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From: "ZheNing Hu via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Christian Couder <christian.couder@gmail.com>,
	Junio C Hamano <gitster@pobox.com>,
	ZheNing Hu <adlternative@gmail.com>,
	ZheNing Hu <adlternative@gmail.com>
Subject: [PATCH v5 1/2] [GSOC] run-command: add shell_no_implicit_args option
Date: Wed, 31 Mar 2021 10:05:46 +0000	[thread overview]
Message-ID: <4c59cab53a0d9bb7c9cccfaf5544ae5c904bb2ba.1617185147.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.913.v5.git.1617185147.gitgitgadget@gmail.com>

From: ZheNing Hu <adlternative@gmail.com>

When we use subprocess to run a shell-script, if we have any
args, git will add extra $@ to the end of the shell-script,
This can pass positional parameters correctly, But if we just
want to use some of these passed parameters, git will still
add an extra "$@", which contains all positional parameters we
passed. This does not meet our expectations.

E.g. our shell-script is:
"echo \"\$1\""
and pass $1 "abc", git will change our script to:
"echo \"\$1\" \"$@\""

The positional parameters we entered will be printed
repeatedly. So let add a new `shell_no_implicit_args`
to `struct child_process`, which can suppress the
joining of $@ if `shell_no_implicit_args` is set to 1,
this will allow us to use only few of positional args
in multi-parameter shell script, instead of using all
of them.

Signed-off-by: ZheNing Hu <adlternative@gmail.com>
---
 run-command.c | 8 ++++----
 run-command.h | 1 +
 trailer.c     | 1 +
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/run-command.c b/run-command.c
index be6bc128cd9d..a2cf6177f522 100644
--- a/run-command.c
+++ b/run-command.c
@@ -264,7 +264,7 @@ int sane_execvp(const char *file, char * const argv[])
 	return -1;
 }
 
-static const char **prepare_shell_cmd(struct strvec *out, const char **argv)
+static const char **prepare_shell_cmd(struct strvec *out, const char **argv, int shell_no_implicit_args)
 {
 	if (!argv[0])
 		BUG("shell command is empty");
@@ -281,7 +281,7 @@ static const char **prepare_shell_cmd(struct strvec *out, const char **argv)
 		 * If we have no extra arguments, we do not even need to
 		 * bother with the "$@" magic.
 		 */
-		if (!argv[1])
+		if (!argv[1] || shell_no_implicit_args)
 			strvec_push(out, argv[0]);
 		else
 			strvec_pushf(out, "%s \"$@\"", argv[0]);
@@ -416,7 +416,7 @@ static int prepare_cmd(struct strvec *out, const struct child_process *cmd)
 	if (cmd->git_cmd) {
 		prepare_git_cmd(out, cmd->argv);
 	} else if (cmd->use_shell) {
-		prepare_shell_cmd(out, cmd->argv);
+		prepare_shell_cmd(out, cmd->argv, cmd->shell_no_implicit_args);
 	} else {
 		strvec_pushv(out, cmd->argv);
 	}
@@ -929,7 +929,7 @@ int start_command(struct child_process *cmd)
 	if (cmd->git_cmd)
 		cmd->argv = prepare_git_cmd(&nargv, cmd->argv);
 	else if (cmd->use_shell)
-		cmd->argv = prepare_shell_cmd(&nargv, cmd->argv);
+		cmd->argv = prepare_shell_cmd(&nargv, cmd->argv, cmd->shell_no_implicit_args);
 
 	cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, (char**) cmd->env,
 			cmd->dir, fhin, fhout, fherr);
diff --git a/run-command.h b/run-command.h
index d08414a92e73..9597c987c5bb 100644
--- a/run-command.h
+++ b/run-command.h
@@ -133,6 +133,7 @@ struct child_process {
 	 * argv[1], etc, do not need to be shell-quoted.
 	 */
 	unsigned use_shell:1;
+	unsigned shell_no_implicit_args:1;
 
 	unsigned stdout_to_stderr:1;
 	unsigned clean_on_exit:1;
diff --git a/trailer.c b/trailer.c
index be4e9726421c..35dd0f4c8512 100644
--- a/trailer.c
+++ b/trailer.c
@@ -231,6 +231,7 @@ static char *apply_command(const char *command, const char *arg)
 	cp.env = local_repo_env;
 	cp.no_stdin = 1;
 	cp.use_shell = 1;
+	cp.shell_no_implicit_args = 1;
 
 	if (capture_command(&cp, &buf, 1024)) {
 		error(_("running trailer command '%s' failed"), cmd.buf);
-- 
gitgitgadget


  reply	other threads:[~2021-03-31 10:06 UTC|newest]

