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Exec git programs without using PATH.

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The git suite may not be in PATH (and thus programs such as
git-send-pack could not exec git-rev-list).  Thus there is a need for
logic that will locate these programs.  Modifying PATH is not
desirable as it result in behavior differing from the user's
intentions, as we may end up prepending "/usr/bin" to PATH.

- git C programs will use exec*_git_cmd() APIs to exec sub-commands.
- exec*_git_cmd() will execute a git program by searching for it in
  the following directories:
	1. --exec-path (as used by "git")
	2. The GIT_EXEC_PATH environment variable.
	3. $(gitexecdir) as set in Makefile (default value $(bindir)).
- git wrapper will modify PATH as before to enable shell scripts to
  invoke "git-foo" commands.

Ideally, shell scripts should use the git wrapper to become independent
of PATH, and then modifying PATH will not be necessary.

[jc: with minor updates after a brief review.]

Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Michal Ostrowski
2006-01-10 21:12:17 -05:00
committed by Junio C Hamano
parent c884dd9a54
commit 77cb17e940
12 changed files with 176 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
send-pack.c
View File

@ -3,6 +3,7 @@
#include "tag.h"
#include "refs.h"
#include "pkt-line.h"
#include "exec_cmd.h"
static const char send_pack_usage[] =
"git-send-pack [--all] [--exec=git-receive-pack] <remote> [<head>...]\n"
@ -26,11 +27,11 @@ static int is_zero_sha1(const unsigned char *sha1)
static void exec_pack_objects(void)
{
static char *args[] = {
"git-pack-objects",
"pack-objects",
"--stdout",
NULL
};
execvp("git-pack-objects", args);
execv_git_cmd(args);
die("git-pack-objects exec failed (%s)", strerror(errno));
}
@ -39,7 +40,7 @@ static void exec_rev_list(struct ref *refs)
static char *args[1000];
int i = 0;
args[i++] = "git-rev-list"; /* 0 */
args[i++] = "rev-list"; /* 0 */
args[i++] = "--objects"; /* 1 */
while (refs) {
char *buf = malloc(100);
@ -58,7 +59,7 @@ static void exec_rev_list(struct ref *refs)
refs = refs->next;
}
args[i] = NULL;
execvp("git-rev-list", args);
execv_git_cmd(args);
die("git-rev-list exec failed (%s)", strerror(errno));
}