chore(ci): convert create-pr steps into composite action

.github/actions/create-pr/action.yml

@@ -0,0 +1,88 @@
+name: "Create PR custom action"
+description: "Create a PR and a temporary branch, close duplicates"
+
+# PROCESS
+#
+# 1. Setup git client using Powertools bot username
+# 2. Pushes staged files to a temporary branch
+# 3. Creates a PR from temporary branch against a target branch (typically trunk: develop, main, etc.)
+# 4. Searches for duplicate PRs with the same title
+# 5. If duplicates are found, link to the most recent one, close and delete their branches so we keep a single PR
+# 6. In the event of failure, we delete the now orphaned branch (if any), and propagate the failure
+
+# USAGE
+#
+# - name: Create PR
+#   id: create-pr
+#   uses: ./.github/actions/create-pr
+#   with:
+#     files: "CHANGELOG.md"
+#     temp_branch_prefix: "ci-changelog"
+#     pull_request_title: "chore(ci): changelog rebuild"
+#     github_token: ${{ secrets.GITHUB_TOKEN }}
+# - name: Step to demonstrate how to access outputs (no need for this)
+#   run: |
+#     echo "PR number: ${PR_ID}"
+#     echo "Branch: ${BRANCH}"
+#   env:
+#     PR_ID: ${{ steps.create-pr.outputs.pull_request_id}}
+#     BRANCH: ${{ steps.create-pr.outputs.temp_branch}}
+
+inputs:
+  files:
+    description: "Files to add separated by space"
+    required: true
+  temp_branch_prefix:
+    description: "Prefix for temporary git branch to be created, e.g, ci-docs"
+    required: true
+  pull_request_title:
+    description: "Pull Request title to use"
+    required: true
+  github_token:
+    description: "GitHub token for GitHub CLI"
+    required: true
+  target_branch:
+    description: "Branch to target when creating a PR against (develop, by default)"
+    required: false
+    default: develop
+
+outputs:
+  pull_request_id:
+    description: "Pull request ID created"
+    value: ${{ steps.create-pr.outputs.pull_request_id }}
+  temp_branch:
+    description: "Temporary branch created with staged changed"
+    value: ${{ steps.create-pr.outputs.temp_branch }}
+
+runs:
+  using: "composite"
+  steps:
+    - id: adjust-path
+      run: echo "${{ github.action_path }}" >> $GITHUB_PATH
+      shell: bash
+    - id: setup-git
+      name: Git client setup and refresh tip
+      run: |
+        git config user.name "Powertools bot"
+        git config user.email "[email protected]"
+        git config pull.rebase true
+        git config remote.origin.url >&-
+      shell: bash
+    - id: create-pr
+      working-directory: ${{ env.GITHUB_WORKSPACE }}
+      run: create_pr_for_staged_changes.sh "${FILES}"
+      env:
+        FILES: ${{ inputs.files }}
+        TEMP_BRANCH_PREFIX: ${{ inputs.temp_branch_prefix }}
+        PR_TITLE: ${{ inputs.pull_request_title }}
+        BASE_BRANCH: ${{ inputs.target_branch }}
+        GH_TOKEN: ${{ inputs.github_token }}
+      shell: bash
+    - id: cleanup
+      name: Cleanup orphaned branch
+      if: failure()
+      run: git push origin --delete "${TEMP_BRANCH_PREFIX}-${GITHUB_RUN_ID}" || echo "Must have failed before creating temporary branch; no cleanup needed."
+      env:
+        TEMP_BRANCH_PREFIX: ${{ inputs.temp_branch_prefix }}
+        GITHUB_RUN_ID: ${{ github.run_id }}
+      shell: bash

