesWriteExpected = []byte(`p_id = 0001
 p_type = donut
 p_name = Cake
@@ -1349,95 +1427,6 @@ p_ppu = 0.55
 p_batters.batter.type = Regular
 `)

-func TestWriteConfigProperties(t *testing.T) {
-	v := New()
-	fs := afero.NewMemMapFs()
-	v.SetFs(fs)
-	v.SetConfigName("c")
-	v.SetConfigType("properties")
-	err := v.ReadConfig(bytes.NewBuffer(propertiesExample))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if err := v.WriteConfigAs("c.properties"); err != nil {
-		t.Fatal(err)
-	}
-	read, err := afero.ReadFile(fs, "c.properties")
-	if err != nil {
-		t.Fatal(err)
-	}
-	assert.Equal(t, propertiesWriteExpected, read)
-}
-
-func TestWriteConfigTOML(t *testing.T) {
-	fs := afero.NewMemMapFs()
-	v := New()
-	v.SetFs(fs)
-	v.SetConfigName("c")
-	v.SetConfigType("toml")
-	err := v.ReadConfig(bytes.NewBuffer(tomlExample))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if err := v.WriteConfigAs("c.toml"); err != nil {
-		t.Fatal(err)
-	}
-
-	// The TOML String method does not order the contents.
-	// Therefore, we must read the generated file and compare the data.
-	v2 := New()
-	v2.SetFs(fs)
-	v2.SetConfigName("c")
-	v2.SetConfigType("toml")
-	v2.SetConfigFile("c.toml")
-	err = v2.ReadInConfig()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	assert.Equal(t, v.GetString("title"), v2.GetString("title"))
-	assert.Equal(t, v.GetString("owner.bio"), v2.GetString("owner.bio"))
-	assert.Equal(t, v.GetString("owner.dob"), v2.GetString("owner.dob"))
-	assert.Equal(t, v.GetString("owner.organization"), v2.GetString("owner.organization"))
-}
-
-var dotenvWriteExpected = []byte(`
-TITLE="DotEnv Write Example"
-NAME=Oreo
-KIND=Biscuit
-`)
-
-func TestWriteConfigDotEnv(t *testing.T) {
-	fs := afero.NewMemMapFs()
-	v := New()
-	v.SetFs(fs)
-	v.SetConfigName("c")
-	v.SetConfigType("env")
-	err := v.ReadConfig(bytes.NewBuffer(dotenvWriteExpected))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if err := v.WriteConfigAs("c.env"); err != nil {
-		t.Fatal(err)
-	}
-
-	// The TOML String method does not order the contents.
-	// Therefore, we must read the generated file and compare the data.
-	v2 := New()
-	v2.SetFs(fs)
-	v2.SetConfigName("c")
-	v2.SetConfigType("env")
-	v2.SetConfigFile("c.env")
-	err = v2.ReadInConfig()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	assert.Equal(t, v.GetString("title"), v2.GetString("title"))
-	assert.Equal(t, v.GetString("type"), v2.GetString("type"))
-	assert.Equal(t, v.GetString("kind"), v2.GetString("kind"))
-}
-
 var yamlWriteExpected = []byte(`age: 35
 beard: true
 clothing:
@@ -1454,24 +1443,237 @@ hobbies:
 name: steve
 `)

-func TestWriteConfigYAML(t *testing.T) {
-	v := New()
+func TestWriteConfig(t *testing.T) {
 	fs := afero.NewMemMapFs()
-	v.SetFs(fs)
-	v.SetConfigName("c")
-	v.SetConfigType("yaml")
-	err := v.ReadConfig(bytes.NewBuffer(yamlExample))
-	if err != nil {
-		t.Fatal(err)
+	testCases := map[string]struct {
+		configName      string
+		inConfigType    string
+		outConfigType   string
+		fileName        string
+		input           []byte
+		expectedContent []byte
+	}{
+		"hcl with file extension": {
+			configName:      "c",
+			inConfigType:    "hcl",
+			outConfigType:   "hcl",
+			fileName:        "c.hcl",
+			input:           hclExample,
+			expectedContent: hclWriteExpected,
+		},
+		"hcl without file extension": {
+			configName:      "c",
+			inConfigType:    "hcl",
+			outConfigType:   "hcl",
+			fileName:        "c",
+			input:           hclExample,
+			expectedContent: hclWriteExpected,
+		},
+		"hcl with file extension and mismatch type": {
+			configName:      "c",
