Fix unzip issue and add home variable (#44)

README.md

@@ -176,6 +176,15 @@ jobs:
 
 # Version history
 
+## v1.3
+  * The install location of the Dart SDK is now available
+    in an environment variable, `DART_HOME`
+    ([#43](https://github.com/dart-lang/setup-dart/issues/43))
+
+  * Fixed a issue where cached downloads could lead to unzip issues
+    on self hosted runners
+    ([#35](https://github.com/dart-lang/setup-dart/issues/35))
+
 ## v1.2
   * Fixed a path issue impacting git dependencies on Windows.
 

setup.sh

@@ -77,7 +77,7 @@ echo "Downloading ${URL}..."
 
 # Download installation zip.
 curl --connect-timeout 15 --retry 5 "$URL" > "${HOME}/dartsdk.zip"
-unzip "${HOME}/dartsdk.zip" -d "${RUNNER_TOOL_CACHE}" > /dev/null
+unzip -o "${HOME}/dartsdk.zip" -d "${RUNNER_TOOL_CACHE}" > /dev/null
 if [ $? -ne 0 ]; then
   echo -e "::error::Download failed! Please check passed arguments."
   exit 1
@@ -95,6 +95,7 @@ echo "PUB_CACHE=${PUBCACHE}" >> $GITHUB_ENV
 echo "Pub cache set to: ${PUBCACHE}"
 
 # Update paths.
+echo "DART_HOME=${RUNNER_TOOL_CACHE}/dart-sdk/" >> $GITHUB_ENV
 echo "${PUBCACHE}/bin" >> $GITHUB_PATH
 echo "${RUNNER_TOOL_CACHE}/dart-sdk/bin" >> $GITHUB_PATH