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Add "unpack-file" helper that unpacks a sha1 blob into a tmpfile.

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This commit is contained in:
Linus Torvalds 2005-04-18 14:11:01 -07:00
parent e590d694ea
commit 3407bb4940
2 changed files with 39 additions and 1 deletions
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6
Makefile
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@ -15,7 +15,7 @@ AR=ar
PROG= update-cache show-diff init-db write-tree read-tree commit-tree \
cat-file fsck-cache checkout-cache diff-tree rev-tree show-files \
check-files ls-tree merge-base merge-cache
check-files ls-tree merge-base merge-cache unpack-file
all: $(PROG)
@ -78,6 +78,9 @@ merge-base: merge-base.o $(LIB_FILE) object.o commit.o tree.o blob.o
merge-cache: merge-cache.o $(LIB_FILE)
$(CC) $(CFLAGS) -o merge-cache merge-cache.o $(LIBS)
unpack-file: unpack-file.o $(LIB_FILE)
$(CC) $(CFLAGS) -o unpack-file unpack-file.o $(LIBS)
blob.o: $(LIB_H)
cat-file.o: $(LIB_H)
check-files.o: $(LIB_H)
@ -100,6 +103,7 @@ show-files.o: $(LIB_H)
tree.o: $(LIB_H)
update-cache.o: $(LIB_H)
usage.o: $(LIB_H)
unpack-file.o: $(LIB_H)
write-tree.o: $(LIB_H)
clean:

34
unpack-file.c Normal file
View File

@ -0,0 +1,34 @@
#include "cache.h"
static char *create_temp_file(unsigned char *sha1)
{
static char path[50];
void *buf;
char type[100];
unsigned long size;
int fd;
buf = read_sha1_file(sha1, type, &size);
if (!buf || strcmp(type, "blob"))
die("unable to read blob object %s", sha1_to_hex(sha1));
strcpy(path, ".merge_file_XXXXXX");
fd = mkstemp(path);
if (fd < 0)
die("unable to create temp-file");
if (write(fd, buf, size) != size)
die("unable to write temp-file");
close(fd);
return path;
}
int main(int argc, char **argv)
{
unsigned char sha1[20];
if (argc != 2 || get_sha1_hex(argv[1], sha1))
usage("unpack-file.c <sha1>");
puts(create_temp_file(sha1));
return 0;
}