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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-01 16:36:56 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-01 16:36:56 -0700
commit3c249c950649a37f2871a8b193f01a0640a20aef (patch)
tree8ce5c715973ddb7ed553be593c090de979c4a5ce
parent68849b544258cafdf42f3ebe9772ee7a346f7147 (diff)
downloadgit-3c249c950649a37f2871a8b193f01a0640a20aef.tar.gz
Add "get_sha1()" helper function.
This allows the programs to use various simplified versions of the SHA1 names, eg just say "HEAD" for the SHA1 pointed to by the .git/HEAD file etc. For example, this commit has been done with git-commit-tree $(git-write-tree) -p HEAD instead of the traditional "$(cat .git/HEAD)" syntax.
-rw-r--r--cache.h1
-rw-r--r--cat-file.c2
-rw-r--r--commit-tree.c2
-rw-r--r--convert-cache.c2
-rw-r--r--diff-cache.c2
-rw-r--r--diff-tree.c2
-rw-r--r--export.c4
-rw-r--r--fsck-cache.c2
-rw-r--r--ls-tree.c2
-rw-r--r--merge-base.c4
-rw-r--r--read-tree.c2
-rw-r--r--rev-list.c2
-rw-r--r--rev-tree.c2
-rw-r--r--sha1_file.c29
-rw-r--r--tar-tree.c2
-rw-r--r--unpack-file.c2
16 files changed, 46 insertions, 16 deletions
diff --git a/cache.h b/cache.h
index af6345820f..940ced0314 100644
--- a/cache.h
+++ b/cache.h
@@ -146,6 +146,7 @@ extern int write_sha1_from_fd(const unsigned char *sha1, int fd);
extern int has_sha1_file(const unsigned char *sha1);
/* Convert to/from hex/sha1 representation */
+extern int get_sha1(const char *str, unsigned char *sha1);
extern int get_sha1_hex(const char *hex, unsigned char *sha1);
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
diff --git a/cat-file.c b/cat-file.c
index 3c47d79a16..d253ff9380 100644
--- a/cat-file.c
+++ b/cat-file.c
@@ -12,7 +12,7 @@ int main(int argc, char **argv)
void *buf;
unsigned long size;
- if (argc != 3 || get_sha1_hex(argv[2], sha1))
+ if (argc != 3 || get_sha1(argv[2], sha1))
usage("cat-file [-t | tagname] <sha1>");
buf = read_sha1_file(sha1, type, &size);
if (!buf)
diff --git a/commit-tree.c b/commit-tree.c
index 0c568d0179..cfd6730fe8 100644
--- a/commit-tree.c
+++ b/commit-tree.c
@@ -123,7 +123,7 @@ int main(int argc, char **argv)
for (i = 2; i < argc; i += 2) {
char *a, *b;
a = argv[i]; b = argv[i+1];
- if (!b || strcmp(a, "-p") || get_sha1_hex(b, parent_sha1[parents]))
+ if (!b || strcmp(a, "-p") || get_sha1(b, parent_sha1[parents]))
usage(commit_tree_usage);
check_valid(parent_sha1[parents], "commit");
parents++;
diff --git a/convert-cache.c b/convert-cache.c
index 631d1aa910..4d34d2d57e 100644
--- a/convert-cache.c
+++ b/convert-cache.c
@@ -303,7 +303,7 @@ int main(int argc, char **argv)
unsigned char sha1[20];
struct entry *entry;
- if (argc != 2 || get_sha1_hex(argv[1], sha1))
+ if (argc != 2 || get_sha1(argv[1], sha1))
usage("convert-cache <sha1>");
entry = convert_entry(sha1);
diff --git a/diff-cache.c b/diff-cache.c
index 899e37361e..03dd69df3e 100644
--- a/diff-cache.c
+++ b/diff-cache.c
@@ -175,7 +175,7 @@ int main(int argc, char **argv)
usage(diff_cache_usage);
}
- if (argc != 2 || get_sha1_hex(argv[1], tree_sha1))
+ if (argc != 2 || get_sha1(argv[1], tree_sha1))
usage(diff_cache_usage);
mark_merge_entries();
diff --git a/diff-tree.c b/diff-tree.c
index e7a5b7cc76..1186c5ce6d 100644
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -279,7 +279,7 @@ int main(int argc, char **argv)
usage(diff_tree_usage);
}
- if (argc < 3 || get_sha1_hex(argv[1], old) || get_sha1_hex(argv[2], new))
+ if (argc < 3 || get_sha1(argv[1], old) || get_sha1(argv[2], new))
usage(diff_tree_usage);
if (argc > 3) {
diff --git a/export.c b/export.c
index 885f4e88fc..78bfe9f222 100644
--- a/export.c
+++ b/export.c
@@ -73,8 +73,8 @@ int main(int argc, char **argv)
unsigned char top_sha1[20];
if (argc < 2 || argc > 4 ||
- get_sha1_hex(argv[1], top_sha1) ||
- (argc == 3 && get_sha1_hex(argv[2], base_sha1)))
+ get_sha1(argv[1], top_sha1) ||
