bcs: allow names of other tree-likes, such as MonoGame's 'develop' branch

GitOrigin-RevId: b7fc8ac5aa313168e5cfdc1a82e4931bb617d4b5

tools/scripts/bcs.sh

@@ -8,11 +8,13 @@
 # bcs.sh -C 10 new Vector3
 # bcs.sh -x py sprite
 # bcs.sh -i -x cs -f World spritebatch
+# bcs.sh --tree develop -x cs -f MonoGame.Framework SpriteBatch
 
 # https://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash
 POSITIONAL=()
 GREP_FLAGS=""
 CONTEXT=3
+TREE=master
 
 while [[ $# -gt 0 ]]
 do
@@ -38,6 +40,11 @@ case $key in
   shift # past argument
   shift # past value
   ;;
+  -t|--tree)
+  TREE="$2"
+  shift # past argument
+  shift # past value
+  ;;
   *)    # unknown option
   POSITIONAL+=("$1") # save it in an array for later
   shift # past argument
@@ -47,7 +54,7 @@ done
 set -- "${POSITIONAL[@]}" # restore positional parameters
 
 if [[ -z $@ ]]; then
-  echo 'Usage: bcs.sh [-i] [-f/--file FILE_PATTERN] [-x/--extension EXTENSION] [-C/--context NUM_LINES] QUERY'
+  echo 'Usage: bcs.sh [-i] [-f/--file FILE_PATTERN] [-x/--extension EXTENSION] [-C/--context NUM_LINES] [-t/--tree TREE_NAME] QUERY'
   exit 1
 fi
 
@@ -60,7 +67,7 @@ if [[ -n $EXTENSION ]]; then
 fi
 
 if [[ -n $FILE ]]; then
-  files=$(git ls-tree -r master --name-only | grep "${FILE}")
+  files=$(git ls-tree -r ${TREE} --name-only | grep "${FILE}")
   if [[ -z $files ]]; then
     echo "no files matched"
     exit 0