Add Go 1.14 to build targets

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
2024-04-21 12:31:38 +00:00 · 2020-05-09 11:42:39 +02:00 · 2020-05-09 11:38:39 +02:00 · 2020-05-05 12:50:28 +02:00 · 2020-04-21 17:18:44 +02:00 · 2020-04-09 23:56:02 +02:00
15 changed files with 1252 additions and 347 deletions
@@ -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]
+indent_size = 2
@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go: ['1.11', '1.12', '1.13', '1.14']
+    env:
+      VERBOSE: 1
+      GOFLAGS: -mod=readonly
+      GOPROXY: https://proxy.golang.org
+
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go }}
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Lint
+        run: make lint
+
+      - name: Test
+        run: make test
@@ -1,29 +1,5 @@
-# Compiled Object files, Static and Dynamic libs (Shared Objects)
-*.o
-*.a
-*.so
-
-# Folders
-_obj
-_test
-
-# Architecture specific extensions/prefixes
-*.[568vq]
-[568vq].out
-
-*.cgo1.go
-*.cgo2.c
-_cgo_defun.c
-_cgo_gotypes.go
-_cgo_export.*
-
-_testmain.go
-
-*.exe
-*.test
-*.bench
-
-.vscode
-
-# exclude dependencies in the `/vendor` folder
-vendor
+/.idea/
+/bin/
+/build/
+/var/
+/vendor/
@@ -0,0 +1,27 @@
+linters-settings:
+    golint:
+        min-confidence: 0.1
+    goimports:
+        local-prefixes: github.com/spf13/viper
+
+linters:
+    enable-all: true
+    disable:
+        - funlen
+        - maligned
+
+        # TODO: fix me
+        - wsl
+        - gochecknoinits
+        - gosimple
+        - gochecknoglobals
+        - errcheck
+        - lll
+        - godox
+        - scopelint
+        - gocyclo
+        - gocognit
+        - gocritic
+
+service:
+    golangci-lint-version: 1.21.x
@@ -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 -
@@ -0,0 +1,76 @@
+# A Self-Documenting Makefile: http://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
+
+OS = $(shell uname | tr A-Z a-z)
+export PATH := $(abspath bin/):${PATH}
+
+# Build variables
+BUILD_DIR ?= build
+export CGO_ENABLED ?= 0
+export GOOS = $(shell go env GOOS)
+ifeq (${VERBOSE}, 1)
+ifeq ($(filter -v,${GOARGS}),)
+	GOARGS += -v
+endif
+TEST_FORMAT = short-verbose
+endif
+
+# Dependency versions
+GOTESTSUM_VERSION = 0.4.0
+GOLANGCI_VERSION = 1.21.0
+
+# Add the ability to override some variables
+# Use with care
+-include override.mk
+
+.PHONY: clear
+clear: ## Clear the working area and the project
+	rm -rf bin/
+
+.PHONY: check
+check: test lint ## Run tests and linters
+
+bin/gotestsum: bin/gotestsum-${GOTESTSUM_VERSION}
+	@ln -sf gotestsum-${GOTESTSUM_VERSION} bin/gotestsum
+bin/gotestsum-${GOTESTSUM_VERSION}:
+	@mkdir -p bin
+	curl -L https://github.com/gotestyourself/gotestsum/releases/download/v${GOTESTSUM_VERSION}/gotestsum_${GOTESTSUM_VERSION}_${OS}_amd64.tar.gz | tar -zOxf - gotestsum > ./bin/gotestsum-${GOTESTSUM_VERSION} && chmod +x ./bin/gotestsum-${GOTESTSUM_VERSION}
+
+TEST_PKGS ?= ./...
+.PHONY: test
+test: TEST_FORMAT ?= short
+test: SHELL = /bin/bash
+test: export CGO_ENABLED=1
+test: bin/gotestsum ## Run tests
+	@mkdir -p ${BUILD_DIR}
+	bin/gotestsum --no-summary=skipped --junitfile ${BUILD_DIR}/coverage.xml --format ${TEST_FORMAT} -- -race -coverprofile=${BUILD_DIR}/coverage.txt -covermode=atomic $(filter-out -v,${GOARGS}) $(if ${TEST_PKGS},${TEST_PKGS},./...)
+
+bin/golangci-lint: bin/golangci-lint-${GOLANGCI_VERSION}
+	@ln -sf golangci-lint-${GOLANGCI_VERSION} bin/golangci-lint
+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 $@
+
+.PHONY: lint
+lint: bin/golangci-lint ## Run linter
+	bin/golangci-lint run
+
+.PHONY: fix
+fix: bin/golangci-lint ## Fix lint violations
+	bin/golangci-lint run --fix
+
+# Add custom targets here
+-include custom.mk
+
+.PHONY: list
+list: ## List all make targets
+	@${MAKE} -pRrn : -f $(MAKEFILE_LIST) 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | egrep -v -e '^[^[:alnum:]]' -e '^$@$$' | sort
+
+.PHONY: help
+.DEFAULT_GOAL := help
+help:
+	@grep -h -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+# Variable outputting/exporting rules
+var-%: ; @echo $($*)
+varexport-%: ; @echo $*=$($*)
@@ -1,6 +1,13 @@
-![viper logo](https://cloud.githubusercontent.com/assets/173412/10886745/998df88a-8151-11e5-9448-4736db51020d.png)
+![Viper](.github/logo.png?raw=true)

-Go configuration with fangs!
+[![Mentioned in Awesome Go](https://awesome.re/mentioned-badge-flat.svg)](https://github.com/avelino/awesome-go#configuration)
+
+[![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)
+[![Go Report Card](https://goreportcard.com/badge/github.com/spf13/viper?style=flat-square)](https://goreportcard.com/report/github.com/spf13/viper)
+[![go.dev reference](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/mod/github.com/spf13/viper)
+
+**Go configuration with fangs!**

 Many Go projects are built using Viper including:

@@ -12,14 +19,16 @@ Many Go projects are built using Viper including:
 * [BloomApi](https://www.bloomapi.com/)
 * [doctl](https://github.com/digitalocean/doctl)
 * [Clairctl](https://github.com/jgsqware/clairctl)
+* [Mercure](https://mercure.rocks)

-[![Build Status](https://travis-ci.org/spf13/viper.svg)](https://travis-ci.org/spf13/viper) [![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)

 ## Install
+
 ```console
-go get -u github.com/spf13/viper
+go get github.com/spf13/viper
 ```

+
 ## What is Viper?

 Viper is a complete configuration solution for Go applications including 12-Factor apps. It is designed
@@ -35,8 +44,8 @@ and formats. It supports:
 * reading from buffer
 * setting explicit values

-Viper can be thought of as a registry for all of your applications
-configuration needs.
+Viper can be thought of as a registry for all of your applications configuration needs.
+

 ## Why Viper?

@@ -46,34 +55,31 @@ Viper is here to help with that.

