[PATCH] stash: added safety flag for stash clear subcommand

["Nadav Goldstein via GitGitGadget" <gitgitgadget@gmail.com>]

From: Nadav Goldstein <nadav.goldstein@blazepod.co>

Introduced a flag (git stash clear -i) when when used,
instead of silently clearing the stash, will present a
confirmation to the user regarding the action which he's
about to perform. Took the inspiration from rm -rf -i flag.
This flag also outputs extra logs (abort/success) to let
the user know more "interactively" what is happening with
the stash (hence the flag name).

Signed-off-by: Nadav Goldstein <nadav.goldstein@blazepod.co>
---
    stash clear: added safety flag for stash clear subcommand
    
    Added a flag to git stash clear (-i|--interactive), which prompts the
    user to confirm he indeed wants to clear the stash, otherwise it will
    abort.
    
    I found it useful as a frequent stash clear user which means my terminal
    always have it in recent commands, which could mean accidental erase of
    work. This flag ensures accidental fires won't clear hard work :)
    
    I also thought it would be better to do it opt in, to not change the way
    the command works in prod, only add to it.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1232%2Fnadav96%2Fclear-stash-prompt-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1232/nadav96/clear-stash-prompt-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/1232

 Documentation/git-stash.txt |  9 +++++++--
 builtin/stash.c             | 21 +++++++++++++++++++--
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/Documentation/git-stash.txt b/Documentation/git-stash.txt
index 6e15f475257..a7ab5379779 100644
--- a/Documentation/git-stash.txt
+++ b/Documentation/git-stash.txt
@@ -17,7 +17,7 @@ SYNOPSIS
 	     [-u|--include-untracked] [-a|--all] [-m|--message <message>]
 	     [--pathspec-from-file=<file> [--pathspec-file-nul]]
 	     [--] [<pathspec>...]]
-'git stash' clear
+'git stash' clear [-i|--interactive]
 'git stash' create [<message>]
 'git stash' store [-m|--message <message>] [-q|--quiet] <commit>
 
@@ -127,7 +127,7 @@ the stash entry is applied on top of the commit that was HEAD at the
 time `git stash` was run, it restores the originally stashed state
 with no conflicts.
 
-clear::
+clear [-i|--interactive]::
 	Remove all the stash entries. Note that those entries will then
 	be subject to pruning, and may be impossible to recover (see
 	'Examples' below for a possible strategy).
@@ -160,6 +160,11 @@ OPTIONS
 All ignored and untracked files are also stashed and then cleaned
 up with `git clean`.
 
+-i::
+--interactive::
+	This option is only valid for clear command, when applied, will request
+	a confirmation from the user before proceeding to clear the stash.
+
 -u::
 --include-untracked::
 --no-include-untracked::
diff --git a/builtin/stash.c b/builtin/stash.c
index 0c7b6a95882..b012d24ef38 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -26,7 +26,7 @@ static const char * const git_stash_usage[] = {
 	N_("git stash drop [-q|--quiet] [<stash>]"),
 	N_("git stash ( pop | apply ) [--index] [-q|--quiet] [<stash>]"),
 	N_("git stash branch <branchname> [<stash>]"),
-	"git stash clear",
+	"git stash clear [-i|--interactive]",
 	N_("git stash [push [-p|--patch] [-S|--staged] [-k|--[no-]keep-index] [-q|--quiet]\n"
 	   "          [-u|--include-untracked] [-a|--all] [-m|--message <message>]\n"
 	   "          [--pathspec-from-file=<file> [--pathspec-file-nul]]\n"
@@ -67,7 +67,7 @@ static const char * const git_stash_branch_usage[] = {
 };
 
 static const char * const git_stash_clear_usage[] = {
-	"git stash clear",
+	"git stash clear [-i|--interactive]",
 	NULL
 };
 
@@ -215,7 +215,10 @@ static int do_clear_stash(void)
 
 static int clear_stash(int argc, const char **argv, const char *prefix)
 {
+	int is_prompt;
 	struct option options[] = {
+		OPT_BOOL('i', "interactive", &is_prompt,
+			 N_("confirm clearing stash")),
 		OPT_END()
 	};
 
@@ -226,7 +229,21 @@ static int clear_stash(int argc, const char **argv, const char *prefix)
 	if (argc)
 		return error(_("git stash clear with arguments is "
 			       "unimplemented"));
+	if (is_prompt == 1) {
+		char code[2];
+		printf("Are you sure you want to clear your stash? [y/N]: ");
+		if (fgets(code, 2, stdin) != NULL) {
+			if (code[0] == 'y' || code[0] == 'Y') {
+				printf_ln(_("Clearing stash"));
+				return do_clear_stash();
+			}
+			else {
+				printf_ln(_("Aborting clear"));
+			}
+		}
 
+		return 0;
+	}
 	return do_clear_stash();
 }
 

base-commit: e8005e4871f130c4e402ddca2032c111252f070a
-- 
gitgitgadget