[PATCH v3 2/2] pathspec: convert no-glob warn to advice

[Stavros Ntentos <stdedos@gmail.com>]

Teach git that, if anyone wants to squelch such warning,
can do so via `git config advice.starStarNoGlobPathspec false`
---
 Documentation/config/advice.txt | 4 ++++
 advice.c                        | 3 +++
 advice.h                        | 2 ++
 pathspec.c                      | 6 ++++--
 t/t6130-pathspec-noglob.sh      | 4 +++-
 5 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/Documentation/config/advice.txt b/Documentation/config/advice.txt
index acbd0c09aa..35aa36cfa1 100644
--- a/Documentation/config/advice.txt
+++ b/Documentation/config/advice.txt
@@ -119,4 +119,8 @@ advice.*::
 	addEmptyPathspec::
 		Advice shown if a user runs the add command without providing
 		the pathspec parameter.
+	starStarNoGlobPathspec::
+		Advice shown if a user provides a pathspec via the terminal
+		that contains `**`, anticipating that the pattern will be
+		matched using wildmatch (aka `:(glob)` magic).
 --
diff --git a/advice.c b/advice.c
index 164742305f..5703bfba86 100644
--- a/advice.c
+++ b/advice.c
@@ -33,6 +33,7 @@ int advice_checkout_ambiguous_remote_branch_name = 1;
 int advice_submodule_alternate_error_strategy_die = 1;
 int advice_add_ignored_file = 1;
 int advice_add_empty_pathspec = 1;
+int advice_star_star_no_glob_pathspec = 1;
 
 static int advice_use_color = -1;
 static char advice_colors[][COLOR_MAXLEN] = {
@@ -95,6 +96,7 @@ static struct {
 	{ "submoduleAlternateErrorStrategyDie", &advice_submodule_alternate_error_strategy_die },
 	{ "addIgnoredFile", &advice_add_ignored_file },
 	{ "addEmptyPathspec", &advice_add_empty_pathspec },
+	{ "starStarNoGlobPathspec", &advice_star_star_no_glob_pathspec },
 
 	/* make this an alias for backward compatibility */
 	{ "pushNonFastForward", &advice_push_update_rejected }
@@ -137,6 +139,7 @@ static struct {
 	[ADVICE_STATUS_U_OPTION]			= { "statusUoption", 1 },
 	[ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE] = { "submoduleAlternateErrorStrategyDie", 1 },
 	[ADVICE_WAITING_FOR_EDITOR]			= { "waitingForEditor", 1 },
+	[ADVICE_STAR_STAR_NO_GLOB_PATHSPEC]		= { "starStarNoGlobPathspec", 1 },
 };
 
 static const char turn_off_instructions[] =
diff --git a/advice.h b/advice.h
index bc2432980a..c62fb47434 100644
--- a/advice.h
+++ b/advice.h
@@ -33,6 +33,7 @@ extern int advice_checkout_ambiguous_remote_branch_name;
 extern int advice_submodule_alternate_error_strategy_die;
 extern int advice_add_ignored_file;
 extern int advice_add_empty_pathspec;
+extern int advice_star_star_no_glob_pathspec;
 
 /*
  * To add a new advice, you need to:
@@ -72,6 +73,7 @@ extern int advice_add_empty_pathspec;
 	ADVICE_STATUS_U_OPTION,
 	ADVICE_SUBMODULE_ALTERNATE_ERROR_STRATEGY_DIE,
 	ADVICE_WAITING_FOR_EDITOR,
+	ADVICE_STAR_STAR_NO_GLOB_PATHSPEC,
 };
 
 int git_default_advice_config(const char *var, const char *value);
diff --git a/pathspec.c b/pathspec.c
index d5b9c0d792..879d87260d 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -1,4 +1,4 @@
-#include <string.h>
+#include "git-compat-util.h"
 #include "cache.h"
 #include "config.h"
 #include "dir.h"
@@ -744,11 +744,13 @@ int match_pathspec_attrs(const struct index_state *istate,
 }
 
 void check_missing_glob(const char *pathspec_entry, int flags) {
+	const char *advice = NULL;
 	if (flags & (PATHSPEC_GLOB | PATHSPEC_LITERAL)) {
 		return;
 	}
 
+	advice = _("Pathspec provided contains `**`, but no :(glob) magic.\nIt will not match 0 or more directories!");
 	if (strstr(pathspec_entry, "**")) {
-		warning(_("Pathspec provided contains `**`, but no :(glob) magic.\nIt will not match 0 or more directories!"));
+		advise_if_enabled(ADVICE_STAR_STAR_NO_GLOB_PATHSPEC, advice);
 	}
 }
diff --git a/t/t6130-pathspec-noglob.sh b/t/t6130-pathspec-noglob.sh
index af6cd16f76..0482030243 100755
--- a/t/t6130-pathspec-noglob.sh
+++ b/t/t6130-pathspec-noglob.sh
@@ -158,7 +158,9 @@ test_expect_success '**/ does not work with :(literal) and --glob-pathspecs' '
 '
 
 cat > expected <<"EOF"
-warning: Pathspec provided contains `**`, but no :(glob) magic.
+hint: Pathspec provided contains `**`, but no :(glob) magic.
+hint: It will not match 0 or more directories!
+hint: Disable this message with "git config advice.starStarNoGlobPathspec false"
 EOF
 test_expect_success '** without :(glob) warns of lacking glob magic' '
 	test_might_fail git stash -- "**/bar" 2>warns &&
-- 
2.31.0