Generate changelog

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

Release.Jenkinsfile

@@ -53,6 +53,19 @@ pipeline {
                 }
             }
         }
+        stage('Generate Changelog') {
+            agent {
+                label 'linux'
+            }
+            steps {
+                checkout scm
+                withCredentials([string(credentialsId: 'github-compose-release-test-token', variable: 'GITHUB_TOKEN')]) {
+                    sh "./script/release/generate_changelog.sh"
+                }
+                archiveArtifacts artifacts: 'CHANGELOG.md'
+                stash( name: "changelog", includes: 'CHANGELOG.md' )
+            }
+        }
         stage('Package') {
             parallel {
                 stage('macosx binary') {
@@ -153,7 +166,7 @@ pipeline {
                             unstash "bin-darwin"
                             unstash "bin-linux"
                             unstash "bin-win"
-                            githubRelease("docker/compose")
+                            githubRelease()
                         }
                     }
                 }
@@ -272,3 +285,29 @@ def pushRuntimeImage(baseImage) {
         }
     }
 }
+
+def githubRelease() {
+    withCredentials([string(credentialsId: 'github-compose-release-test-token', variable: 'GITHUB_TOKEN')]) {
+        def prerelease = !( env.TAG_NAME ==~ /v[0-9\.]+/ )
+        def data = """{
+            \"tag_name\": \"${env.TAG_NAME}\",
+            \"name\": \"${env.TAG_NAME}\",
+            \"draft\": true,
+            \"prerelease\": ${prerelease},
+            \"body\" : \"${changelog}\"
+        """
+        echo $data
+
+        def url = "https://api.github.com/repos/docker/compose/releases"
+        def upload_url = sh(returnStdout: true, script: """
+            curl -sSf -H 'Authorization: token ${GITHUB_TOKEN}' -H 'Accept: application/json' -H 'Content-type: application/json' -X POST -d '$data' $url") \\
+            | jq '.upload_url | .[:rindex("{")]'
+        """)
+        sh("""
+            for f in * ; do
+                curl -sf -H 'Authorization: token ${GITHUB_TOKEN}' -H 'Accept: application/json' -H 'Content-type: application/octet-stream' \\
+                -X POST --data-binary @\$f ${upload_url}?name=\$f;
+            done
+        """)
+    }
+}

script/release/generate_changelog.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+set -e
+set -x
+
+## Usage :
+## changelog PREVIOUS_TAG..HEAD
+
+# configure refs so we get pull-requests metadata
+git config --add remote.origin.fetch +refs/pull/*/head:refs/remotes/origin/pull/*
+git fetch origin
+
+RANGE=${1:-"$(git describe --tags  --abbrev=0)..HEAD"}
+echo "Generate changelog for range ${RANGE}"
+echo
+
+pullrequests() {
+    for commit in $(git log ${RANGE} --format='format:%H'); do
+        # Get the oldest remotes/origin/pull/* branch to include this commit, i.e. the one to introduce it
+        git branch -a --sort=committerdate  --contains $commit --list 'origin/pull/*' | head -1 | cut -d'/' -f4
+    done
+}
+
+changes=$(pullrequests | uniq)
+
+echo "pull requests merged within range:"
+echo $changes
+
+echo '#Features' > CHANGELOG.md
+for pr in $changes; do
+    curl -fs -H "Authorization: token ${GITHUB_TOKEN}" https://api.github.com/repos/docker/compose/pulls/${pr} \
+    | jq -r ' select( .labels[].name | contains("kind/feature") ) | "* "+.title' >> CHANGELOG.md
+done
+
+echo '#Bugs' >> CHANGELOG.md
+for pr in $changes; do
+    curl -fs -H "Authorization: token ${GITHUB_TOKEN}" https://api.github.com/repos/docker/compose/pulls/${pr} \
+    | jq -r ' select( .labels[].name | contains("kind/bug") ) | "* "+.title' >> CHANGELOG.md
+done