+ (argc == 3 && get_sha1(argv[2], base_sha1)))
usage("git-export top [base]");
export(get_commit(top_sha1), argc==3 ? get_commit(base_sha1) : NULL);
return 0;
diff --git a/fsck-cache.c b/fsck-cache.c
index d8d2e594fc..fbcd2b64f4 100644
--- a/fsck-cache.c
+++ b/fsck-cache.c
@@ -178,7 +178,7 @@ int main(int argc, char **argv)
if (*arg == '-')
continue;
- if (!get_sha1_hex(arg, head_sha1)) {
+ if (!get_sha1(arg, head_sha1)) {
struct commit *commit = lookup_commit(head_sha1);
struct object *obj;
diff --git a/ls-tree.c b/ls-tree.c
index d2ab02e348..339ac36a4c 100644
--- a/ls-tree.c
+++ b/ls-tree.c
@@ -102,7 +102,7 @@ int main(int argc, char **argv)
if (argc != 2)
usage(ls_tree_usage);
- if (get_sha1_hex(argv[1], sha1) < 0)
+ if (get_sha1(argv[1], sha1) < 0)
usage(ls_tree_usage);
sha1_file_directory = getenv(DB_ENVIRONMENT);
if (!sha1_file_directory)
diff --git a/merge-base.c b/merge-base.c
index 2c40881302..2ea44970d2 100644
--- a/merge-base.c
+++ b/merge-base.c
@@ -58,8 +58,8 @@ int main(int argc, char **argv)
unsigned char rev1key[20], rev2key[20];
if (argc != 3 ||
- get_sha1_hex(argv[1], rev1key) ||
- get_sha1_hex(argv[2], rev2key)) {
+ get_sha1(argv[1], rev1key) ||
+ get_sha1(argv[2], rev2key)) {
usage("merge-base <commit-id> <commit-id>");
}
rev1 = lookup_commit(rev1key);
diff --git a/read-tree.c b/read-tree.c
index 604884a983..f8dc509a1f 100644
--- a/read-tree.c
+++ b/read-tree.c
@@ -191,7 +191,7 @@ int main(int argc, char **argv)
merge = 1;
continue;
}
- if (get_sha1_hex(arg, sha1) < 0)
+ if (get_sha1(arg, sha1) < 0)
usage(read_tree_usage);
if (stage > 3)
usage(read_tree_usage);
diff --git a/rev-list.c b/rev-list.c
index 77bfc29db1..42fd154fc1 100644
--- a/rev-list.c
+++ b/rev-list.c
@@ -7,7 +7,7 @@ int main(int argc, char **argv)
struct commit_list *list = NULL;
struct commit *commit;
- if (argc != 2 || get_sha1_hex(argv[1], sha1))
+ if (argc != 2 || get_sha1(argv[1], sha1))
usage("rev-list <commit-id>");
commit = lookup_commit(sha1);
diff --git a/rev-tree.c b/rev-tree.c
index 95ec274fc7..bfc8b12579 100644
--- a/rev-tree.c
+++ b/rev-tree.c
@@ -97,7 +97,7 @@ int main(int argc, char **argv)
arg++;
basemask |= 1<<nr;
}
- if (nr >= MAX_COMMITS || get_sha1_hex(arg, sha1[nr]))
+ if (nr >= MAX_COMMITS || get_sha1(arg, sha1[nr]))
usage("rev-tree [--edges] [--cache <cache-file>] <commit-id> [<commit-id>]");
process_commit(sha1[nr]);
nr++;
diff --git a/sha1_file.c b/sha1_file.c
index 29f48d56b1..d91e072f3e 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -45,6 +45,35 @@ int get_sha1_hex(const char *hex, unsigned char *sha1)
return 0;
}
+int get_sha1_file(const char *path, unsigned char *result)
+{
+ char buffer[60];
+ int fd = open(path, O_RDONLY);
+ int len;
+
+ if (fd < 0)
+ return -1;
+ len = read(fd, buffer, sizeof(buffer));
+ close(fd);
+ if (len < 40)
+ return -1;
+ return get_sha1_hex(buffer, result);
+}
+
+int get_sha1(const char *str, unsigned char *sha1)
+{
+ static char pathname[PATH_MAX];
+
+ if (!get_sha1_hex(str, sha1))
+ return 0;
+ if (!get_sha1_file(str, sha1))
+ return 0;
+ snprintf(pathname, sizeof(pathname), ".git/%s", str);
+ if (!get_sha1_file(pathname, sha1))
+ return 0;
+ return -1;
+}
+
char * sha1_to_hex(const unsigned char *sha1)
{
static char buffer[50];
diff --git a/tar-tree.c b/tar-tree.c
index ea7ea91add..2c64f690e5 100644
--- a/tar-tree.c
+++ b/tar-tree.c
@@ -338,7 +338,7 @@ int main(int argc, char **argv)
basedir = argv[2];
/* FALLTHROUGH */
case 2:
- if (get_sha1_hex(argv[1], sha1) < 0)
+ if (get_sha1(argv[1], sha1) < 0)
usage(tar_tree_usage);
break;
default:
diff --git a/unpack-file.c b/unpack-file.c
index 6ff3d51c18..b7988c5575 100644
--- a/unpack-file.c
+++ b/unpack-file.c
@@ -26,7 +26,7 @@ int main(int argc, char **argv)
{
unsigned char sha1[20];
- if (argc != 2 || get_sha1_hex(argv[1], sha1))
+ if (argc != 2 || get_sha1(argv[1], sha1))
usage("unpack-file.c <sha1>");
puts(create_temp_file(sha1));