git-sh-setup.sh: remove "say" function, change last users

Remove the "say" function, with various rewrites of the remaining
git-*.sh code to C and the preceding change to have git-submodule.sh
stop using the GIT_QUIET variable there were only four uses in
git-subtree.sh. Let's have it use an "arg_quiet" variable instead, and
move the "say" function over to it.

The only other use was a trivial message in git-instaweb.sh, since it
has never supported the --quiet option (or similar) that code added in
0b624b4cee (instaweb: restart server if already running, 2009-11-22)
can simply use "echo" instead.

The remaining in-tree hits from "say" are all for the sibling function
defined in t/test-lib.sh. It's safe to remove this function since it
has never been documented in Documentation/git-sh-setup.txt.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/subtree/git-subtree.sh

@@ -50,6 +50,14 @@ m,message=    use the given message as the commit message for the merge commit
 
 indent=0
 
+# Usage: say [MSG...]
+say () {
+	if test -z "$arg_quiet"
+	then
+		printf '%s\n' "$*"
+	fi
+}
+
 # Usage: debug [MSG...]
 debug () {
 	if test -n "$arg_debug"
@@ -60,7 +68,7 @@ debug () {
 
 # Usage: progress [MSG...]
 progress () {
-	if test -z "$GIT_QUIET"
+	if test -z "$arg_quiet"
 	then
 		if test -z "$arg_debug"
 		then
@@ -146,6 +154,7 @@ main () {
 	eval "$set_args"
 
 	# Begin "real" flag parsing.
+	arg_quiet=
 	arg_debug=
 	arg_prefix=
 	arg_split_branch=
@@ -161,7 +170,7 @@ main () {
 
 		case "$opt" in
 		-q)
-			GIT_QUIET=1
+			arg_quiet=1
 			;;
 		-d)
 			arg_debug=1
@@ -252,7 +261,7 @@ main () {
 	dir="$(dirname "$arg_prefix/.")"
 
 	debug "command: {$arg_command}"
-	debug "quiet: {$GIT_QUIET}"
+	debug "quiet: {$arg_quiet}"
 	debug "dir: {$dir}"
 	debug "opts: {$*}"
 	debug

git-instaweb.sh

@@ -102,7 +102,7 @@ resolve_full_httpd () {
 
 start_httpd () {
 	if test -f "$fqgitdir/pid"; then
-		say "Instance already running. Restarting..."
+		echo "Instance already running. Restarting..."
 		stop_httpd
 	fi
 

git-sh-setup.sh

@@ -57,15 +57,6 @@ die_with_status () {
 	exit "$status"
 }
 
-GIT_QUIET=
-
-say () {
-	if test -z "$GIT_QUIET"
-	then
-		printf '%s\n' "$*"
-	fi
-}
-
 if test -n "$OPTIONS_SPEC"; then
 	usage() {
 		"$0" -h