Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "commit.h"
   3
   4#include "pull.h"
   5
   6#include <curl/curl.h>
   7#include <curl/easy.h>
   8
   9static CURL *curl;
  10
  11static char *base;
  12
  13static SHA_CTX c;
  14static z_stream stream;
  15
  16static int local;
  17static int zret;
  18
  19static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, 
  20                               void *data) {
  21        unsigned char expn[4096];
  22        size_t size = eltsize * nmemb;
  23        int posn = 0;
  24        do {
  25                ssize_t retval = write(local, ptr + posn, size - posn);
  26                if (retval < 0)
  27                        return posn;
  28                posn += retval;
  29        } while (posn < size);
  30
  31        stream.avail_in = size;
  32        stream.next_in = ptr;
  33        do {
  34                stream.next_out = expn;
  35                stream.avail_out = sizeof(expn);
  36                zret = inflate(&stream, Z_SYNC_FLUSH);
  37                SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
  38        } while (stream.avail_in && zret == Z_OK);
  39        return size;
  40}
  41
  42int fetch(unsigned char *sha1)
  43{
  44        char *hex = sha1_to_hex(sha1);
  45        char *filename = sha1_file_name(sha1);
  46        unsigned char real_sha1[20];
  47        char *url;
  48        char *posn;
  49
  50        local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
  51
  52        if (local < 0)
  53                return error("Couldn't open %s\n", filename);
  54
  55        memset(&stream, 0, sizeof(stream));
  56
  57        inflateInit(&stream);
  58
  59        SHA1_Init(&c);
  60
  61        curl_easy_setopt(curl, CURLOPT_FILE, NULL);
  62        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
  63
  64        url = xmalloc(strlen(base) + 50);
  65        strcpy(url, base);
  66        posn = url + strlen(base);
  67        strcpy(posn, "objects/");
  68        posn += 8;
  69        memcpy(posn, hex, 2);
  70        posn += 2;
  71        *(posn++) = '/';
  72        strcpy(posn, hex + 2);
  73
  74        curl_easy_setopt(curl, CURLOPT_URL, url);
  75
  76        if (curl_easy_perform(curl))
  77                return error("Couldn't get %s for %s\n", url, hex);
  78
  79        close(local);
  80        inflateEnd(&stream);
  81        SHA1_Final(real_sha1, &c);
  82        if (zret != Z_STREAM_END) {
  83                unlink(filename);
  84                return error("File %s (%s) corrupt\n", hex, url);
  85        }
  86        if (memcmp(sha1, real_sha1, 20)) {
  87                unlink(filename);
  88                return error("File %s has bad hash\n", hex);
  89        }
  90        
  91        pull_say("got %s\n", hex);
  92        return 0;
  93}
  94
  95int main(int argc, char **argv)
  96{
  97        char *commit_id;
  98        char *url;
  99        int arg = 1;
 100
 101        while (arg < argc && argv[arg][0] == '-') {
 102                if (argv[arg][1] == 't') {
 103                        get_tree = 1;
 104                } else if (argv[arg][1] == 'c') {
 105                        get_history = 1;
 106                } else if (argv[arg][1] == 'a') {
 107                        get_all = 1;
 108                        get_tree = 1;
 109                        get_history = 1;
 110                } else if (argv[arg][1] == 'v') {
 111                        get_verbosely = 1;
 112                }
 113                arg++;
 114        }
 115        if (argc < arg + 2) {
 116                usage("git-http-pull [-c] [-t] [-a] [-v] commit-id url");
 117                return 1;
 118        }
 119        commit_id = argv[arg];
 120        url = argv[arg + 1];
 121
 122        curl_global_init(CURL_GLOBAL_ALL);
 123
 124        curl = curl_easy_init();
 125
 126        base = url;
 127
 128        if (pull(commit_id))
 129                return 1;
 130
 131        curl_global_cleanup();
 132        return 0;
 133}