Merge pull request #1 from riege/BUILD-52_Provide_GitHub_Action_to_de…

…termine_container_image_tag

BUILD-52 Provide GitHub action to determine the version

.github/workflows/testAction.yml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  action_outputs:
+    runs-on: ubuntu-latest
+    name: Test action
+    steps:
+      - uses: actions/checkout@v1
+      - name: Use Node.js 12
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12
+      - run: npm ci
+      - run: npm test
+      - uses: ./
+        id: version
+      - run: |
+          export VERSION="${{ steps.version.outputs.version }}"
+          echo "$VERSION must match .+-.+-.+"
+          bash -c '[[ $VERSION =~ .+-.+-.+ ]]'

.gitignore

@@ -0,0 +1,5 @@
+.idea
+
+node_modules/*
+
+!node_modules/@actions

README.md

@@ -1,2 +1,34 @@
-# action-container-image-tag
-A GitHub action to determine a container image tag
+# action-version
+A GitHub action to determine the version for build artifacts.
+
+## Outputs
+version: The version string
+
+| CI/CD Build      | Version |
+| ----------- | ----------- |
+| Git tag x.y.z on master branch (a prefixed "v" is okay, too)     | X.Y.Z, X.Y, X, vX.Y.Z ... |
+| Untagged main commit   | main-\<runnumber\>-\<sha\>        |
+| Pull request | pr-\<prnumber\>-\<runnumber\>-\<sha\>
+
+## Example Usage
+```
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  release:
+    branches: [ main ]
+    types: [published]
+
+jobs:
+  action_outputs:
+    runs-on: ubuntu-latest
+    name: Echo action's outputs
+    steps:
+    - id: version
+      uses: riege/[email protected]
+    - run: |
+        echo Version: ${{ steps.version.outputs.version }}
+        echo Image tag: "${{ secrets.ACR_LOGIN_SERVER }}/my-container:${{ steps.version.outputs.version }}"
+```

action.yml

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+name: 'Version'
+description: 'Determine the version for the build artifacts'
+
+outputs:
+  version:
+    description: "The version string"
+
+runs:
+  using: "node12"
+  main: "index.js"

index.js

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+const core = require('@actions/core');
+const getVersion = require('./version');
+
+try {
+    const version = getVersion.get(process.env.GITHUB_REF, process.env.GITHUB_RUN_NUMBER, process.env.GITHUB_SHA);
+    core.setOutput("version", version);
+} catch (error) {
+    core.setFailed(error.message);
+}