On Tue, Jan 1, 2013 at 11:26 AM, Eric S. Raymond <e...@thyrsus.com> wrote:
> diff --git a/git-cvsimport.py b/git-cvsimport.py
> new file mode 100755
> index 0000000..6407e8a
> --- /dev/null
> +++ b/git-cvsimport.py
> @@ -0,0 +1,342 @@
> +#!/usr/bin/env python
> +#
> +# Import CVS history into git
> +#
> +# Intended to be a near-workalike of Matthias Urlichs's Perl implementation.
> +#
> +# By Eric S. Raymond <e...@thyrsus.com>, December 2012
> +# May be redistributed under the license of the git project.
> +
> +import sys
> +
> +if sys.hexversion < 0x02060000:
> + sys.stderr.write("git cvsimport: requires Python 2.6 or later.\n")
> + sys.exit(1)
> +
> +import os, getopt, subprocess, tempfile, shutil
> +
> +DEBUG_COMMANDS = 1
> +
> +class Fatal(Exception):
> + "Unrecoverable error."
> + def __init__(self, msg):
> + Exception.__init__(self)
> + self.msg = msg
> +
> +def do_or_die(dcmd, legend=""):
> + "Either execute a command or raise a fatal exception."
> + if legend:
> + legend = " " + legend
> + if verbose >= DEBUG_COMMANDS:
> + sys.stdout.write("git cvsimport: executing '%s'%s\n" % (dcmd,
> legend))
> + try:
> + retcode = subprocess.call(dcmd, shell=True)
> + if retcode < 0:
> + raise Fatal("git cvsimport: child was terminated by signal %d."
> % -retcode)
> + elif retcode != 0:
> + raise Fatal("git cvsimport: child returned %d." % retcode)
> + except (OSError, IOError) as e:
> + raise Fatal("git cvsimport: execution of %s%s failed: %s" % (dcmd,
> legend, e))
> +
> +def capture_or_die(dcmd, legend=""):
> + "Either execute a command and capture its output or die."
> + if legend:
> + legend = " " + legend
> + if verbose >= DEBUG_COMMANDS:
> + sys.stdout.write("git cvsimport: executing '%s'%s\n" % (dcmd,
> legend))
> + try:
> + return subprocess.check_output(dcmd, shell=True)
> + except subprocess.CalledProcessError as e:
> + if e.returncode < 0:
> + sys.stderr.write("git cvsimport: child was terminated by signal
> %d." % -e.returncode)
> + elif e.returncode != 0:
> + sys.stderr.write("git cvsimport: child returned %d." %
> e.returncode)
> + sys.exit(1)
> +
> +class cvsps:
> + "Method class for cvsps back end."
> + def __init__(self):
> + self.opts = ""
> + self.revmap = None
> + def set_repo(self, val):
> + "Set the repository root option."
> + if not val.startswith(":"):
> + if not val.startswith(os.sep):
> + val = os.path.abspath(val)
> + val = ":local:" + val
> + self.opts += " --root '%s'" % val
> + def set_authormap(self, val):
> + "Set the author-map file."
> + self.opts += " -A '%s'" % val
> + def set_fuzz(self, val):
> + "Set the commit-similarity window."
> + self.opts += " -z %s" % val
> + def set_nokeywords(self):
> + "Suppress CVS keyword expansion."
> + self.opts += " -k"
> + def add_opts(self, val):
> + "Add options to the engine command line."
> + self.opts += " " + val
> + def set_exclusion(self, val):
> + "Set a file exclusion regexp."
> + self.opts += " -n -f '%s'" % val
> + def set_after(self, val):
> + "Set a date threshold for incremental import."
> + self.opts += " -d '%s'" % val
> + def set_revmap(self, val):
> + "Set the file to which the engine should dump a reference map."
> + self.revmap = val
> + self.opts += " -R '%s'" % self.revmap
> + def set_module(self, val):
> + "Set the module to query."
> + self.opts += " " + val
> + def command(self):
> + "Emit the command implied by all previous options."
