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v0.5.1
Revision 4ecbc178704ca6c1027a38483e98f5fe493b1322 authored by Jeff King on 09 July 2009, 06:37:35 UTC, committed by Junio C Hamano on 09 July 2009, 08:19:51 UTC 
Makefile: install 'git' in execdir
 
When a git command executes a subcommand, it uses the "git
foo" form, which relies on finding "git" in the PATH.
Normally this should not be a problem, since the same "git"
that was used to invoke git in the first place will be
found.  And if somebody invokes a "git" outside of the PATH
(e.g., by giving its absolute path), this case is already
covered: we put that absolute path onto the front of PATH.

However, if one is using "sudo", then sudo will execute the
"git" from the PATH, but pass along a restricted PATH that
may not contain the original "git" directory. In this case,
executing a subcommand will fail.

To solve this, we put the "git" wrapper itself into the
execdir; this directory is prepended to the PATH when git
starts, so the wrapper will always be found.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 3125be1
Raw File
merge-index.c 
#include "cache.h"
#include "run-command.h"
#include "exec_cmd.h"

static const char *pgm;
static int one_shot, quiet;
static int err;

static int merge_entry(int pos, const char *path)
{
	int found;
	const char *arguments[] = { pgm, "", "", "", path, "", "", "", NULL };
	char hexbuf[4][60];
	char ownbuf[4][60];

	if (pos >= active_nr)
		die("git merge-index: %s not in the cache", path);
	found = 0;
	do {
		struct cache_entry *ce = active_cache[pos];
		int stage = ce_stage(ce);

		if (strcmp(ce->name, path))
			break;
		found++;
		strcpy(hexbuf[stage], sha1_to_hex(ce->sha1));
		sprintf(ownbuf[stage], "%o", ce->ce_mode);
		arguments[stage] = hexbuf[stage];
		arguments[stage + 4] = ownbuf[stage];
	} while (++pos < active_nr);
	if (!found)
		die("git merge-index: %s not in the cache", path);

	if (run_command_v_opt(arguments, 0)) {
		if (one_shot)
			err++;
		else {
			if (!quiet)
				die("merge program failed");
			exit(1);
		}
	}
	return found;
}

static void merge_file(const char *path)
{
	int pos = cache_name_pos(path, strlen(path));

	/*
	 * If it already exists in the cache as stage0, it's
	 * already merged and there is nothing to do.
	 */
	if (pos < 0)
		merge_entry(-pos-1, path);
}

static void merge_all(void)
{
	int i;
	for (i = 0; i < active_nr; i++) {
		struct cache_entry *ce = active_cache[i];
		if (!ce_stage(ce))
			continue;
		i += merge_entry(i, ce->name)-1;
	}
}

int main(int argc, char **argv)
{
	int i, force_file = 0;

	/* Without this we cannot rely on waitpid() to tell
	 * what happened to our children.
	 */
	signal(SIGCHLD, SIG_DFL);

	if (argc < 3)
		usage("git merge-index [-o] [-q] <merge-program> (-a | [--] <filename>*)");

	git_extract_argv0_path(argv[0]);

	setup_git_directory();
	read_cache();

	i = 1;
	if (!strcmp(argv[i], "-o")) {
		one_shot = 1;
		i++;
	}
	if (!strcmp(argv[i], "-q")) {
		quiet = 1;
		i++;
	}
	pgm = argv[i++];
	for (; i < argc; i++) {
		char *arg = argv[i];
		if (!force_file && *arg == '-') {
			if (!strcmp(arg, "--")) {
				force_file = 1;
				continue;
			}
			if (!strcmp(arg, "-a")) {
				merge_all();
				continue;
			}
			die("git merge-index: unknown option %s", arg);
		}
		merge_file(arg);
	}
	if (err && !quiet)
		die("merge program failed");
	return err;
}
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