 Viper does the following for you:

-1. Find, load, and unmarshal a configuration file in JSON, TOML, YAML, HCL, envfile or Java properties formats.
-2. Provide a mechanism to set default values for your different
-   configuration options.
-3. Provide a mechanism to set override values for options specified through
-   command line flags.
-4. Provide an alias system to easily rename parameters without breaking existing
-   code.
-5. Make it easy to tell the difference between when a user has provided a
-   command line or config file which is the same as the default.
+1. Find, load, and unmarshal a configuration file in JSON, TOML, YAML, HCL, INI, envfile or Java properties formats.
+2. Provide a mechanism to set default values for your different configuration options.
+3. Provide a mechanism to set override values for options specified through command line flags.
+4. Provide an alias system to easily rename parameters without breaking existing code.
+5. Make it easy to tell the difference between when a user has provided a command line or config file which is the same as the default.

-Viper uses the following precedence order. Each item takes precedence over the
-item below it:
+Viper uses the following precedence order. Each item takes precedence over the item below it:

- * explicit call to Set
+ * explicit call to `Set`
 * flag
 * env
 * config
 * key/value store
 * default

-Viper configuration keys are case insensitive.
+**Important:** Viper configuration keys are case insensitive.
+There are ongoing discussions about making that optional.
+

 ## Putting Values into Viper

 ### Establishing Defaults

 A good configuration system will support default values. A default value is not
-required for a key, but it’s useful in the event that a key hasn’t been set via
+required for a key, but it’s useful in the event that a key hasn't been set via
 config file, environment variable, remote configuration or flag.

 Examples:
@@ -87,7 +93,7 @@ viper.SetDefault("Taxonomies", map[string]string{"tag": "tags", "category": "cat
 ### Reading Config Files

 Viper requires minimal configuration so it knows where to look for config files.
-Viper supports JSON, TOML, YAML, HCL, envfile and Java Properties files. Viper can search multiple paths, but
+Viper supports JSON, TOML, YAML, HCL, INI, envfile and Java Properties files. Viper can search multiple paths, but
 currently a single Viper instance only supports a single configuration file.
 Viper does not default to any configuration search paths leaving defaults decision
 to an application.
@@ -98,6 +104,7 @@ where a configuration file is expected.

 ```go
 viper.SetConfigName("config") // name of config file (without extension)
+viper.SetConfigType("yaml") // REQUIRED if the config file does not have the extension in the name
 viper.AddConfigPath("/etc/appname/")   // path to look for the config file in
 viper.AddConfigPath("$HOME/.appname")  // call multiple times to add many search paths
 viper.AddConfigPath(".")               // optionally look for config in the working directory
@@ -121,6 +128,8 @@ if err := viper.ReadInConfig(); err != nil {
 // Config file found and successfully parsed
 ```

+*NOTE [since 1.6]:* You can also have a file without an extension and specify the format programmaticaly. For those configuration files that lie in the home of the user without any extension like `.bashrc`
+
 ### Writing Config Files

 Reading from config files is useful, but at times you want to store all modifications made at run time.
@@ -258,6 +267,9 @@ keys to an extent. This is useful if you want to use `-` or something in your
 `Get()` calls, but want your environmental variables to use `_` delimiters. An
 example of using it can be found in `viper_test.go`.

+Alternatively, you can use `EnvKeyReplacer` with `NewWithOptions` factory function.
+Unlike `SetEnvKeyReplacer`, it accepts a `StringReplacer` interface allowing you to write custom string replacing logic.
+
 By default empty environment variables are considered unset and will fall back to
 the next configuration source. To treat empty environment variables as set, use
 the `AllowEmptyEnv` method.
@@ -391,7 +403,7 @@ 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.
@@ -403,7 +415,7 @@ 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
 ```

@@ -426,7 +438,7 @@ 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
@@ -445,6 +457,16 @@ 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
@@ -658,18 +680,75 @@ if err != nil {
 }
 ```

+If you want to unmarshal configuration where the keys themselves contain dot (the default key delimiter),
+you have to change the delimiter:
+
+```go
+v := viper.NewWithOptions(viper.KeyDelimiter("::"))
+
+v.SetDefault("chart::values", map[string]interface{}{
+    "ingress": map[string]interface{}{
+        "annotations": map[string]interface{}{
+            "traefik.frontend.rule.type":                 "PathPrefix",
+            "traefik.ingress.kubernetes.io/ssl-redirect": "true",
+        },
+    },
+})
+
+type config struct {
+	Chart struct{
+        Values map[string]interface{}
+    }
+}
+
+var C config
+
+v.Unmarshal(&C)
+```
+
+Viper also supports unmarshaling into embedded structs:
+
+```go
+/*
+Example config:
+
+module:
+    enabled: true
+    token: 89h3f98hbwf987h3f98wenf89ehf
+*/
+type config struct {
+	Module struct {
+		Enabled bool
+
+		moduleConfig `mapstructure:",squash"`
+	}
+}
+
+// moduleConfig could be in a module specific package
+type moduleConfig struct {
+	Token string
+}
+
+var C config
+
+err := viper.Unmarshal(&C)
+if err != nil {
+	t.Fatalf("unable to decode into struct, %v", err)
+}
+```
+
 Viper uses [github.com/mitchellh/mapstructure](https://github.com/mitchellh/mapstructure) under the hood for unmarshaling values which uses `mapstructure` tags by default.

 ### 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()
@@ -715,13 +794,6 @@ different vipers.

 ## Q & A

-Q: Why not INI files?
-
-A: Ini files are pretty awful. There’s no standard format, and they are hard to
-validate. Viper is designed to work with JSON, TOML or YAML files. If someone
-really wants to add this feature, I’d be happy to merge it. It’s easy to specify
-which formats your application will permit.
-
 Q: Why is it called “Viper”?

 A: Viper is designed to be a [companion](http://en.wikipedia.org/wiki/Viper_(G.I._Joe))
@@ -3,18 +3,15 @@ module github.com/spf13/viper
 go 1.12

 require (
-	github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6 // indirect
+	github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c
 	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/gorilla/websocket v1.4.2 // 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
@@ -24,23 +21,20 @@ require (
 	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/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/stretchr/testify v1.3.0
 	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
 )
@@ -1,35 +1,62 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+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 h1:AVXDdKsrtX33oR9fbCMu/+c1o8Ofjq6Ku/MInaLVg5Y=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1 h1:hL+ycaJpVE9M7nLoiXb/Pn10ENE2u+oddxbD8uu0ZVU=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0 h1:Kt+gOPPp2LEPWp8CSfxhsM8ik9CcyE/gYu+0r+RnZvM=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0 h1:9x7Bx0A9R5/M9jibeJeZWqjeVEIxYW9fZYqB9a70/bY=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1 h1:W9tAK3E57P75u0XLLR82LZyw8VpAnhmyTOxW9qzmyj8=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0 h1:VV2nUM3wwLLGh9lSABFgZMjInyUbJeaRSE64WuAIQ+4=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
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@@ -73,18 +155,39 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
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@@ -99,8 +202,16 @@ github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084 h1:sofwID9zm4tzr
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@@ -112,21 +223,23 @@ github.com/spf13/jwalterweatherman v1.0.0 h1:XHEdyB+EcvlqZamSM4ZOMGlc93t6AcsBEu9
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@@ -134,47 +247,142 @@ go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/
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-google.golang.org/grpc v1.21.0 h1:G+97AoqBnmZIT91cLG/EkCoK9NSelj64P8bOHHNmGn0=
-google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
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 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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+honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
@@ -12,7 +12,8 @@ import (
 	"os"

