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-rwxr-xr-xcontrib/hooks/multimail/migrate-mailhook-config269
1 files changed, 269 insertions, 0 deletions
diff --git a/contrib/hooks/multimail/migrate-mailhook-config b/contrib/hooks/multimail/migrate-mailhook-config
new file mode 100755
index 0000000000..04eeaac413
--- /dev/null
+++ b/contrib/hooks/multimail/migrate-mailhook-config
@@ -0,0 +1,269 @@
+#! /usr/bin/env python2
+
+"""Migrate a post-receive-email configuration to be usable with git_multimail.py.
+
+See README.migrate-from-post-receive-email for more information.
+
+"""
+
+import sys
+import optparse
+
+from git_multimail import CommandError
+from git_multimail import Config
+from git_multimail import read_output
+
+
+OLD_NAMES = [
+ 'mailinglist',
+ 'announcelist',
+ 'envelopesender',
+ 'emailprefix',
+ 'showrev',
+ 'emailmaxlines',
+ 'diffopts',
+ ]
+
+NEW_NAMES = [
+ 'environment',
+ 'reponame',
+ 'mailinglist',
+ 'refchangelist',
+ 'commitlist',
+ 'announcelist',
+ 'announceshortlog',
+ 'envelopesender',
+ 'administrator',
+ 'emailprefix',
+ 'emailmaxlines',
+ 'diffopts',
+ 'emaildomain',
+ ]
+
+
+INFO = """\
+
+SUCCESS!
+
+Your post-receive-email configuration has been converted to
+git-multimail format. Please see README and
+README.migrate-from-post-receive-email to learn about other
+git-multimail configuration possibilities.
+
+For example, git-multimail has the following new options with no
+equivalent in post-receive-email. You might want to read about them
+to see if they would be useful in your situation:
+
+"""
+
+
+def _check_old_config_exists(old):
+ """Check that at least one old configuration value is set."""
+
+ for name in OLD_NAMES:
+ if old.has_key(name):
+ return True
+
+ return False
+
+
+def _check_new_config_clear(new):
+ """Check that none of the new configuration names are set."""
+
+ retval = True
+ for name in NEW_NAMES:
+ if new.has_key(name):
+ if retval:
+ sys.stderr.write('INFO: The following configuration values already exist:\n\n')
+ sys.stderr.write(' "%s.%s"\n' % (new.section, name))
+ retval = False
+
+ return retval
+
+
+def erase_values(config, names):
+ for name in names:
+ if config.has_key(name):
+ try:
+ sys.stderr.write('...unsetting "%s.%s"\n' % (config.section, name))
+ config.unset_all(name)
+ except CommandError:
+ sys.stderr.write(
+ '\nWARNING: could not unset "%s.%s". '
+ 'Perhaps it is not set at the --local level?\n\n'
+ % (config.section, name)
+ )
+
+
+def is_section_empty(section, local):
+ """Return True iff the specified configuration section is empty.
+
+ Iff local is True, use the --local option when invoking 'git
+ config'."""
+
+ if local:
+ local_option = ['--local']
+ else:
+ local_option = []
+
+ try:
+ read_output(
+ ['git', 'config']
+ + local_option
+ + ['--get-regexp', '^%s\.' % (section,)]
+ )
+ except CommandError, e:
+ if e.retcode == 1:
+ # This means that no settings were found.
+ return True
+ else:
+ raise
+ else:
+ return False
+
+
+def remove_section_if_empty(section):
+ """If the specified configuration section is empty, delete it."""
+
+ try:
+ empty = is_section_empty(section, local=True)
+ except CommandError:
+ # Older versions of git do not support the --local option, so
+ # if the first attempt fails, try without --local.
+ try:
+ empty = is_section_empty(section, local=False)
+ except CommandError:
+ sys.stderr.write(
+ '\nINFO: If configuration section "%s.*" is empty, you might want '
+ 'to delete it.\n\n'
+ % (section,)
+ )
+ return
+
+ if empty:
+ sys.stderr.write('...removing section "%s.*"\n' % (section,))
+ read_output(['git', 'config', '--remove-section', section])
+ else:
+ sys.stderr.write(
+ '\nINFO: Configuration section "%s.*" still has contents. '
+ 'It will not be deleted.\n\n'
+ % (section,)
+ )
+
+
+def migrate_config(strict=False, retain=False, overwrite=False):
+ old = Config('hooks')
+ new = Config('multimailhook')
+ if not _check_old_config_exists(old):
+ sys.exit(
+ 'Your repository has no post-receive-email configuration. '
+ 'Nothing to do.'
