Subject: [PATCH v4 6/7] git-submodule.sh: improve variables readability

From: Roy Eldar <[email-masked]>
Date: Wed, 11 Dec 2024 08:32:33 +0200

When git-submodule.sh parses various options and switches, it sets some
variables to values; the variables in turn affect the options given to
git-submodule--helper.

Currently, variables which correspond to switches have boolean values
(for example, whenever "--force" is passed, force=1), while variables
which correspond to options which take arguments have string values that
sometimes contain the option name and sometimes only the option value.

Set all of the variables to strings which contain the option name (e.g.
force="--force" rather than force=1); this has a couple of advantages:
it improves consistency, readability and debuggability.

Suggested-by: Junio C Hamano <[email-masked]>
Signed-off-by: Roy Eldar <[email-masked]>
---
 git-submodule.sh | 213 +++++++++++++++++++++--------------------------
 1 file changed, 95 insertions(+), 118 deletions(-)

diff --git a/git-submodule.sh b/git-submodule.sh
index ee86e4de46..6df25efc48 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -52,6 +52,10 @@ single_branch=
 jobs=
 recommend_shallow=
 filter=
+deinit_all=
+default=
+summary_limit=
+for_status=
 
 #
 # Add a new submodule to the working tree, .gitmodules and the index
@@ -63,37 +67,33 @@ filter=
 cmd_add()
 {
 	# parse $args after "submodule ... add".
-	reference_path=
 	while test $# -ne 0
 	do
 		case "$1" in
 		-b | --branch)
 			case "$2" in '') usage ;; esac
-			branch=$2
+			branch="--branch=$2"
 			shift
 			;;
-		-b*)
-			branch="${1#-b}"
-			;;
-		--branch=*)
-			branch="${1#--branch=}"
+		-b* | --branch=*)
+			branch="$1"
 			;;
 		-f | --force)
 			force=$1
 			;;
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			;;
 		--progress)
-			progress=1
+			progress=$1
 			;;
 		--reference)
 			case "$2" in '') usage ;; esac
-			reference_path=$2
+			reference="--reference=$2"
 			shift
 			;;
 		--reference=*)
-			reference_path="${1#--reference=}"
+			reference="$1"
 			;;
 		--ref-format)
 			case "$2" in '') usage ;; esac
@@ -104,15 +104,15 @@ cmd_add()
 			ref_format="$1"
 			;;
 		--dissociate)
-			dissociate=1
+			dissociate=$1
 			;;
 		--name)
 			case "$2" in '') usage ;; esac
-			custom_name=$2
+			custom_name="--name=$2"
 			shift
 			;;
 		--name=*)
-			custom_name="${1#--name=}"
+			custom_name="$1"
 			;;
 		--depth)
 			case "$2" in '') usage ;; esac
@@ -120,7 +120,7 @@ cmd_add()
 			shift
 			;;
 		--depth=*)
-			depth=$1
+			depth="$1"
 			;;
 		--)
 			shift
@@ -142,14 +142,14 @@ cmd_add()
 	fi
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper add \
-		${quiet:+--quiet} \
-		${force:+--force} \
-		${progress:+"--progress"} \
-		${branch:+--branch "$branch"} \
-		${reference_path:+--reference "$reference_path"} \
+		$quiet \
+		$force \
+		$progress \
+		${branch:+"$branch"} \
+		${reference:+"$reference"} \
 		${ref_format:+"$ref_format"} \
-		${dissociate:+--dissociate} \
-		${custom_name:+--name "$custom_name"} \
+		$dissociate \
+		${custom_name:+"$custom_name"} \
 		${depth:+"$depth"} \
 		-- \
 		"$@"
@@ -168,10 +168,10 @@ cmd_foreach()
 	do
 		case "$1" in
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			;;
 		--recursive)
-			recursive=1
+			recursive=$1
 			;;
 		-*)
 			usage
