[PATCH] Docs for git-build-rev-cache.
[git.git] / http-pull.c
index f693aba..e70ab39 100644 (file)
@@ -1,17 +1,18 @@
-#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 "pull.h"
 
 #include <curl/curl.h>
 #include <curl/easy.h>
 
+#if LIBCURL_VERSION_NUM < 0x070704
+#define curl_global_cleanup() do { /* nothing */ } while(0)
+#endif
+#if LIBCURL_VERSION_NUM < 0x070800
+#define curl_global_init(a) do { /* nothing */ } while(0)
+#endif
+
 static CURL *curl;
 
 static char *base;
@@ -22,9 +23,30 @@ 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];
+static int curl_ssl_verify;
+
+struct buffer
+{
+        size_t posn;
+        size_t size;
+        void *buffer;
+};
+
+static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
+                            struct buffer *buffer)
+{
+        size_t size = eltsize * nmemb;
+        if (size > buffer->size - buffer->posn)
+                size = buffer->size - buffer->posn;
+        memcpy(buffer->buffer + buffer->posn, ptr, size);
+        buffer->posn += size;
+        return size;
+}
+
+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;
        do {
@@ -45,18 +67,184 @@ static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
        return size;
 }
 
+void prefetch(unsigned char *sha1)
+{
+}
+
+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);
        char *filename = sha1_file_name(sha1);
-       char real_sha1[20];
+       unsigned char real_sha1[20];
        char *url;
        char *posn;
 
        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));
 
@@ -64,6 +252,7 @@ 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);
 
@@ -79,10 +268,12 @@ int fetch(unsigned char *sha1)
 
        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);
+       if (curl_easy_perform(curl)) {
+               unlink(filename);
+               if (fetch_pack(sha1))
+                       return error("Tried %s", url);
+               return 0;
+       }
 
        close(local);
        inflateEnd(&stream);
@@ -96,9 +287,40 @@ int fetch(unsigned char *sha1)
                return error("File %s has bad hash\n", hex);
        }
        
+       pull_say("got %s\n", hex);
        return 0;
 }
 
+int fetch_ref(char *ref, unsigned char *sha1)
+{
+        char *url, *posn;
+        char hex[42];
+        struct buffer buffer;
+        buffer.size = 41;
+        buffer.posn = 0;
+        buffer.buffer = hex;
+        hex[41] = '\0';
+        
+        curl_easy_setopt(curl, CURLOPT_FILE, &buffer);
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
+
+        url = xmalloc(strlen(base) + 6 + strlen(ref));
+        strcpy(url, base);
+        posn = url + strlen(base);
+        strcpy(posn, "refs/");
+        posn += 5;
+        strcpy(posn, ref);
+
+        curl_easy_setopt(curl, CURLOPT_URL, url);
+
+        if (curl_easy_perform(curl))
+                return error("Couldn't get %s for %s\n", url, ref);
+
+        hex[40] = '\0';
+        get_sha1_hex(hex, sha1);
+        return 0;
+}
+
 int main(int argc, char **argv)
 {
        char *commit_id;
@@ -114,11 +336,16 @@ int main(int argc, char **argv)
                        get_all = 1;
                        get_tree = 1;
                        get_history = 1;
+               } else if (argv[arg][1] == 'v') {
+                       get_verbosely = 1;
+               } else if (argv[arg][1] == 'w') {
+                       write_ref = argv[arg + 1];
+                       arg++;
                }
                arg++;
        }
        if (argc < arg + 2) {
-               usage("http-pull [-c] [-t] [-a] commit-id url");
+               usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
                return 1;
        }
        commit_id = argv[arg];
@@ -128,6 +355,12 @@ int main(int argc, char **argv)
 
        curl = curl_easy_init();
 
+       curl_ssl_verify = gitenv("GIT_SSL_NO_VERIFY") ? 0 : 1;
+       curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
+#if LIBCURL_VERSION_NUM >= 0x070907
+       curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
+#endif
+
        base = url;
 
        if (pull(commit_id))