X-Git-Url: https://git.distorted.org.uk/~mdw/stgit/blobdiff_plain/a2597fc74859f62872cef838377568811f2b6362..0f92637c75d03080d43a9b8a95527660d61d67a5:/stgit/git.py

diff --git a/stgit/git.py b/stgit/git.py
index 7d99338..86630ce 100644
--- a/stgit/git.py
+++ b/stgit/git.py
@@ -19,10 +19,12 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 """
 
 import sys, os, popen2, re, gitmergeonefile
+from shutil import copyfile
 
 from stgit import basedir
 from stgit.utils import *
 from stgit.config import config
+from sets import Set
 
 # git exception class
 class GitException(Exception):
@@ -38,6 +40,7 @@ class Person:
     """An author, committer, etc."""
     def __init__(self, name = None, email = None, date = '',
                  desc = None):
+        self.name = self.email = self.date = None
         if name or email or date:
             assert not desc
             self.name = name
@@ -295,14 +298,18 @@ def set_head_file(ref):
              [os.path.join('refs', 'heads', ref)]) != 0:
         raise GitException, 'Could not set head to "%s"' % ref
 
+def set_branch(branch, val):
+    """Point branch at a new commit object."""
+    if __run('git-update-ref', [branch, val]) != 0:
+        raise GitException, 'Could not update %s to "%s".' % (branch, val)
+
 def __set_head(val):
     """Sets the HEAD value
     """
     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
+        set_branch('HEAD', val)
         __head = val
 
     # only allow SHA1 hashes
@@ -426,6 +433,71 @@ def add(names):
         if __run('git-update-index --add --', files):
             raise GitException, 'Unable to add file'
 
+def __copy_single(source, target, target2=''):
+    """Copy file or dir named 'source' to name target+target2"""
+
+    # "source" (file or dir) must match one or more git-controlled file
+    realfiles = _output_lines(['git-ls-files', source])
+    if len(realfiles) == 0:
+        raise GitException, '"%s" matches no git-controled files' % source
+
+    if os.path.isdir(source):
+        # physically copy the files, and record them to add them in one run
+        newfiles = []
+        re_string='^'+source+'/(.*)$'
+        prefix_regexp = re.compile(re_string)
+        for f in [f.strip() for f in realfiles]:
+            m = prefix_regexp.match(f)
+            if not m:
+                print '"%s" does not match "%s"' % (f, re_string)
+                assert(m)
+            newname = target+target2+'/'+m.group(1)
+            if not os.path.exists(os.path.dirname(newname)):
+                os.makedirs(os.path.dirname(newname))
+            copyfile(f, newname)
+            newfiles.append(newname)
+
+        add(newfiles)
+    else: # files, symlinks, ...
+        newname = target+target2
+        copyfile(source, newname)
+        add([newname])
+
+
+def copy(filespecs, target):
+    if os.path.isdir(target):
+        # target is a directory: copy each entry on the command line,
+        # with the same name, into the target
+        target = target.rstrip('/')
+        
+        # first, check that none of the children of the target
+        # matching the command line aleady exist
+        for filespec in filespecs:
+            entry = target+ '/' + os.path.basename(filespec.rstrip('/'))
+            if os.path.exists(entry):
+                raise GitException, 'Target "%s" already exists' % entry
+        
+        for filespec in filespecs:
+            filespec = filespec.rstrip('/')
+            basename = '/' + os.path.basename(filespec)
+            __copy_single(filespec, target, basename)
+
+    elif os.path.exists(target):
+        raise GitException, 'Target "%s" exists but is not a directory' % target
+    elif len(filespecs) != 1:
+        raise GitException, 'Cannot copy more than one file to non-directory'
+
+    else:
+        # at this point: len(filespecs)==1 and target does not exist
+
+        # check target directory
+        targetdir = os.path.dirname(target)
+        if targetdir != '' and not os.path.isdir(targetdir):
+            raise GitException, 'Target directory "%s" does not exist' % targetdir
+
+        __copy_single(filespecs[0].rstrip('/'), target)
+        
+
 def rm(files, force = False):
     """Remove a file from the repository
     """
@@ -449,12 +521,9 @@ def user():
     """
     global __user
     if not __user:
-        if config.has_option('user', 'name') \
-               and config.has_option('user', 'email'):
-            __user = Person(config.get('user', 'name'),
-                            config.get('user', 'email'))
-        else:
-            raise GitException, 'unknown user details'
+        name=config.get('user.name')
+        email=config.get('user.email')
+        __user = Person(name, email)
     return __user;
 
