"""
import sys, os
+from stgit.exception import *
from stgit import basedir
-from stgit.config import file_extensions, ConfigOption
+from stgit.config import config, file_extensions, ConfigOption
from stgit.utils import append_string
+from stgit.out import *
+from stgit.run import *
-
-class GitMergeException(Exception):
+class GitMergeException(StgException):
pass
#
# Options
#
-merger = ConfigOption('stgit', 'merger')
+autoimerge = ConfigOption('stgit', 'autoimerge')
keeporig = ConfigOption('stgit', 'keeporig')
#
else:
return x
-def __output(cmd):
- f = os.popen(cmd, 'r')
- string = f.readline().rstrip()
- if f.close():
- raise GitMergeException, 'Error: failed to execute "%s"' % cmd
- return string
-
-def __checkout_files(orig_hash, file1_hash, file2_hash,
- path,
- orig_mode, file1_mode, file2_mode):
- """Check out the files passed as arguments
- """
- global orig, src1, src2
+class MRun(Run):
+ exc = GitMergeException # use a custom exception class on errors
+def __checkout_stages(filename):
+ """Check-out the merge stages in the index for the give file
+ """
extensions = file_extensions()
+ line = MRun('git', 'checkout-index', '--stage=all', '--', filename
+ ).output_one_line()
+ stages, path = line.split('\t')
+ stages = dict(zip(['ancestor', 'current', 'patched'],
+ stages.split(' ')))
+
+ for stage, fn in stages.iteritems():
+ if stages[stage] == '.':
+ stages[stage] = None
+ else:
+ newname = filename + extensions[stage]
+ if os.path.exists(newname):
+ # remove the stage if it is already checked out
+ os.remove(newname)
+ os.rename(stages[stage], newname)
+ stages[stage] = newname
- if orig_hash:
- orig = path + extensions['ancestor']
- tmp = __output('git-unpack-file %s' % orig_hash)
- os.chmod(tmp, int(orig_mode, 8))
- os.renames(tmp, orig)
- if file1_hash:
- src1 = path + extensions['current']
- tmp = __output('git-unpack-file %s' % file1_hash)
- os.chmod(tmp, int(file1_mode, 8))
- os.renames(tmp, src1)
- if file2_hash:
- src2 = path + extensions['patched']
- tmp = __output('git-unpack-file %s' % file2_hash)
- os.chmod(tmp, int(file2_mode, 8))
- os.renames(tmp, src2)
-
- if file1_hash and not os.path.exists(path):
- # the current file might be removed by GIT when it is a new
- # file added in both branches. Just re-generate it
- tmp = __output('git-unpack-file %s' % file1_hash)
- os.chmod(tmp, int(file1_mode, 8))
- os.renames(tmp, path)
-
-def __remove_files(orig_hash, file1_hash, file2_hash):
- """Remove any temporary files
+ return stages
+
+def __remove_stages(filename):
+ """Remove the merge stages from the working directory
"""
- if orig_hash:
- os.remove(orig)
- if file1_hash:
- os.remove(src1)
- if file2_hash:
- os.remove(src2)
-
-def __conflict(path):
- """Write the conflict file for the 'path' variable and exit
+ extensions = file_extensions()
+ for ext in extensions.itervalues():
+ fn = filename + ext
+ if os.path.isfile(fn):
+ os.remove(fn)
+
+def interactive_merge(filename):
+ """Run the interactive merger on the given file. Stages will be
+ removed according to stgit.keeporig. If successful and stages
+ kept, they will be removed via git.resolved().
"""
- append_string(os.path.join(basedir.get(), 'conflicts'), path)
-
+ stages = __checkout_stages(filename)
+
+ try:
+ # Check whether we have all the files for the merge.
+ if not (stages['current'] and stages['patched']):
+ raise GitMergeException('Cannot run the interactive merge')
+
+ if stages['ancestor']:
+ three_way = True
+ files_dict = {'branch1': stages['current'],
+ 'ancestor': stages['ancestor'],
+ 'branch2': stages['patched'],
+ 'output': filename}
+ imerger = config.get('stgit.i3merge')
+ else:
+ three_way = False
+ files_dict = {'branch1': stages['current'],
+ 'branch2': stages['patched'],
+ 'output': filename}
+ imerger = config.get('stgit.i2merge')
+
+ if not imerger:
+ raise GitMergeException, 'No interactive merge command configured'
+
+ mtime = os.path.getmtime(filename)
+
+ out.start('Trying the interactive %s merge'
+ % (three_way and 'three-way' or 'two-way'))
+ err = os.system(imerger % files_dict)
+ out.done()
+ if err != 0:
+ raise GitMergeException, 'The interactive merge failed'
+ if not os.path.isfile(filename):
+ raise GitMergeException, 'The "%s" file is missing' % filename
+ if mtime == os.path.getmtime(filename):
+ raise GitMergeException, 'The "%s" file was not modified' % filename
+ finally:
+ # keep the merge stages?
+ if str(keeporig) != 'yes':
+ __remove_stages(filename)
+
+def clean_up(filename):
+ """Remove merge conflict stages if they were generated.
