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129 lines
3.0 KiB
129 lines
3.0 KiB
/* |
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* Copyright (C) 2005 Junio C Hamano |
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*/ |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <limits.h> |
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#include "cache.h" |
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#include "commit.h" |
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#include <errno.h> |
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#include <stdio.h> |
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#include "pull.h" |
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static int use_link = 0; |
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static int use_symlink = 0; |
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static int use_filecopy = 1; |
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static char *path; |
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int fetch(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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const 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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if (use_link) { |
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if (!link(filename, dest_filename)) { |
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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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fprintf(stderr, "does not exist %s\n", filename); |
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return -1; |
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} |
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} |
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if (use_symlink && !symlink(filename, dest_filename)) { |
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pull_say("symlink %s\n", hex); |
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return 0; |
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} |
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if (use_filecopy) { |
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int ifd, ofd, status; |
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struct stat st; |
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void *map; |
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ifd = open(filename, O_RDONLY); |
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if (ifd < 0 || fstat(ifd, &st) < 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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map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0); |
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close(ifd); |
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if (-1 == (int)(long)map) { |
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fprintf(stderr, "cannot mmap %s\n", filename); |
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return -1; |
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} |
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ofd = open(dest_filename, O_WRONLY | O_CREAT | O_EXCL, 0666); |
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status = ((ofd < 0) || |
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(write(ofd, map, st.st_size) != st.st_size)); |
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munmap(map, st.st_size); |
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close(ofd); |
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if (status) |
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fprintf(stderr, "cannot write %s (%ld bytes)\n", |
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dest_filename, st.st_size); |
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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 const char *local_pull_usage = |
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"git-local-pull [-c] [-t] [-a] [-l] [-s] [-n] [-v] 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, char **argv) |
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{ |
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char *commit_id; |
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int arg = 1; |
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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 |
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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) |
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usage(local_pull_usage); |
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commit_id = argv[arg]; |
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path = argv[arg + 1]; |
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if (pull(commit_id)) |
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return 1; |
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return 0; |
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}
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