> + return "cvsps --fast-export " + self.opts
> +
> +class cvs2git:
> + "Method class for cvs2git back end."
> + def __init__(self):
> + self.opts = ""
> + self.modulepath = "."
> + def set_authormap(self, _val):
> + "Set the author-map file."
> + sys.stderr.write("git cvsimport: author maping is not supported with
> cvs2git.\n")
> + sys.exit(1)
> + def set_repo(self, _val):
> + "Set the repository root option."
> + sys.stderr.write("git cvsimport: cvs2git must run within a
> repository checkout directory.\n")
> + sys.exit(1)
> + def set_fuzz(self, _val):
> + "Set the commit-similarity window."
> + sys.stderr.write("git cvsimport: fuzz setting is not supported with
> cvs2git.\n")
> + sys.exit(1)
> + def set_nokeywords(self):
> + "Suppress CVS keyword expansion."
> + self.opts += " --keywords-off"
> + def add_opts(self, val):
> + "Add options to the engine command line."
> + self.opts += " " + val
> + def set_exclusion(self, val):
> + "Set a file exclusion regexp."
> + self.opts += " --exclude='%s'" % val
> + def set_after(self, _val):
> + "Set a date threshold for incremental import."
> + sys.stderr.write("git cvsimport: incremental import is not supported
> with cvs2git.\n")
> + sys.exit(1)
> + def set_revmap(self, _val):
> + "Set the file to which the engine should dump a reference map."
> + sys.stderr.write("git cvsimport: can't get a reference map from
> cvs2git.\n")
> + sys.exit(1)
> + def set_module(self, val):
> + "Set the module to query."
> + self.modulepath = " " + val
> + def command(self):
> + "Emit the command implied by all previous options."
> + return "(cvs2git --username=git-cvsimport --quiet --quiet
> --blobfile={0} --dumpfile={1} {2} {3} && cat {0} {1} && rm {0}
> {1})".format(tempfile.mkstemp()[1], tempfile.mkstemp()[1], self.opts,
> self.modulepath)
> +
> +class filesource:
> + "Method class for file-source back end."
> + def __init__(self, filename):
> + self.filename = filename
> + def __complain(self, legend):
> + sys.stderr.write("git cvsimport: %s with file source.\n" % legend)
> + sys.exit(1)
> + def set_repo(self, _val):
> + "Set the repository root option."
> + self.__complain("repository can't be set")
> + def set_authormap(self, _val):
> + "Set the author-map file."
> + sys.stderr.write("git cvsimport: author maping is not supported with
> filesource.\n")
> + sys.exit(1)
> + def set_fuzz(self, _val):
> + "Set the commit-similarity window."
> + self.__complain("fuzz can't be set")
> + def set_nokeywords(self, _val):
> + "Suppress CVS keyword expansion."
> + self.__complain("keyword suppression can't be set")
> + def add_opts(self, _val):
> + "Add options to the engine command line."
> + self.__complain("other options can't be set")
> + def set_exclusion(self, _val):
> + "Set a file exclusion regexp."
> + self.__complain("exclusions can't be set")
> + def set_after(self, _val):
> + "Set a date threshold for incremental import."
> + pass
> + def set_revmap(self, _val):
> + "Set the file to which the engine should dump a reference map."
> + sys.stderr.write("git cvsimport: can't get a reference map from
> cvs2git.\n")
> + sys.exit(1)
> + def set_module(self, _val):
> + "Set the module to query."
> + self.__complain("module can't be set")
> + def command(self):
> + "Emit the command implied by all previous options."
