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fix overslow :/no-such-string-ever-existed diagnostics 

"git cmd :/no-such-string-ever-existed" runs an extra round of get_sha1()
since 009fee4 (Detailed diagnosis when parsing an object name fails.,
2009-12-07).  Once without error diagnosis to see there is no commit with
such a string in the log message (hence "it cannot be a ref"), and after
seeing that :/no-such-string-ever-existed is not a filename (hence "it
cannot be a path, either"), another time to give "better diagnosis".

The thing is, the second time it runs, we already know that traversing the
history all the way down to the root will _not_ find any matching commit.

Rename misguided "gently" parameter, which is turned off _only_ when the
"detailed diagnosis" codepath knows that it cannot be a ref and making the
call only for the caller to die with a message.  Flip its meaning (and
adjust the callers) and call it "only_to_die", which is not a great name,
but it describes far more clearly what the codepaths that switches their
behaviour based on this variable do.

On my box, the command spends ~1.8 seconds without the patch to make the
report; with the patch it spends ~1.12 seconds.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-05-10 12:02:54 -07:00
parent 9619617d33
commit 2e83b66c32
3 changed files with 14 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
cache.h
View File

@ -785,15 +785,15 @@ struct object_context {
};
extern int get_sha1(const char *str, unsigned char *sha1);
extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
{
return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
}
extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
{
return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
}
extern int get_sha1_hex(const char *hex, unsigned char *sha1);
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */

2
setup.c
View File

@ -86,7 +86,7 @@ static void NORETURN die_verify_filename(const char *prefix, const char *arg)
unsigned char sha1[20];
unsigned mode;
/* try a detailed diagnostic ... */
get_sha1_with_mode_1(arg, sha1, &mode, 0, prefix);
get_sha1_with_mode_1(arg, sha1, &mode, 1, prefix);
/* ... or fall back the most general message. */
die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
"Use '--' to separate paths from revisions", arg);

17
sha1_name.c
View File

@ -1080,11 +1080,12 @@ static void diagnose_invalid_index_path(int stage,
}
int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode, int gently, const char *prefix)
int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode,
int only_to_die, const char *prefix)
{
struct object_context oc;
int ret;
ret = get_sha1_with_context_1(name, sha1, &oc, gently, prefix);
ret = get_sha1_with_context_1(name, sha1, &oc, only_to_die, prefix);
*mode = oc.mode;
return ret;
}
@ -1108,7 +1109,7 @@ static char *resolve_relative_path(const char *rel)
int get_sha1_with_context_1(const char *name, unsigned char *sha1,
struct object_context *oc,
int gently, const char *prefix)
int only_to_die, const char *prefix)
{
int ret, bracket_depth;
int namelen = strlen(name);
@ -1130,7 +1131,7 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
struct cache_entry *ce;
char *new_path = NULL;
int pos;
if (namelen > 2 && name[1] == '/') {
if (!only_to_die && namelen > 2 && name[1] == '/') {
struct commit_list *list = NULL;
for_each_ref(handle_one_ref, &list);
return get_sha1_oneline(name + 2, sha1, list);
@ -1173,7 +1174,7 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
}
pos++;
}
if (!gently && name[1] && name[1] != '/')
if (only_to_die && name[1] && name[1] != '/')
diagnose_invalid_index_path(stage, prefix, cp);
free(new_path);
return -1;
@ -1189,7 +1190,7 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
if (*cp == ':') {
unsigned char tree_sha1[20];
char *object_name = NULL;
if (!gently) {
if (only_to_die) {
object_name = xmalloc(cp-name+1);
strncpy(object_name, name, cp-name);
object_name[cp-name] = '\0';
@ -1202,7 +1203,7 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
if (new_filename)
filename = new_filename;
ret = get_tree_entry(tree_sha1, filename, sha1, &oc->mode);
if (!gently) {
if (only_to_die) {
diagnose_invalid_sha1_path(prefix, filename,
tree_sha1, object_name);
free(object_name);
@ -1215,7 +1216,7 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
free(new_filename);
return ret;
} else {
if (!gently)
if (only_to_die)
die("Invalid object name '%s'.", object_name);
}
}