Add a script to diff release jars with new release to do a quick check before approving the new release in maven central.

PiperOrigin-RevId: 360546122

util/diff-jars.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+while getopts o:n: flag
+do
+    case "${flag}" in
+        o) OLD_VERSION=${OPTARG};;
+        n) NEW_VERSION=${OPTARG};;
+    esac
+done
+
+BASE_URL=https://repo1.maven.org/maven2/com/google/inject
+REPO_DIR=$PWD
+
+# Downloading old versions from maven central
+mkdir -p /tmp/guice-jars
+cd /tmp/guice-jars
+
+echo "Old version: $OLD_VERSION, new version: $NEW_VERSION"
+
+echo "Downloading core..."
+wget $BASE_URL/guice/$OLD_VERSION/guice-$OLD_VERSION.jar
+
+echo "Diffing core..."
+pkgdiff  guice-$OLD_VERSION.jar $REPO_DIR/core/target/guice-$NEW_VERSION.jar &
+
+for EXT in assistedinject dagger-adapter grapher jmx jndi persist servlet spring struts2 testlib throwingproviders
+do
+    echo "Dowloading $EXT extension..."
+    wget $BASE_URL/extensions/guice-$EXT/$OLD_VERSION/guice-$EXT-$OLD_VERSION.jar
+    echo "Diffing $EXT..."
+    pkgdiff  guice-$EXT-$OLD_VERSION.jar $REPO_DIR/extensions/$EXT/target/guice-$EXT-$NEW_VERSION.jar &
+done
+
+python3 -m http.server --directory pkgdiff_reports/