> + return "cat " + self.filename
> +
> +if __name__ == '__main__':
> + if sys.hexversion < 0x02060000:
> + sys.stderr.write("git cvsimport: requires Python 2.6 or later.\n")
> + sys.exit(1)
> + (options, arguments) = getopt.getopt(sys.argv[1:],
> "vbe:d:C:r:o:ikus:p:z:P:S:aL:A:Rh")
> + verbose = 0
> + bare = False
> + root = None
> + outdir = os.getcwd()
> + remotize = False
> + import_only = False
> + underscore_to_dot = False
> + slashsubst = None
> + authormap = None
> + revisionmap = False
> + backend = cvsps()
> + for (opt, val) in options:
> + if opt == '-v':
> + verbose += 1
> + elif opt == '-b':
> + bare = True
> + elif opt == '-e':
> + for cls in (cvsps, cvs2git):
> + if cls.__name__ == val:
> + backend = cls()
> + break
> + else:
> + sys.stderr.write("git cvsimport: unknown engine %s.\n" % val)
> + sys.exit(1)
> + elif opt == '-d':
> + backend.set_repo(val)
> + elif opt == '-C':
> + outdir = val
> + elif opt == '-r':
> + remotize = True
> + elif opt == '-o':
> + sys.stderr.write("git cvsimport: -o is no longer supported.\n")
> + sys.exit(1)
> + elif opt == '-i':
> + import_only = True
> + elif opt == '-k':
> + backend.set_nokeywords()
> + elif opt == '-u':
> + underscore_to_dot = True
> + elif opt == '-s':
> + slashsubst = val
> + elif opt == '-p':
> + backend.add_opts(val.replace(",", " "))
> + elif opt == '-z':
> + backend.set_fuzz(val)
> + elif opt == '-P':
> + backend = filesource(val)
> + sys.exit(1)
> + elif opt in ('-m', '-M'):
> + sys.stderr.write("git cvsimport: -m and -M are no longer
> supported: use reposurgeon instead.\n")
> + sys.exit(1)
> + elif opt == '-S':
> + backend.set_exclusion(val)
> + elif opt == '-a':
> + sys.stderr.write("git cvsimport: -a is no longer supported.\n")
> + sys.exit(1)
> + elif opt == '-L':
> + sys.stderr.write("git cvsimport: -L is no longer supported.\n")
> + sys.exit(1)
> + elif opt == '-A':
> + authormap = os.path.abspath(val)
> + elif opt == '-R':
> + revisionmap = True
> + else:
> + print """\
> +git cvsimport [-A <author-conv-file>] [-C <git_repository>] [-b] [-d
> <CVSROOT>]
> + [-e engine] [-h] [-i] [-k] [-p <options-for-cvsps>] [-P <source-file>]
> + [-r <remote>] [-R] [-s <subst>] [-S <regex>] [-u] [-v] [-z <fuzz>]
> + [<CVS_module>]
> +"""
> +
> + def metadata(fn):
> + if bare:
> + return fn
> + else:
> + return os.path.join(".git", fn)
> + try:
> + if outdir:
> + try:
> + # If the output directory does not exist, create it
> + # and initialize it as a git repository.
> + os.mkdir(outdir)
> + do_or_die("git init --quiet " + outdir)
> + except OSError:
> + # Otherwise, assume user wants incremental import.
> + if not bare and not os.path.exists(os.path.join(outdir,
> ".git")):
> + raise Fatal("output directory is not a git repository")
> + threshold = capture_or_die("git log -1 --format=%ct").strip()
> + backend.set_after(threshold)
> + if revisionmap:
> + backend.set_revmap(tempfile.mkstemp()[1])
> + markmap = tempfile.mkstemp()[1]
> + if arguments:
> + backend.set_module(arguments[0])
> + gitopts = ""
> + if bare:
> + gitopts += " --bare"
> + if revisionmap:
> + gitopts += " --export-marks='%s'" % markmap
> + if authormap:
> + shutil.copyfile(authormap, metadata("cvs_authors"))
> + if os.path.exists(metadata("cvs-authors")):
> + backend.set_authormap(metadata("cvs-authors"))
> + do_or_die("%s | (cd %s >/dev/null; git fast-import --quiet %s)" \
> + % (backend.command(), outdir, gitopts))
outdir needs to be quoted in the formatted string, i.e.:
"%s | (cd '%s' >/dev/null ..."
Also, I noticed the generated cvs-revisions file now maps cvs
revisions to blobs instead of commits. Was this change intentional?
Thanks,
Chris
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