add draft option

Add 'draft' input option to create GH release as draft.

README.md

@@ -38,6 +38,7 @@ Currently, changelog format and supported tag names have the following rule:
 |-----------|:--------:|----------------------------------------------------------------|--------|---------|
 | changelog | false    | Path to changelog                                              | String |         |
 | title     | false    | Format of title (variables `$tag`, `$version`, and any string) | String | `$tag`  |
+| draft     | false    | Create a draft release ('true' or 'false')                     | String | `false` |
 
 ### Example workflow: Basic usage
 
@@ -58,6 +59,8 @@ jobs:
         with:
           # (optional) Path to changelog.
           changelog: CHANGELOG.md
+          # (optional) Create a draft release.
+          draft: true
         env:
           # (required) GitHub token for creating GitHub Releases.
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

action.yml

@@ -9,6 +9,10 @@ inputs:
     description: Format of title (variables `$tag`, `$version`, and any string)
     required: false
     default: '$tag'
+  draft:
+    description: Create a draft release ('true' or 'false')
+    required: false
+    default: 'false'
 
 runs:
   using: node12

main.sh

@@ -11,6 +11,7 @@ parse_changelog_tag="v0.3.0"
 
 title="${INPUT_TITLE:?}"
 changelog="${INPUT_CHANGELOG:-}"
+draft="${INPUT_DRAFT:-}"
 
 if [[ -z "${GITHUB_TOKEN:-}" ]]; then
     error "GITHUB_TOKEN not set"
@@ -62,5 +63,12 @@ if gh release view "${tag}" &>/dev/null; then
     # https://cli.github.com/manual/gh_release_delete
     gh release delete "${tag}" -y
 fi
+
+gh_options=""
+
+if [[ "$draft" == "true" ]]; then
+    gh_options="--draft"
+fi
+
 # https://cli.github.com/manual/gh_release_create
-gh release create "${tag}" ${prerelease:-} --title "${title}" --notes "${notes:-}"
+gh release create ${gh_options} "${tag}" ${prerelease:-} --title "${title}" --notes "${notes:-}"