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execv_dashed_external: use child_process struct 

When we run a dashed external, we use the one-liner
run_command_v_opt() to do so. Let's switch to using a
child_process struct, which has two advantages:

  1. We can drop all of the allocation and cleanup code for
     building our custom argv array, and just rely on the
     builtin argv_array (at the minor cost of doing a few
     extra mallocs).

  2. We have access to the complete range of child_process
     options, not just the ones that the "_opt()" form can
     forward.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2017-01-06 20:16:24 -05:00 committed by Junio C Hamano
parent a274e0a036
commit 2b296c93d4
1 changed files with 7 additions and 18 deletions
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git.c
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@ -575,8 +575,7 @@ static void handle_builtin(int argc, const char **argv)
static void execv_dashed_external(const char **argv)
{
struct strbuf cmd = STRBUF_INIT;
const char *tmp;
struct child_process cmd = CHILD_PROCESS_INIT;
int status;
if (get_super_prefix())
@ -586,30 +585,20 @@ static void execv_dashed_external(const char **argv)
use_pager = check_pager_config(argv[0]);
commit_pager_choice();
strbuf_addf(&cmd, "git-%s", argv[0]);
argv_array_pushf(&cmd.args, "git-%s", argv[0]);
argv_array_pushv(&cmd.args, argv + 1);
cmd.clean_on_exit = 1;
cmd.silent_exec_failure = 1;
/*
* argv[0] must be the git command, but the argv array
* belongs to the caller, and may be reused in
* subsequent loop iterations. Save argv[0] and
* restore it on error.
*/
tmp = argv[0];
argv[0] = cmd.buf;
trace_argv_printf(argv, "trace: exec:");
trace_argv_printf(cmd.args.argv, "trace: exec:");
/*
* if we fail because the command is not found, it is
* OK to return. Otherwise, we just pass along the status code.
*/
status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE | RUN_CLEAN_ON_EXIT);
status = run_command(&cmd);
if (status >= 0 || errno != ENOENT)
exit(status);
argv[0] = tmp;
strbuf_release(&cmd);
}
static int run_argv(int *argcp, const char ***argv)