 def author():
@@ -607,13 +676,15 @@ def merge(base, head1, head2, recursive = False):
     """
     refresh_index()
 
+    err_output = None
     if recursive:
         # this operation tracks renames but it is slower (used in
         # general when pushing or picking patches)
         try:
             # use _output() to mask the verbose prints of the tool
             _output('git-merge-recursive %s -- %s %s' % (base, head1, head2))
-        except GitException:
+        except GitException, ex:
+            err_output = str(ex)
             pass
     else:
         # the fast case where we don't track renames (used when the
@@ -641,6 +712,11 @@ def merge(base, head1, head2, recursive = False):
 
         files[path][stage] = (mode, hash)
 
+    if err_output and not files:
+        # if no unmerged files, there was probably a different type of
+        # error and we have to abort the merge
+        raise GitException, err_output
+
     # merge the unmerged files
     errors = False
     for path in files:
@@ -695,20 +771,28 @@ def status(files = None, modified = False, new = False, deleted = False,
         else:
             print '%s' % fs[1]
 
-def diff(files = None, rev1 = 'HEAD', rev2 = None, out_fd = None):
+def diff(files = None, rev1 = 'HEAD', rev2 = None, out_fd = None,
+         binary = False):
     """Show the diff between rev1 and rev2
     """
     if not files:
         files = []
 
+    args = []
+    if binary:
+        args.append('--binary')
+
     if rev1 and rev2:
-        diff_str = _output(['git-diff-tree', '-p', rev1, rev2, '--'] + files)
+        diff_str = _output(['git-diff-tree', '-p'] + args
+                           + [rev1, rev2, '--'] + files)
     elif rev1 or rev2:
         refresh_index()
         if rev2:
-            diff_str = _output(['git-diff-index', '-p', '-R', rev2, '--'] + files)
+            diff_str = _output(['git-diff-index', '-p', '-R']
+                               + args + [rev2, '--'] + files)
         else:
-            diff_str = _output(['git-diff-index', '-p', rev1, '--'] + files)
+            diff_str = _output(['git-diff-index', '-p']
+                               + args + [rev1, '--'] + files)
     else:
         diff_str = ''
 
@@ -807,19 +891,37 @@ def reset(files = None, tree_id = None, check_out = True):
     if not files:
         __set_head(tree_id)
 
+def fetch(repository = 'origin', refspec = None):
+    """Fetches changes from the remote repository, using 'git-fetch'
+    by default.
+    """
+    # we update the HEAD
+    __clear_head_cache()
+
+    args = [repository]
+    if refspec:
+        args.append(refspec)
+
+    command = config.get('branch.%s.stgit.fetchcmd' % get_head_file()) or \
+              config.get('stgit.fetchcmd')
+    if __run(command, args) != 0:
+        raise GitException, 'Failed "%s %s"' % (command, repository)
+
 def pull(repository = 'origin', refspec = None):
-    """Pull changes from the remote repository. At the moment, just
-    use the 'git-pull' command
+    """Fetches changes from the remote repository, using 'git-pull'
+    by default.
     """
-    # 'git-pull' updates the HEAD
+    # we update the HEAD
     __clear_head_cache()
 
     args = [repository]
     if refspec:
         args.append(refspec)
 