+			inConfigType:    "hcl",
+			outConfigType:   "json",
+			fileName:        "c.hcl",
+			input:           hclExample,
+			expectedContent: hclWriteExpected,
+		},
+		"json with file extension": {
+			configName:      "c",
+			inConfigType:    "json",
+			outConfigType:   "json",
+			fileName:        "c.json",
+			input:           jsonExample,
+			expectedContent: jsonWriteExpected,
+		},
+		"json without file extension": {
+			configName:      "c",
+			inConfigType:    "json",
+			outConfigType:   "json",
+			fileName:        "c",
+			input:           jsonExample,
+			expectedContent: jsonWriteExpected,
+		},
+		"json with file extension and mismatch type": {
+			configName:      "c",
+			inConfigType:    "json",
+			outConfigType:   "hcl",
+			fileName:        "c.json",
+			input:           jsonExample,
+			expectedContent: jsonWriteExpected,
+		},
+		"properties with file extension": {
+			configName:      "c",
+			inConfigType:    "properties",
+			outConfigType:   "properties",
+			fileName:        "c.properties",
+			input:           propertiesExample,
+			expectedContent: propertiesWriteExpected,
+		},
+		"properties without file extension": {
+			configName:      "c",
+			inConfigType:    "properties",
+			outConfigType:   "properties",
+			fileName:        "c",
+			input:           propertiesExample,
+			expectedContent: propertiesWriteExpected,
+		},
+		"yaml with file extension": {
+			configName:      "c",
+			inConfigType:    "yaml",
+			outConfigType:   "yaml",
+			fileName:        "c.yaml",
+			input:           yamlExample,
+			expectedContent: yamlWriteExpected,
+		},
+		"yaml without file extension": {
+			configName:      "c",
+			inConfigType:    "yaml",
+			outConfigType:   "yaml",
+			fileName:        "c",
+			input:           yamlExample,
+			expectedContent: yamlWriteExpected,
+		},
+		"yaml with file extension and mismatch type": {
+			configName:      "c",
+			inConfigType:    "yaml",
+			outConfigType:   "json",
+			fileName:        "c.yaml",
+			input:           yamlExample,
+			expectedContent: yamlWriteExpected,
+		},
 	}
-	if err := v.WriteConfigAs("c.yaml"); err != nil {
-		t.Fatal(err)
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			v := New()
+			v.SetFs(fs)
+			v.SetConfigName(tc.fileName)
+			v.SetConfigType(tc.inConfigType)
+
+			err := v.ReadConfig(bytes.NewBuffer(tc.input))
+			if err != nil {
+				t.Fatal(err)
+			}
+			v.SetConfigType(tc.outConfigType)
+			if err := v.WriteConfigAs(tc.fileName); err != nil {
+				t.Fatal(err)
+			}
+			read, err := afero.ReadFile(fs, tc.fileName)
+			if err != nil {
+				t.Fatal(err)
+			}
+			assert.Equal(t, tc.expectedContent, read)
+		})
 	}
-	read, err := afero.ReadFile(fs, "c.yaml")
-	if err != nil {
-		t.Fatal(err)
+}
+
+func TestWriteConfigTOML(t *testing.T) {
+	fs := afero.NewMemMapFs()
+
+	testCases := map[string]struct {
+		configName string
+		configType string
+		fileName   string
+		input      []byte
+	}{
+		"with file extension": {
+			configName: "c",
+			configType: "toml",
+			fileName:   "c.toml",
+			input:      tomlExample,
+		},
+		"without file extension": {
+			configName: "c",
+			configType: "toml",
+			fileName:   "c",
+			input:      tomlExample,
+		},
+	}
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			v := New()
+			v.SetFs(fs)
+			v.SetConfigName(tc.configName)
+			v.SetConfigType(tc.configType)
+			err := v.ReadConfig(bytes.NewBuffer(tc.input))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if err := v.WriteConfigAs(tc.fileName); err != nil {
+				t.Fatal(err)
+			}
+
+			// The TOML String method does not order the contents.
