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builtin-grep: tighten argument parsing.

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I mistyped

	git grep next -e '"^@"' '*.c'

and got many hits that contain "next" without complaint.
Obviously what I meant to say was:

	git grep -e '"^@"' next -- '*.c'

This tightens the argument parsing rule a bit:

 - All "grep" parameters should come first;

 - If there is no -e nor -f to specify pattern, the first non
   option string is the parameter;

 - After that, zero or more revs can follow.

 - An optional '--' can be present, and is skipped.

 - All the rest are pathspecs.  If '--' was not there, they must
   be paths that exist in the working tree.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-05-08 23:55:47 -07:00
parent 1c57119c70
commit 5acd64edec
1 changed files with 50 additions and 26 deletions
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76
builtin-grep.c
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@ -494,20 +494,30 @@ static const char builtin_grep_usage[] =
int cmd_grep(int argc, const char **argv, char **envp)
{
int hit = 0;
int no_more_flags = 0;
int cached = 0;
int seen_dashdash = 0;
struct grep_opt opt;
struct object_list *list, **tail, *object_list = NULL;
const char *prefix = setup_git_directory();
const char **paths = NULL;
int i;
memset(&opt, 0, sizeof(opt));
opt.pattern_tail = &opt.pattern_list;
opt.regflags = REG_NEWLINE;
/*
* No point using rev_info, really.
* If there is no -- then the paths must exist in the working
* tree. If there is no explicit pattern specified with -e or
* -f, we take the first unrecognized non option to be the
* pattern, but then what follows it must be zero or more
* valid refs up to the -- (if exists), and then existing
* paths. If there is an explicit pattern, then the first
* unrecocnized non option is the beginning of the refs list
* that continues up to the -- (if exists), and then paths.
*/
tail = &object_list;
while (1 < argc) {
const char *arg = argv[1];
argc--; argv++;
@ -618,7 +628,7 @@ int cmd_grep(int argc, const char **argv, char **envp)
usage(builtin_grep_usage);
patterns = fopen(argv[1], "r");
if (!patterns)
die("'%s': %s", strerror(errno));
die("'%s': %s", argv[1], strerror(errno));
while (fgets(buf, sizeof(buf), patterns)) {
int len = strlen(buf);
if (buf[len-1] == '\n')
@ -642,47 +652,61 @@ int cmd_grep(int argc, const char **argv, char **envp)
}
usage(builtin_grep_usage);
}
if (!strcmp("--", arg)) {
no_more_flags = 1;
continue;
}
/* Either unrecognized option or a single pattern */
if (!no_more_flags && *arg == '-')
if (!strcmp("--", arg))
break;
if (*arg == '-')
usage(builtin_grep_usage);
/* First unrecognized non-option token */
if (!opt.pattern_list) {
add_pattern(&opt, arg, "command line", 0);
break;
}
else {
/* We are looking at the first path or rev;
* it is found at argv[0] after leaving the
* it is found at argv[1] after leaving the
* loop.
*/
argc++; argv--;
break;
}
}
if (!opt.pattern_list)
die("no pattern given.");
compile_patterns(&opt);
tail = &object_list;
while (1 < argc) {
struct object *object;
struct object_list *elem;
const char *arg = argv[1];
/* Check revs and then paths */
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
unsigned char sha1[20];
if (get_sha1(arg, sha1) < 0)
break;
object = parse_object(sha1);
if (!object)
die("bad object %s", arg);
elem = object_list_insert(object, tail);
elem->name = arg;
tail = &elem->next;
argc--; argv++;
/* Is it a rev? */
if (!get_sha1(arg, sha1)) {
struct object *object = parse_object(sha1);
struct object_list *elem;
if (!object)
die("bad object %s", arg);
elem = object_list_insert(object, tail);
elem->name = arg;
tail = &elem->next;
continue;
}
if (!strcmp(arg, "--")) {
i++;
seen_dashdash = 1;
}
break;
}
if (1 < argc)
paths = get_pathspec(prefix, argv + 1);
/* The rest are paths */
if (!seen_dashdash) {
int j;
for (j = i; j < argc; i++)
verify_filename(prefix, argv[j]);
}
if (i < argc)
paths = get_pathspec(prefix, argv + i);
else if (prefix) {
paths = xcalloc(2, sizeof(const char *));
paths[0] = prefix;