-    if __run(config.get('stgit', 'pullcmd'), args) != 0:
-        raise GitException, 'Failed "git-pull %s"' % repository
+    command = config.get('branch.%s.stgit.pullcmd' % get_head_file()) or \
+              config.get('stgit.pullcmd')
+    if __run(command, args) != 0:
+        raise GitException, 'Failed "%s %s"' % (command, repository)
 
 def repack():
     """Repack all objects into a single pack
@@ -874,10 +976,100 @@ def clone(repository, local_dir):
         raise GitException, 'Failed "git-clone %s %s"' \
               % (repository, local_dir)
 
-def modifying_revs(files, base_rev):
+def modifying_revs(files, base_rev, head_rev):
     """Return the revisions from the list modifying the given files
     """
-    cmd = ['git-rev-list', '%s..' % base_rev, '--']
+    cmd = ['git-rev-list', '%s..%s' % (base_rev, head_rev), '--']
     revs = [line.strip() for line in _output_lines(cmd + files)]
 
     return revs
+
+
+def refspec_localpart(refspec):
+    m = re.match('^[^:]*:([^:]*)$', refspec)
+    if m:
+        return m.group(1)
+    else:
+        raise GitException, 'Cannot parse refspec "%s"' % line
+
+def refspec_remotepart(refspec):
+    m = re.match('^([^:]*):[^:]*$', refspec)
+    if m:
+        return m.group(1)
+    else:
+        raise GitException, 'Cannot parse refspec "%s"' % line
+    
+
+def __remotes_from_config():
+    return config.sections_matching(r'remote\.(.*)\.url')
+
+def __remotes_from_dir(dir):
+    d = os.path.join(basedir.get(), dir)
+    if os.path.exists(d):
+        return os.listdir(d)
+    else:
+        return None
+
+def remotes_list():
+    """Return the list of remotes in the repository
+    """
+
+    return Set(__remotes_from_config()) | \
+           Set(__remotes_from_dir('remotes')) | \
+           Set(__remotes_from_dir('branches'))
+
+def remotes_local_branches(remote):
+    """Returns the list of local branches fetched from given remote
+    """
+
+    branches = []
+    if remote in __remotes_from_config():
+        for line in config.getall('remote.%s.fetch' % remote):
+            branches.append(refspec_localpart(line))
+    elif remote in __remotes_from_dir('remotes'):
+        stream = open(os.path.join(basedir.get(), 'remotes', remote), 'r')
+        for line in stream:
+            # Only consider Pull lines
+            m = re.match('^Pull: (.*)\n$', line)
+            if m:
+                branches.append(refspec_localpart(m.group(1)))
+        stream.close()
+    elif remote in __remotes_from_dir('branches'):
+        # old-style branches only declare one branch
+        branches.append('refs/heads/'+remote);
+    else:
+        raise GitException, 'Unknown remote "%s"' % remote
+
+    return branches
+
+def identify_remote(branchname):
+    """Return the name for the remote to pull the given branchname
+    from, or None if we believe it is a local branch.
+    """
+
+    for remote in remotes_list():
+        if branchname in remotes_local_branches(remote):
+            return remote
+
+    # if we get here we've found nothing, the branch is a local one
+    return None
+
+def fetch_head():
+    """Return the git id for the tip of the parent branch as left by
+    'git fetch'.
+    """
+
+    fetch_head=None
+    stream = open(os.path.join(basedir.get(), 'FETCH_HEAD'), "r")
+    for line in stream:
+        # Only consider lines not tagged not-for-merge
+        m = re.match('^([^\t]*)\t\t', line)
+        if m:
+            if fetch_head:
+                raise GitException, "StGit does not support multiple FETCH_HEAD"
+            else:
+                fetch_head=m.group(1)
+    stream.close()
+
+    # here we are sure to have a single fetch_head
+    return fetch_head