feat: restrict version to tag

README.md

@@ -225,6 +225,21 @@ Useful for projects where the version number may be output by a previous action.
     version: "${{ steps.previous_step.outputs.version }}"
 ```
 
+### minVersion
+
+Set the minimum version which would be used to create a tag. 
+
+The default value (`0.0.1`) prevents a `0.0.0` from being created. This can also be used when introducing Autotag to a repository which has already tagged.
+
+For example, if the version `0.1.0` would already have been published, set the `minVersion` to the next patch to preent a duplicate tag.
+
+```yaml
+- uses: butlerlogic/action-autotag@1.0.0
+  with:
+    GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+    minVersion: "0.1.1"
+```
+
 ## Developer Notes
 
 If you are building an action that runs after this one, be aware this action produces several [outputs](https://help.github.com/en/articles/metadata-syntax-for-github-actions#outputs):

action.yml

@@ -31,6 +31,10 @@ inputs:
   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
+  minVersion:
+    description: Minimum version required to create a tag. By default it will prevent a version `0.0.0` to be tagged. Also useful when introducing Autotag to an existing repo, to start auto-tagging from a specific version
+    required: false
+    default: '0.0.1'
   regex_pattern:
     description: An optional attribute containing the regular expression used to extract the version number.
     required: false

app/main.js

@@ -48,6 +48,12 @@ async function run () {
     if (!version) {
       throw new Error(`No version identified${msg}`)
     }
+    
+    const minVersion = core.getInput('minVersion', { required: false })
+    if (version < minVersion) {
+      core.warning(`Version "${version}" is lower than minimum "${minVersion}"`)
+      return
+    }
 
     core.warning(`Recognized "${version}"${msg}`)
     core.setOutput('version', version)