Moved rev_parse code into gitdb, this probably broke pretty much here, which is still to be fixed of course

1 files changed, 2 insertions, 276 deletions

diff --git a/git/repo/fun.py b/git/repo/fun.py
index 03d55716..7529897d 100644
--- a/git/repo/fun.py
+++ b/git/repo/fun.py
@@ -1,284 +1,10 @@
 """Package with general repository related functions"""
 import os
-from gitdb.exc import BadObject
-from git.refs import SymbolicReference
-from git.objects import Object
-from gitdb.util import (
-							join,
-							isdir, 
-							isfile,
-							hex_to_bin, 
-							bin_to_hex
-						)
-from string import digits
+from gitdb.util import is_git_dir
 
-__all__ = ('rev_parse', 'is_git_dir', 'touch')
+__all__ = ('is_git_dir', 'touch')
 
 def touch(filename):
 	fp = open(filename, "a")
 	fp.close()
 
-def is_git_dir(d):
-	""" This is taken from the git setup.c:is_git_directory
-	function."""
-	if isdir(d) and \
-			isdir(join(d, 'objects')) and \
-			isdir(join(d, 'refs')):
-		headref = join(d, 'HEAD')
-		return isfile(headref) or \
-				(os.path.islink(headref) and
-				os.readlink(headref).startswith('refs'))
-	return False
-
-
-def short_to_long(odb, hexsha):
-	""":return: long hexadecimal sha1 from the given less-than-40 byte hexsha
-		or None if no candidate could be found.
-	:param hexsha: hexsha with less than 40 byte"""
-	try:
-		return bin_to_hex(odb.partial_to_complete_sha_hex(hexsha))
-	except BadObject:
-		return None
-	# END exception handling
-	
-	
-def name_to_object(repo, name, return_ref=False):
-	"""
-	:return: object specified by the given name, hexshas ( short and long )
-		as well as references are supported
-	:param return_ref: if name specifies a reference, we will return the reference
-		instead of the object. Otherwise it will raise BadObject
-	"""
-	hexsha = None
-	
-	# is it a hexsha ? Try the most common ones, which is 7 to 40
-	if repo.re_hexsha_shortened.match(name):
-		if len(name) != 40:
-			# find long sha for short sha
-			hexsha = short_to_long(repo.odb, name)
-		else:
-			hexsha = name
-		# END handle short shas
-	#END find sha if it matches
-	
-	# if we couldn't find an object for what seemed to be a short hexsha 
-	# try to find it as reference anyway, it could be named 'aaa' for instance
-	if hexsha is None:
-		for base in ('%s', 'refs/%s', 'refs/tags/%s', 'refs/heads/%s', 'refs/remotes/%s', 'refs/remotes/%s/HEAD'):
-			try:
-				hexsha = SymbolicReference.dereference_recursive(repo, base % name)
-				if return_ref:
-					return SymbolicReference(repo, base % name)
-				#END handle symbolic ref
-				break
-			except ValueError:
-				pass
-		# END for each base
-	# END handle hexsha
-
-	# didn't find any ref, this is an error
-	if return_ref:
-		raise BadObject("Couldn't find reference named %r" % name)
-	#END handle return ref
-
-	# tried everything ? fail
-	if hexsha is None:
-		raise BadObject(name)
-	# END assert hexsha was found
-	
-	return Object.new_from_sha(repo, hex_to_bin(hexsha))
-
-def deref_tag(tag):
-	"""Recursively dereerence a tag and return the resulting object"""
-	while True:
-		try:
-			tag = tag.object
-		except AttributeError:
-			break
-	# END dereference tag
-	return tag
-
-def to_commit(obj):
-	"""Convert the given object to a commit if possible and return it"""
-	if obj.type == 'tag':
-		obj = deref_tag(obj)
-		
-	if obj.type != "commit":
-		raise ValueError("Cannot convert object %r to type commit" % obj)
-	# END verify type
-	return obj
-
-def rev_parse(repo, rev):
-	"""
-	:return: Object at the given revision, either Commit, Tag, Tree or Blob
-	:param rev: git-rev-parse compatible revision specification, please see
-		http://www.kernel.org/pub/software/scm/git/docs/git-rev-parse.html
-		for details
-	:note: Currently there is no access to the rev-log, rev-specs may only contain
-		topological tokens such ~ and ^.
-	:raise BadObject: if the given revision could not be found
-	:raise ValueError: If rev couldn't be parsed
-	:raise IndexError: If invalid reflog index is specified"""
-	
-	# colon search mode ?
-	if rev.startswith(':/'):
-		# colon search mode
-		raise NotImplementedError("commit by message search ( regex )")
-	# END handle search
-	