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

 type remoteConfigProvider struct{}
@@ -63,9 +64,7 @@ func (rc remoteConfigProvider) WatchChannel(rp viper.RemoteProvider) (<-chan *vi
 					Error: resp.Error,
 					Value: resp.Value,
 				}
-
 			}
-
 		}
 	}(cryptoResponseCh, viperResponsCh, quitwc, quit)

@@ -83,15 +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()})
 		}
 	}
@@ -114,11 +114,11 @@ func absPathify(inPath string) string {
 	return ""
 }

-// Check if File / Directory Exists
+// Check if file Exists
 func exists(fs afero.Fs, path string) (bool, error) {
-	_, err := fs.Stat(path)
+	stat, err := fs.Stat(path)
 	if err == nil {
-		return true, nil
+		return !stat.IsDir(), nil
 	}
 	if os.IsNotExist(err) {
 		return false, nil
@@ -23,6 +23,7 @@ import (
 	"bytes"
 	"encoding/csv"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"log"
@@ -33,19 +34,19 @@ import (
 	"sync"
 	"time"

-	yaml "gopkg.in/yaml.v2"
-
 	"github.com/fsnotify/fsnotify"
 	"github.com/hashicorp/hcl"
 	"github.com/hashicorp/hcl/hcl/printer"
 	"github.com/magiconair/properties"
 	"github.com/mitchellh/mapstructure"
-	toml "github.com/pelletier/go-toml"
+	"github.com/pelletier/go-toml"
 	"github.com/spf13/afero"
 	"github.com/spf13/cast"
 	jww "github.com/spf13/jwalterweatherman"
 	"github.com/spf13/pflag"
 	"github.com/subosito/gotenv"
+	"gopkg.in/ini.v1"
+	"gopkg.in/yaml.v2"
 )

 // ConfigMarshalError happens when failing to marshal the configuration.
@@ -115,6 +116,14 @@ func (fnfe ConfigFileNotFoundError) Error() string {
 	return fmt.Sprintf("Config File %q Not Found in %q", fnfe.name, fnfe.locations)
 }

+// ConfigFileAlreadyExistsError denotes failure to write new configuration file.
+type ConfigFileAlreadyExistsError string
+
+// Error returns the formatted error when configuration already exists.
+func (faee ConfigFileAlreadyExistsError) Error() string {
+	return fmt.Sprintf("Config File %q Already Exists", string(faee))
+}
+
 // A DecoderConfigOption can be passed to viper.Unmarshal to configure
 // mapstructure.DecoderConfig options
 type DecoderConfigOption func(*mapstructure.DecoderConfig)
@@ -188,7 +197,7 @@ type Viper struct {
 	envPrefix         string

 	automaticEnvApplied bool
-	envKeyReplacer      *strings.Replacer
+	envKeyReplacer      StringReplacer
 	allowEmptyEnv       bool

 	config         map[string]interface{}
@@ -226,13 +235,59 @@ func New() *Viper {
 	return v
 }

+// Option configures Viper using the functional options paradigm popularized by Rob Pike and Dave Cheney.
+// If you're unfamiliar with this style,
+// see https://commandcenter.blogspot.com/2014/01/self-referential-functions-and-design.html and
+// https://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis.
+type Option interface {
+	apply(v *Viper)
+}
+
+type optionFunc func(v *Viper)
+
+func (fn optionFunc) apply(v *Viper) {
+	fn(v)
+}
+
+// KeyDelimiter sets the delimiter used for determining key parts.
+// By default it's value is ".".
+func KeyDelimiter(d string) Option {
+	return optionFunc(func(v *Viper) {
+		v.keyDelim = d
+	})
+}
+
+// StringReplacer applies a set of replacements to a string.
+type StringReplacer interface {
+	// Replace returns a copy of s with all replacements performed.
+	Replace(s string) string
+}
+
+// EnvKeyReplacer sets a replacer used for mapping environment variables to internal keys.
+func EnvKeyReplacer(r StringReplacer) Option {
+	return optionFunc(func(v *Viper) {
+		v.envKeyReplacer = r
+	})
+}
+
+// NewWithOptions creates a new Viper instance.
+func NewWithOptions(opts ...Option) *Viper {
+	v := New()
+
+	for _, opt := range opts {
+		opt.apply(v)
+	}
+
+	return v
+}
+
 // Reset is intended for testing, will reset all to default settings.
 // In the public interface for the viper package so applications
 // can use it in their testing as well.
 func Reset() {
 	v = New()
-	SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl", "dotenv", "env"}
-	SupportedRemoteProviders = []string{"etcd", "consul"}
+	SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl", "dotenv", "env", "ini"}
+	SupportedRemoteProviders = []string{"etcd", "consul", "firestore"}
 }

 type defaultRemoteProvider struct {
@@ -270,10 +325,10 @@ type RemoteProvider interface {
 }

 // SupportedExts are universally supported extensions.
-var SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl", "dotenv", "env"}
+var SupportedExts = []string{"json", "toml", "yaml", "yml", "properties", "props", "prop", "hcl", "dotenv", "env", "ini"}

 // SupportedRemoteProviders are universally supported remote providers.
-var SupportedRemoteProviders = []string{"etcd", "consul"}
+var SupportedRemoteProviders = []string{"etcd", "consul", "firestore"}

 func OnConfigChange(run func(in fsnotify.Event)) { v.OnConfigChange(run) }
 func (v *Viper) OnConfigChange(run func(in fsnotify.Event)) {
@@ -422,7 +477,7 @@ func (v *Viper) AddConfigPath(in string) {

 // AddRemoteProvider adds a remote configuration source.
 // Remote Providers are searched in the order they are added.
-// provider is a string value, "etcd" or "consul" are currently supported.
+// provider is a string value: "etcd", "consul" or "firestore" are currently supported.
 // endpoint is the url.  etcd requires http://ip:port  consul requires ip:port
 // path is the path in the k/v store to retrieve configuration
 // To retrieve a config file called myapp.json from /configs/myapp.json
@@ -451,14 +506,14 @@ func (v *Viper) AddRemoteProvider(provider, endpoint, path string) error {

