sync-upstream: allows providing the local branch via cli

contrib/sync-upstream.sh

@@ -3,12 +3,13 @@
 set -eou pipefail
 
 help() {
- echo "$0 range [end]"
- echo " merges every merge commit present in upstream and missing locally."
+ echo "$0 [-b <branch>] range [end]"
+ echo " merges every merge commit present in upstream and missing in <branch> (default: master)."
  echo " If the optional [end] commit is provided, only merges up to [end]."
+ echo " If the optional [-b branch] provided, then ."
  echo
- echo "$0 select <commit> ... <commit>"
- echo " merges every selected merge commit"
+ echo "$0 [-b <branch>] select <commit> ... <commit>"
+ echo " merges every selected merge commit into <branch> (default: master)"
  echo
  echo "This tool creates a branch and a script that can be executed to create the"
  echo "PR automatically. The script requires the github-cli tool (aka gh)."
@@ -17,12 +18,9 @@ help() {
  exit 1
 }
 
-if [ "$#" -lt 1 ]; then
- help
-fi
-
 REMOTE=upstream
 REMOTE_BRANCH="$REMOTE/master"
+LOCAL_BRANCH="master"
 # Makes sure you have a remote "upstream" that is up-to-date
 setup() {
  ret=0
@@ -41,7 +39,7 @@ setup() {
 }
 
 range() {
- RANGESTART_COMMIT=$(git merge-base "$REMOTE_BRANCH" master)
+ RANGESTART_COMMIT=$(git merge-base "$REMOTE_BRANCH" "$LOCAL_BRANCH")
  RANGEEND_COMMIT=$(git rev-parse "$REMOTE_BRANCH")
  if [ "$#" = 1 ]; then
  RANGEEND_COMMIT=$1
@@ -57,18 +55,37 @@ range() {
  esac
 }
 
+# Process -b <branch> argument
+while getopts "b:" opt; do
+ case $opt in
+ b)
+ LOCAL_BRANCH=$OPTARG
+ ;;
+ \?)
+ echo "Invalid option: -$OPTARG" >&2
+ ;;
+ esac
+done
+
+# Shift off the processed options
+shift $((OPTIND -1))
+
+if [ "$#" -lt 1 ]; then
+ help
+fi
+
 case $1 in
  range)
  shift
  setup
  range "$@"
- REPRODUCE_COMMAND="$0 range $RANGEEND_COMMIT"
+ REPRODUCE_COMMAND="$0 range -b $LOCAL_BRANCH $RANGEEND_COMMIT"
  ;;
  select)
  shift
  setup
  COMMITS=$*
- REPRODUCE_COMMAND="$0 select $@"
+ REPRODUCE_COMMAND="$0 select -b $LOCAL_BRANCH $@"
  ;;
  help)
  help
@@ -96,7 +113,7 @@ echo "-----------------------------------"
 echo "$BODY"
 echo "-----------------------------------"
 # Create branch from PR commit and create PR
-git checkout master
+git checkout "$LOCAL_BRANCH"
 git pull --autostash
 git checkout -b temp-merge-"$PRNUM"
 
@@ -115,7 +132,7 @@ cat <<EOT > "$FNAME"
 #!/bin/sh
 gh pr create -t '$TITLE' -b '$BODY' --web
 # Remove temporary branch
-git checkout master
+git checkout "$LOCAL_BRANCH"
 git branch -D temp-merge-"$PRNUM"
 EOT
 chmod +x "$FNAME"