Add release flow (#19)

.github/release.yml

@@ -0,0 +1,17 @@
+changelog:
+  categories:
+    - title: "Features :star:"
+      labels:
+        - "feature"
+
+    - title: "Improvements :arrow_up:"
+      labels:
+        - "enhancement"
+
+    - title: "Bugfixes :bug:"
+      labels:
+        - "bug"
+
+    - title: "Maintenance :wrench:"
+      labels:
+        - "dependencies"

.github/workflows/build.yml

@@ -1,11 +1,16 @@
-on: [push]
+on: [pull_request, push]
 
 jobs:
   build:
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v3
+
       - run: sudo apt-get update
+
       - run: sudo apt-get -y install libcurl4-openssl-dev
+
       - run: cmake .
+
       - run: make -j

.github/workflows/publish.yml

@@ -1,4 +1,4 @@
-name: Publish Docker image
+name: Publish snapshot image
 
 on:
   push:
@@ -8,13 +8,18 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v3
+
     - name: Login to the container registry
       run: echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u $GITHUB_ACTOR --password-stdin
+
     - name: Download the latest image for caching
       run: docker pull ghcr.io/thepieterdc/mailbridge:latest
+
     - name: Build the new image
       run: docker build . -t ghcr.io/thepieterdc/mailbridge:latest --cache-from ghcr.io/thepieterdc/mailbridge:latest
+
     - name: Push the new image
       run: docker push ghcr.io/thepieterdc/mailbridge:latest

.github/workflows/release.yml

@@ -0,0 +1,124 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: Version number
+        required: true
+
+jobs:
+  image:
+    name: Publish image to Docker registry
+
+    runs-on: ubuntu-latest
+
+    needs: prepare
+
+    permissions:
+      packages: write
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.inputs.version }}
+
+      - name: Login to the container registry
+        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u $GITHUB_ACTOR --password-stdin
+
+      - name: Download the latest snapshot image for caching
+        run: docker pull ghcr.io/thepieterdc/mailbridge:latest-snapshot
+
+      - name: Build the new image
+        run: docker build . -t ghcr.io/thepieterdc/mailbridge:latest -t ghcr.io/thepieterdc/mailbridge:${{ github.event.inputs.version }} --cache-from ghcr.io/thepieterdc/mailbridge:latest-snapshot
+
+      - name: Push the new image
+        run: docker push -a ghcr.io/thepieterdc/mailbridge
+
+  prepare:
+    name: Prepare the release
+
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Create a release branch
+        run: |
+          git checkout -b release
+          git push -u origin release
+
+      - name: Configure git
+        run: |
+          git config user.email "[email protected]"
+          git config user.name "GitHub Actions"
+
+      - name: Set the release version
+        run: ./scripts/set-version.sh ${{ github.event.inputs.version }}
+
+      - name: Make the release commit
+        uses: EndBug/add-and-commit@v9
+        with:
+          add: 'CMakeLists.txt'
+          branch: release
+          commit: '--signoff'
+          default_author: github_actions
+          message: "Release v${{ github.event.inputs.version }}"
+          tag: ${{ github.event.inputs.version }}
+
+  release:
+    name: Publish release
+
+    runs-on: ubuntu-latest
+
+    needs: prepare
+
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: release
+
+      - name: Configure git
+        run: |
+          git config user.email "[email protected]"
+          git config user.name "GitHub Actions"
+
+      - name: Create release
+        id: release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          draft: false
+          prerelease: false
+          release_name: ${{ github.event.inputs.version }}
+          tag_name: ${{ github.event.inputs.version }}
+
+      - name: Increase the version
+        run: ./scripts/increment-version.sh
+
+      - name: Make the next development commit
+        uses: EndBug/add-and-commit@v9
+        with:
+          add: 'CMakeLists.txt'
+          branch: release
+          commit: '--signoff'
+          default_author: github_actions
+          message: "Prepare the next development cycle"
+
+      - name: Open a pull request
+        uses: repo-sync/pull-request@v2
+        with:
+          destination_branch: master
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          pr_assignee: thepieterdc
+          pr_body: Merge the release commits into the main branch.
+          pr_title: Release v${{ github.event.inputs.version }}
+          source_branch: release

scripts/increment-version.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+set -eu
+
+usage() {
+    echo "Syntax: ./scripts/increment-version.sh"
+    exit 1
+}
+
+# Get the current version.
+version=$(cat CMakeLists.txt | grep "mailbridge VERSION" | grep -o '".*"' | tr -d '"')
+
+# Strip the optional -SNAPSHOT part.
+if echo "$version" | grep -q "\-SNAPSHOT"; then
+    version=$(echo "$version" | sed "s/-SNAPSHOT//g")
+fi
+
+# Split the version.
+major=$(echo "$version" | egrep -o "^[0-9]+")
+minor=$(echo "$version" | egrep -o "\.[0-9]+\." | egrep -o "[0-9]+")
+bugfix=$(echo "$version" | egrep -o "\.[0-9]+$" | egrep -o "[0-9]+")
+
+# Increment the bugfix version.
+bugfix=$((bugfix+1))
+
+# Build the new version.
+newversion="$major.$minor.$bugfix-SNAPSHOT"
+
+# Set the new version.
+./scripts/set-version.sh "$newversion"

scripts/set-version.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+set -eu
+
+usage() {
+    echo "Syntax: ./scripts/set-version.sh 1.0.0"
+    exit 1
+}
+
+# Check if the version argument was passed.
+if [ "$#" -ne 1 ]; then
+    usage
+fi
+
+# Replace the version.
+sed -i "s/mailbridge VERSION \".*\"/mailbridge VERSION \"$1\"/" CMakeLists.txt