Andrew's git - gitweb.git/blob

0a9a366e0e960cb3d0d680078627dba90937ad29
   1#include <fcntl.h>
   2#include <unistd.h>
   3#include <string.h>
   4#include <stdlib.h>
   5#include "cache.h"
   6#include "commit.h"
   7#include <errno.h>
   8#include <stdio.h>
   9#include "pull.h"
  10
  11static int use_link = 0;
  12static int use_symlink = 0;
  13static int verbose = 0;
  14
  15static char *path;
  16
  17static void say(const char *fmt, const char *hex) {
  18        if (verbose)
  19                fprintf(stderr, fmt, hex);
  20}
  21
  22int fetch(unsigned char *sha1)
  23{
  24        static int object_name_start = -1;
  25        static char filename[PATH_MAX];
  26        char *hex = sha1_to_hex(sha1);
  27        const char *dest_filename = sha1_file_name(sha1);
  28        int ifd, ofd, status;
  29        struct stat st;
  30        void *map;
  31
  32        if (object_name_start < 0) {
  33                strcpy(filename, path); /* e.g. git.git */
  34                strcat(filename, "/objects/");
  35                object_name_start = strlen(filename);
  36        }
  37        filename[object_name_start+0] = hex[0];
  38        filename[object_name_start+1] = hex[1];
  39        filename[object_name_start+2] = '/';
  40        strcpy(filename + object_name_start + 3, hex + 2);
  41        if (use_link && !link(filename, dest_filename)) {
  42                say("Hardlinked %s.\n", hex);
  43                return 0;
  44        }
  45        if (use_symlink && !symlink(filename, dest_filename)) {
  46                say("Symlinked %s.\n", hex);
  47                return 0;
  48        }
  49        ifd = open(filename, O_RDONLY);
  50        if (ifd < 0 || fstat(ifd, &st) < 0) {
  51                close(ifd);
  52                fprintf(stderr, "Cannot open %s\n", filename);
  53                return -1;
  54        }
  55        map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
  56        close(ifd);
  57        if (-1 == (int)(long)map) {
  58                fprintf(stderr, "Cannot mmap %s\n", filename);
  59                return -1;
  60        }
  61        ofd = open(dest_filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
  62        status = ((ofd < 0) || (write(ofd, map, st.st_size) != st.st_size));
  63        munmap(map, st.st_size);
  64        close(ofd);
  65        if (status)
  66                fprintf(stderr, "Cannot write %s (%ld bytes)\n",
  67                        dest_filename, st.st_size);
  68        else
  69                say("Copied %s.\n", hex);
  70        return status;
  71}
  72
  73static const char *local_pull_usage = 
  74"git-local-pull [-c] [-t] [-a] [-l] [-s] [-v] commit-id path";
  75
  76int main(int argc, char **argv)
  77{
  78        char *commit_id;
  79        int arg = 1;
  80
  81        while (arg < argc && argv[arg][0] == '-') {
  82                if (argv[arg][1] == 't')
  83                        get_tree = 1;
  84                else if (argv[arg][1] == 'c')
  85                        get_history = 1;
  86                else if (argv[arg][1] == 'a') {
  87                        get_all = 1;
  88                        get_tree = 1;
  89                        get_history = 1;
  90                }
  91                else if (argv[arg][1] == 'l')
  92                        use_link = 1;
  93                else if (argv[arg][1] == 's')
  94                        use_symlink = 1;
  95                else if (argv[arg][1] == 'v')
  96                        verbose = 1;
  97                else
  98                        usage(local_pull_usage);
  99                arg++;
 100        }
 101        if (argc < arg + 2)
 102                usage(local_pull_usage);
 103        commit_id = argv[arg];
 104        path = argv[arg + 1];
 105
 106        if (pull(commit_id))
 107                return 1;
 108
 109        return 0;
 110}