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-rw-r--r--http-pull.c181
1 files changed, 175 insertions, 6 deletions
diff --git a/http-pull.c b/http-pull.c
index 38047e6..bd61955 100644
--- a/http-pull.c
+++ b/http-pull.c
@@ -33,7 +33,8 @@ struct buffer
};
static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
- struct buffer *buffer) {
+ struct buffer *buffer)
+{
size_t size = eltsize * nmemb;
if (size > buffer->size - buffer->posn)
size = buffer->size - buffer->posn;
@@ -42,8 +43,9 @@ static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
return size;
}
-static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
- void *data) {
+static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
+ void *data)
+{
unsigned char expn[4096];
size_t size = eltsize * nmemb;
int posn = 0;
@@ -65,6 +67,168 @@ static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
return size;
}
+static int got_indices = 0;
+
+static struct packed_git *packs = NULL;
+
+static int fetch_index(unsigned char *sha1)
+{
+ char *filename;
+ char *url;
+
+ FILE *indexfile;
+
+ if (has_pack_index(sha1))
+ return 0;
+
+ if (get_verbosely)
+ fprintf(stderr, "Getting index for pack %s\n",
+ sha1_to_hex(sha1));
+
+ url = xmalloc(strlen(base) + 64);
+ sprintf(url, "%s/objects/pack/pack-%s.idx",
+ base, sha1_to_hex(sha1));
+
+ filename = sha1_pack_index_name(sha1);
+ indexfile = fopen(filename, "w");
+ if (!indexfile)
+ return error("Unable to open local file %s for pack index",
+ filename);
+
+ curl_easy_setopt(curl, CURLOPT_FILE, indexfile);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
+ curl_easy_setopt(curl, CURLOPT_URL, url);
+
+ if (curl_easy_perform(curl)) {
+ fclose(indexfile);
+ return error("Unable to get pack index %s", url);
+ }
+
+ fclose(indexfile);
+ return 0;
+}
+
+static int setup_index(unsigned char *sha1)
+{
+ struct packed_git *new_pack;
+ if (has_pack_file(sha1))
+ return 0; // don't list this as something we can get
+
+ if (fetch_index(sha1))
+ return -1;
+
+ new_pack = parse_pack_index(sha1);
+ new_pack->next = packs;
+ packs = new_pack;
+ return 0;
+}
+
+static int fetch_indices(void)
+{
+ unsigned char sha1[20];
+ char *url;
+ struct buffer buffer;
+ char *data;
+ int i = 0;
+
+ if (got_indices)
+ return 0;
+
+ data = xmalloc(4096);
+ buffer.size = 4096;
+ buffer.posn = 0;
+ buffer.buffer = data;
+
+ if (get_verbosely)
+ fprintf(stderr, "Getting pack list\n");
+
+ url = xmalloc(strlen(base) + 21);
+ sprintf(url, "%s/objects/info/packs", base);
+
+ curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
+ curl_easy_setopt(curl, CURLOPT_URL, url);
+
+ if (curl_easy_perform(curl)) {
+ return error("Unable to get pack index %s", url);
+ }
+
+ do {
+ switch (data[i]) {
+ case 'P':
+ i++;
+ if (i + 52 < buffer.posn &&
+ !strncmp(data + i, " pack-", 6) &&
+ !strncmp(data + i + 46, ".pack\n", 6)) {
+ get_sha1_hex(data + i + 6, sha1);
+ setup_index(sha1);
+ i += 51;
+ break;
+ }
+ default:
+ while (data[i] != '\n')
+ i++;
+ }
+ i++;
+ } while (i < buffer.posn);
+
+ got_indices = 1;
+ return 0;
+}
+
+static int fetch_pack(unsigned char *sha1)
+{
+ char *url;
+ struct packed_git *target;
+ struct packed_git **lst;
+ FILE *packfile;
+ char *filename;
+
+ if (fetch_indices())
+ return -1;
+ target = find_sha1_pack(sha1, packs);
+ if (!target)
+ return error("Couldn't get %s: not separate or in any pack",
+ sha1_to_hex(sha1));
+
+ if (get_verbosely) {
+ fprintf(stderr, "Getting pack %s\n",
+ sha1_to_hex(target->sha1));
+ fprintf(stderr, " which contains %s\n",
+ sha1_to_hex(sha1));
+ }
+
+ url = xmalloc(strlen(base) + 65);
+ sprintf(url, "%s/objects/pack/pack-%s.pack",
+ base, sha1_to_hex(target->sha1));
+
+ filename = sha1_pack_name(target->sha1);
+ packfile = fopen(filename, "w");
+ if (!packfile)
+ return error("Unable to open local file %s for pack",
+ filename);
+
+ curl_easy_setopt(curl, CURLOPT_FILE, packfile);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
+ curl_easy_setopt(curl, CURLOPT_URL, url);
+
+ if (curl_easy_perform(curl)) {
+ fclose(packfile);
+ return error("Unable to get pack file %s", url);
+ }
+
+ fclose(packfile);
+
+ lst = &packs;
+ while (*lst != target)
+ lst = &((*lst)->next);
+ *lst = (*lst)->next;
+
+ install_packed_git(target);
+
+ return 0;
+}
+
int fetch(unsigned char *sha1)
{
char *hex = sha1_to_hex(sha1);
@@ -76,7 +240,7 @@ int fetch(unsigned char *sha1)
local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (local < 0)
- return error("Couldn't open %s\n", filename);
+ return error("Couldn't open local object %s\n", filename);
memset(&stream, 0, sizeof(stream));
@@ -84,6 +248,7 @@ int fetch(unsigned char *sha1)
SHA1_Init(&c);
+ curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
curl_easy_setopt(curl, CURLOPT_FILE, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
@@ -99,8 +264,12 @@ int fetch(unsigned char *sha1)
curl_easy_setopt(curl, CURLOPT_URL, url);
- if (curl_easy_perform(curl))
- return error("Couldn't get %s for %s\n", url, hex);
+ if (curl_easy_perform(curl)) {
+ unlink(filename);
+ if (fetch_pack(sha1))
+ return error("Tried %s", url);
+ return 0;
+ }
close(local);
inflateEnd(&stream);