+			// Therefore, we must read the generated file and compare the data.
+			v2 := New()
+			v2.SetFs(fs)
+			v2.SetConfigName(tc.configName)
+			v2.SetConfigType(tc.configType)
+			v2.SetConfigFile(tc.fileName)
+			err = v2.ReadInConfig()
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			assert.Equal(t, v.GetString("title"), v2.GetString("title"))
+			assert.Equal(t, v.GetString("owner.bio"), v2.GetString("owner.bio"))
+			assert.Equal(t, v.GetString("owner.dob"), v2.GetString("owner.dob"))
+			assert.Equal(t, v.GetString("owner.organization"), v2.GetString("owner.organization"))
+		})
+	}
+}
+
+func TestWriteConfigDotEnv(t *testing.T) {
+	fs := afero.NewMemMapFs()
+	testCases := map[string]struct {
+		configName string
+		configType string
+		fileName   string
+		input      []byte
+	}{
+		"with file extension": {
+			configName: "c",
+			configType: "env",
+			fileName:   "c.env",
+			input:      dotenvExample,
+		},
+		"without file extension": {
+			configName: "c",
+			configType: "env",
+			fileName:   "c",
+			input:      dotenvExample,
+		},
+	}
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			v := New()
+			v.SetFs(fs)
+			v.SetConfigName(tc.configName)
+			v.SetConfigType(tc.configType)
+			err := v.ReadConfig(bytes.NewBuffer(tc.input))
+			if err != nil {
+				t.Fatal(err)
+			}
+			if err := v.WriteConfigAs(tc.fileName); err != nil {
+				t.Fatal(err)
+			}
+
+			// The TOML String method does not order the contents.
+			// Therefore, we must read the generated file and compare the data.
+			v2 := New()
+			v2.SetFs(fs)
+			v2.SetConfigName(tc.configName)
+			v2.SetConfigType(tc.configType)
+			v2.SetConfigFile(tc.fileName)
+			err = v2.ReadInConfig()
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			assert.Equal(t, v.GetString("title_dotenv"), v2.GetString("title_dotenv"))
+			assert.Equal(t, v.GetString("type_dotenv"), v2.GetString("type_dotenv"))
+			assert.Equal(t, v.GetString("kind_dotenv"), v2.GetString("kind_dotenv"))
+		})
 	}
-	assert.Equal(t, yamlWriteExpected, read)
 }

 func TestSafeWriteConfig(t *testing.T) {
@@ -1541,6 +1743,7 @@ hello:
    pop: 37890
    largenum: 765432101234567
    num2pow63: 9223372036854775808
+    universe: null
    world:
    - us
    - uk
@@ -1838,18 +2041,18 @@ func TestCaseInsensitiveSet(t *testing.T) {
 	Reset()
 	m1 := map[string]interface{}{
 		"Foo": 32,
-		"Bar": map[interface{}]interface {
-		}{
+		"Bar": map[interface{}]interface{}{
 			"ABc": "A",
-			"cDE": "B"},
+			"cDE": "B",
+		},
 	}

 	m2 := map[string]interface{}{
 		"Foo": 52,
-		"Bar": map[interface{}]interface {
-		}{
+		"Bar": map[interface{}]interface{}{
 			"bCd": "A",
-			"eFG": "B"},
+			"eFG": "B",
+		},
 	}

 	Set("Given1", m1)
@@ -2123,6 +2326,49 @@ func TestKeyDelimiter(t *testing.T) {
 	assert.Equal(t, expected, actual)
 }

+var yamlDeepNestedSlices = []byte(`TV:
+- title: "The expanse"
+  seasons:
+  - first_released: "December 14, 2015"
+    episodes:
+    - title: "Dulcinea"
+      air_date: "December 14, 2015"
+    - title: "The Big Empty"
+      air_date: "December 15, 2015"
+    - title: "Remember the Cant"
+      air_date: "December 22, 2015"
+  - first_released: "February 1, 2017"
+    episodes:
+    - title: "Safe"
+      air_date: "February 1, 2017"
+    - title: "Doors & Corners"
+      air_date: "February 1, 2017"
+    - title: "Static"
+      air_date: "February 8, 2017"
+  episodes:
+    - ["Dulcinea", "The Big Empty", "Remember the Cant"]
+    - ["Safe", "Doors & Corners", "Static"]
+`)
+
+func TestSliceIndexAccess(t *testing.T) {
+	v.SetConfigType("yaml")
+	r := strings.NewReader(string(yamlDeepNestedSlices))
+
+	err := v.unmarshalReader(r, v.config)
+	require.NoError(t, err)
+
+	assert.Equal(t, "The expanse", v.GetString("tv.0.title"))
+	assert.Equal(t, "February 1, 2017", v.GetString("tv.0.seasons.1.first_released"))