 // AddSecureRemoteProvider adds a remote configuration source.
 // Secure Remote Providers are searched in the order they are added.
-// provider is a string value, "etcd" or "consul" are currently supported.
+// provider is a string value: "etcd", "consul" or "firestore" are currently supported.
 // endpoint is the url.  etcd requires http://ip:port  consul requires ip:port
 // secretkeyring is the filepath to your openpgp secret keyring.  e.g. /etc/secrets/myring.gpg
 // path is the path in the k/v store to retrieve configuration
 // To retrieve a config file called myapp.json from /configs/myapp.json
 // you should set path to /configs and set config name (SetConfigName()) to
 // "myapp"
-// Secure Remote Providers are implemented with github.com/xordataexchange/crypt
+// Secure Remote Providers are implemented with github.com/bketelsen/crypt
 func AddSecureRemoteProvider(provider, endpoint, path, secretkeyring string) error {
 	return v.AddSecureRemoteProvider(provider, endpoint, path, secretkeyring)
 }
@@ -670,7 +725,7 @@ func GetViper() *Viper {
 func Get(key string) interface{} { return v.Get(key) }
 func (v *Viper) Get(key string) interface{} {
 	lcaseKey := strings.ToLower(key)
-	val := v.find(lcaseKey)
+	val := v.find(lcaseKey, true)
 	if val == nil {
 		return nil
 	}
@@ -894,8 +949,11 @@ func decode(input interface{}, config *mapstructure.DecoderConfig) error {

 // UnmarshalExact unmarshals the config into a Struct, erroring if a field is nonexistent
 // in the destination struct.
-func (v *Viper) UnmarshalExact(rawVal interface{}) error {
-	config := defaultDecoderConfig(rawVal)
+func UnmarshalExact(rawVal interface{}, opts ...DecoderConfigOption) error {
+	return v.UnmarshalExact(rawVal, opts...)
+}
+func (v *Viper) UnmarshalExact(rawVal interface{}, opts ...DecoderConfigOption) error {
+	config := defaultDecoderConfig(rawVal, opts...)
 	config.ErrorUnused = true

 	err := decode(v.AllSettings(), config)
@@ -938,11 +996,6 @@ func (v *Viper) BindFlagValues(flags FlagValueSet) (err error) {
 }

 // BindFlagValue binds a specific key to a FlagValue.
-// Example (where serverCmd is a Cobra instance):
-//
-//	 serverCmd.Flags().Int("port", 1138, "Port to run Application server on")
-//	 Viper.BindFlagValue("port", serverCmd.Flags().Lookup("port"))
-//
 func BindFlagValue(key string, flag FlagValue) error { return v.BindFlagValue(key, flag) }
 func (v *Viper) BindFlagValue(key string, flag FlagValue) error {
 	if flag == nil {
@@ -960,7 +1013,7 @@ func BindEnv(input ...string) error { return v.BindEnv(input...) }
 func (v *Viper) BindEnv(input ...string) error {
 	var key, envkey string
 	if len(input) == 0 {
-		return fmt.Errorf("BindEnv missing key to bind to")
+		return fmt.Errorf("missing key to bind to")
 	}

 	key = strings.ToLower(input[0])
@@ -977,12 +1030,15 @@ func (v *Viper) BindEnv(input ...string) error {
 }

 // Given a key, find the value.
-// Viper will check in the following order:
-// flag, env, config file, key/value store, default.
+//
 // Viper will check to see if an alias exists first.
+// Viper will then check in the following order:
+// flag, env, config file, key/value store.
+// Lastly, if no value was found and flagDefault is true, and if the key
+// corresponds to a flag, the flag's default value is returned.
+//
 // Note: this assumes a lower-cased key given.
-func (v *Viper) find(lcaseKey string) interface{} {
-
+func (v *Viper) find(lcaseKey string, flagDefault bool) interface{} {
 	var (
 		val    interface{}
 		exists bool
@@ -1027,6 +1083,8 @@ func (v *Viper) find(lcaseKey string) interface{} {
 			s = strings.TrimSuffix(s, "]")
 			res, _ := readAsCSV(s)
 			return cast.ToIntSlice(res)
+		case "stringToString":
+			return stringToStringConv(flag.ValueString())
 		default:
 			return flag.ValueString()
 		}
@@ -1083,29 +1141,33 @@ func (v *Viper) find(lcaseKey string) interface{} {
 		return nil
 	}

-	// last chance: if no other value is returned and a flag does exist for the value,
-	// get the flag's value even if the flag's value has not changed
-	if flag, exists := v.pflags[lcaseKey]; exists {
-		switch flag.ValueType() {
-		case "int", "int8", "int16", "int32", "int64":
-			return cast.ToInt(flag.ValueString())
-		case "bool":
-			return cast.ToBool(flag.ValueString())
-		case "stringSlice":
-			s := strings.TrimPrefix(flag.ValueString(), "[")
-			s = strings.TrimSuffix(s, "]")
-			res, _ := readAsCSV(s)
-			return res
-		case "intSlice":
-			s := strings.TrimPrefix(flag.ValueString(), "[")
-			s = strings.TrimSuffix(s, "]")
-			res, _ := readAsCSV(s)
-			return cast.ToIntSlice(res)
-		default:
-			return flag.ValueString()
+	if flagDefault {
+		// last chance: if no value is found and a flag does exist for the key,
+		// get the flag's default value even if the flag's value has not been set.
+		if flag, exists := v.pflags[lcaseKey]; exists {
+			switch flag.ValueType() {
+			case "int", "int8", "int16", "int32", "int64":
+				return cast.ToInt(flag.ValueString())
+			case "bool":
+				return cast.ToBool(flag.ValueString())
+			case "stringSlice":
+				s := strings.TrimPrefix(flag.ValueString(), "[")
+				s = strings.TrimSuffix(s, "]")
+				res, _ := readAsCSV(s)
+				return res
+			case "intSlice":
+				s := strings.TrimPrefix(flag.ValueString(), "[")
+				s = strings.TrimSuffix(s, "]")
+				res, _ := readAsCSV(s)
+				return cast.ToIntSlice(res)
+			case "stringToString":
+				return stringToStringConv(flag.ValueString())
+			default:
+				return flag.ValueString()
+			}
 		}
+		// last item, no need to check shadowing
 	}
-	// last item, no need to check shadowing

 	return nil
 }
@@ -1119,12 +1181,36 @@ func readAsCSV(val string) ([]string, error) {
 	return csvReader.Read()
 }

+// mostly copied from pflag's implementation of this operation here https://github.com/spf13/pflag/blob/master/string_to_string.go#L79
+// alterations are: errors are swallowed, map[string]interface{} is returned in order to enable cast.ToStringMap
+func stringToStringConv(val string) interface{} {
+	val = strings.Trim(val, "[]")
+	// An empty string would cause an empty map
+	if len(val) == 0 {
+		return map[string]interface{}{}
+	}
+	r := csv.NewReader(strings.NewReader(val))
+	ss, err := r.Read()
+	if err != nil {
+		return nil
+	}
+	out := make(map[string]interface{}, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return nil
+		}
+		out[kv[0]] = kv[1]
+	}
+	return out
+}
+
 // IsSet checks to see if the key has been set in any of the data locations.
 // IsSet is case-insensitive for a key.
 func IsSet(key string) bool { return v.IsSet(key) }
 func (v *Viper) IsSet(key string) bool {
 	lcaseKey := strings.ToLower(key)
-	val := v.find(lcaseKey)
+	val := v.find(lcaseKey, false)
 	return val != nil
 }

