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git-grep: use a bit more specific error messages.

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Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-07-04 02:44:48 -07:00
parent fcfe34b5ac
commit 088b084bbb
1 changed files with 11 additions and 4 deletions
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15
builtin-grep.c
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@ -657,6 +657,13 @@ static int grep_object(struct grep_opt *opt, const char **paths,
static const char builtin_grep_usage[] =
"git-grep <option>* <rev>* [-e] <pattern> [<path>...]";
static const char emsg_invalid_context_len[] =
"%s: invalid context length argument";
static const char emsg_missing_context_len[] =
"missing context length argument";
static const char emsg_missing_argument[] =
"option requires an argument -%s";
int cmd_grep(int argc, const char **argv, char **envp)
{
int hit = 0;
@ -764,7 +771,7 @@ int cmd_grep(int argc, const char **argv, char **envp)
case 'A': case 'B': case 'C':
if (!arg[2]) {
if (argc <= 1)
usage(builtin_grep_usage);
die(emsg_missing_context_len);
scan = *++argv;
argc--;
}
@ -776,7 +783,7 @@ int cmd_grep(int argc, const char **argv, char **envp)
break;
}
if (sscanf(scan, "%u", &num) != 1)
usage(builtin_grep_usage);
die(emsg_invalid_context_len, scan);
switch (arg[1]) {
case 'A':
opt.post_context = num;
@ -795,7 +802,7 @@ int cmd_grep(int argc, const char **argv, char **envp)
int lno = 0;
char buf[1024];
if (argc <= 1)
usage(builtin_grep_usage);
die(emsg_missing_argument, arg);
patterns = fopen(argv[1], "r");
if (!patterns)
die("'%s': %s", argv[1], strerror(errno));
@ -820,7 +827,7 @@ int cmd_grep(int argc, const char **argv, char **envp)
argc--;
continue;
}
usage(builtin_grep_usage);
die(emsg_missing_argument, arg);
}
if (!strcmp("--", arg)) {
/* later processing wants to have this at argv[1] */