Andrew's git - gitweb.git/blob

   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
  10#include "pull.h"
  11
  12#include <curl/curl.h>
  13#include <curl/easy.h>
  14
  15static CURL *curl;
  16
  17static char *base;
  18
  19static SHA_CTX c;
  20static z_stream stream;
  21
  22static int local;
  23static int zret;
  24
  25static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, 
  26                               void *data) {
  27        char expn[4096];
  28        size_t size = eltsize * nmemb;
  29        int posn = 0;
  30        do {
  31                ssize_t retval = write(local, ptr + posn, size - posn);
  32                if (retval < 0)
  33                        return posn;
  34                posn += retval;
  35        } while (posn < size);
  36
  37        stream.avail_in = size;
  38        stream.next_in = ptr;
  39        do {
  40                stream.next_out = expn;
  41                stream.avail_out = sizeof(expn);
  42                zret = inflate(&stream, Z_SYNC_FLUSH);
  43                SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
  44        } while (stream.avail_in && zret == Z_OK);
  45        return size;
  46}
  47
  48int fetch(unsigned char *sha1)
  49{
  50        char *hex = sha1_to_hex(sha1);
  51        char *filename = sha1_file_name(sha1);
  52        char real_sha1[20];
  53        char *url;
  54        char *posn;
  55
  56        local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
  57
  58        if (local < 0)
  59                return error("Couldn't open %s\n", filename);
  60
  61        memset(&stream, 0, sizeof(stream));
  62
  63        inflateInit(&stream);
  64
  65        SHA1_Init(&c);
  66
  67        curl_easy_setopt(curl, CURLOPT_FILE, NULL);
  68        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
  69
  70        url = xmalloc(strlen(base) + 50);
  71        strcpy(url, base);
  72        posn = url + strlen(base);
  73        strcpy(posn, "objects/");
  74        posn += 8;
  75        memcpy(posn, hex, 2);
  76        posn += 2;
  77        *(posn++) = '/';
  78        strcpy(posn, hex + 2);
  79
  80        curl_easy_setopt(curl, CURLOPT_URL, url);
  81
  82        /*printf("Getting %s\n", hex);*/
  83
  84        if (curl_easy_perform(curl))
  85                return error("Couldn't get %s for %s\n", url, hex);
  86
  87        close(local);
  88        inflateEnd(&stream);
  89        SHA1_Final(real_sha1, &c);
  90        if (zret != Z_STREAM_END) {
  91                unlink(filename);
  92                return error("File %s (%s) corrupt\n", hex, url);
  93        }
  94        if (memcmp(sha1, real_sha1, 20)) {
  95                unlink(filename);
  96                return error("File %s has bad hash\n", hex);
  97        }
  98        
  99        return 0;
 100}
 101
 102int main(int argc, char **argv)
 103{
 104        char *commit_id;
 105        char *url;
 106        int arg = 1;
 107
 108        while (arg < argc && argv[arg][0] == '-') {
 109                if (argv[arg][1] == 't') {
 110                        get_tree = 1;
 111                } else if (argv[arg][1] == 'c') {
 112                        get_history = 1;
 113                } else if (argv[arg][1] == 'a') {
 114                        get_all = 1;
 115                        get_tree = 1;
 116                        get_history = 1;
 117                }
 118                arg++;
 119        }
 120        if (argc < arg + 2) {
 121                usage("http-pull [-c] [-t] [-a] commit-id url");
 122                return 1;
 123        }
 124        commit_id = argv[arg];
 125        url = argv[arg + 1];
 126
 127        curl_global_init(CURL_GLOBAL_ALL);
 128
 129        curl = curl_easy_init();
 130
 131        base = url;
 132
 133        if (pull(commit_id))
 134                return 1;
 135
 136        curl_global_cleanup();
 137        return 0;
 138}