@@ -184,8 +184,8 @@ cmd_foreach()
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper foreach \
-		${quiet:+--quiet} \
-		${recursive:+--recursive} \
+		$quiet \
+		$recursive \
 		-- \
 		"$@"
 }
@@ -202,7 +202,7 @@ cmd_init()
 	do
 		case "$1" in
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			;;
 		--)
 			shift
@@ -219,7 +219,7 @@ cmd_init()
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper init \
-		${quiet:+--quiet} \
+		$quiet \
 		-- \
 		"$@"
 }
@@ -230,7 +230,6 @@ cmd_init()
 cmd_deinit()
 {
 	# parse $args after "submodule ... deinit".
-	deinit_all=
 	while test $# -ne 0
 	do
 		case "$1" in
@@ -238,10 +237,10 @@ cmd_deinit()
 			force=$1
 			;;
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			;;
 		--all)
-			deinit_all=t
+			deinit_all=$1
 			;;
 		--)
 			shift
@@ -258,9 +257,9 @@ cmd_deinit()
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit \
-		${quiet:+--quiet} \
-		${force:+--force} \
-		${deinit_all:+--all} \
+		$quiet \
+		$force \
+		$deinit_all \
 		-- \
 		"$@"
 }
@@ -277,31 +276,31 @@ cmd_update()
 	do
 		case "$1" in
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			;;
 		-v|--verbose)
-			quiet=0
+			quiet=
 			;;
 		--progress)
-			progress=1
+			progress=$1
 			;;
 		-i|--init)
-			init=1
+			init=$1
 			;;
 		--require-init)
-			require_init=1
+			require_init=$1
 			;;
 		--remote)
-			remote=1
+			remote=$1
 			;;
 		-N|--no-fetch)
-			nofetch=1
+			nofetch=$1
 			;;
 		-f|--force)
 			force=$1
 			;;
 		-r|--rebase)
-			rebase=1
+			rebase=$1
 			;;
 		--ref-format)
 			case "$2" in '') usage ;; esac
@@ -320,22 +319,19 @@ cmd_update()
 			reference="$1"
 			;;
 		--dissociate)
-			dissociate=1
+			dissociate=$1
 			;;
 		-m|--merge)
-			merge=1
+			merge=$1
 			;;
 		--recursive)
-			recursive=1
+			recursive=$1
 			;;
 		--checkout)
-			checkout=1
-			;;
-		--recommend-shallow)
-			recommend_shallow="--recommend-shallow"
+			checkout=$1
 			;;
-		--no-recommend-shallow)
-			recommend_shallow="--no-recommend-shallow"
+		--recommend-shallow|--no-recommend-shallow)
+			recommend_shallow=$1
 			;;
 		--depth)
 			case "$2" in '') usage ;; esac
@@ -343,24 +339,18 @@ cmd_update()
 			shift
 			;;
 		--depth=*)
-			depth=$1
+			depth="$1"
 			;;
 		-j|--jobs)
 			case "$2" in '') usage ;; esac
 			jobs="--jobs=$2"
 			shift
 			;;
-		-j*)
-			jobs="--jobs=${1#-j}"
-			;;
-		--jobs=*)
-			jobs=$1
+		-j*|--jobs=*)
+			jobs="$1"
 			;;
-		--single-branch)
-			single_branch="--single-branch"
-			;;
-		--no-single-branch)
-			single_branch="--no-single-branch"
+		--single-branch|--no-single-branch)
+			single_branch=$1
 			;;
 		--filter)
 			case "$2" in '') usage ;; esac
@@ -385,22 +375,21 @@ cmd_update()
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper update \
-		${quiet:+--quiet} \
-		${force:+--force} \
-		${progress:+"--progress"} \
-		${remote:+--remote} \
-		${recursive:+--recursive} \
-		${init:+--init} \
-		${nofetch:+--no-fetch} \
-		${rebase:+--rebase} \
-		${merge:+--merge} \
-		${checkout:+--checkout} \
+		$quiet \
+		$force \
+		$progress \
+		$remote \
+		$recursive \
+		$init \
+		$nofetch \
+		$rebase \
+		$merge \
+		$checkout \
 		${ref_format:+"$ref_format"} \
 		${reference:+"$reference"} \
-		${dissociate:+"--dissociate"} \
+		$dissociate \
 		${depth:+"$depth"} \
