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Allow saving an object from a pipe

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In order to support getting data into git with scripts, this adds a
--stdin option to git-hash-object, which will make it read from stdin.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Daniel Barkalow 2005-12-10 17:25:24 -05:00 committed by Junio C Hamano
parent 10945e006a
commit 024510c8d9
4 changed files with 52 additions and 3 deletions
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5
Documentation/git-hash-object.txt
View File

@ -8,7 +8,7 @@ git-hash-object - Computes object ID and optionally creates a blob from a file.
SYNOPSIS
--------
'git-hash-object' [-t <type>] [-w] <file>
'git-hash-object' [-t <type>] [-w] [--stdin] [--] <file>...
DESCRIPTION
-----------
@ -29,6 +29,9 @@ OPTIONS
-w::
Actually write the object into the object database.
--stdin::
Read the object from standard input instead of from a file.
Author
------
Written by Junio C Hamano <junkio@cox.net>

1
cache.h
View File

@ -144,6 +144,7 @@ extern int ce_match_stat(struct cache_entry *ce, struct stat *st);
extern int ce_modified(struct cache_entry *ce, struct stat *st);
extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type);
extern int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object);
extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);

15
hash-object.c
View File

@ -21,8 +21,16 @@ static void hash_object(const char *path, const char *type, int write_object)
printf("%s\n", sha1_to_hex(sha1));
}
static void hash_stdin(const char *type, int write_object)
{
unsigned char sha1[20];
if (index_pipe(sha1, 0, type, write_object))
die("Unable to add stdin to database");
printf("%s\n", sha1_to_hex(sha1));
}
static const char hash_object_usage[] =
"git-hash-object [-t <type>] [-w] <file>...";
"git-hash-object [-t <type>] [-w] [--stdin] <file>...";
int main(int argc, char **argv)
{
@ -53,9 +61,12 @@ int main(int argc, char **argv)
}
else if (!strcmp(argv[i], "--help"))
usage(hash_object_usage);
else if (!strcmp(argv[i], "--stdin")) {
hash_stdin(type, write_object);
}
else
die(hash_object_usage);
}
}
else {
const char *arg = argv[i];
if (0 <= prefix_length)

34
sha1_file.c
View File

@ -1528,6 +1528,40 @@ int has_sha1_file(const unsigned char *sha1)
return find_sha1_file(sha1, &st) ? 1 : 0;
}
int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
{
unsigned long size = 4096;
char *buf = malloc(size);
int iret, ret;
unsigned long off = 0;
unsigned char hdr[50];
int hdrlen;
do {
iret = read(fd, buf + off, size - off);
if (iret > 0) {
off += iret;
if (off == size) {
size *= 2;
buf = realloc(buf, size);
}
}
} while (iret > 0);
if (iret < 0) {
free(buf);
return -1;
}
if (!type)
type = "blob";
if (write_object)
ret = write_sha1_file(buf, off, type, sha1);
else {
write_sha1_file_prepare(buf, off, type, sha1, hdr, &hdrlen);
ret = 0;
}
free(buf);
return ret;
}
int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type)
{
unsigned long size = st->st_size;