thodg/libgit2/src/checkout.c

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• Hash : dc1b0909
  Author :
  Date : 2012-07-13T16:44:13
  

  Create filtered_blob_contents out of parts on hand.

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• src/checkout.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 <assert.h>
  
  #include "git2/checkout.h"
  #include "git2/repository.h"
  #include "git2/refs.h"
  #include "git2/tree.h"
  #include "git2/commit.h"
  #include "git2/blob.h"
  
  #include "common.h"
  #include "refs.h"
  #include "buffer.h"
  #include "repository.h"
  #include "filter.h"
  
  GIT_BEGIN_DECL
  
  
  typedef struct tree_walk_data
  {
  	git_indexer_stats *stats;
  	git_repository *repo;
  	git_odb *odb;
  } tree_walk_data;
  
  
  static int unfiltered_blob_contents(git_buf *out, git_repository *repo, const git_oid *blob_id)
  {
  	int retcode = GIT_ERROR;
  
  	git_blob *blob;
  	if (!git_blob_lookup(&blob, repo, blob_id)) {
  		const void *contents = git_blob_rawcontent(blob);
  		size_t len = git_blob_rawsize(blob);
  		git_buf_clear(out);
  		git_buf_set(out, (const char*)contents, len);
  		git_blob_free(blob);
  		retcode = 0;
  	}
  	return retcode;
  }
  
  static int filtered_blob_contents(git_buf *out, git_repository *repo, const git_oid *oid, const char *path)
  {
  	int retcode = GIT_ERROR;
  
  	git_buf unfiltered = GIT_BUF_INIT;
  	if (!unfiltered_blob_contents(&unfiltered, repo, oid)) {
  		git_vector filters = GIT_VECTOR_INIT;
  		int filter_count = git_filters_load(&filters, repo,
  														path, GIT_FILTER_TO_WORKTREE);
  		if (filter_count >= 0) {
  			git_buf_clear(out);
  			if (!filter_count) {
  				git_buf_put(out, git_buf_cstr(&unfiltered), git_buf_len(&unfiltered));
  				retcode = 0;
  			} else {
  				retcode = git_filters_apply(out, &unfiltered, &filters);
  			}
  		}
  
  		git_filters_free(&filters);
  	}
  
  	git_buf_free(&unfiltered);
  	return retcode;
  }
  
  static int blob_contents_to_file(git_repository *repo, git_buf *fnbuf, const git_oid *id, int mode)
  {
  	int retcode = GIT_ERROR;
  
  	git_buf filteredcontents = GIT_BUF_INIT;
  	if (!filtered_blob_contents(&filteredcontents, repo, id, git_buf_cstr(fnbuf))) {
  		int fd = git_futils_creat_withpath(git_buf_cstr(fnbuf),
  													  GIT_DIR_MODE, mode);
  		if (fd >= 0) {
  			if (!p_write(fd, git_buf_cstr(&filteredcontents),
  							 git_buf_len(&filteredcontents)))
  				retcode = 0;
  			else
  				retcode = GIT_ERROR;
  			p_close(fd);
  		}
  	}
  	git_buf_free(&filteredcontents);
  
  	return retcode;
  }
  
  static int checkout_walker(const char *path, git_tree_entry *entry, void *payload)
  {
  	int retcode = 0;
  	tree_walk_data *data = (tree_walk_data*)payload;
  	int attr = git_tree_entry_attributes(entry);
  
  	/* TODO: handle submodules  */
  
  	if (S_ISLNK(attr)) {
  		printf("It's a link!\n'");
  	} else {
  		switch(git_tree_entry_type(entry)) {
  		case GIT_OBJ_TREE:
  			/* Nothing to do; the blob handling creates necessary directories. */
  			break;
  
  		case GIT_OBJ_BLOB:
  			{
  				git_buf fnbuf = GIT_BUF_INIT;
  				git_buf_join_n(&fnbuf, '/', 3,
  									git_repository_workdir(data->repo),
  									path,
  									git_tree_entry_name(entry));
  				retcode = blob_contents_to_file(data->repo, &fnbuf, git_tree_entry_id(entry), attr);
  				git_buf_free(&fnbuf);
  			}
  			break;
  
  		default:
  			retcode = -1;
  			break;
  		}
  	}
  
  	data->stats->processed++;
  	return retcode;
  }
  
  
  int git_checkout_force(git_repository *repo, git_indexer_stats *stats)
  {
  	int retcode = GIT_ERROR;
  	git_indexer_stats dummy_stats;
  	git_tree *tree;
  	tree_walk_data payload;
  
  	assert(repo);
  	if (!stats) stats = &dummy_stats;
  
  	if (git_repository_is_bare(repo)) {
  		giterr_set(GITERR_INVALID, "Checkout is not allowed for bare repositories");
  		return GIT_ERROR;
  	}
  
  	stats->total = stats->processed = 0;
  	payload.stats = stats;
  	payload.repo = repo;
  	if (git_repository_odb(&payload.odb, repo) < 0) return GIT_ERROR;
  
  	/* TODO: stats->total is never calculated. */
  
  	if (!git_repository_head_tree(&tree, repo)) {
  		/* Checkout the files */
  		if (!git_tree_walk(tree, checkout_walker, GIT_TREEWALK_POST, &payload)) {
  			retcode = 0;
  		}
  		git_tree_free(tree);
  	}
  
  	git_odb_free(payload.odb);
  	return retcode;
  }
  
  
  GIT_END_DECL
  

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