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https://github.com/git/git
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ee4f439fea
Currently pull() calls fetch() without checking whether we have the wanted object but all of the existing fetch() implementations perform this check and return success themselves. This patch moves the check to the caller. I will be sending a trivial git-local-pull which depends on this in the next message. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
139 lines
2.6 KiB
C
139 lines
2.6 KiB
C
#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 "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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#include <curl/curl.h>
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#include <curl/easy.h>
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static CURL *curl;
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static char *base;
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static SHA_CTX c;
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static z_stream stream;
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static int local;
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static int zret;
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static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
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void *data) {
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char expn[4096];
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size_t size = eltsize * nmemb;
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int posn = 0;
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do {
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ssize_t retval = write(local, ptr + posn, size - posn);
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if (retval < 0)
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return posn;
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posn += retval;
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} while (posn < size);
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stream.avail_in = size;
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stream.next_in = ptr;
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do {
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stream.next_out = expn;
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stream.avail_out = sizeof(expn);
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zret = inflate(&stream, Z_SYNC_FLUSH);
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SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
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} while (stream.avail_in && zret == Z_OK);
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return size;
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}
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int fetch(unsigned char *sha1)
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{
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char *hex = sha1_to_hex(sha1);
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char *filename = sha1_file_name(sha1);
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char real_sha1[20];
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char *url;
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char *posn;
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local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
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if (local < 0)
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return error("Couldn't open %s\n", filename);
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memset(&stream, 0, sizeof(stream));
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inflateInit(&stream);
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SHA1_Init(&c);
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curl_easy_setopt(curl, CURLOPT_FILE, NULL);
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
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url = xmalloc(strlen(base) + 50);
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strcpy(url, base);
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posn = url + strlen(base);
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strcpy(posn, "objects/");
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posn += 8;
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memcpy(posn, hex, 2);
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posn += 2;
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*(posn++) = '/';
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strcpy(posn, hex + 2);
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curl_easy_setopt(curl, CURLOPT_URL, url);
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/*printf("Getting %s\n", hex);*/
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if (curl_easy_perform(curl))
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return error("Couldn't get %s for %s\n", url, hex);
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close(local);
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inflateEnd(&stream);
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SHA1_Final(real_sha1, &c);
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if (zret != Z_STREAM_END) {
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unlink(filename);
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return error("File %s (%s) corrupt\n", hex, url);
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}
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if (memcmp(sha1, real_sha1, 20)) {
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unlink(filename);
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return error("File %s has bad hash\n", hex);
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}
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return 0;
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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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char *url;
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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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arg++;
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}
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if (argc < arg + 2) {
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usage("http-pull [-c] [-t] [-a] commit-id url");
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return 1;
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}
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commit_id = argv[arg];
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url = argv[arg + 1];
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curl_global_init(CURL_GLOBAL_ALL);
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curl = curl_easy_init();
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base = url;
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if (pull(commit_id))
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return 1;
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curl_global_cleanup();
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return 0;
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}
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