@@ -1331,11 +1417,10 @@ func (v *Viper) WriteConfig() error {
 // SafeWriteConfig writes current configuration to file only if the file does not exist.
 func SafeWriteConfig() error { return v.SafeWriteConfig() }
 func (v *Viper) SafeWriteConfig() error {
-	filename, err := v.getConfigFile()
-	if err != nil {
-		return err
+	if len(v.configPaths) < 1 {
+		return errors.New("missing configuration for 'configPath'")
 	}
-	return v.writeConfig(filename, false)
+	return v.SafeWriteConfigAs(filepath.Join(v.configPaths[0], v.configName+"."+v.configType))
 }

 // WriteConfigAs writes current configuration to a given filename.
@@ -1347,17 +1432,27 @@ func (v *Viper) WriteConfigAs(filename string) error {
 // SafeWriteConfigAs writes current configuration to a given filename if it does not exist.
 func SafeWriteConfigAs(filename string) error { return v.SafeWriteConfigAs(filename) }
 func (v *Viper) SafeWriteConfigAs(filename string) error {
+	alreadyExists, err := afero.Exists(v.fs, filename)
+	if alreadyExists && err == nil {
+		return ConfigFileAlreadyExistsError(filename)
+	}
 	return v.writeConfig(filename, false)
 }

-func writeConfig(filename string, force bool) error { return v.writeConfig(filename, force) }
 func (v *Viper) writeConfig(filename string, force bool) error {
 	jww.INFO.Println("Attempting to write configuration to file.")
+	var configType string
+
 	ext := filepath.Ext(filename)
-	if len(ext) <= 1 {
-		return fmt.Errorf("Filename: %s requires valid extension.", filename)
+	if ext != "" {
+		configType = ext[1:]
+	} else {
+		configType = v.configType
 	}
-	configType := ext[1:]
+	if configType == "" {
+		return fmt.Errorf("config type could not be determined for %s", filename)
+	}
+
 	if !stringInSlice(configType, SupportedExts) {
 		return UnsupportedConfigError(configType)
 	}
@@ -1444,6 +1539,23 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 			// set innermost value
 			deepestMap[lastKey] = value
 		}
+
+	case "ini":
+		cfg := ini.Empty()
+		err := cfg.Append(buf.Bytes())
+		if err != nil {
+			return ConfigParseError{err}
+		}
+		sections := cfg.Sections()
+		for i := 0; i < len(sections); i++ {
+			section := sections[i]
+			keys := section.Keys()
+			for j := 0; j < len(keys); j++ {
+				key := keys[j]
+				value := cfg.Section(section.Name()).Key(key.Name()).String()
+				c[section.Name()+"."+key.Name()] = value
+			}
+		}
 	}

 	insensitiviseMap(c)
@@ -1451,9 +1563,6 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 }

 // Marshal a map into Writer.
-func marshalWriter(f afero.File, configType string) error {
-	return v.marshalWriter(f, configType)
-}
 func (v *Viper) marshalWriter(f afero.File, configType string) error {
 	c := v.AllSettings()
 	switch configType {
@@ -1527,6 +1636,22 @@ func (v *Viper) marshalWriter(f afero.File, configType string) error {
 		if _, err = f.WriteString(string(b)); err != nil {
 			return ConfigMarshalError{err}
 		}
+
+	case "ini":
+		keys := v.AllKeys()
+		cfg := ini.Empty()
+		ini.PrettyFormat = false
+		for i := 0; i < len(keys); i++ {
+			key := keys[i]
+			lastSep := strings.LastIndex(key, ".")
+			sectionName := key[:(lastSep)]
+			keyName := key[(lastSep + 1):]
+			if sectionName == "default" {
+				sectionName = ""
+			}
+			cfg.Section(sectionName).Key(keyName).SetValue(v.Get(key).(string))
+		}
+		cfg.WriteTo(f)
 	}
 	return nil
 }
@@ -1673,7 +1798,7 @@ func (v *Viper) getRemoteConfig(provider RemoteProvider) (map[string]interface{}
 func (v *Viper) watchKeyValueConfigOnChannel() error {
 	for _, rp := range v.remoteProviders {
 		respc, _ := RemoteConfig.WatchChannel(rp)
-		//Todo: Add quit channel
+		// Todo: Add quit channel
 		go func(rc <-chan *RemoteResponse) {
 			for {
 				b := <-rc
@@ -1709,7 +1834,7 @@ func (v *Viper) watchRemoteConfig(provider RemoteProvider) (map[string]interface
 }

 // AllKeys returns all keys holding a value, regardless of where they are set.
-// Nested keys are returned with a v.keyDelim (= ".") separator
+// Nested keys are returned with a v.keyDelim separator
 func AllKeys() []string { return v.AllKeys() }
 func (v *Viper) AllKeys() []string {
 	m := map[string]bool{}
@@ -1732,7 +1857,7 @@ func (v *Viper) AllKeys() []string {

 // flattenAndMergeMap recursively flattens the given map into a map[string]bool
 // of key paths (used as a set, easier to manipulate than a []string):
-// - each path is merged into a single key string, delimited with v.keyDelim (= ".")
+// - each path is merged into a single key string, delimited with v.keyDelim
 // - if a path is shadowed by an earlier value in the initial shadow map,
 //   it is skipped.
 // The resulting set of paths is merged to the given shadow set at the same time.
@@ -1881,6 +2006,12 @@ func (v *Viper) searchInPath(in string) (filename string) {
 		}
 	}

+	if v.configType != "" {
+		if b, _ := exists(v.fs, filepath.Join(in, v.configName)); b {
+			return filepath.Join(in, v.configName)
+		}
+	}
+
 	return ""
 }

@@ -118,6 +118,24 @@ var remoteExample = []byte(`{
 "newkey":"remote"
 }`)

+var iniExample = []byte(`; Package name
+NAME        = ini
+; Package version
+VERSION     = v1
+; Package import path
+IMPORT_PATH = gopkg.in/%(NAME)s.%(VERSION)s
+
+# Information about package author
+# Bio can be written in multiple lines.
+[author]
+NAME   = Unknown  ; Succeeding comment
+E-MAIL = fake@localhost
+GITHUB = https://github.com/%(NAME)s
+BIO    = """Gopher.
+Coding addict.
+Good man.
+"""  # Succeeding comment`)
+
 func initConfigs() {
 	Reset()
 	var r io.Reader
@@ -148,6 +166,10 @@ func initConfigs() {
 	SetConfigType("json")
 	remote := bytes.NewReader(remoteExample)
 	unmarshalReader(remote, v.kvstore)
+
+	SetConfigType("ini")
+	r = bytes.NewReader(iniExample)
+	unmarshalReader(r, v.config)
 }

 func initConfig(typ, config string) {
@@ -204,9 +226,16 @@ func initHcl() {
 	unmarshalReader(r, v.config)
 }

