Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
-import sys, os, glob, popen2
+import sys, os, popen2
from stgit.utils import *
self.__author = field[1]
if field[0] == 'committer':
self.__committer = field[1]
- self.__log = ''.join(lines[i:])
+ self.__log = ''.join(lines[i+1:])
def get_id_hash(self):
return self.__id_hash
"""Commit objects factory. Save/look-up them in the __commits
dictionary
"""
+ global __commits
+
if id_hash in __commits:
return __commits[id_hash]
else:
"""
return len(__tree_status()) != 0
+# HEAD value cached
+__head = None
+
def get_head():
- """Returns a string representing the HEAD
+ """Verifies the HEAD and returns the SHA1 id that represents it
"""
- return read_string(head_link)
+ global __head
+
+ if not __head:
+ __head = rev_parse('HEAD')
+ return __head
def get_head_file():
"""Returns the name of the file pointed to by the HEAD link
"""
- # valid link
- if os.path.islink(head_link) and os.path.isfile(head_link):
- return os.path.basename(os.readlink(head_link))
- else:
- raise GitException, 'Invalid .git/HEAD link. Git tree not initialised?'
+ return os.path.basename(_output_one_line('git-symbolic-ref HEAD'))
+
+def set_head_file(ref):
+ """Resets HEAD to point to a new ref
+ """
+ # head cache flushing is needed since we might have a different value
+ # in the new head
+ __clear_head_cache()
+ if __run('git-symbolic-ref HEAD', [ref]) != 0:
+ raise GitException, 'Could not set head to "%s"' % ref
def __set_head(val):
"""Sets the HEAD value
"""
- write_string(head_link, val)
+ global __head
+
+ if not __head or __head != val:
+ if __run('git-update-ref HEAD', [val]) != 0:
+ raise GitException, 'Could not update HEAD to "%s".' % val
+ __head = val
+
+def __clear_head_cache():
+ """Sets the __head to None so that a re-read is forced
+ """
+ global __head
+
+ __head = None
+
+def rev_parse(git_id):
+ """Parse the string and return a verified SHA1 id
+ """
+ try:
+ return _output_one_line(['git-rev-parse', '--verify', git_id])
+ except GitException:
+ raise GitException, 'Unknown revision: %s' % git_id
+
+def branch_exists(branch):
+ """Existance check for the named branch
+ """
+ for line in _output_lines(['git-rev-parse', '--symbolic', '--all']):
+ if line.strip() == branch:
+ return True
+ return False
+
+def create_branch(new_branch, tree_id = None):
+ """Create a new branch in the git repository
+ """
+ new_head = os.path.join('refs', 'heads', new_branch)
+ if branch_exists(new_head):
+ raise GitException, 'Branch "%s" already exists' % new_branch
+
+ current_head = get_head()
+ set_head_file(new_head)
+ __set_head(current_head)
+
+ # a checkout isn't needed if new branch points to the current head
+ if tree_id:
+ switch(tree_id)
+
+ if os.path.isfile(os.path.join(base_dir, 'MERGE_HEAD')):
+ os.remove(os.path.join(base_dir, 'MERGE_HEAD'))
+
+def switch_branch(name):
+ """Switch to a git branch
+ """
+ global __head
+
+ new_head = os.path.join('refs', 'heads', name)
+ if not branch_exists(new_head):
+ raise GitException, 'Branch "%s" does not exist' % name
+
+ tree_id = rev_parse(new_head + '^0')
+ if tree_id != get_head():
+ if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
+ raise GitException, 'git-read-tree failed (local changes maybe?)'
+ __head = tree_id
+ set_head_file(new_head)
+
+ if os.path.isfile(os.path.join(base_dir, 'MERGE_HEAD')):
+ os.remove(os.path.join(base_dir, 'MERGE_HEAD'))
+
+def delete_branch(name):
+ """Delete a git branch
+ """
+ branch_head = os.path.join('refs', 'heads', name)
+ if not branch_exists(branch_head):
+ raise GitException, 'Branch "%s" does not exist' % name
+ os.remove(os.path.join(base_dir, branch_head))
+
+def rename_branch(from_name, to_name):
+ """Rename a git branch
+ """
+ from_head = os.path.join('refs', 'heads', from_name)
+ if not branch_exists(from_head):
+ raise GitException, 'Branch "%s" does not exist' % from_name
+ to_head = os.path.join('refs', 'heads', to_name)
+ if branch_exists(to_head):
+ raise GitException, 'Branch "%s" already exists' % to_name
+
+ if get_head_file() == from_name:
+ set_head_file(to_head)
+ os.rename(os.path.join(base_dir, from_head), os.path.join(base_dir, to_head))
def add(names):
"""Add the files or recursively add the directory contents
return commit_id
+def apply_diff(rev1, rev2):
+ """Apply the diff between rev1 and rev2 onto the current
+ index. This function doesn't need to raise an exception since it
+ is only used for fast-pushing a patch. If this operation fails,
+ the pushing would fall back to the three-way merge.
+ """
+ return os.system('git-diff-tree -p %s %s | git-apply --index 2> /dev/null'
+ % (rev1, rev2)) == 0
+
def merge(base, head1, head2):
"""Perform a 3-way merge between base, head1 and head2 into the
local tree
"""Pull changes from the remote repository. At the moment, just
use the 'git pull' command
"""
+ # 'git pull' updates the HEAD
+ __clear_head_cache()
+
args = [repository]
if refspec:
args.append(refspec)
if __run('git pull', args) != 0:
raise GitException, 'Failed "git pull %s"' % repository
-def apply_patch(filename = None):
- """Apply a patch onto the current index. There must not be any
- local changes in the tree, otherwise the command fails
+def apply_patch(filename = None, base = None):
+ """Apply a patch onto the current or given index. There must not
+ be any local changes in the tree, otherwise the command fails
"""
+ def __apply_patch():
+ if filename:
+ return __run('git-apply --index', [filename]) == 0
+ else:
+ try:
+ _input('git-apply --index', sys.stdin)
+ except GitException:
+ return False
+ return True
+
os.system('git-update-index --refresh > /dev/null')
- if filename:
- if __run('git-apply --index', [filename]) != 0:
- raise GitException, 'Patch does not apply cleanly'
- else:
- _input('git-apply --index', sys.stdin)
+ if base:
+ orig_head = get_head()
+ switch(base)
+
+ if not __apply_patch():
+ if base:
+ switch(orig_head)
+ raise GitException, 'Patch does not apply cleanly'
+ elif base:
+ top = commit(message = 'temporary commit used for applying a patch',
+ parents = [base])
+ switch(orig_head)
+ merge(base, orig_head, top)
def clone(repository, local_dir):
"""Clone a remote repository. At the moment, just use the
~mdw / stgit / blobdiff