feat: Autobuild changed build files from git commit

aptpkg

@@ -15,6 +15,7 @@ Documentation: https://man.sr.ht/~earnestma/aptpkg
 
 Usage:
 	aptpkg [directory]
+	aptpkg --auto (commit id)  Autobuild modified packages from commit
 	aptpkg -h, --help          Show help
 EOF
 }
@@ -114,10 +115,29 @@ load_build(){
 	esac
 }
 
+# Autobuild packages based on git list files changed in commit
+# latest (HEAD) assumed if commit hash not provided
+change_autobuild_pkgs(){
+	[ -d .git ] || error_usage_die "Current directory is not a git repository!"
+
+	commitid=$1
+	[ -n "$commitid" ] || commitid=HEAD
+
+	build_chg=$(git diff-tree --no-commit-id --name-only -r $commitid | grep "build" | sed 's#/build##')
+	echo "Using $commitid with files $build_chg"
+
+	for f in $build_chg; do
+		aptpkg "$f"
+	done
+}
+
 # Run!
 case $1 in
 	-h|--help)
 		show_help ;;
+	--auto)
+		shift
+		change_autobuild_pkgs "$1" ;;
 	*)
 		if [ $# -ne 1 ]; then
 			error_usage_die "You must provide one directory"