+func initIni() {
+	Reset()
+	SetConfigType("ini")
+	r := bytes.NewReader(iniExample)
+
+	unmarshalReader(r, v.config)
+}
+
 // make directories for testing
 func initDirs(t *testing.T) (string, string, func()) {
-
 	var (
 		testDirs = []string{`a a`, `b`, `C_`}
 		config   = `improbable`
@@ -278,6 +307,60 @@ func TestBasics(t *testing.T) {
 	assert.NoError(t, err)
 }

+func TestSearchInPath_WithoutConfigTypeSet(t *testing.T) {
+	filename := ".dotfilenoext"
+	path := "/tmp"
+	file := filepath.Join(path, filename)
+	SetConfigName(filename)
+	AddConfigPath(path)
+	_, createErr := v.fs.Create(file)
+	defer func() {
+		_ = v.fs.Remove(file)
+	}()
+	assert.NoError(t, createErr)
+	_, err := v.getConfigFile()
+	// unless config type is set, files without extension
+	// are not considered
+	assert.Error(t, err)
+}
+
+func TestSearchInPath(t *testing.T) {
+	filename := ".dotfilenoext"
+	path := "/tmp"
+	file := filepath.Join(path, filename)
+	SetConfigName(filename)
+	SetConfigType("yaml")
+	AddConfigPath(path)
+	_, createErr := v.fs.Create(file)
+	defer func() {
+		_ = v.fs.Remove(file)
+	}()
+	assert.NoError(t, createErr)
+	filename, err := v.getConfigFile()
+	assert.Equal(t, file, filename)
+	assert.NoError(t, err)
+}
+
+func TestSearchInPath_FilesOnly(t *testing.T) {
+	fs := afero.NewMemMapFs()
+
+	err := fs.Mkdir("/tmp/config", 0777)
+	require.NoError(t, err)
+
+	_, err = fs.Create("/tmp/config/config.yaml")
+	require.NoError(t, err)
+
+	v := New()
+
+	v.SetFs(fs)
+	v.AddConfigPath("/tmp")
+	v.AddConfigPath("/tmp/config")
+
+	filename, err := v.getConfigFile()
+	assert.Equal(t, "/tmp/config/config.yaml", filename)
+	assert.NoError(t, err)
+}
+
 func TestDefault(t *testing.T) {
 	SetDefault("age", 45)
 	assert.Equal(t, 45, Get("age"))
@@ -380,6 +463,11 @@ func TestHCL(t *testing.T) {
 	assert.NotEqual(t, "cronut", Get("type"))
 }

+func TestIni(t *testing.T) {
+	initIni()
+	assert.Equal(t, "ini", Get("default.name"))
+}
+
 func TestRemotePrecedence(t *testing.T) {
 	initJSON()

@@ -412,7 +500,6 @@ func TestEnv(t *testing.T) {
 	AutomaticEnv()

 	assert.Equal(t, "crunk", Get("name"))
-
 }

 func TestEmptyEnv(t *testing.T) {
@@ -500,11 +587,24 @@ func TestSetEnvKeyReplacer(t *testing.T) {
 	assert.Equal(t, "30s", Get("refresh-interval"))
 }

+func TestEnvKeyReplacer(t *testing.T) {
+	v := NewWithOptions(EnvKeyReplacer(strings.NewReplacer("-", "_")))
+
+	v.AutomaticEnv()
+	_ = os.Setenv("REFRESH_INTERVAL", "30s")
+
+	assert.Equal(t, "30s", v.Get("refresh-interval"))
+}
+
 func TestAllKeys(t *testing.T) {
 	initConfigs()

 	ks := sort.StringSlice{
 		"title",
+		"author.bio",
+		"author.e-mail",
+		"author.github",
+		"author.name",
 		"newkey",
 		"owner.organization",
 		"owner.dob",
@@ -516,6 +616,9 @@ func TestAllKeys(t *testing.T) {
 		"hobbies",
 		"clothing.jacket",
 		"clothing.trousers",
+		"default.import_path",
+		"default.name",
+		"default.version",
 		"clothing.pants.size",
 		"age",
 		"hacker",
@@ -540,13 +643,24 @@ func TestAllKeys(t *testing.T) {
 			"dob":          dob,
 		},
 		"title": "TOML Example",
-		"ppu":   0.55,
-		"eyes":  "brown",
+		"author": map[string]interface{}{
+			"e-mail": "fake@localhost",
+			"github": "https://github.com/Unknown",
+			"name":   "Unknown",
+			"bio":    "Gopher.\nCoding addict.\nGood man.\n",
+		},
+		"ppu":  0.55,
+		"eyes": "brown",
 		"clothing": map[string]interface{}{
 			"trousers": "denim",
 			"jacket":   "leather",
 			"pants":    map[string]interface{}{"size": "large"},
 		},
+		"default": map[string]interface{}{
+			"import_path": "gopkg.in/ini.v1",
+			"name":        "ini",
+			"version":     "v1",
+		},
 		"id": "0001",
 		"batters": map[string]interface{}{
 			"batter": []interface{}{
@@ -743,7 +857,6 @@ func TestBindPFlags(t *testing.T) {
 	for name, expected := range mutatedTestValues {
 		assert.Equal(t, expected, v.Get(name))
 	}
-
 }

 func TestBindPFlagsStringSlice(t *testing.T) {
@@ -855,7 +968,53 @@ func TestBindPFlag(t *testing.T) {
 	flag.Changed = true // hack for pflag usage

 	assert.Equal(t, "testing_mutate", Get("testvalue"))
+}

+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) {
@@ -877,7 +1036,6 @@ func TestBoundCaseSensitivity(t *testing.T) {

