examples: port 'fetch' to the new API

examples/network/fetch.c

@@ -4,94 +4,45 @@
 #include <stdlib.h>
 #include <string.h>
 
-static int rename_packfile(char *packname, git_indexer *idx)
-{
-  char path[GIT_PATH_MAX], oid[GIT_OID_HEXSZ + 1], *slash;
-  int ret;
-
-  strcpy(path, packname);
-  slash = strrchr(path, '/');
-
-  if (!slash)
-	  return GIT_EINVALIDARGS;
-
-  memset(oid, 0x0, sizeof(oid));
-  // The name of the packfile is given by it's hash which you can get
-  // with git_indexer_hash after the index has been written out to
-  // disk. Rename the packfile to its "real" name in the same
-  // directory as it was originally (libgit2 stores it in the folder
-  // where the packs go, so a rename in place is the right thing to do here
-  git_oid_fmt(oid, git_indexer_hash(idx));
-  ret = sprintf(slash + 1, "pack-%s.pack", oid);
-  if(ret < 0)
-	  return GIT_EOSERR;
-
-  printf("Renaming pack to %s\n", path);
-  return rename(packname, path);
-}
-
 int fetch(git_repository *repo, int argc, char **argv)
 {
   git_remote *remote = NULL;
-  git_indexer *idx = NULL;
+  git_off_t bytes = 0;
   git_indexer_stats stats;
-  int error;
   char *packname = NULL;
 
   // Get the remote and connect to it
   printf("Fetching %s\n", argv[1]);
-  error = git_remote_new(&remote, repo, argv[1], NULL);
+  if (git_remote_load(&remote, repo, argv[1]) == GIT_ENOTFOUND) {
-  if (error < GIT_SUCCESS)
+	  if (git_remote_new(&remote, repo, argv[1], NULL) < 0)
-    return error;
+		  return -1;
-
-  error = git_remote_connect(remote, GIT_DIR_FETCH);
-  if (error < GIT_SUCCESS)
-    return error;
-
-  // Download the packfile from the server. As we don't know its hash
-  // yet, it will get a temporary filename
-  error = git_remote_download(&packname, remote);
-  if (error < GIT_SUCCESS)
-    return error;
-
-  // No error and a NULL packname means no packfile was needed
-  if (packname != NULL) {
-	  printf("The packname is %s\n", packname);
-
-	  // Create a new instance indexer
-	  error = git_indexer_new(&idx, packname);
-	  if (error < GIT_SUCCESS)
-		  return error;
-
-	  // This should be run in paralel, but it'd be too complicated for the example
-	  error = git_indexer_run(idx, &stats);
-	  if (error < GIT_SUCCESS)
-		  return error;
-
-	  printf("Received %d objects\n", stats.total);
-
-	  // Write the index file. The index will be stored with the
-	  // correct filename
-	  error = git_indexer_write(idx);
-	  if (error < GIT_SUCCESS)
-		  return error;
-
-	  error = rename_packfile(packname, idx);
-	  if (error < GIT_SUCCESS)
-		  return error;
   }
 
+  if (git_remote_connect(remote, GIT_DIR_FETCH) < 0)
+	  return -1;
+
+  // Download the packfile and index it
+  // Doing this in a background thread and printing out what bytes
+  // and stats.{processed,total} say would make the UI friendlier
+  if (git_remote_download(remote, &bytes, &stats) < 0) {
+	  git_remote_free(remote);
+	  return -1;
+  }
+
+  printf("Received %d objects in %d bytes\n", stats.total, bytes);
+
   // Update the references in the remote's namespace to point to the
   // right commits. This may be needed even if there was no packfile
   // to download, which can happen e.g. when the branches have been
   // changed but all the neede objects are available locally.
-  error = git_remote_update_tips(remote);
+  if (git_remote_update_tips(remote) < 0)
-  if (error < GIT_SUCCESS)
+	  return -1;
-    return error;
 
-  free(packname);
-  git_indexer_free(idx);
   git_remote_free(remote);
 
-  return GIT_SUCCESS;
+  return 0;
+
+on_error:
+  git_remote_free(remote);
+  return -1;
 }