Added new input allow_missing_changelog:boolean (#23)

- Added new input `allow_missing_changelog:boolean` that will allow the build to continue to run even though the targeted version was not found on the changelog file.  The default of this input is `false` to stay backwards compatible.

CHANGELOG.md

@@ -10,6 +10,10 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+### Added
+
+- Added new input `allow_missing_changelog:boolean` that will allow the build to continue to run even though the targeted version was not found on the changelog file.  The default of this input is `false` to stay backwards compatible.
+
 ## [1.6.3] - 2023-03-19
 
 - Diagnostics improvements.

README.md

@@ -44,6 +44,7 @@ Currently, changelog format and supported tag names have the following rule:
 |-----------|:------------:|-----------------------------------------------------------------------------|---------|---------|
 | token     | **true** [^1]| GitHub token for creating GitHub Releases (see [action.yml](action.yml) for more) | String |         |
 | changelog | false        | Path to changelog (variables `$tag`, `$version`, `$prefix`, and any string) | String  |         |
+| allow_missing_changelog | false | Allows for the build to continue even if the version is not found in the changelog. The default value of the changelog will be an empty string. | Boolean | `false` |
 | title     | false        | Format of title (variables `$tag`, `$version`, `$prefix`, and any string)   | String  | `$tag`  |
 | draft     | false        | Create a draft release (`true` or `false`)                                  | Boolean | `false` |
 | branch    | false        | Reject releases from commits not contained in branches that match the specified pattern (regular expression) | String  |         |

action.yml

@@ -5,6 +5,13 @@ inputs:
   changelog:
     description: Path to changelog (variables `$tag`, `$version`, `$prefix`, and any string)
     required: false
+  allow_missing_changelog:
+    description: >
+      If true, it will create the GitHub release with an empty notes for the changelog if the changelog.md file does not
+      have the appropriate version in it.  By default, this action will fail if the version tagged is not found in the
+      changelog file.
+    required: false
+    default: false
   title:
     description: Format of title (variables `$tag`, `$version`, `$prefix`, and any string)
     required: false

main.sh

@@ -110,7 +110,14 @@ if [[ -n "${changelog}" ]]; then
     retry curl --proto '=https' --tlsv1.2 -fsSL --retry 10 --retry-connrefused "https://github.com/taiki-e/parse-changelog/releases/download/v${parse_changelog_version}/parse-changelog-${parse_changelog_target}.tar.gz" \
         | "${tar}" xzf -
     parse_changelog_options+=("${changelog}" "${version}")
-    notes=$(./parse-changelog "${parse_changelog_options[@]}")
+
+    # If allow_missing_changelog is true then default to empty value if version not found
+    if [[ "${INPUT_ALLOW_MISSING_CHANGELOG}" == "true" ]]; then
+        notes=$(./parse-changelog "${parse_changelog_options[@]}" || echo "")
+    else
+        notes=$(./parse-changelog "${parse_changelog_options[@]}")
+    fi
+
     rm -f ./parse-changelog
 fi