 	BindPFlag("eYEs", flag)
 	assert.Equal(t, "green", Get("eyes"))
-
 }

 func TestSizeInBytes(t *testing.T) {
@@ -980,18 +1138,18 @@ func TestFindsNestedKeys(t *testing.T) {
 		"owner.dob":           dob,
 		"beard":               true,
 		"foos": []map[string]interface{}{
-			map[string]interface{}{
+			{
 				"foo": []map[string]interface{}{
-					map[string]interface{}{
+					{
 						"key": 1,
 					},
-					map[string]interface{}{
+					{
 						"key": 2,
 					},
-					map[string]interface{}{
+					{
 						"key": 3,
 					},
-					map[string]interface{}{
+					{
 						"key": 4,
 					},
 				},
@@ -1000,10 +1158,8 @@ func TestFindsNestedKeys(t *testing.T) {
 	}

 	for key, expectedValue := range expected {
-
 		assert.Equal(t, expectedValue, v.Get(key))
 	}
-
 }

 func TestReadBufConfig(t *testing.T) {
@@ -1023,16 +1179,50 @@ func TestReadBufConfig(t *testing.T) {
 func TestIsSet(t *testing.T) {
 	v := New()
 	v.SetConfigType("yaml")
+
+	/* config and defaults */
 	v.ReadConfig(bytes.NewBuffer(yamlExample))
+	v.SetDefault("clothing.shoes", "sneakers")
+
+	assert.True(t, v.IsSet("clothing"))
 	assert.True(t, v.IsSet("clothing.jacket"))
 	assert.False(t, v.IsSet("clothing.jackets"))
+	assert.True(t, v.IsSet("clothing.shoes"))
+
+	/* state change */
 	assert.False(t, v.IsSet("helloworld"))
 	v.Set("helloworld", "fubar")
 	assert.True(t, v.IsSet("helloworld"))
+
+	/* env */
+	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+	v.BindEnv("eyes")
+	v.BindEnv("foo")
+	v.BindEnv("clothing.hat")
+	v.BindEnv("clothing.hats")
+	os.Setenv("FOO", "bar")
+	os.Setenv("CLOTHING_HAT", "bowler")
+
+	assert.True(t, v.IsSet("eyes"))           // in the config file
+	assert.True(t, v.IsSet("foo"))            // in the environment
+	assert.True(t, v.IsSet("clothing.hat"))   // in the environment
+	assert.False(t, v.IsSet("clothing.hats")) // not defined
+
+	/* flags */
+	flagset := pflag.NewFlagSet("testisset", pflag.ContinueOnError)
+	flagset.Bool("foobaz", false, "foobaz")
+	flagset.Bool("barbaz", false, "barbaz")
+	foobaz, barbaz := flagset.Lookup("foobaz"), flagset.Lookup("barbaz")
+	v.BindPFlag("foobaz", foobaz)
+	v.BindPFlag("barbaz", barbaz)
+	barbaz.Value.Set("true")
+	barbaz.Changed = true // hack for pflag usage
+
+	assert.False(t, v.IsSet("foobaz"))
+	assert.True(t, v.IsSet("barbaz"))
 }

 func TestDirsSearch(t *testing.T) {
-
 	root, config, cleanup := initDirs(t)
 	defer cleanup()

@@ -1055,7 +1245,6 @@ func TestDirsSearch(t *testing.T) {
 }

 func TestWrongDirsSearchNotFound(t *testing.T) {
-
 	_, config, cleanup := initDirs(t)
 	defer cleanup()

@@ -1075,7 +1264,6 @@ func TestWrongDirsSearchNotFound(t *testing.T) {
 }

 func TestWrongDirsSearchNotFoundForMerge(t *testing.T) {
-
 	_, config, cleanup := initDirs(t)
 	defer cleanup()

@@ -1138,26 +1326,6 @@ 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": [
@@ -1181,26 +1349,6 @@ 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
@@ -1208,95 +1356,6 @@ 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:
@@ -1313,24 +1372,299 @@ hobbies:
 name: steve
 `)

-func TestWriteConfigYAML(t *testing.T) {
+func TestWriteConfig(t *testing.T) {
+	fs := afero.NewMemMapFs()
+	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,
+		},
+	}
+	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)
+		})
+	}
+}
+
+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"))
+		})
+	}
+}
+
+func TestSafeWriteConfig(t *testing.T) {
+	v := New()
+	fs := afero.NewMemMapFs()
+	v.SetFs(fs)
+	v.AddConfigPath("/test")
+	v.SetConfigName("c")
+	v.SetConfigType("yaml")
+	require.NoError(t, v.ReadConfig(bytes.NewBuffer(yamlExample)))
+	require.NoError(t, v.SafeWriteConfig())
+	read, err := afero.ReadFile(fs, "/test/c.yaml")
+	require.NoError(t, err)
+	assert.Equal(t, yamlWriteExpected, read)
+}
+
+func TestSafeWriteConfigWithMissingConfigPath(t *testing.T) {
 	v := New()
 	fs := afero.NewMemMapFs()
 	v.SetFs(fs)
 	v.SetConfigName("c")
 	v.SetConfigType("yaml")
+	require.EqualError(t, v.SafeWriteConfig(), "missing configuration for 'configPath'")
+}
+
+func TestSafeWriteConfigWithExistingFile(t *testing.T) {
+	v := New()
+	fs := afero.NewMemMapFs()
+	fs.Create("/test/c.yaml")
+	v.SetFs(fs)
+	v.AddConfigPath("/test")
+	v.SetConfigName("c")
+	v.SetConfigType("yaml")
+	err := v.SafeWriteConfig()
+	require.Error(t, err)
+	_, ok := err.(ConfigFileAlreadyExistsError)
+	assert.True(t, ok, "Expected ConfigFileAlreadyExistsError")
+}
+
+func TestSafeWriteAsConfig(t *testing.T) {
+	v := New()
+	fs := afero.NewMemMapFs()
+	v.SetFs(fs)
 	err := v.ReadConfig(bytes.NewBuffer(yamlExample))
 	if err != nil {
 		t.Fatal(err)
 	}
-	if err := v.WriteConfigAs("c.yaml"); err != nil {
+	require.NoError(t, v.SafeWriteConfigAs("/test/c.yaml"))
+	if _, err = afero.ReadFile(fs, "/test/c.yaml"); err != nil {
 		t.Fatal(err)
 	}
-	read, err := afero.ReadFile(fs, "c.yaml")
-	if err != nil {
-		t.Fatal(err)
-	}
-	assert.Equal(t, yamlWriteExpected, read)
+}
+
+func TestSafeWriteConfigAsWithExistingFile(t *testing.T) {
+	v := New()
+	fs := afero.NewMemMapFs()
+	fs.Create("/test/c.yaml")
+	v.SetFs(fs)
+	err := v.SafeWriteConfigAs("/test/c.yaml")
+	require.Error(t, err)
+	_, ok := err.(ConfigFileAlreadyExistsError)
+	assert.True(t, ok, "Expected ConfigFileAlreadyExistsError")
 }

 var yamlMergeExampleTgt = []byte(`
@@ -1513,7 +1847,6 @@ func TestMergeConfigMap(t *testing.T) {
 	}

 	assert(1234)
-
 }

 func TestUnmarshalingWithAliases(t *testing.T) {
@@ -1552,7 +1885,6 @@ func TestSetConfigNameClearsFileCache(t *testing.T) {
 }

 func TestShadowedNestedValue(t *testing.T) {
-
 	config := `name: steve
 clothing:
  jacket: leather
@@ -1732,7 +2064,6 @@ func doTestCaseInsensitive(t *testing.T, typ, config string) {
 	assert.Equal(t, 3, cast.ToInt(Get("ef.ijk")))
 	assert.Equal(t, 4, cast.ToInt(Get("ef.lm.no")))
 	assert.Equal(t, 5, cast.ToInt(Get("ef.lm.p.q")))
-
 }

 func newViperWithConfigFile(t *testing.T) (*Viper, string, func()) {
@@ -1837,7 +2168,6 @@ func TestWatchFile(t *testing.T) {
 		require.Nil(t, err)
 		assert.Equal(t, "baz", v.Get("foo"))
 	})
-
 }

 func TestUnmarshal_DotSeparatorBackwardCompatibility(t *testing.T) {
@@ -1857,6 +2187,73 @@ func TestUnmarshal_DotSeparatorBackwardCompatibility(t *testing.T) {
 	assert.Equal(t, "cobra_flag", config.Foo.Bar)
 }

