add get-git-(active|default)-branch

commands/get-git-active-branch

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+function get_git_active_branch() (
+	source "$DOROTHY/sources/bash.bash"
+
+	# =====================================
+	# Arguments
+
+	function help {
+		cat <<-EOF >/dev/stderr
+			ABOUT:
+			Get the active branch of the local repository.
+
+			USAGE:
+			get-git-active-branch
+		EOF
+		if test "$#" -ne 0; then
+			echo-error "$@"
+		fi
+		return 22 # EINVAL 22 Invalid argument
+	}
+
+	# process
+	local item
+	while test "$#" -ne 0; do
+		item="$1"
+		shift
+		case "$item" in
+		'--help' | '-h') help ;;
+		'--'*) help "An unrecognised flag was provided: $item" ;;
+		*) help "An unrecognised argument was provided: $item" ;;
+		esac
+	done
+
+	# =======================================================
+	# Action
+
+	git rev-parse --abbrev-ref HEAD
+)
+
+# fire if invoked standalone
+if test "$0" = "${BASH_SOURCE[0]}"; then
+	get_git_active_branch "$@"
+fi

commands/get-git-default-branch

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+function get_git_default_branch() (
+	source "$DOROTHY/sources/bash.bash"
+
+	# =====================================
+	# Arguments
+
+	function help {
+		cat <<-EOF >/dev/stderr
+			ABOUT:
+			Get the default branch of the local repository.
+
+			USAGE:
+			get-git-default-branch
+		EOF
+		if test "$#" -ne 0; then
+			echo-error "$@"
+		fi
+		return 22 # EINVAL 22 Invalid argument
+	}
+
+	# process
+	local item
+	while test "$#" -ne 0; do
+		item="$1"
+		shift
+		case "$item" in
+		'--help' | '-h') help ;;
+		'--'*) help "An unrecognised flag was provided: $item" ;;
+		*) help "An unrecognised argument was provided: $item" ;;
+		esac
+	done
+
+	# =======================================================
+	# Action
+
+	function branch_exists {
+		local branch="$1"
+		git rev-parse --abbrev-ref "$branch" &>/dev/null
+		return
+	}
+
+	local default_local default_global
+	default_local="$(git config init.defaultBranch 2>/dev/null || :)"
+	default_global="$(git config --global init.defaultBranch 2>/dev/null || :)"
+
+	if test -n "$default_local" && branch_exists "$default_local"; then
+		print_line "$default_local"
+	elif test -n "$default_global" && branch_exists "$default_global"; then
+		print_line "$default_global"
+	elif branch_exists 'main'; then
+		print_line 'main'
+	elif branch_exists 'master'; then
+		print_line 'master'
+	else
+		echo-error 'Unable to determine the default branch.'
+		return 1
+	fi
+)
+
+# fire if invoked standalone
+if test "$0" = "${BASH_SOURCE[0]}"; then
+	get_git_default_branch "$@"
+fi