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authorJunio C Hamano <junkio@cox.net>2005-09-08 00:26:23 (GMT)
committerJunio C Hamano <junkio@cox.net>2005-09-08 00:45:20 (GMT)
commit215a7ad1ef790467a4cd3f0dcffbd6e5f04c38f7 (patch)
tree6bc7aa4f652d0ef49108d9e30a7ea7fbf8e44639 /local-fetch.c
parent99977bd5fdeabbd0608a70e9411c243007ec4ea2 (diff)
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Big tool rename.
As promised, this is the "big tool rename" patch. The primary differences since 0.99.6 are: (1) git-*-script are no more. The commands installed do not have any such suffix so users do not have to remember if something is implemented as a shell script or not. (2) Many command names with 'cache' in them are renamed with 'index' if that is what they mean. There are backward compatibility symblic links so that you and Porcelains can keep using the old names, but the backward compatibility support is expected to be removed in the near future. Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'local-fetch.c')
-rw-r--r--local-fetch.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/local-fetch.c b/local-fetch.c
new file mode 100644
index 0000000..8176532
--- /dev/null
+++ b/local-fetch.c
@@ -0,0 +1,227 @@
+/*
+ * Copyright (C) 2005 Junio C Hamano
+ */
+#include "cache.h"
+#include "commit.h"
+#include "fetch.h"
+
+static int use_link = 0;
+static int use_symlink = 0;
+static int use_filecopy = 1;
+
+static char *path; /* "Remote" git repository */
+
+void prefetch(unsigned char *sha1)
+{
+}
+
+static struct packed_git *packs = NULL;
+
+static void setup_index(unsigned char *sha1)
+{
+ struct packed_git *new_pack;
+ char filename[PATH_MAX];
+ strcpy(filename, path);
+ strcat(filename, "/objects/pack/pack-");
+ strcat(filename, sha1_to_hex(sha1));
+ strcat(filename, ".idx");
+ new_pack = parse_pack_index_file(sha1, filename);
+ new_pack->next = packs;
+ packs = new_pack;
+}
+
+static int setup_indices(void)
+{
+ DIR *dir;
+ struct dirent *de;
+ char filename[PATH_MAX];
+ unsigned char sha1[20];
+ sprintf(filename, "%s/objects/pack/", path);
+ dir = opendir(filename);
+ while ((de = readdir(dir)) != NULL) {
+ int namelen = strlen(de->d_name);
+ if (namelen != 50 ||
+ strcmp(de->d_name + namelen - 5, ".pack"))
+ continue;
+ get_sha1_hex(de->d_name + 5, sha1);
+ setup_index(sha1);
+ }
+ return 0;
+}
+
+static int copy_file(const char *source, const char *dest, const char *hex)
+{
+ if (use_link) {
+ if (!link(source, dest)) {
+ pull_say("link %s\n", hex);
+ return 0;
+ }
+ /* If we got ENOENT there is no point continuing. */
+ if (errno == ENOENT) {
+ fprintf(stderr, "does not exist %s\n", source);
+ return -1;
+ }
+ }
+ if (use_symlink && !symlink(source, dest)) {
+ pull_say("symlink %s\n", hex);
+ return 0;
+ }
+ if (use_filecopy) {
+ int ifd, ofd, status;
+ struct stat st;
+ void *map;
+ ifd = open(source, O_RDONLY);
+ if (ifd < 0 || fstat(ifd, &st) < 0) {
+ close(ifd);
+ fprintf(stderr, "cannot open %s\n", source);
+ return -1;
+ }
+ map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
+ close(ifd);
+ if (map == MAP_FAILED) {
+ fprintf(stderr, "cannot mmap %s\n", source);
+ return -1;
+ }
+ ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
+ status = ((ofd < 0) ||
+ (write(ofd, map, st.st_size) != st.st_size));
+ munmap(map, st.st_size);
+ close(ofd);
+ if (status)
+ fprintf(stderr, "cannot write %s\n", dest);
+ else
+ pull_say("copy %s\n", hex);