+	assert.Equal(t, "Static", v.GetString("tv.0.seasons.1.episodes.2.title"))
+	assert.Equal(t, "December 15, 2015", v.GetString("tv.0.seasons.0.episodes.1.air_date"))
+
+	// Test for index out of bounds
+	assert.Equal(t, "", v.GetString("tv.0.seasons.2.first_released"))
+
+	// Accessing multidimensional arrays
+	assert.Equal(t, "Static", v.GetString("tv.0.episodes.1.2"))
+}
+
 func BenchmarkGetBool(b *testing.B) {
 	key := "BenchmarkGetBool"
 	v = New()
@@ -0,0 +1,11 @@
+// +build !js
+
+package viper
+
+import "github.com/fsnotify/fsnotify"
+
+type watcher = fsnotify.Watcher
+
+func newWatcher() (*watcher, error) {
+	return fsnotify.NewWatcher()
+}
@@ -0,0 +1,30 @@
+// +build js,wasm
+
+package viper
+
+import (
+	"errors"
+
+	"github.com/fsnotify/fsnotify"
+)
+
+type watcher struct {
+	Events chan fsnotify.Event
+	Errors chan error
+}
+
+func (*watcher) Close() error {
+	return nil
+}
+
+func (*watcher) Add(name string) error {
+	return nil
+}
+
+func (*watcher) Remove(name string) error {
+	return nil
+}
+
+func newWatcher() (*watcher, error) {
+	return &watcher{}, errors.New("fsnotify is not supported on WASM")
+}
Author	SHA1	Message	Date
Mark Sagi-Kazar	99e9188c7c	docs: propose deprecating the global Viper instance Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-09-23 10:07:37 +02:00
Mark Sagi-Kazar	c943b3ef27	docs: propose dropping file writing support Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-09-22 23:10:51 +02:00
Mark Sagi-Kazar	a0f1caa4ed	docs: document a decision about Go version support Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-09-16 09:04:54 +02:00
Mark Sagi-Kazar	d2e3a7e5c2	docs: document some architectural decisions Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-07-20 23:54:12 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	ab4b05adc6	chore: add GitHub issue forms Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-07-14 04:02:54 +02:00
Márk Sági-Kazár	e866eaa591	Update feedback_pull_request.yml	2021-07-12 19:53:25 +02:00
Márk Sági-Kazár	bc5df54485	Update feedback_issue.yml	2021-07-12 19:53:25 +02:00
dependabot[bot]andMárk Sági-Kazár	409a7ba1d6	Bump actions/github-script from 3 to 4.0.2 Bumps [actions/github-script](https://github.com/actions/github-script) from 3 to 4.0.2. - [Release notes](https://github.com/actions/github-script/releases) - [Commits](https://github.com/actions/github-script/compare/v3...v4.0.2) --- updated-dependencies: - dependency-name: actions/github-script dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com>	2021-07-12 19:53:25 +02:00
Márk Sági-Kazár	489df740ac	Update dependabot.yml	2021-07-12 19:44:20 +02:00
Matthieu MORELandMárk Sági-Kazár	899b682f8c	Create dependabot.yml	2021-07-12 19:44:20 +02:00
Mark Sagi-Kazar	030b739e60	docs: add section about decoding formats Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-25 14:49:58 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	a02f9864fa	feat(encoding): Integrate the new encoding package into Viper Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-25 14:26:08 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	699d749768	feat(encoding): Add toml codec Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-25 14:26:08 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	6f15444771	feat(encoding): Add hcl codec Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-25 14:26:08 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	186266359b	feat(encoding): Add json codec Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-25 14:26:08 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	0e854bf27b	feat(encoding): Add yaml codec	2021-06-25 14:26:08 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	a00caae79f	feat(encoding): Encoder/Decoder registry implementations	2021-06-25 14:26:08 +02:00
Mikhail f. ShiryaevandMárk Sági-Kazár	bd03865899	Add a proper processing for pflag.StringArray	2021-06-25 13:55:36 +02:00
