/kf6-qt6/sdk/kde-dev-scripts/reviewboarddiff

0001 #!/usr/bin/env python
0002 # encoding: utf-8
0003 #
0004 # Generates reviewboard compatible diffs from git-svn repositories.
0005 #
0006 # Licence: GPL v3
0007 # Author: Aurélien Gâteau <agateau@kde.org>
0008 #
0009 # Based on a shell script by Riccardo Iaconelli <riccardo@kde.org>
0010 import sys
0011 from subprocess import *
0012 USAGE="""
0013 Prints a reviewboard-compatible diff from a git-svn repository on stdout.
0014
0015 Usage: reviewboarddiff <git-diff-args>
0016
0017 Examples:
0018     reviewboarddiff HEAD  : generates diff for uncommitted changes
0019     reviewboarddiff HEAD^ : generates diff for latest commit
0020     reviewboarddiff HEAD~3: generates diff for 3 latest commits
0021 """
0022
0023 def run(*args):
0024     process = Popen(args, stdout=PIPE)
0025     out, err = process.communicate()
0026     if process.returncode != 0:
0027         print >>sys.stderr, "Command '%s' failed:" % " ".join(args)
0028         print >>sys.stderr, err
0029         sys.exit(1)
0030     return out.rstrip()
0031
0032 def add_suffix(line, suffix):
0033     return line.rstrip() + suffix + "\n"
0034
0035 def generate_diff(diff_args):
0036     wc_suffix = "  (working copy)"
0037     new_suffix = "  (revision 0)"
0038
0039     rev_list = run("git", "rev-list", "--date-order", "--max-count=1", "git-svn")
0040     rev = run("git", "svn", "find-rev", rev_list)
0041     rev_suffix = "  (revision %s)" % rev
0042
0043     out = Popen(["git", "diff", "--no-prefix"] + diff_args, stdout=PIPE).stdout
0044
0045     while True:
0046         line = out.readline()
0047         if not line:
0048             break
0049
0050         """
0051         git outputs new files as
0052         --- /dev/null
0053         +++ /new/file
0054
0055         while svn prefers:
0056
0057         --- /new/file  (revision 0)
0058         +++ /new/file  (working copy)
0059
0060         We skip the "--- /dev/null" line, read the next line (+++ /new/file)
0061         and recreate "--- /new/file" from it
0062         """
0063         if line.startswith("--- /dev/null"):
0064             line = out.readline()
0065             null_line = add_suffix(line.replace("+++", "---"), new_suffix)
0066             sys.stdout.write(null_line)
0067
0068         # Add suffixes
0069         if line.startswith("---"):
0070             line = add_suffix(line, rev_suffix)
0071         elif line.startswith("+++"):
0072             line = add_suffix(line, wc_suffix)
0073
0074         sys.stdout.write(line)
0075
0076     return 0
0077
0078 def main(argv):
0079     if len(argv) == 1:
0080         print USAGE
0081         return -1
0082     return generate_diff(argv[1:])
0083
0084 if __name__=="__main__":
0085     sys.exit(main(sys.argv))
0086 # vi: ts=4 sw=4 et