+ return status;
+ }
+ fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
+ return -1;
+}
+
+static int fetch_pack(const unsigned char *sha1)
+{
+ struct packed_git *target;
+ char filename[PATH_MAX];
+ if (setup_indices())
+ return -1;
+ target = find_sha1_pack(sha1, packs);
+ if (!target)
+ return error("Couldn't find %s: not separate or in any pack",
+ sha1_to_hex(sha1));
+ if (get_verbosely) {
+ fprintf(stderr, "Getting pack %s\n",
+ sha1_to_hex(target->sha1));
+ fprintf(stderr, " which contains %s\n",
+ sha1_to_hex(sha1));
+ }
+ sprintf(filename, "%s/objects/pack/pack-%s.pack",
+ path, sha1_to_hex(target->sha1));
+ copy_file(filename, sha1_pack_name(target->sha1),
+ sha1_to_hex(target->sha1));
+ sprintf(filename, "%s/objects/pack/pack-%s.idx",
+ path, sha1_to_hex(target->sha1));
+ copy_file(filename, sha1_pack_index_name(target->sha1),
+ sha1_to_hex(target->sha1));
+ install_packed_git(target);
+ return 0;
+}
+
+static int fetch_file(const unsigned char *sha1)
+{
+ static int object_name_start = -1;
+ static char filename[PATH_MAX];
+ char *hex = sha1_to_hex(sha1);
+ const char *dest_filename = sha1_file_name(sha1);
+
+ if (object_name_start < 0) {
+ strcpy(filename, path); /* e.g. git.git */
+ strcat(filename, "/objects/");
+ object_name_start = strlen(filename);
+ }
+ filename[object_name_start+0] = hex[0];
+ filename[object_name_start+1] = hex[1];
+ filename[object_name_start+2] = '/';
+ strcpy(filename + object_name_start + 3, hex + 2);
+ return copy_file(filename, dest_filename, hex);
+}
+
+int fetch(unsigned char *sha1)
+{
+ return fetch_file(sha1) && fetch_pack(sha1);
+}
+
+int fetch_ref(char *ref, unsigned char *sha1)
+{
+ static int ref_name_start = -1;
+ static char filename[PATH_MAX];
+ static char hex[41];
+ int ifd;
+
+ if (ref_name_start < 0) {
+ sprintf(filename, "%s/refs/", path);
+ ref_name_start = strlen(filename);
+ }
+ strcpy(filename + ref_name_start, ref);
+ ifd = open(filename, O_RDONLY);
+ if (ifd < 0) {
+ close(ifd);
+ fprintf(stderr, "cannot open %s\n", filename);
+ return -1;
+ }
+ if (read(ifd, hex, 40) != 40 || get_sha1_hex(hex, sha1)) {
+ close(ifd);
+ fprintf(stderr, "cannot read from %s\n", filename);
+ return -1;
+ }
+ close(ifd);
+ pull_say("ref %s\n", sha1_to_hex(sha1));
+ return 0;
+}
+
+static const char local_pull_usage[] =
+"git-local-fetch [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [-l] [-s] [-n] commit-id path";
+
+/*
+ * By default we only use file copy.
+ * If -l is specified, a hard link is attempted.
+ * If -s is specified, then a symlink is attempted.
+ * If -n is _not_ specified, then a regular file-to-file copy is done.
+ */
+int main(int argc, char **argv)
+{
+ char *commit_id;
+ int arg = 1;
+
+ while (arg < argc && argv[arg][0] == '-') {
+ if (argv[arg][1] == 't')
+ get_tree = 1;
+ else if (argv[arg][1] == 'c')
+ get_history = 1;
+ else if (argv[arg][1] == 'a') {
+ get_all = 1;
+ get_tree = 1;
+ get_history = 1;
+ }
+ else if (argv[arg][1] == 'l')
+ use_link = 1;
+ else if (argv[arg][1] == 's')
+ use_symlink = 1;
+ else if (argv[arg][1] == 'n')
+ use_filecopy = 0;
+ else if (argv[arg][1] == 'v')
+ get_verbosely = 1;
+ else if (argv[arg][1] == 'w')
+ write_ref = argv[++arg];
+ else
+ usage(local_pull_usage);
+ arg++;
+ }
+ if (argc < arg + 2)
+ usage(local_pull_usage);
+ commit_id = argv[arg];
+ path = argv[arg + 1];
+
+ if (pull(commit_id))
+ return 1;
+
+ return 0;
+}