Thread overview: 101+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23 14:53 [PATCH] [GSOC]trailer: change $ARG to environment variable ZheNing Hu via GitGitGadget
2021-03-24 15:42 ` [PATCH v2] [GSOC]trailer: pass arg as positional parameter ZheNing Hu via GitGitGadget
2021-03-24 20:18   ` Junio C Hamano
2021-03-25  1:43     ` ZheNing Hu
2021-03-25 11:53   ` [PATCH v3] " ZheNing Hu via GitGitGadget
2021-03-25 22:28     ` Junio C Hamano
2021-03-26 13:29       ` ZheNing Hu
2021-03-26 16:13     ` [PATCH v4] " ZheNing Hu via GitGitGadget
2021-03-27 18:04       ` Junio C Hamano
2021-03-27 19:53         ` Christian Couder
2021-03-28 10:46           ` ZheNing Hu
2021-03-29  9:04             ` Christian Couder
2021-03-29 13:43               ` ZheNing Hu
2021-03-30  8:45                 ` Christian Couder
2021-03-30 11:22                   ` ZheNing Hu
2021-03-30 15:07                     ` ZheNing Hu
2021-03-30 17:14                       ` Junio C Hamano
2021-03-31  5:14                         ` ZheNing Hu
2021-03-31 18:19                           ` Junio C Hamano
2021-03-31 18:29                             ` Junio C Hamano
2021-04-01  3:56                               ` ZheNing Hu
2021-04-01 19:49                                 ` Junio C Hamano
2021-04-02  2:08                                   ` ZheNing Hu
2021-04-01  3:39                             ` ZheNing Hu
2021-03-31 10:05       ` [PATCH v5 0/2] " ZheNing Hu via GitGitGadget
2021-03-31 10:05         ` ZheNing Hu via GitGitGadget [this message]
2021-04-01  7:22           ` [PATCH v5 1/2] [GSOC] run-command: add shell_no_implicit_args option Christian Couder
2021-04-01  9:58             ` ZheNing Hu
2021-03-31 10:05         ` [PATCH v5 2/2] [GSOC]trailer: pass arg as positional parameter ZheNing Hu via GitGitGadget
2021-04-01  7:28         ` [PATCH v5 0/2] " Christian Couder
2021-04-01 10:02           ` ZheNing Hu
2021-04-02 13:26         ` [PATCH v6] [GSOC] trailer: add new trailer.<token>.cmd config option ZheNing Hu via GitGitGadget
2021-04-02 20:48           ` Junio C Hamano
2021-04-03  5:08             ` ZheNing Hu
2021-04-04  5:34               ` Junio C Hamano
2021-04-03  5:51             ` Christian Couder
2021-04-04 23:26               ` Junio C Hamano
2021-04-06  3:47                 ` Christian Couder
2021-04-06  3:52                   ` Christian Couder
2021-04-06  5:16                     ` ZheNing Hu
2021-04-06  5:34                       ` Junio C Hamano
2021-04-06  5:37                       ` Junio C Hamano
2021-04-04  5:43             ` ZheNing Hu
2021-04-04  8:52               ` Christian Couder
2021-04-04  9:53                 ` ZheNing Hu
2021-04-02 23:44           ` Junio C Hamano
2021-04-03  3:22             ` ZheNing Hu
2021-04-03  4:31               ` Junio C Hamano
2021-04-03  5:15                 ` ZheNing Hu
2021-04-04 13:11           ` [PATCH v7] " ZheNing Hu via GitGitGadget
2021-04-06 16:23             ` Christian Couder
2021-04-07  4:51               ` ZheNing Hu
2021-04-09 13:37             ` [PATCH v8 0/2] [GSOC] trailer: add new .cmd " ZheNing Hu via GitGitGadget
2021-04-09 13:37               ` [PATCH v8 1/2] [GSOC] docs: correct descript of trailer.<token>.command ZheNing Hu via GitGitGadget
2021-04-09 19:02                 ` Christian Couder
2021-04-10 13:40                   ` ZheNing Hu
