thodg/libgit2/src/fetch.c

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• Hash : 09cc0b92
  Author :
  Date : 2012-11-05T11:33:10
  

  create callback to handle packs from fetch, move the indexer to odb_pack

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• src/fetch.c

• /*
   * Copyright (C) 2009-2012 the libgit2 contributors
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #include "git2/oid.h"
  #include "git2/refs.h"
  #include "git2/revwalk.h"
  #include "git2/transport.h"
  
  #include "common.h"
  #include "remote.h"
  #include "refspec.h"
  #include "pack.h"
  #include "fetch.h"
  #include "netops.h"
  
  struct filter_payload {
  	git_remote *remote;
  	const git_refspec *spec, *tagspec;
  	git_odb *odb;
  	int found_head;
  };
  
  static int filter_ref__cb(git_remote_head *head, void *payload)
  {
  	struct filter_payload *p = payload;
  	int match = 0;
  
  	if (!git_reference_is_valid_name(head->name))
  		return 0;
  
  	if (!p->found_head && strcmp(head->name, GIT_HEAD_FILE) == 0)
  		p->found_head = 1;
  	else if (git_refspec_src_matches(p->spec, head->name))
  			match = 1;
  	else if (p->remote->download_tags == GIT_REMOTE_DOWNLOAD_TAGS_ALL &&
  		 git_refspec_src_matches(p->tagspec, head->name))
  			match = 1;
  
  	if (!match)
  		return 0;
  
  	/* If we have the object, mark it so we don't ask for it */
  	if (git_odb_exists(p->odb, &head->oid))
  		head->local = 1;
  	else
  		p->remote->need_pack = 1;
  
  	return git_vector_insert(&p->remote->refs, head);
  }
  
  static int filter_wants(git_remote *remote)
  {
  	struct filter_payload p;
  	git_refspec tagspec;
  	int error = -1;
  
  	git_vector_clear(&remote->refs);
  	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
  		return error;
  
  	/*
  	 * The fetch refspec can be NULL, and what this means is that the
  	 * user didn't specify one. This is fine, as it means that we're
  	 * not interested in any particular branch but just the remote's
  	 * HEAD, which will be stored in FETCH_HEAD after the fetch.
  	 */
  	p.spec = git_remote_fetchspec(remote);
  	p.tagspec = &tagspec;
  	p.found_head = 0;
  	p.remote = remote;
  
  	if (git_repository_odb__weakptr(&p.odb, remote->repo) < 0)
  		goto cleanup;
  
  	error = git_remote_ls(remote, filter_ref__cb, &p);
  
  cleanup:
  	git_refspec__free(&tagspec);
  
  	return error;
  }
  
  /*
   * In this first version, we push all our refs in and start sending
   * them out. When we get an ACK we hide that commit and continue
   * traversing until we're done
   */
  int git_fetch_negotiate(git_remote *remote)
  {
  	git_transport *t = remote->transport;
  	
  	if (filter_wants(remote) < 0) {
  		giterr_set(GITERR_NET, "Failed to filter the reference list for wants");
  		return -1;
  	}
  
  	/* Don't try to negotiate when we don't want anything */
  	if (remote->refs.length == 0 || !remote->need_pack)
  		return 0;
  
  	/*
  	 * Now we have everything set up so we can start tell the
  	 * server what we want and what we have.
  	 */
  	return t->negotiate_fetch(t,
  		remote->repo,
  		(const git_remote_head * const *)remote->refs.contents,
  		remote->refs.length);
  }
  
  int git_fetch_download_pack(
  	git_remote *remote,
  	git_transfer_progress_callback progress_cb,
  	void *progress_payload)
  {
  	git_transport *t = remote->transport;
  
  	if(!remote->need_pack)
  		return 0;
  
  	return t->download_pack(t, remote->repo, &remote->stats, progress_cb, progress_payload);
  }
  

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