-	obj = None
-	ref = None
-	output_type = "commit"
-	start = 0
-	parsed_to = 0
-	lr = len(rev)
-	while start < lr:
-		if rev[start] not in "^~:@":
-			start += 1
-			continue
-		# END handle start
-		
-		token = rev[start]
-		
-		if obj is None:
-			# token is a rev name
-			if start == 0:
-				ref = repo.head.ref
-			else:
-				if token == '@':
-					ref = name_to_object(repo, rev[:start], return_ref=True)
-				else:
-					obj = name_to_object(repo, rev[:start])
-				#END handle token
-			#END handle refname
-			
-			if ref is not None:
-				obj = ref.commit
-			#END handle ref
-		# END initialize obj on first token
-		
-		
-		start += 1
-		
-		# try to parse {type}
-		if start < lr and rev[start] == '{':
-			end = rev.find('}', start)
-			if end == -1:
-				raise ValueError("Missing closing brace to define type in %s" % rev)
-			output_type = rev[start+1:end]	# exclude brace
-			
-			# handle type 
-			if output_type == 'commit':
-				pass # default
-			elif output_type == 'tree':
-				try:
-					obj = to_commit(obj).tree
-				except (AttributeError, ValueError):
-					pass	# error raised later
-				# END exception handling
-			elif output_type in ('', 'blob'):
-				if obj.type == 'tag':
-					obj = deref_tag(obj)
-				else:
-					# cannot do anything for non-tags
-					pass
-				# END handle tag
-			elif token == '@':
-				# try single int
-				assert ref is not None, "Requre Reference to access reflog"
-				revlog_index = None
-				try:
-					# transform reversed index into the format of our revlog
-					revlog_index = -(int(output_type)+1)
-				except ValueError:
-					# TODO: Try to parse the other date options, using parse_date
-					# maybe
-					raise NotImplementedError("Support for additional @{...} modes not implemented")
-				#END handle revlog index
-				
-				try:
-					entry = ref.log_entry(revlog_index)
-				except IndexError:
-					raise IndexError("Invalid revlog index: %i" % revlog_index)
-				#END handle index out of bound
-				
-				obj = Object.new_from_sha(repo, hex_to_bin(entry.newhexsha))
-				
-				# make it pass the following checks
-				output_type = None
-			else:
-				raise ValueError("Invalid output type: %s ( in %s )"  % (output_type, rev))
-			# END handle output type
-			
-			# empty output types don't require any specific type, its just about dereferencing tags
-			if output_type and obj.type != output_type:
-				raise ValueError("Could not accomodate requested object type %r, got %s" % (output_type, obj.type))
-			# END verify ouput type
-			
-			start = end+1					# skip brace
-			parsed_to = start
-			continue
-		# END parse type
-		
-		# try to parse a number
-		num = 0
-		if token != ":":
-			found_digit = False
-			while start < lr:
-				if rev[start] in digits:
-					num = num * 10 + int(rev[start])
-					start += 1
-					found_digit = True
-				else:
-					break
-				# END handle number
-			# END number parse loop
-			
-			# no explicit number given, 1 is the default
-			# It could be 0 though 
-			if not found_digit:
-				num = 1
-			# END set default num
-		# END number parsing only if non-blob mode
-		
-		
-		parsed_to = start
-		# handle hiererarchy walk
-		try:
-			if token == "~":
-				obj = to_commit(obj)
-				for item in xrange(num):
-					obj = obj.parents[0]
-				# END for each history item to walk
-			elif token == "^":
-				obj = to_commit(obj)
-				# must be n'th parent
-				if num:
-					obj = obj.parents[num-1]
-			elif token == ":":
-				if obj.type != "tree":
-					obj = obj.tree
-				# END get tree type
-				obj = obj[rev[start:]]
-				parsed_to = lr
-			else:
-				raise ValueError("Invalid token: %r" % token)
-			# END end handle tag
-		except (IndexError, AttributeError):
-			raise BadObject("Invalid Revision in %s" % rev)
-		# END exception handling
-	# END parse loop
-	
-	# still no obj ? Its probably a simple name
-	if obj is None:
-		obj = name_to_object(repo, rev)
-		parsed_to = lr
-	# END handle simple name
-	
-	if obj is None:
-		raise ValueError("Revision specifier could not be parsed: %s" % rev)
-
-	if parsed_to != lr:
-		raise ValueError("Didn't consume complete rev spec %s, consumed part: %s" % (rev, rev[:parsed_to]))
-	
-	return obj