2021-04-09 13:37               ` [PATCH v8 2/2] [GSOC] trailer: add new .cmd config option ZheNing Hu via GitGitGadget
2021-04-09 20:18                 ` Christian Couder
2021-04-10 14:09                   ` ZheNing Hu
2021-04-09 19:59               ` [PATCH v8 0/2] " Christian Couder
2021-04-12 16:39               ` [PATCH v9 " ZheNing Hu via GitGitGadget
2021-04-12 16:39                 ` [PATCH v9 1/2] [GSOC] docs: correct descript of trailer.<token>.command ZheNing Hu via GitGitGadget
2021-04-12 20:42                   ` Junio C Hamano
2021-04-16 12:03                     ` Christian Couder
2021-04-17  1:54                       ` Junio C Hamano
2021-04-12 16:39                 ` [PATCH v9 2/2] [GSOC] trailer: add new .cmd config option ZheNing Hu via GitGitGadget
2021-04-12 20:51                   ` Junio C Hamano
2021-04-13  7:33                     ` Christian Couder
2021-04-13 12:02                       ` ZheNing Hu
2021-04-13 19:18                         ` Junio C Hamano
2021-04-14 13:27                           ` ZheNing Hu
2021-04-14 20:33                             ` Junio C Hamano
2021-04-15 15:32                               ` ZheNing Hu
2021-04-15 17:41                                 ` Junio C Hamano
2021-04-16 12:54                               ` Christian Couder
2021-04-13 18:14                       ` Junio C Hamano
2021-04-16  8:47                 ` [PATCH v10 0/2] " ZheNing Hu via GitGitGadget
2021-04-16  8:47                   ` [PATCH v10 1/2] [GSOC] docs: correct descript of trailer.<token>.command ZheNing Hu via GitGitGadget
2021-04-16 19:11                     ` Junio C Hamano
2021-04-16  8:47                   ` [PATCH v10 2/2] [GSOC] trailer: add new .cmd config option ZheNing Hu via GitGitGadget
2021-04-16 19:13                     ` Junio C Hamano
2021-04-16 19:21                     ` Junio C Hamano
2021-04-16 19:25                       ` Junio C Hamano
2021-04-17  2:58                         ` Junio C Hamano
2021-04-17  3:36                           ` Junio C Hamano
2021-04-17  7:41                             ` ZheNing Hu
2021-04-17  8:11                               ` Junio C Hamano
2021-04-17 15:13                   ` [PATCH v11 0/2] " ZheNing Hu via GitGitGadget
2021-04-17 15:13                     ` [PATCH v11 1/2] [GSOC] docs: correct description of .command ZheNing Hu via GitGitGadget
2021-04-17 15:13                     ` [PATCH v11 2/2] [GSOC] trailer: add new .cmd config option ZheNing Hu via GitGitGadget
2021-04-17 22:26                     ` [PATCH v11 0/2] " Junio C Hamano
2021-04-18  7:47                       ` ZheNing Hu
2021-04-21  0:09                         ` Junio C Hamano
2021-04-21  5:47                           ` ZheNing Hu
2021-04-21 23:40                             ` Junio C Hamano
2021-04-22  9:20                               ` ZheNing Hu
2021-04-27  6:49                                 ` Junio C Hamano
2021-04-27 12:24                                   ` ZheNing Hu
2021-05-03 15:41                     ` [PATCH v12 " ZheNing Hu via GitGitGadget
2021-05-03 15:41                       ` [PATCH v12 1/2] [GSOC] docs: correct descript of trailer.<token>.command ZheNing Hu via GitGitGadget
2021-05-03 15:41                       ` [PATCH v12 2/2] [GSOC] trailer: add new .cmd config option ZheNing Hu via GitGitGadget

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