Support for downloading the pack file
"e3117bbaf6a59cb53c3f6f0d9b17b9433f0e4135" when appropriate. (Will
support other pack files when the repository has a list of them.)

Signed-off-by: Daniel Barkalow <[EMAIL PROTECTED]>

---
commit 74132562a2f6cfce9690a5091de7e85bd51d88af
tree c0ae9cb936abac4412aa4a89928f4609d111fd2c
parent b686d7a0377c24e05dbed0dafe909dda6c3dfb48
author Daniel Barkalow <[EMAIL PROTECTED]> 1121024943 -0400
committer Daniel Barkalow <[EMAIL PROTECTED](none)> 1121024943 -0400

Index: http-pull.c
===================================================================
--- ce285b1a0adb4f8d415f72668a77bc1f1f92e1e1/http-pull.c  (mode:100644 
sha1:1f9d60b9b1d5eed85b24d96c240666bbfc5a22ed)
+++ c0ae9cb936abac4412aa4a89928f4609d111fd2c/http-pull.c  (mode:100644 
sha1:2a8d7e71d9447483668cb4a1eb01a096e736f8e3)
@@ -56,6 +56,126 @@
        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];
+       if (got_indices)
+               return 0;
+       get_sha1_hex("e3117bbaf6a59cb53c3f6f0d9b17b9433f0e4135", sha1);
+       setup_index(sha1);
+       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);
+
+       install_packed_git(target);
+
+       lst = &packs;
+       while (*lst != target)
+               lst = &((*lst)->next);
+       *lst = (*lst)->next;
+
+       return 0;
+}
+
 int fetch(unsigned char *sha1)
 {
        char *hex = sha1_to_hex(sha1);
@@ -67,7 +187,7 @@
        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));
 
@@ -75,6 +195,7 @@
 
        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);
 
@@ -90,8 +211,12 @@
 
        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);

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