-		${require_init:+--require-init} \
-		${dissociate:+"--dissociate"} \
+		$require_init \
 		$single_branch \
 		$recommend_shallow \
 		$jobs \
@@ -415,9 +404,6 @@ cmd_update()
 # $@ = requested path
 #
 cmd_set_branch() {
-	default=
-	branch=
-
 	# parse $args after "submodule ... set-branch".
 	while test $# -ne 0
 	do
@@ -426,18 +412,15 @@ cmd_set_branch() {
 			# we don't do anything with this but we need to accept it
 			;;
 		-d|--default)
-			default=1
+			default=$1
 			;;
 		-b|--branch)
 			case "$2" in '') usage ;; esac
-			branch=$2
+			branch="--branch=$2"
 			shift
 			;;
-		-b*)
-			branch="${1#-b}"
-			;;
-		--branch=*)
-			branch="${1#--branch=}"
+		-b*|--branch=*)
+			branch="$1"
 			;;
 		--)
 			shift
@@ -454,9 +437,9 @@ cmd_set_branch() {
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper set-branch \
-		${quiet:+--quiet} \
-		${branch:+--branch "$branch"} \
-		${default:+--default} \
+		$quiet \
+		${branch:+"$branch"} \
+		$default \
 		-- \
 		"$@"
 }
@@ -472,7 +455,7 @@ cmd_set_url() {
 	do
 		case "$1" in
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			;;
 		--)
 			shift
@@ -489,7 +472,7 @@ cmd_set_url() {
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper set-url \
-		${quiet:+--quiet} \
+		$quiet \
 		-- \
 		"$@"
 }
@@ -503,32 +486,26 @@ cmd_set_url() {
 # $@ = [commit (default 'HEAD'),] requested paths (default all)
 #
 cmd_summary() {
-	summary_limit=-1
-	for_status=
-
 	# parse $args after "submodule ... summary".
 	while test $# -ne 0
 	do
 		case "$1" in
 		--cached)
-			cached=1
+			cached=$1
 			;;
 		--files)
-			files="$1"
+			files=$1
 			;;
 		--for-status)
-			for_status="$1"
+			for_status=$1
 			;;
 		-n|--summary-limit)
 			case "$2" in '') usage ;; esac
-			summary_limit="$2"
+			summary_limit="--summary-limit=$2"
 			shift
 			;;
-		-n*)
-			summary_limit="${1#-n}"
-			;;
-		--summary-limit=*)
-			summary_limit="${1#--summary-limit=}"
+		-n*|--summary-limit=*)
+			summary_limit="$1"
 			;;
 		--)
 			shift
@@ -545,10 +522,10 @@ cmd_summary() {
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper summary \
-		${files:+--files} \
-		${cached:+--cached} \
-		${for_status:+--for-status} \
-		${summary_limit:+-n "$summary_limit"} \
+		$files \
+		$cached \
+		$for_status \
+		${summary_limit:+"$summary_limit"} \
 		-- \
 		"$@"
 }
@@ -569,13 +546,13 @@ cmd_status()
 	do
 		case "$1" in
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			;;
 		--cached)
-			cached=1
+			cached=$1
 			;;
 		--recursive)
-			recursive=1
+			recursive=$1
 			;;
 		--)
 			shift
@@ -592,9 +569,9 @@ cmd_status()
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper status \
-		${quiet:+--quiet} \
-		${cached:+--cached} \
-		${recursive:+--recursive} \
+		$quiet \
+		$cached \
+		$recursive \
 		-- \
 		"$@"
 }
@@ -611,11 +588,11 @@ cmd_sync()
 	do
 		case "$1" in
 		-q|--quiet)
-			quiet=1
+			quiet=$1
 			shift
 			;;
 		--recursive)
-			recursive=1
+			recursive=$1
 			shift
 			;;
 		--)
@@ -632,8 +609,8 @@ cmd_sync()
 	done
 
 	git ${wt_prefix:+-C "$wt_prefix"} submodule--helper sync \
-		${quiet:+--quiet} \
-		${recursive:+--recursive} \
+		$quiet \
+		$recursive \
 		-- \
 		"$@"
 }
@@ -656,10 +633,10 @@ do
 		command=$1
 		;;
 	-q|--quiet)
-		quiet=1
+		quiet=$1
 		;;
 	--cached)
-		cached=1
+		cached=$1
 		;;
 	--)
 		break
-- 
2.30.2