.github/actions/create-pr/create_pr_for_staged_changes.sh

@@ -0,0 +1,145 @@
+#!/bin/bash
+set -uo pipefail # prevent accessing unset env vars, prevent masking pipeline errors to the next command
+
+#docs
+#title              :create_pr_for_staged_changes.sh
+#description        :This script will create a PR for staged changes, detect and close duplicate PRs.
+#author		    :@heitorlessa
+#date               :May 8th 2023
+#version            :0.1
+#usage		    :bash create_pr_for_staged_changes.sh {git_staged_files_or_directories_separated_by_space}
+#notes              :Meant to use in GitHub Actions only. Temporary branch will be named $TEMP_BRANCH_PREFIX-$GITHUB_RUN_ID
+#os_version         :Ubuntu 22.04.2 LTS
+#required_env_vars  :PR_TITLE, TEMP_BRANCH_PREFIX, GH_TOKEN
+#==============================================================================
+
+# Sets GitHub Action with error message to ease troubleshooting
+function error() {
+    echo "::error file=${FILENAME}::$1"
+    exit 1
+}
+
+function debug() {
+    TIMESTAMP=$(date -u "+%FT%TZ") # 2023-05-10T07:53:59Z
+    echo ""${TIMESTAMP}" - $1"
+}
+
+function notice() {
+    echo "::notice file=${FILENAME}::$1"
+}
+
+function start_span() {
+    echo "::group::$1"
+}
+
+function end_span() {
+    echo "::endgroup::"
+}
+
+function has_required_config() {
+    start_span "Validating required config"
+    test -z "${TEMP_BRANCH_PREFIX}" && error "TEMP_BRANCH_PREFIX env must be set to create a PR"
+    test -z "${PR_TITLE}" && error "PR_TITLE env must be set"
+    test -z "${GH_TOKEN}" && error "GH_TOKEN env must be set for GitHub CLI"
+
+    # Default GitHub Actions Env Vars: https://docs.github.com/en/actions/learn-github-actions/variables#default-environment-variables
+    debug "Are we running in GitHub Action environment?"
+    test -z "${GITHUB_RUN_ID}" && error "GITHUB_RUN_ID env must be set to trace Workflow Run ID back to PR"
+    test -z "${GITHUB_SERVER_URL}" && error "GITHUB_SERVER_URL env must be set to trace Workflow Run ID back to PR"
+    test -z "${GITHUB_REPOSITORY}" && error "GITHUB_REPOSITORY env must be set to trace Workflow Run ID back to PR"
+
+    debug "Config validated successfully!"
+    set_environment_variables
+    end_span
+}
+
+function set_environment_variables() {
+    start_span "Setting environment variables"
+    export readonly WORKFLOW_URL="${GITHUB_SERVER_URL}"/"${GITHUB_REPOSITORY}"/actions/runs/"${GITHUB_RUN_ID}" # e.g., heitorlessa/aws-lambda-powertools-test/actions/runs/4913570678
+    export readonly TEMP_BRANCH="${TEMP_BRANCH_PREFIX}"-"${GITHUB_RUN_ID}"                                     # e.g., ci-changelog-4894658712
+    export readonly BASE_BRANCH="${BASE_BRANCH:-develop}"                                                      # e.g., main, defaults to develop if missing
+    export readonly PR_BODY="This is an automated PR created from the following workflow"
+    export readonly FILENAME=".github/scripts/$(basename "$0")"
+    export readonly NO_DUPLICATES_MESSAGE="No duplicated PRs found"
+    end_span
+}
+
+function has_anything_changed() {
+    start_span "Validating git staged files"
+    HAS_ANY_SOURCE_CODE_CHANGED="$(git status --porcelain)"
+
+    test -z "${HAS_ANY_SOURCE_CODE_CHANGED}" && debug "Nothing to update; exitting early" && exit 0
+    end_span
+}
+
+function create_temporary_branch_with_changes() {
+    start_span "Creating temporary branch: "${TEMP_BRANCH}""
+    git checkout -b "${TEMP_BRANCH}"
+
+    debug "Committing staged files: $*"
+    echo "$@" | xargs -n1 git add || error "Failed to add staged changes: "$@""
+    git commit -m "${PR_TITLE}"
+
+    git push origin "${TEMP_BRANCH}"
+    end_span
+}
+
+function create_pr() {
+    start_span "Creating PR against ${TEMP_BRANCH} branch"
+    NEW_PR_URL=$(gh pr create --title "${PR_TITLE}" --body "${PR_BODY}: ${WORKFLOW_URL}" --base "${BASE_BRANCH}" || error "Failed to create PR") # e.g, https://github.com/awslabs/aws-lambda-powertools/pull/13
+
+    # greedy remove any string until the last URL path, including the last '/'. https://opensource.com/article/17/6/bash-parameter-expansion
+    debug "Extracing PR Number from PR URL: "${NEW_PR_URL}""
+    NEW_PR_ID="${NEW_PR_URL##*/}" # 13
+    export NEW_PR_URL
+    export NEW_PR_ID
+    end_span
+}
+
+function close_duplicate_prs() {
+    start_span "Searching for duplicate PRs"
+    DUPLICATE_PRS=$(gh pr list --search "${PR_TITLE}" --json number --jq ".[] | select(.number != ${NEW_PR_ID}) | .number") # e.g, 13\n14
+
+    if [ -z "${DUPLICATE_PRS}" ]; then
+        debug "No duplicate PRs found"
+        DUPLICATE_PRS="${NO_DUPLICATES_MESSAGE}"
+    else
+        debug "Closing duplicated PRs: "${DUPLICATE_PRS}""
+        echo "${DUPLICATE_PRS}" | xargs -L1 gh pr close --delete-branch --comment "Superseded by #${NEW_PR_ID}"
+    fi
+
+    export readonly DUPLICATE_PRS
+    end_span
+}
+
+function report_job_output() {
+    start_span "Updating job outputs"
+    echo pull_request_id="${NEW_PR_ID}" >>"$GITHUB_OUTPUT"
+    echo temp_branch="${TEMP_BRANCH}" >>"$GITHUB_OUTPUT"
+    end_span
+}
+
+function report_summary() {
+    start_span "Creating job summary"
+    echo "### Pull request created successfully :rocket: ${NEW_PR_URL} <br/><br/> Closed duplicated PRs: ${DUPLICATE_PRS}" >>"$GITHUB_STEP_SUMMARY"
+
+    notice "PR_URL is: ${NEW_PR_URL}"
+    notice "PR_BRANCH is: ${TEMP_BRANCH}"
+    notice "PR_DUPLICATES are: ${DUPLICATE_PRS}"
+    end_span
+}
+
+function main() {
+    # Sanity check
+    has_anything_changed
+    has_required_config
+
+    create_temporary_branch_with_changes "$@"
+    create_pr
+    close_duplicate_prs
+
+    report_job_output
+    report_summary
+}
+
+main "$@"

.github/workflows/build_changelog.yml

@@ -3,17 +3,9 @@ name: Build changelog
 
 on:
   workflow_dispatch:
-  schedule:
-           # ┌───────────── minute (0 - 59)
-           # │ ┌───────────── hour (0 - 23)
-           # │ │ ┌───────────── day of the month (1 - 31)
-           # │ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
-           # │ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
-           # │ │ │ │ │
-           # │ │ │ │ │
-           # │ │ │ │ │
-           # * * * * *
-    - cron: '0 8 * * *'
+  push:
+    branches:
+      - develop
 
 jobs:
   changelog: