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262 lines
6.1 KiB
262 lines
6.1 KiB
/* |
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* Copyright (C) 2005 Junio C Hamano |
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*/ |
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#include "cache.h" |
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#include "commit.h" |
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#include "fetch.h" |
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static int use_link; |
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static int use_symlink; |
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static int use_filecopy = 1; |
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static int commits_on_stdin; |
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static const char *path; /* "Remote" git repository */ |
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void prefetch(unsigned char *sha1) |
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{ |
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} |
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static struct packed_git *packs; |
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static void setup_index(unsigned char *sha1) |
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{ |
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struct packed_git *new_pack; |
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char filename[PATH_MAX]; |
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strcpy(filename, path); |
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strcat(filename, "/objects/pack/pack-"); |
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strcat(filename, sha1_to_hex(sha1)); |
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strcat(filename, ".idx"); |
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new_pack = parse_pack_index_file(sha1, filename); |
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new_pack->next = packs; |
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packs = new_pack; |
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} |
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static int setup_indices(void) |
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{ |
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DIR *dir; |
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struct dirent *de; |
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char filename[PATH_MAX]; |
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unsigned char sha1[20]; |
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sprintf(filename, "%s/objects/pack/", path); |
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dir = opendir(filename); |
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if (!dir) |
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return -1; |
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while ((de = readdir(dir)) != NULL) { |
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int namelen = strlen(de->d_name); |
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if (namelen != 50 || |
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!has_extension(de->d_name, ".pack")) |
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continue; |
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get_sha1_hex(de->d_name + 5, sha1); |
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setup_index(sha1); |
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} |
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closedir(dir); |
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return 0; |
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} |
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static int copy_file(const char *source, char *dest, const char *hex, |
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int warn_if_not_exists) |
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{ |
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safe_create_leading_directories(dest); |
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if (use_link) { |
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if (!link(source, dest)) { |
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pull_say("link %s\n", hex); |
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return 0; |
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} |
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/* If we got ENOENT there is no point continuing. */ |
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if (errno == ENOENT) { |
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if (warn_if_not_exists) |
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fprintf(stderr, "does not exist %s\n", source); |
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return -1; |
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} |
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} |
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if (use_symlink) { |
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struct stat st; |
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if (stat(source, &st)) { |
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if (!warn_if_not_exists && errno == ENOENT) |
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return -1; |
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fprintf(stderr, "cannot stat %s: %s\n", source, |
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strerror(errno)); |
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return -1; |
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} |
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if (!symlink(source, dest)) { |
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pull_say("symlink %s\n", hex); |
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return 0; |
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} |
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} |
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if (use_filecopy) { |
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int ifd, ofd, status = 0; |
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ifd = open(source, O_RDONLY); |
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if (ifd < 0) { |
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if (!warn_if_not_exists && errno == ENOENT) |
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return -1; |
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fprintf(stderr, "cannot open %s\n", source); |
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return -1; |
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} |
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ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666); |
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if (ofd < 0) { |
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fprintf(stderr, "cannot open %s\n", dest); |
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close(ifd); |
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return -1; |
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} |
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status = copy_fd(ifd, ofd); |
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close(ofd); |
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if (status) |
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fprintf(stderr, "cannot write %s\n", dest); |
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else |
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pull_say("copy %s\n", hex); |
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return status; |
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} |
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fprintf(stderr, "failed to copy %s with given copy methods.\n", hex); |
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return -1; |
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} |
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static int fetch_pack(const unsigned char *sha1) |
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{ |
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struct packed_git *target; |
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char filename[PATH_MAX]; |
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if (setup_indices()) |
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return -1; |
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target = find_sha1_pack(sha1, packs); |
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if (!target) |
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return error("Couldn't find %s: not separate or in any pack", |
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sha1_to_hex(sha1)); |
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if (get_verbosely) { |
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fprintf(stderr, "Getting pack %s\n", |
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sha1_to_hex(target->sha1)); |
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fprintf(stderr, " which contains %s\n", |
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sha1_to_hex(sha1)); |
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} |
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sprintf(filename, "%s/objects/pack/pack-%s.pack", |
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path, sha1_to_hex(target->sha1)); |
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copy_file(filename, sha1_pack_name(target->sha1), |
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sha1_to_hex(target->sha1), 1); |
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sprintf(filename, "%s/objects/pack/pack-%s.idx", |
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path, sha1_to_hex(target->sha1)); |
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copy_file(filename, sha1_pack_index_name(target->sha1), |
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sha1_to_hex(target->sha1), 1); |
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install_packed_git(target); |
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return 0; |
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} |
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static int fetch_file(const unsigned char *sha1) |
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{ |
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static int object_name_start = -1; |
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static char filename[PATH_MAX]; |
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char *hex = sha1_to_hex(sha1); |
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char *dest_filename = sha1_file_name(sha1); |
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if (object_name_start < 0) { |
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strcpy(filename, path); /* e.g. git.git */ |
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strcat(filename, "/objects/"); |
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object_name_start = strlen(filename); |
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} |
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filename[object_name_start+0] = hex[0]; |
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filename[object_name_start+1] = hex[1]; |
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filename[object_name_start+2] = '/'; |
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strcpy(filename + object_name_start + 3, hex + 2); |
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return copy_file(filename, dest_filename, hex, 0); |
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} |
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int fetch(unsigned char *sha1) |
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{ |
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if (has_sha1_file(sha1)) |
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return 0; |
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else |
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return fetch_file(sha1) && fetch_pack(sha1); |
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} |
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int fetch_ref(char *ref, unsigned char *sha1) |
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{ |
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static int ref_name_start = -1; |
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static char filename[PATH_MAX]; |
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static char hex[41]; |
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int ifd; |
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if (ref_name_start < 0) { |
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sprintf(filename, "%s/refs/", path); |
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ref_name_start = strlen(filename); |
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} |
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strcpy(filename + ref_name_start, ref); |
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ifd = open(filename, O_RDONLY); |
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if (ifd < 0) { |
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close(ifd); |
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fprintf(stderr, "cannot open %s\n", filename); |
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return -1; |
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} |
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if (read(ifd, hex, 40) != 40 || get_sha1_hex(hex, sha1)) { |
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close(ifd); |
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fprintf(stderr, "cannot read from %s\n", filename); |
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return -1; |
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} |
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close(ifd); |
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pull_say("ref %s\n", sha1_to_hex(sha1)); |
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return 0; |
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} |
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static const char local_pull_usage[] = |
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"git-local-fetch [-c] [-t] [-a] [-v] [-w filename] [--recover] [-l] [-s] [-n] [--stdin] commit-id path"; |
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/* |
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* By default we only use file copy. |
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* If -l is specified, a hard link is attempted. |
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* If -s is specified, then a symlink is attempted. |
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* If -n is _not_ specified, then a regular file-to-file copy is done. |
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*/ |
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int main(int argc, const char **argv) |
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{ |
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int commits; |
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const char **write_ref = NULL; |
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char **commit_id; |
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int arg = 1; |
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setup_ident(); |
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setup_git_directory(); |
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git_config(git_default_config); |
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while (arg < argc && argv[arg][0] == '-') { |
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if (argv[arg][1] == 't') |
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get_tree = 1; |
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else if (argv[arg][1] == 'c') |
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get_history = 1; |
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else if (argv[arg][1] == 'a') { |
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get_all = 1; |
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get_tree = 1; |
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get_history = 1; |
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} |
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else if (argv[arg][1] == 'l') |
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use_link = 1; |
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else if (argv[arg][1] == 's') |
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use_symlink = 1; |
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else if (argv[arg][1] == 'n') |
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use_filecopy = 0; |
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else if (argv[arg][1] == 'v') |
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get_verbosely = 1; |
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else if (argv[arg][1] == 'w') |
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write_ref = &argv[++arg]; |
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else if (!strcmp(argv[arg], "--recover")) |
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get_recover = 1; |
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else if (!strcmp(argv[arg], "--stdin")) |
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commits_on_stdin = 1; |
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else |
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usage(local_pull_usage); |
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arg++; |
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} |
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if (argc < arg + 2 - commits_on_stdin) |
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usage(local_pull_usage); |
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if (commits_on_stdin) { |
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commits = pull_targets_stdin(&commit_id, &write_ref); |
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} else { |
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commit_id = (char **) &argv[arg++]; |
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commits = 1; |
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} |
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path = argv[arg]; |
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if (pull(commits, commit_id, write_ref, path)) |
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return 1; |
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if (commits_on_stdin) |
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pull_targets_free(commits, commit_id, write_ref); |
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return 0; |
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}
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