+var yamlExampleWithDot = []byte(`Hacker: true
+name: steve
+hobbies:
+  - skateboarding
+  - snowboarding
+  - go
+clothing:
+  jacket: leather
+  trousers: denim
+  pants:
+    size: large
+age: 35
+eyes : brown
+beard: true
+emails:
+  steve@hacker.com:
+    created: 01/02/03
+    active: true
+`)
+
+func TestKeyDelimiter(t *testing.T) {
+	v := NewWithOptions(KeyDelimiter("::"))
+	v.SetConfigType("yaml")
+	r := strings.NewReader(string(yamlExampleWithDot))
+
+	err := v.unmarshalReader(r, v.config)
+	require.NoError(t, err)
+
+	values := map[string]interface{}{
+		"image": map[string]interface{}{
+			"repository": "someImage",
+			"tag":        "1.0.0",
+		},
+		"ingress": map[string]interface{}{
+			"annotations": map[string]interface{}{
+				"traefik.frontend.rule.type":                 "PathPrefix",
+				"traefik.ingress.kubernetes.io/ssl-redirect": "true",
+			},
+		},
+	}
+
+	v.SetDefault("charts::values", values)
+
+	assert.Equal(t, "leather", v.GetString("clothing::jacket"))
+	assert.Equal(t, "01/02/03", v.GetString("emails::steve@hacker.com::created"))
+
+	type config struct {
+		Charts struct {
+			Values map[string]interface{}
+		}
+	}
+
+	expected := config{
+		Charts: struct {
+			Values map[string]interface{}
+		}{
+			Values: values,
+		},
+	}
+
+	var actual config
+
+	assert.NoError(t, v.Unmarshal(&actual))
+
+	assert.Equal(t, expected, actual)
+}
+
 func BenchmarkGetBool(b *testing.B) {
 	key := "BenchmarkGetBool"
 	v = New()
Author	SHA1	Message	Date
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
Mark Sagi-Kazar	4525543ce4	Improve CI	2020-01-16 19:27:10 +01:00
Pedro SilvaandMárk Sági-Kazár	9cd571279d	Extensionless files only allowed when config type is set (#827 ) * Only consider files without extension if the config type is explicitly specified * Hides unused variable in test * First check for config type then for file without extension	2020-01-16 19:23:50 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	06ab5a4b62	Add documentation about unmarshaling into embedded structs	2020-01-08 10:58:26 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	eabbc68a3e	Fix file path lookup	2019-12-06 17:29:42 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	5ad4bc05cf	Add decoder opts to unmarshal exact	2019-12-06 14:27:22 +01:00
Gregory HaynesandMárk Sági-Kazár	bcb420b705	Add global UnmarshalExact method There is no helper method for UnmarshalExact which calls the corresponding method on the global viper instance.	2019-12-06 14:15:02 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	4ad4c8df70	Add string replacer interface and env key replacer option	2019-12-06 14:13:46 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	6fcf985c5a	Fix readme	2019-12-06 14:01:42 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	bdf2db0ff8	Fix goimports	2019-12-06 14:01:42 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	a842b8f618	Replace SetKeyDelimiter with functional options	2019-12-06 14:01:42 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	9a405be5c0	Add SetKeyDelimiter to the README	2019-12-06 14:01:42 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	a73303ee89	Add key delimiter setter	2019-12-06 14:01:42 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	b6ced70067	Generic improvements	2019-12-06 14:01:30 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	52836e66ad	Improve badges	2019-12-06 14:01:30 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	6895c083d6	INI is supported	2019-12-06 14:01:30 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	c4fedd192b	Fix check target	2019-12-06 13:00:52 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	2fd264d3d1	Fix misspell	2019-12-06 13:00:52 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	8b7fbcaa4b	Fix golint	2019-12-06 13:00:52 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	29bb3ee94f	Fix deadcode	2019-12-06 13:00:52 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	7b5adba788	Fix whitespace	2019-12-06 13:00:52 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	cea8b9dfcd	Fix goimports	2019-12-06 13:00:52 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	e316012b4d	Fix gofmt	2019-12-06 13:00:52 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	78a0e37a24	Add github actions workflow	2019-12-06 12:35:47 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	fae3a81867	Add ide integration	2019-12-06 12:10:03 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	d52c544291	Add Makefile	2019-12-06 12:10:03 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	abdeaff171	Add golangci config	2019-12-06 12:10:03 +01:00
Mark Sagi-KazarandMárk Sági-Kazár	8feab54f0e	Tidy dependencies	2019-12-06 11:22:37 +01:00
Matti RandMárk Sági-Kazár	351bfe9719	loop through ini sections pass tests write out ini file & tests go fmt Update viper_test.go fix test gofmt	2019-12-06 09:02:54 +01:00
javaduckyandMárk Sági-Kazár	3a19b6e0d9	Review updates to utilize afero for file checks and updated checks on unit tests	2019-12-06 08:36:52 +01:00
javaduckyandMárk Sági-Kazár	a708479794	Updating SafeWriteConfig and SafeWriteConfigAs to match documented behavior. Methods should throw an error if the config file already exists or if no configpath is configured when not explicitly requesting a write path.	2019-12-06 08:36:52 +01:00
Benoit MassonandMárk Sági-Kazár	9e353e395e	find() looks for flag's default values only when requested. Default value should be looked for by Get(), but not by IsSet(). This logic should remain inside find(), to make sure that shadowing of keys is handled properly. Fixes Issue #276.	2019-11-29 21:16:13 +01:00
Benoit MassonandMárk Sági-Kazár	4e1ebbdaba	Added tests to TestIsSet() Added tests for: - nested elements - environment values - flags (currently fails => IsSet() always returns true, due to the default value of the flag)	2019-11-29 21:16:13 +01:00
Kévin DunglasandMárk Sági-Kazár	01d7d76eb0	Add Mercure in the list of projects using Viper	2019-11-08 13:18:39 +01:00
Pedro SilvaandMárk Sági-Kazár	d1c60d9e69	Support config files with no extensions (#722 ) * Support config files with no extensions * Update README informing config files without extension are supported	2019-11-06 14:54:13 +01:00