+ )
+ if not _check_new_config_clear(new):
+ if overwrite:
+ sys.stderr.write('\nWARNING: Erasing the above values...\n\n')
+ erase_values(new, NEW_NAMES)
+ else:
+ sys.exit(
+ '\nERROR: Refusing to overwrite existing values. Use the --overwrite\n'
+ 'option to continue anyway.'
+ )
+
+ name = 'showrev'
+ if old.has_key(name):
+ msg = 'git-multimail does not support "%s.%s"' % (old.section, name,)
+ if strict:
+ sys.exit(
+ 'ERROR: %s.\n'
+ 'Please unset that value then try again, or run without --strict.'
+ % (msg,)
+ )
+ else:
+ sys.stderr.write('\nWARNING: %s (ignoring).\n\n' % (msg,))
+
+ for name in ['mailinglist', 'announcelist']:
+ if old.has_key(name):
+ sys.stderr.write(
+ '...copying "%s.%s" to "%s.%s"\n' % (old.section, name, new.section, name)
+ )
+ new.set_recipients(name, old.get_recipients(name))
+
+ if strict:
+ sys.stderr.write(
+ '...setting "%s.commitlist" to the empty string\n' % (new.section,)
+ )
+ new.set_recipients('commitlist', '')
+ sys.stderr.write(
+ '...setting "%s.announceshortlog" to "true"\n' % (new.section,)
+ )
+ new.set('announceshortlog', 'true')
+
+ for name in ['envelopesender', 'emailmaxlines', 'diffopts']:
+ if old.has_key(name):
+ sys.stderr.write(
+ '...copying "%s.%s" to "%s.%s"\n' % (old.section, name, new.section, name)
+ )
+ new.set(name, old.get(name))
+
+ name = 'emailprefix'
+ if old.has_key(name):
+ sys.stderr.write(
+ '...copying "%s.%s" to "%s.%s"\n' % (old.section, name, new.section, name)
+ )
+ new.set(name, old.get(name))
+ elif strict:
+ sys.stderr.write(
+ '...setting "%s.%s" to "[SCM]" to preserve old subject lines\n'
+ % (new.section, name)
+ )
+ new.set(name, '[SCM]')
+
+ if not retain:
+ erase_values(old, OLD_NAMES)
+ remove_section_if_empty(old.section)
+
+ sys.stderr.write(INFO)
+ for name in NEW_NAMES:
+ if name not in OLD_NAMES:
+ sys.stderr.write(' "%s.%s"\n' % (new.section, name,))
+ sys.stderr.write('\n')
+
+
+def main(args):
+ parser = optparse.OptionParser(
+ description=__doc__,
+ usage='%prog [OPTIONS]',
+ )
+
+ parser.add_option(
+ '--strict', action='store_true', default=False,
+ help=(
+ 'Slavishly configure git-multimail as closely as possible to '
+ 'the post-receive-email configuration. Default is to turn '
+ 'on some new features that have no equivalent in post-receive-email.'
+ ),
+ )
+ parser.add_option(
+ '--retain', action='store_true', default=False,
+ help=(
+ 'Retain the post-receive-email configuration values. '
+ 'Default is to delete them after the new values are set.'
+ ),
+ )
+ parser.add_option(
+ '--overwrite', action='store_true', default=False,
+ help=(
+ 'Overwrite any existing git-multimail configuration settings. '
+ 'Default is to abort if such settings already exist.'
+ ),
+ )
+
+ (options, args) = parser.parse_args(args)
+
+ if args:
+ parser.error('Unexpected arguments: %s' % (' '.join(args),))
+
+ migrate_config(strict=options.strict, retain=options.retain, overwrite=options.overwrite)
+
+
+main(sys.argv[1:])