lmx-HexagramandMárk Sági-Kazár	3fcad43618	update %s to %w I apologize for my rude pr on modify readme I think it is better to use %w in fmt.Errorf instead of %s (see go doc)[https://golang.org/pkg/errors/]	2021-06-17 19:17:07 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	faa8ba0c53	chore: update gotestsum Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-16 03:06:32 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	65ee98690c	chore(lint): fix gofumpt Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-16 03:06:32 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	04ef5fa07d	chore: update golangci-lint Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-16 03:06:32 +02:00
Carlos Henrique Guardão GandarezandMárk Sági-Kazár	acd965b54e	Add ini load options argument Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-16 01:55:16 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	5f4d053c3e	chore(deps): update dependencies Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-16 01:47:15 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	dd57ae6279	chore(deps): update etcd Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-06-16 01:47:15 +02:00
Carolyn Van SlyckandMárk Sági-Kazár	cdb5e5976f	Fix merging a key into a nil target When merging a key where the target value is nil, the type of the target and source do not match. What currently happens is an error is logged and the key is skipped. I have changed it so that it does the same thing as when the target key is missing: copy the source value to the target. Signed-off-by: Carolyn Van Slyck <me@carolynvanslyck.com>	2021-05-17 08:55:31 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	36be6bf91f	feat: make sure Viper compiles on WASM fsnotify is not available on WASM, so config watching is not going to work. Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-04-24 10:24:23 +02:00
Chris WaldonandMárk Sági-Kazár	727a41c38a	doc: add a note about concurent Get/Set to godoc	2021-04-15 18:20:20 +02:00
Chris WaldonandMárk Sági-Kazár	cb41ae0ab8	doc: discuss concurrency in README	2021-04-15 18:20:20 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	7fdb267c73	chore: update dependencies Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-04-15 18:12:07 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	52536944d5	ci: add Go 1.16 to build matrix Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-03-15 09:30:15 +01:00
r-stepanenkoandGitHub	fb4eafdd97	fix INI saving panics (#1075 )	2021-03-10 14:46:19 +01:00
bridgetbarnesandGitHub	3c7b44f0bc	Update afero version (CVE-2020-14040) (#1090 ) * Update afero version * Ran go mod tidy	2021-03-10 14:45:23 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	4613c4a95f	docs: move troubleshooting to a new document Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-02-15 07:47:45 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	a86148e76e	docs: add note about go modules to the readme Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-02-15 07:47:45 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	e66f940bcc	docs: add troubleshooting guide about package not being found Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-02-15 07:47:45 +01:00
Mark Sagi-Kazar	d10c856f6c	Add discussions to issue links Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2021-01-11 03:55:13 +01:00
Márk Sági-KazárandGitHub	da70fee083	Add troubleshooting about unmarshaling	2020-12-17 22:13:27 +01:00
Mark Sagi-Kazar	99da8b22a1	Add labels to issue templates Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-12-11 17:36:00 +01:00
Mark Sagi-Kazar	811f0e6937	Add issue and PR templates Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-12-11 17:33:03 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	bba82cfc61	docs: add run on repl.it badge with example Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-12-03 01:43:52 +01:00
