handle tag update properly

hole19 · Oct 29, 2019 · 23a9053 · 23a9053
1 parent 6e6ee5e
commit 23a9053
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diff --git a/README.md b/README.md
@@ -12,7 +12,7 @@ GitHub action that adds a lightweight git tag to the current workflow commit.
 ## Example usage
 
 ```yaml
-uses: hole19/git-tag-action@v1
+uses: hole19/git-tag-action@master
 env:
   TAG: v1.2.3
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

diff --git a/entrypoint.sh b/entrypoint.sh
@@ -11,18 +11,38 @@ if [[ -z "${GITHUB_TOKEN}" ]]; then
    exit 1
 fi
 
+# check if tag already exists
+tag_exists="false"
+if [ $(git tag -l "$TAG") ]; then
+    tag_exists="true"
+fi
+
 # push the tag to github
 git_refs_url=$(jq .repository.git_refs_url $GITHUB_EVENT_PATH | tr -d '"' | sed 's/{\/sha}//g')
 
 echo "**pushing tag $tag to repo $GITHUB_REPOSITORY"
 
-curl -s -X POST $git_refs_url \
--H "Authorization: token $GITHUB_TOKEN" \
--d @- << EOF
+if $tag_exists
+then
+  # update tag
+  curl -s -X PATCH "$git_refs_url/tags/$TAG" \
+  -H "Authorization: token $GITHUB_TOKEN" \
+  -d @- << EOF
 
-{
-  "ref": "refs/tags/$TAG",
-  "sha": "$GITHUB_SHA",
-  "force": true
-}
+  {
+    "sha": "$GITHUB_SHA",
+    "force": true
+  }
 EOF
+else
+  # create new tag
+  curl -s -X POST $git_refs_url \
+  -H "Authorization: token $GITHUB_TOKEN" \
+  -d @- << EOF
+
+  {
+    "ref": "refs/tags/$TAG",
+    "sha": "$GITHUB_SHA",
+  }
+EOF
+fi