+ """
+ if str(keeporig) == 'yes':
+ __remove_stages(filename)
-#
-# Main algorithm
-#
-def merge(orig_hash, file1_hash, file2_hash,
- path,
- orig_mode, file1_mode, file2_mode):
- """Three-way merge for one file algorithm
+def merge(filename):
+ """Merge one file if interactive is allowed or check out the stages
+ if keeporig is set.
"""
- __checkout_files(orig_hash, file1_hash, file2_hash,
- path,
- orig_mode, file1_mode, file2_mode)
-
- # file exists in origin
- if orig_hash:
- # modified in both
- if file1_hash and file2_hash:
- # if modes are the same (git-read-tree probably dealt with it)
- if file1_hash == file2_hash:
- if os.system('git-update-index --cacheinfo %s %s %s'
- % (file1_mode, file1_hash, path)) != 0:
- print >> sys.stderr, 'Error: git-update-index failed'
- __conflict(path)
- return 1
- if os.system('git-checkout-index -u -f -- %s' % path):
- print >> sys.stderr, 'Error: git-checkout-index failed'
- __conflict(path)
- return 1
- if file1_mode != file2_mode:
- print >> sys.stderr, \
- 'Error: File added in both, permissions conflict'
- __conflict(path)
- return 1
- # 3-way merge
- else:
- merge_ok = os.system(str(merger) % {'branch1': src1,
- 'ancestor': orig,
- 'branch2': src2,
- 'output': path }) == 0
-
- if merge_ok:
- os.system('git-update-index -- %s' % path)
- __remove_files(orig_hash, file1_hash, file2_hash)
- return 0
- else:
- print >> sys.stderr, \
- 'Error: three-way merge tool failed for file "%s"' \
- % path
- # reset the cache to the first branch
- os.system('git-update-index --cacheinfo %s %s %s'
- % (file1_mode, file1_hash, path))
- if str(keeporig) != 'yes':
- __remove_files(orig_hash, file1_hash, file2_hash)
- __conflict(path)
- return 1
- # file deleted in both or deleted in one and unchanged in the other
- elif not (file1_hash or file2_hash) \
- or file1_hash == orig_hash or file2_hash == orig_hash:
- if os.path.exists(path):
- os.remove(path)
- __remove_files(orig_hash, file1_hash, file2_hash)
- return os.system('git-update-index --remove -- %s' % path)
- # file deleted in one and changed in the other
- else:
- # Do something here - we must at least merge the entry in
- # the cache, instead of leaving it in U(nmerged) state. In
- # fact, stg resolved does not handle that.
-
- # Do the same thing cogito does - remove the file in any case.
- os.system('git-update-index --remove -- %s' % path)
-
- #if file1_hash:
- ## file deleted upstream and changed in the patch. The
- ## patch is probably going to move the changes
- ## elsewhere.
-
- #os.system('git-update-index --remove -- %s' % path)
- #else:
- ## file deleted in the patch and changed upstream. We
- ## could re-delete it, but for now leave it there -
- ## and let the user check if he still wants to remove
- ## the file.
-
- ## reset the cache to the first branch
- #os.system('git-update-index --cacheinfo %s %s %s'
- # % (file1_mode, file1_hash, path))
- __conflict(path)
- return 1
-
- # file does not exist in origin
- else:
- # file added in both
- if file1_hash and file2_hash:
- # files are the same
- if file1_hash == file2_hash:
- if os.system('git-update-index --add --cacheinfo %s %s %s'
- % (file1_mode, file1_hash, path)) != 0:
- print >> sys.stderr, 'Error: git-update-index failed'
- __conflict(path)
- return 1
- if os.system('git-checkout-index -u -f -- %s' % path):
- print >> sys.stderr, 'Error: git-checkout-index failed'
- __conflict(path)
- return 1
- if file1_mode != file2_mode:
- print >> sys.stderr, \
- 'Error: File "s" added in both, ' \
- 'permissions conflict' % path
- __conflict(path)
- return 1
- # files are different
- else:
- # reset the index to the current file
- os.system('git-update-index -- %s' % path)
- print >> sys.stderr, \
- 'Error: File "%s" added in branches but different' % path
- __conflict(path)
- return 1
- # file added in one
- elif file1_hash or file2_hash:
- if file1_hash:
- mode = file1_mode
- obj = file1_hash
- else:
- mode = file2_mode
- obj = file2_hash
- if os.system('git-update-index --add --cacheinfo %s %s %s'
- % (mode, obj, path)) != 0:
- print >> sys.stderr, 'Error: git-update-index failed'
- __conflict(path)
- return 1
- __remove_files(orig_hash, file1_hash, file2_hash)
- return os.system('git-checkout-index -u -f -- %s' % path)
-
- # Unhandled case
- print >> sys.stderr, 'Error: Unhandled merge conflict: ' \
- '"%s" "%s" "%s" "%s" "%s" "%s" "%s"' \
- % (orig_hash, file1_hash, file2_hash,
- path,
- orig_mode, file1_mode, file2_mode)
- __conflict(path)
- return 1
+ if str(autoimerge) == 'yes':
+ try:
+ interactive_merge(filename)
+ except GitMergeException, ex:
+ out.error(str(ex))
+ return False
+ return True
+
+ if str(keeporig) == 'yes':
+ __checkout_stages(filename)
+
+ return False
~mdw / stgit / blobdiff