Benjamin LeeandMárk Sági-Kazár	6ddd35486b	Always quote $@	2020-12-02 14:59:11 +01:00
Márk Sági-KazárandGitHub	493643fd5e	Update README.md	2020-11-03 14:29:48 +01:00
Pablo Santiago Blum de AguiarandMárk Sági-Kazár	f415025b98	Fix a minor typo in README.md	2020-10-30 23:19:06 +01:00
Meysam GanJiandMárk Sági-Kazár	4938331709	fix typo	2020-10-12 09:45:20 +02:00
Mark Sagi-Kazar	8c89438499	docs: improve AutomaticEnv documentation Fixes #1000 Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-10-08 02:46:11 +02:00
dylandreimerinkandGitHub	33bcdc91ea	Added support for accessing slices (#861 ) * Added support for accessing slices * Processed PR feedback - renamed searchMapWithPathPrefixes to searchIndexableWithPathPrefixes - moved source type specific search logic to speparate functions - Inverted if statments to avoid the arrow pattern * Quickly return from searchSliceWithPathPrefixes and searchMapWithPathPrefixes functions without intermediate variables	2020-10-04 20:07:34 +02:00
Mark Sagi-Kazar	44e6ee8945	Use pull_request_target event in PR feedback Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-10-03 17:48:38 +02:00
Mark Sagi-Kazar	656b8771b8	Revert "Remove pull request feedback" This reverts commit `0a45372c6c`.	2020-10-03 17:48:08 +02:00
Mark Sagi-Kazar	0a45372c6c	Remove pull request feedback Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-10-01 22:37:29 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	82c2ddf493	Fix tests broken by mapstructure update Mapstructure so far returned nil for empty string slices. In a recent version this bug has been fixed: https://github.com/mitchellh/mapstructure/pull/155 Incidentally, this was a bug in Viper too: GetStringSlice and Unmarshal returned with different values. Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 15:03:37 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	16dc0f72ce	chore(deps): update mapstructure dependency Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 15:03:37 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	f67a901790	docs: add go version badge and update pkg.go.dev badge Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 13:15:51 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	d2df377935	ci: drop tests for Go 1.11-1.13 The Cleanup function used in this PR is only available from Go 1.14 While it would be nice to support more Go versions, Go itself does not support other than the last two, so that should be fine for Viper as well. Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 13:15:51 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	cfcfed504d	refactor: add setenv helper for tests Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 13:15:51 +02:00
Gabriel AszalosandMárk Sági-Kazár	ea890285a5	Update docs	2020-09-30 12:44:21 +02:00
Gabriel AszalosandMárk Sági-Kazár	b655224c01	Allow BindEnv to register multiple environment variables. This change modifies BindEnv to permit a list of environment variable names in order to support multiple env. vars. for the same config key. When this form is used, env. keys take precedence in the written order. Closes #971	2020-09-30 12:44:21 +02:00
Mark Sagi-Kazar	b534983313	Add some emojis to feedback bot Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 09:25:53 +02:00
Mark Sagi-Kazar	f3c095442f	Add some emojis to feedback bot Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 09:23:52 +02:00
Mark Sagi-Kazar	dd2e0fa15f	Add feedback bot to pull request Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 09:16:23 +02:00
Mark Sagi-Kazar	bed424f7c0	Add feedback bot to issue Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-30 09:13:00 +02:00
Mark Sagi-Kazar	29c3027c49	docs: rewrite sub documentation Fixes #988 Fixes #987 Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-27 22:59:46 +02:00
