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Diffstat (limited to 'libbe/ui/util/cmdutil.py')
-rw-r--r-- | libbe/ui/util/cmdutil.py | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/libbe/ui/util/cmdutil.py b/libbe/ui/util/cmdutil.py new file mode 100644 index 0000000..c567984 --- /dev/null +++ b/libbe/ui/util/cmdutil.py @@ -0,0 +1,356 @@ +# Copyright (C) 2005-2009 Aaron Bentley and Panometrics, Inc. +# Gianluca Montecchi <gian@grys.it> +# Oleg Romanyshyn <oromanyshyn@panoramicfeedback.com> +# W. Trevor King <wking@drexel.edu> +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +""" +Define assorted utilities to make command-line handling easier. +""" + +import glob +import optparse +import os +from textwrap import TextWrapper +from StringIO import StringIO +import sys + +import libbe +import bugdir +import comment +import plugin +import encoding +if libbe.TESTING == True: + import doctest + + +class UserError(Exception): + def __init__(self, msg): + Exception.__init__(self, msg) + +class UnknownCommand(UserError): + def __init__(self, cmd): + Exception.__init__(self, "Unknown command '%s'" % cmd) + self.cmd = cmd + +class UsageError(Exception): + pass + +class GetHelp(Exception): + pass + +class GetCompletions(Exception): + def __init__(self, completions=[]): + msg = "Get allowed completions" + Exception.__init__(self, msg) + self.completions = completions + +def iter_commands(): + for name, module in plugin.iter_plugins("becommands"): + yield name.replace("_", "-"), module + +def get_command(command_name): + """Retrieves the module for a user command + + >>> try: + ... get_command("asdf") + ... except UnknownCommand, e: + ... print e + Unknown command 'asdf' + >>> repr(get_command("list")).startswith("<module 'becommands.list' from ") + True + """ + cmd = plugin.get_plugin("becommands", command_name.replace("-", "_")) + if cmd is None: + raise UnknownCommand(command_name) + return cmd + + +def execute(cmd, args, + manipulate_encodings=True, restrict_file_access=False, + dir="."): + enc = encoding.get_encoding() + cmd = get_command(cmd) + ret = cmd.execute([a.decode(enc) for a in args], + manipulate_encodings=manipulate_encodings, + restrict_file_access=restrict_file_access, + dir=dir) + if ret == None: + ret = 0 + return ret + +def help(cmd=None, parser=None): + if cmd != None: + return get_command(cmd).help() + else: + cmdlist = [] + for name, module in iter_commands(): + cmdlist.append((name, module.__desc__)) + longest_cmd_len = max([len(name) for name,desc in cmdlist]) + ret = ["Bugs Everywhere - Distributed bug tracking", + "", "Supported commands"] + for name, desc in cmdlist: + numExtraSpaces = longest_cmd_len-len(name) + ret.append("be %s%*s %s" % (name, numExtraSpaces, "", desc)) + ret.extend(["", "Run", " be help [command]", "for more information."]) + longhelp = "\n".join(ret) + if parser == None: + return longhelp + return parser.help_str() + "\n" + longhelp + +def completions(cmd): + parser = get_command(cmd).get_parser() + longopts = [] + for opt in parser.option_list: + longopts.append(opt.get_opt_string()) + return longopts + +def raise_get_help(option, opt, value, parser): + raise GetHelp + +def raise_get_completions(option, opt, value, parser): + print "got completion arg" + if hasattr(parser, "command") and parser.command == "be": + comps = [] + for command, module in iter_commands(): + comps.append(command) + for opt in parser.option_list: + comps.append(opt.get_opt_string()) + raise GetCompletions(comps) + raise GetCompletions(completions(sys.argv[1])) + +class CmdOptionParser(optparse.OptionParser): + def __init__(self, usage): + optparse.OptionParser.__init__(self, usage) + self.disable_interspersed_args() + self.remove_option("-h") + self.add_option("-h", "--help", action="callback", + callback=raise_get_help, help="Print a help message") + self.add_option("--complete", action="callback", + callback=raise_get_completions, + help="Print a list of available completions") + + def error(self, message): + raise UsageError(message) + + def iter_options(self): + return iter_combine([self._short_opt.iterkeys(), + self._long_opt.iterkeys()]) + + def help_str(self): + f = StringIO() + self.print_help(f) + return f.getvalue() + +def option_value_pairs(options, parser): + """ + Iterate through OptionParser (option, value) pairs. + """ + for option in [o.dest for o in parser.option_list if o.dest != None]: + value = getattr(options, option) + yield (option, value) + +def default_complete(options, args, parser, bugid_args={}): + """ + A dud complete implementation for becommands so that the + --complete argument doesn't cause any problems. Use this + until you've set up a command-specific complete function. + + bugid_args is an optional dict where the keys are positional + arguments taking bug shortnames and the values are functions for + filtering, since that's a common enough operation. + e.g. for "be open [options] BUGID" + bugid_args = {0: lambda bug : bug.active == False} + A positional argument of -1 specifies all remaining arguments + (e.g in the case of "be show BUGID BUGID ..."). + """ + for option,value in option_value_pairs(options, parser): + if value == "--complete": + raise GetCompletions() + if len(bugid_args.keys()) > 0: + max_pos_arg = max(bugid_args.keys()) + else: + max_pos_arg = -1 + for pos,value in enumerate(args): + if value == "--complete": + filter = None + if pos in bugid_args: + filter = bugid_args[pos] + if pos > max_pos_arg and -1 in bugid_args: + filter = bugid_args[-1] + if filter != None: + bugshortnames = [] + try: + bd = bugdir.BugDir(from_disk=True, + manipulate_encodings=False) + bd.load_all_bugs() + bugs = [bug for bug in bd if filter(bug) == True] + bugshortnames = [bd.bug_shortname(bug) for bug in bugs] + except bugdir.NoBugDir: + pass + raise GetCompletions(bugshortnames) + raise GetCompletions() + +def complete_path(path): + """List possible path completions for path.""" + comps = glob.glob(path+"*") + glob.glob(path+"/*") + if len(comps) == 1 and os.path.isdir(comps[0]): + comps.extend(glob.glob(comps[0]+"/*")) + return comps + +def underlined(instring): + """Produces a version of a string that is underlined with '=' + + >>> underlined("Underlined String") + 'Underlined String\\n=================' + """ + + return "%s\n%s" % (instring, "="*len(instring)) + +def select_values(string, possible_values, name="unkown"): + """ + This function allows the user to select values from a list of + possible values. The default is to select all the values: + + >>> select_values(None, ['abc', 'def', 'hij']) + ['abc', 'def', 'hij'] + + The user selects values with a comma-separated limit_string. + Prepending a minus sign to such a list denotes blacklist mode: + + >>> select_values('-abc,hij', ['abc', 'def', 'hij']) + ['def'] + + Without the leading -, the selection is in whitelist mode: + + >>> select_values('abc,hij', ['abc', 'def', 'hij']) + ['abc', 'hij'] + + In either case, appropriate errors are raised if on of the + user-values is not in the list of possible values. The name + parameter lets you make the error message more clear: + + >>> select_values('-xyz,hij', ['abc', 'def', 'hij'], name="foobar") + Traceback (most recent call last): + ... + UserError: Invalid foobar xyz + ['abc', 'def', 'hij'] + >>> select_values('xyz,hij', ['abc', 'def', 'hij'], name="foobar") + Traceback (most recent call last): + ... + UserError: Invalid foobar xyz + ['abc', 'def', 'hij'] + """ + possible_values = list(possible_values) # don't alter the original + if string == None: + pass + elif string.startswith('-'): + blacklisted_values = set(string[1:].split(',')) + for value in blacklisted_values: + if value not in possible_values: + raise UserError('Invalid %s %s\n %s' + % (name, value, possible_values)) + possible_values.remove(value) + else: + whitelisted_values = string.split(',') + for value in whitelisted_values: + if value not in possible_values: + raise UserError('Invalid %s %s\n %s' + % (name, value, possible_values)) + possible_values = whitelisted_values + return possible_values + +def restrict_file_access(bugdir, path): + """ + Check that the file at path is inside bugdir.root. This is + important if you allow other users to execute becommands with your + username (e.g. if you're running be-handle-mail through your + ~/.procmailrc). If this check wasn't made, a user could e.g. + run + be commit -b ~/.ssh/id_rsa "Hack to expose ssh key" + which would expose your ssh key to anyone who could read the VCS + log. + """ + in_root = bugdir.vcs.path_in_root(path, bugdir.root) + if in_root == False: + raise UserError('file access restricted!\n %s not in %s' + % (path, bugdir.root)) + +def parse_id(id): + """ + Return (bug_id, comment_id) tuple. + Basically inverts Comment.comment_shortnames() + >>> parse_id('XYZ') + ('XYZ', None) + >>> parse_id('XYZ:123') + ('XYZ', ':123') + >>> parse_id('') + