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add a force_object_loose() function

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This is meant to force the creation of a loose object even if it
already exists packed.  Needed for the next commit.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nicolas Pitre 2008-05-14 01:32:48 -04:00 committed by Junio C Hamano
parent 9e7d501990
commit bbac73117e
2 changed files with 48 additions and 13 deletions
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1
cache.h
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@ -506,6 +506,7 @@ extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type,
extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
extern int force_object_loose(const unsigned char *sha1, time_t mtime);
extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);

60
sha1_file.c
View File

@ -2102,26 +2102,16 @@ int hash_sha1_file(const void *buf, unsigned long len, const char *type,
return 0;
}
int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *returnsha1)
static int write_loose_object(const unsigned char *sha1, char *hdr, int hdrlen,
void *buf, unsigned long len, time_t mtime)
{
int size, ret;
int fd, size, ret;
unsigned char *compressed;
z_stream stream;
unsigned char sha1[20];
char *filename;
static char tmpfile[PATH_MAX];
char hdr[32];
int fd, hdrlen;
/* Normally if we have it in the pack then we do not bother writing
* it out into .git/objects/??/?{38} file.
*/
write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
filename = sha1_file_name(sha1);
if (returnsha1)
hashcpy(returnsha1, sha1);
if (has_sha1_file(sha1))
return 0;
fd = open(filename, O_RDONLY);
if (fd >= 0) {
/*
@ -2182,9 +2172,53 @@ int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned cha
die("unable to write sha1 file");
free(compressed);
if (mtime) {
struct utimbuf utb;
utb.actime = mtime;
utb.modtime = mtime;
if (utime(tmpfile, &utb) < 0)
warning("failed utime() on %s: %s",
tmpfile, strerror(errno));
}
return move_temp_to_file(tmpfile, filename);
}
int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *returnsha1)
{
unsigned char sha1[20];
char hdr[32];
int hdrlen;
/* Normally if we have it in the pack then we do not bother writing
* it out into .git/objects/??/?{38} file.
*/
write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
if (returnsha1)
hashcpy(returnsha1, sha1);
if (has_sha1_file(sha1))
return 0;
return write_loose_object(sha1, hdr, hdrlen, buf, len, 0);
}
int force_object_loose(const unsigned char *sha1, time_t mtime)
{
struct stat st;
void *buf;
unsigned long len;
enum object_type type;
char hdr[32];
int hdrlen;
if (find_sha1_file(sha1, &st))
return 0;
buf = read_packed_sha1(sha1, &type, &len);
if (!buf)
return error("cannot read sha1_file for %s", sha1_to_hex(sha1));
hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
return write_loose_object(sha1, hdr, hdrlen, buf, len, mtime);
}
/*
* We need to unpack and recompress the object for writing
* it out to a different file.