Add support for custom changelog format (#1)

* feat: add changelog_structure

* feat: bump minor version

Author: Klemensas

action.yml

@@ -18,6 +18,9 @@ inputs:
   tag_message:
     description: This is the annotated commit message associated with the tag. By default, a changelog will be generated from the commits between the latest tag and the new tag (HEAD). This will override that with a hard-coded message.
     required: false
+  changelog_structure:
+    description: "A string denoting changelog format. Supports `{{message}}`, `{{author}}` and `{{sha}}`. Defaults to `**1) {{message}}** {{author}}\n(SHA: {{sha}})\n` Only used when tag_message is empty."
+    required: false
   version:
     description: Explicitly set the version here instead of automatically detecting from `package.json`. Useful for non-JavaScript projects where version may be output by a previous action.
     required: false

lib/main.js

@@ -65,7 +65,8 @@ async function run() {
 
     const tagPrefix = core.getInput('tag_prefix', { required: false })
     const tagSuffix = core.getInput('tag_suffix', { required: false })
-    
+    const changelogStructure = core.getInput('changelog_structure', { required: false })
+
     const getTagName = version => {
       return `${tagPrefix}${version}${tagSuffix}`
     }
@@ -93,17 +94,17 @@ async function run() {
           base: latestTag.name,
           head: 'master',
         })
+        const structure = changelogStructure || `**1) {{message}}** {{author}}\n(SHA: {{sha}})\n`
 
         tagMsg = changelog.data.commits
           .map(
             commit =>
-              `**1) ${commit.commit.message}**${
-                commit.hasOwnProperty('author')
-                  ? commit.author.hasOwnProperty('login')
-                    ? ' (' + commit.author.login + ')'
-                    : ''
-                  : ''
-              }\n(SHA: ${commit.sha})\n`
+              structure
+                .replace(/({{message}})|({{author}})|({{sha}})/g, (match, message, author, sha) => {
+                  if (message) return commit.commit.message
+                  if (author) return !commit.hasOwnProperty('author') || !commit.author.hasOwnProperty('login') ? '' : commit.author.login
+                  if (sha) return commit.sha
+                })
           )
           .join('\n')
       } catch (e) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "autotag-action",
-  "version": "1.0.2",
+  "version": "1.1.0",
   "private": true,
   "description": "Automatically create a tag whenever the version changes in package.json",
   "main": "lib/main.js",