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#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include "cache.h"
#include "commit.h"
#include <errno.h>
#include <stdio.h>
#include <curl/curl.h>
#include <curl/easy.h>
static CURL *curl;
static char *base;
static int tree = 0;
static int commits = 0;
static int all = 0;
static SHA_CTX c;
static z_stream stream;
static int local;
static int zret;
static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
void *data) {
char expn[4096];
size_t size = eltsize * nmemb;
int posn = 0;
do {
ssize_t retval = write(local, ptr + posn, size - posn);
if (retval < 0)
return posn;
posn += retval;
} while (posn < size);
stream.avail_in = size;
stream.next_in = ptr;
do {
stream.next_out = expn;
stream.avail_out = sizeof(expn);
zret = inflate(&stream, Z_SYNC_FLUSH);
SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
} while (stream.avail_in && zret == Z_OK);
return size;
}
static int fetch(unsigned char *sha1)
{
char *hex = sha1_to_hex(sha1);
char *filename = sha1_file_name(sha1);
char real_sha1[20];
char *url;
char *posn;
if (has_sha1_file(sha1)) {
return 0;
}
local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (local < 0)
return error("Couldn't open %s\n", filename);
memset(&stream, 0, sizeof(stream));
inflateInit(&stream);
SHA1_Init(&c);
curl_easy_setopt(curl, CURLOPT_FILE, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
url = malloc(strlen(base) + 50);
strcpy(url, base);
posn = url + strlen(base);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
*(posn++) = '/';
strcpy(posn, hex + 2);
curl_easy_setopt(curl, CURLOPT_URL, url);
/*printf("Getting %s\n", hex);*/
if (curl_easy_perform(curl))
return error("Couldn't get %s for %s\n", url, hex);
close(local);
inflateEnd(&stream);
SHA1_Final(real_sha1, &c);
if (zret != Z_STREAM_END) {
unlink(filename);
return error("File %s (%s) corrupt\n", hex, url);
}
if (memcmp(sha1, real_sha1, 20)) {
unlink(filename);
return error("File %s has bad hash\n", hex);
}
return 0;
}
static int process_tree(unsigned char *sha1)
{
struct tree *tree = lookup_tree(sha1);
struct tree_entry_list *entries;
if (parse_tree(tree))
return -1;
for (entries = tree->entries; entries; entries = entries->next) {
if (fetch(entries->item.tree->object.sha1))
return -1;
if (entries->directory) {
if (process_tree(entries->item.tree->object.sha1))
return -1;
}
}
return 0;
}
static int process_commit(unsigned char *sha1)
{
struct commit *obj = lookup_commit(sha1);
if (fetch(sha1))
return -1;
if (parse_commit(obj))
return -1;
if (tree) {
if (fetch(obj->tree->object.sha1))
return -1;
if (process_tree(obj->tree->object.sha1))
return -1;
if (!all)
tree = 0;
}
if (commits) {
struct commit_list *parents = obj->parents;
for (; parents; parents = parents->next) {
if (has_sha1_file(parents->item->object.sha1))
continue;
if (fetch(parents->item->object.sha1)) {
/* The server might not have it, and
* we don't mind.
*/
continue;
}
if (process_commit(parents->item->object.sha1))
return -1;
}
}
return 0;
}
int main(int argc, char **argv)
{
char *commit_id;
char *url;
int arg = 1;
unsigned char sha1[20];
while (arg < argc && argv[arg][0] == '-') {
if (argv[arg][1] == 't') {
tree = 1;
} else if (argv[arg][1] == 'c') {
commits = 1;
} else if (argv[arg][1] == 'a') {
all = 1;
tree = 1;
commits = 1;
}
arg++;
}
if (argc < arg + 2) {
usage("http-pull [-c] [-t] [-a] commit-id url");
return 1;
}
commit_id = argv[arg];
url = argv[arg + 1];
get_sha1_hex(commit_id, sha1);
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
base = url;
if (fetch(sha1))
return 1;
if (process_commit(sha1))
return 1;
curl_global_cleanup();
return 0;
}
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