CLD-6707 Automate weekly build (#7685)

* Add utility scripts for automating the build/version number bump PRs

scripts/bump.sh

@@ -0,0 +1,110 @@
+#!/bin/bash
+set -eu -o pipefail
+cd "$(dirname "$0")"/..
+
+log () { echo "[$(date +%Y-%m-%dT%H:%M:%S%Z)]" "$@"; }
+
+: ${BRANCH_TO_BUILD:=main}
+: ${PR_REVIEWERS:=mattermost/core-build-engineers}
+: ${BUMP_BUILD_NUMBER:=}    # You can optionally specify the BUILD_NUMBER variable for selecting the next build number
+                            # If you don't, then the Fastlane action will pick the next build number automatically
+: ${BUMP_VERSION_NUMBER:=}  # If enabled, you must populate the VERSION variable as well
+: ${CREATE_PR:=}            # Enable CREATE_PR to push the commit to origin, and create a corresponding PR
+: ${PR_EXTRA_MESSAGE:=}     # Optional message to add in the PR description
+: ${GIT_LOCAL_BRANCH:=chore-bump-${BRANCH_TO_BUILD}-$(date +%s)}
+
+log "Checking that the configuration is sane"
+if [ -z "${BUMP_BUILD_NUMBER}" -a -z "${BUMP_VERSION_NUMBER}" ]; then
+  log "Error: you must set at least one between BUMP_BUILD_NUMBER and BUMP_VERSION_NUMBER" >&2
+  exit 1
+fi
+if [ -n "$BUMP_VERSION_NUMBER" ]; then
+  : ${VERSION:?Setting this variable is required when BUMP_VERSION_NUMBER is set.}
+  VERSION_REGEXP='^[0-9]+\.[0-9]+\.[0-9]+$'
+  if ! grep -qE $VERSION_REGEXP"" <<<$VERSION; then
+    log "Error: the VERSION variable value should match regexp '$VERSION_REGEXP'. Aborting." >&2
+    exit 2
+  fi
+fi
+
+log "Asserting that the workdir is clean"
+if ! git diff --quiet; then
+  log "Error: workdir is not clean. Aborting" >&2
+  exit 3
+fi
+
+log "Saving the currently checked out branch"
+CURRENT_BRANCH=$(git branch --show-current)
+trap "git checkout $CURRENT_BRANCH" EXIT
+
+if [ -n "$BUMP_BUILD_NUMBER" ]; then
+  log "Selecting the next largest build number..."
+  LATEST_BUILD_NUMBER=$(./scripts/get_latest_build_number.sh)
+  BUILD_NUMBER=$(($LATEST_BUILD_NUMBER + 1))
+  log "Build number to use for the beta build: $BUILD_NUMBER"
+fi
+
+log "Creating branch '${GIT_LOCAL_BRANCH}' based on branch '$BRANCH_TO_BUILD'"
+git checkout $BRANCH_TO_BUILD
+git pull
+git checkout -b $GIT_LOCAL_BRANCH
+
+log "Generating env file required by Fastlane..."
+tee .env <<EOF
+export BRANCH_TO_BUILD=${BRANCH_TO_BUILD}
+export GIT_LOCAL_BRANCH=${GIT_LOCAL_BRANCH}
+export COMMIT_CHANGES_TO_GIT=true
+$([ -n "$BUMP_BUILD_NUMBER" ] && echo "\
+export INCREMENT_BUILD_NUMBER=true
+export BUILD_NUMBER=${BUILD_NUMBER}
+" || :)
+$([ -n "$BUMP_VERSION_NUMBER" ] && echo "\
+export INCREMENT_VERSION_NUMBER=true
+export VERSION=${VERSION}
+" || :)
+EOF
+
+log "Setting up fastlane environment"
+(. .env && cd fastlane && bundle install)
+
+if [ -n "$BUMP_BUILD_NUMBER" ]; then
+  log "Bumping build number..."
+  (. .env && cd fastlane && CI=true bundle exec fastlane set_app_build_number)
+fi
+
+if [ -n "$BUMP_VERSION_NUMBER" ]; then
+  log "Bumping version number..."
+  (. .env && cd fastlane && CI=true bundle exec fastlane set_app_version)
+fi
+
+if [ -n "${CREATE_PR}" ]; then
+  log "Pushing branch ${GIT_LOCAL_BRANCH}, and creating a corresponding PR to ${BRANCH_TO_BUILD}"
+  git push origin ${GIT_LOCAL_BRANCH}
+
+  log "Creating PR"
+  PR_TITLE="Bump app ${BUMP_BUILD_NUMBER:+build}${BUMP_VERSION_NUMBER:+${BUMP_BUILD_NUMBER:+ and }version} number"
+  gh pr create \
+    --repo mattermost/mattermost-mobile \
+    --base main \
+    --head "${GIT_LOCAL_BRANCH}" \
+    --reviewer "${PR_REVIEWERS}" \
+    --title "$PR_TITLE" \
+    $([ -z "$BUMP_VERSION_NUMBER" ] || echo -n "--milestone v${VERSION} --label CherryPick/Approved") \
+    --body-file - <<EOF
+#### Summary
+$([ -z "$BUMP_BUILD_NUMBER" ] || echo "\
+Bump app build number to ${BUILD_NUMBER}
+")
+$([ -z "$BUMP_VERSION_NUMBER" ] || echo "\
+Bump app version number to ${VERSION}
+")
+${PR_EXTRA_MESSAGE}
+
+#### Release Note
+\`\`\`release-note
+NONE
+\`\`\`
+EOF
+else
+  log "Skipping branch push and PR creation. Run with CREATE_PR=yes to perform those operations."
+fi

scripts/get_latest_build_number.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -eu -o pipefail
+
+print_all_remote_refs () {
+  git for-each-ref --format='%(refname:lstrip=2)' refs/remotes | grep -vE '/HEAD$'
+}
+
+BUILD_NUMBERS=""
+for REMOTE_BRANCH in $(print_all_remote_refs); do
+  # Intentionally ignore errors here: we don't want invalid brances, e.g. where the required file is removed, to make this script fail
+  BUILD_NUMBER=$(git cat-file -p ${REMOTE_BRANCH}:android/app/build.gradle | grep -E 'versionCode [0-9]+' | awk '{ print $2; }') || continue
+  BUILD_NUMBERS="$BUILD_NUMBERS $BUILD_NUMBER"
+done
+LATEST_BUILD_NUMBER=$(echo $BUILD_NUMBERS | tr ' ' '\n' | sort --numeric-sort | tail -n1)
+echo $LATEST_BUILD_NUMBER