thodg/libgit2/src/reflog.c

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• Hash : 13c9e44a
  Author :
  Date : 2013-11-14T19:41:09
  

  reflog: remove git_reflog_append_to() This was a convenience method for the refs front-end to do the reflog writing. This is now done in the backend and it has no more reason for being.

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• src/reflog.c

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * 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 "reflog.h"
  #include "repository.h"
  #include "filebuf.h"
  #include "signature.h"
  #include "refdb.h"
  
  #include <git2/sys/refdb_backend.h>
  
  git_reflog_entry *git_reflog_entry__alloc(void)
  {
  	return git__calloc(1, sizeof(git_reflog_entry));
  }
  
  void git_reflog_entry__free(git_reflog_entry *entry)
  {
  	git_signature_free(entry->committer);
  
  	git__free(entry->msg);
  	git__free(entry);
  }
  
  void git_reflog_free(git_reflog *reflog)
  {
  	size_t i;
  	git_reflog_entry *entry;
  
  	if (reflog == NULL)
  		return;
  
  	if (reflog->db)
  		GIT_REFCOUNT_DEC(reflog->db, git_refdb__free);
  
  	for (i=0; i < reflog->entries.length; i++) {
  		entry = git_vector_get(&reflog->entries, i);
  
  		git_reflog_entry__free(entry);
  	}
  
  	git_vector_free(&reflog->entries);
  	git__free(reflog->ref_name);
  	git__free(reflog);
  }
  
  int git_reflog_read(git_reflog **reflog, git_repository *repo,  const char *name)
  {
  	git_refdb *refdb;
  	int error;
  
  	assert(reflog && repo && name);
  
  	if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
  		return error;
  
  	return git_refdb_reflog_read(reflog, refdb, name);
  }
  
  int git_reflog_write(git_reflog *reflog)
  {
  	git_refdb *db;
  
  	assert(reflog && reflog->db);
  
  	db = reflog->db;
  	return db->backend->reflog_write(db->backend, reflog);
  }
  
  int git_reflog_append(git_reflog *reflog, const git_oid *new_oid, const git_signature *committer, const char *msg)
  {
  	git_reflog_entry *entry;
  	const git_reflog_entry *previous;
  	const char *newline;
  
  	assert(reflog && new_oid && committer);
  
  	entry = git__calloc(1, sizeof(git_reflog_entry));
  	GITERR_CHECK_ALLOC(entry);
  
  	if ((entry->committer = git_signature_dup(committer)) == NULL)
  		goto cleanup;
  
  	if (msg != NULL) {
  		if ((entry->msg = git__strdup(msg)) == NULL)
  			goto cleanup;
  
  		newline = strchr(msg, '\n');
  
  		if (newline) {
  			if (newline[1] != '\0') {
  				giterr_set(GITERR_INVALID, "Reflog message cannot contain newline");
  				goto cleanup;
  			}
  
  			entry->msg[newline - msg] = '\0';
  		}
  	}
  
  	previous = git_reflog_entry_byindex(reflog, 0);
  
  	if (previous == NULL)
  		git_oid_fromstr(&entry->oid_old, GIT_OID_HEX_ZERO);
  	else
  		git_oid_cpy(&entry->oid_old, &previous->oid_cur);
  
  	git_oid_cpy(&entry->oid_cur, new_oid);
  
  	if (git_vector_insert(&reflog->entries, entry) < 0)
  		goto cleanup;
  
  	return 0;
  
  cleanup:
  	git_reflog_entry__free(entry);
  	return -1;
  }
  
  int git_reflog_rename(git_repository *repo, const char *old_name, const char *new_name)
  {
  	git_refdb *refdb;
  	int error;
  
  	if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
  		return -1;
  
  	return refdb->backend->reflog_rename(refdb->backend, old_name, new_name);
  }
  
  int git_reflog_delete(git_repository *repo, const char *name)
  {
  	git_refdb *refdb;
  	int error;
  
  	if ((error = git_repository_refdb__weakptr(&refdb, repo)) < 0)
  		return -1;
  
  	return refdb->backend->reflog_delete(refdb->backend, name);
  }
  
  size_t git_reflog_entrycount(git_reflog *reflog)
  {
  	assert(reflog);
  	return reflog->entries.length;
  }
  
  const git_reflog_entry * git_reflog_entry_byindex(git_reflog *reflog, size_t idx)
  {
  	assert(reflog);
  
  	if (idx >= reflog->entries.length)
  		return NULL;
  
  	return git_vector_get(
  		&reflog->entries, reflog_inverse_index(idx, reflog->entries.length));
  }
  
  const git_oid * git_reflog_entry_id_old(const git_reflog_entry *entry)
  {
  	assert(entry);
  	return &entry->oid_old;
  }
  
  const git_oid * git_reflog_entry_id_new(const git_reflog_entry *entry)
  {
  	assert(entry);
  	return &entry->oid_cur;
  }
  
  const git_signature * git_reflog_entry_committer(const git_reflog_entry *entry)
  {
  	assert(entry);
  	return entry->committer;
  }
  
  const char * git_reflog_entry_message(const git_reflog_entry *entry)
  {
  	assert(entry);
  	return entry->msg;
  }
  
  int git_reflog_drop(git_reflog *reflog, size_t idx, int rewrite_previous_entry)
  {
  	size_t entrycount;
  	git_reflog_entry *entry, *previous;
  
  	entrycount = git_reflog_entrycount(reflog);
  
  	entry = (git_reflog_entry *)git_reflog_entry_byindex(reflog, idx);
  
  	if (entry == NULL) {
  		giterr_set(GITERR_REFERENCE, "No reflog entry at index "PRIuZ, idx);
  		return GIT_ENOTFOUND;
  	}
  
  	git_reflog_entry__free(entry);
  
  	if (git_vector_remove(
  			&reflog->entries, reflog_inverse_index(idx, entrycount)) < 0)
  		return -1;
  
  	if (!rewrite_previous_entry)
  		return 0;
  
  	/* No need to rewrite anything when removing the most recent entry */
  	if (idx == 0)
  		return 0;
  
  	/* Have the latest entry just been dropped? */
  	if (entrycount == 1)
  		return 0;
  
  	entry = (git_reflog_entry *)git_reflog_entry_byindex(reflog, idx - 1);
  
  	/* If the oldest entry has just been removed... */
  	if (idx == entrycount - 1) {
  		/* ...clear the oid_old member of the "new" oldest entry */
  		if (git_oid_fromstr(&entry->oid_old, GIT_OID_HEX_ZERO) < 0)
  			return -1;
  
  		return 0;
  	}
  
  	previous = (git_reflog_entry *)git_reflog_entry_byindex(reflog, idx);
  	git_oid_cpy(&entry->oid_old, &previous->oid_cur);
  
  	return 0;
  }
  

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