Mark Sagi-Kazar	6d4eb764b6	Add feedback form to the readme Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-27 01:06:10 +02:00
Mark Sagi-Kazar	406ea27dc0	Add feedback form to the readme Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-27 01:04:34 +02:00
Dan RolloandMárk Sági-Kazár	a0285163e1	ensure BindPFlag() detects a nil flag parameter before wrapping in pflagValue.	2020-09-23 19:29:16 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	d9d7dcdc63	Increase lint timeout Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-11 17:53:37 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	a5152092c6	Improve lint rules Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-11 17:53:37 +02:00
Mark Sagi-Kazar	ae12c841bc	Upgrade linter Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-11 17:43:32 +02:00
Mark Sagi-KazarandMárk Sági-Kazár	387404d518	Add log for remote config errors Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-09 22:37:34 +02:00
Mark Sagi-Kazar	f26928cd87	Add Go 1.15 to the build matrix Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-09 22:32:07 +02:00
Mark Sagi-Kazar	9c7144ec1e	Build on both linux and macos Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>	2020-09-05 23:53:06 +02:00
John GossetandMárk Sági-Kazár	3826be3135	Simplify $HOME prefix check	2020-07-31 23:39:06 +02:00
João AbecasisandMárk Sági-Kazár	ce534045f9	Fix environment variable expansion in absPathify - Don't expand user home directory for variable names that simply have a HOME prefix; - Support expansion of variables not followed by the path separator.	2020-07-31 23:39:06 +02:00
Oleg ButuzovandMárk Sági-Kazár	13494e8047	Skipping error != nil checks in favor of the fast return.	2020-07-16 06:22:21 +02:00
Mark Sagi-Kazar	13df721090	Add Go 1.14 to build targets	2020-05-09 11:42:39 +02:00
Trevor FosterandGitHub	3856c05f99	Fix: Getting the value of a StringToString pflag (#874 ) * add parsing for stringToString flags * add logic to return flags default if not val set, add a test * extract parsing into single func * add a few more cases * return nil if unable to parse instead of panicing * return map[string]interface in order to work with cast.ToStringMap * mostly copy pflags implementation of the conversion to a stringtostring	2020-05-09 11:38:39 +02:00
flow00andMárk Sági-Kazár	c6ee9808ab	fix_ini_save_error	2020-05-05 12:50:28 +02:00
John McBrideandGitHub	c42a305a4b	Update gorilla dependency (#899 ) * Update gorilla dependency * Run go mod tidy	2020-04-21 17:18:44 +02:00
Mark Sagi-Kazar	e34fb51dd7	Add mentioned in awesome badge	2020-04-09 23:56:02 +02:00
Mark Sagi-Kazar	7eea3718bf	Remove go version badge	2020-04-09 22:21:21 +02:00
Mark Sagi-Kazar	aa8e4d4983	Update badges and logo	2020-04-09 22:20:35 +02:00
Mark Sagi-Kazar	9b03d15591	Ignore idea	2020-04-09 20:15:13 +02:00
Gustavo BazanandGitHub	97ee7adfef	Add support to save file with no extension (#813 ) * Add support to save file with no extension The support introduced for files with no file extension is only partial as trying to save the config file would fail with `<file name> requires valid extension` This adds support to saving such files	2020-02-20 00:41:04 +01:00
Alexey MaslovandMárk Sági-Kazár	b31a49291e	updated docs in README.	2020-02-20 00:36:32 +01:00
Alexey MaslovandMárk Sági-Kazár	9c81997cb1	added firestore support.	2020-02-20 00:36:32 +01:00
Alexey MaslovandMárk Sági-Kazár	502400c0d9	changed github.com/xordataexchange/crypt to github.com/bketelsen/crypt.	2020-02-20 00:36:32 +01:00
aeneasrandMárk Sági-Kazár	7ddaa61d67	Remove .idea directory	2020-02-20 00:27:03 +01:00
Mark Sagi-Kazar	f2cbaea4c2	Fix copy-paste error in documentation Fixes #825	2020-01-16 19:54:31 +01:00
Mark Sagi-Kazar	df9f4af211	Remove travis config	2020-01-16 19:38:02 +01:00
Mark Sagi-Kazar	1b7d3e05fd	Improve golangci config	2020-01-16 19:37:50 +01:00
Mark Sagi-Kazar	16fb4b9d29	Add editorconfig	2020-01-16 19:37:42 +01:00