Allow custom commit messages for version bump

README.md

@@ -86,3 +86,13 @@ Make sure you use the `actions/checkout@v2` action!
   with:
     target-branch: 'master'
 ```
+
+**commit-message:** Set a custom commit message for version bump commit. Useful for skipping additional workflows run on push. Example:
+```yaml
+- name:  'Automated Version Bump'
+  uses:  'phips28/gh-action-bump-version@master'
+  env:
+    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  with:
+    commit-message: 'CI: bumps version to {{version}} [skip ci]'
+```

action.yml

@@ -39,6 +39,10 @@ inputs:
     description: 'Set a default version bump to use'
     default: 'patch'
     required: false
+  commit-message:
+    description: 'Set a custom commit message for version bump commit'
+    deafult: ''
+    required: false
 outputs:
   newTag:
     description: 'The newly created tag'

index.js

@@ -18,9 +18,11 @@ Toolkit.run(async tools => {
 
   const messages = event.commits ? event.commits.map(commit => commit.message + '\n' + commit.body) : []
 
-  const commitMessage = 'version bump to'
+  const commitMessage = process.env['INPUT_COMMIT-MESSAGE'] || 'ci: version bump to {{version}}'
   console.log('messages:', messages)
-  const isVersionBump = messages.map(message => message.toLowerCase().includes(commitMessage)).includes(true)
+  const commitMessageRegex = new RegExp(commitMessage.replace('{{version}}', 'v\d\.\d\.\d'), 'ig');
+  const isVersionBump = messages.find(message => commitMessageRegex.test(message)) !== undefined
+
   if (isVersionBump) {
     tools.exit.success('No action necessary!')
     return
@@ -89,7 +91,7 @@ Toolkit.run(async tools => {
       ['version', '--allow-same-version=true', '--git-tag-version=false', current])
     console.log('current:', current, '/', 'version:', version)
     let newVersion = execSync(`npm version --git-tag-version=false ${version}`).toString().trim()
-    await tools.runInWorkspace('git', ['commit', '-a', '-m', `ci: ${commitMessage} ${newVersion}`])
+    await tools.runInWorkspace('git', ['commit', '-a', '-m', commitMessage.replace('{{version}}', newVersion)])
 
     // now go to the actual branch to perform the same versioning
     if (isPullRequest) {
@@ -106,7 +108,7 @@ Toolkit.run(async tools => {
     console.log(`::set-output name=newTag::${newVersion}`)
     try {
       // to support "actions/checkout@v1"
-      await tools.runInWorkspace('git', ['commit', '-a', '-m', `ci: ${commitMessage} ${newVersion}`])
+      await tools.runInWorkspace('git', ['commit', '-a', '-m', commitMessage.replace('{{version}}', newVersion)])
     } catch (e) {
       console.warn('git commit failed because you are using "actions/checkout@v2"; ' +
         'but that doesnt matter because you dont need that git commit, thats only for "actions/checkout@v1"')