Fix release version in Github Actions

.github/scripts/attach-binary.sh

@@ -1,14 +1,14 @@
 set -o errexit -o verbose
 
-if test ! "$GITHUB_REF"
+if test ! "$RELEASE_VERSION"
 then
   echo 'This is not a release build.'
 else
-  echo "Attaching binary for $RUNNER_OS to $GITHUB_REF..."
+  echo "Attaching binary for $RUNNER_OS to $RELEASE_VERSION..."
   OWNER="$(echo "$GITHUB_REPOSITORY" | cut -f1 -d/)"
   REPO="$(echo "$GITHUB_REPOSITORY" | cut -f2 -d/)"
   BIN="$(stack path --local-install-root)/bin/$REPO"
-  BUNDLE_NAME="$REPO-$GITHUB_REF-$RUNNER_OS.tar.gz"
+  BUNDLE_NAME="$REPO-$RELEASE_VERSION-$RUNNER_OS.tar.gz"
   cp "$BIN" "./$REPO"
   chmod +x "./$REPO"
   tar -czf "$BUNDLE_NAME" "$REPO"

.github/scripts/install-ghr.sh

@@ -1,6 +1,6 @@
 set -o errexit -o verbose
 
-if test ! "$GITHUB_REF"
+if test ! "$RELEASE_VERSION"
 then
   echo 'This is not a release build.'
 else

.github/workflows/build.yml

@@ -6,6 +6,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
+      - name: Set tag environment
+        run: if [[ "$GITHUB_REF" == refs/tags/* ]]; then echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV; else echo "not a release build"; fi
       - name: Install ghr
         run: ./.github/scripts/install-ghr.sh
       - name: Install stack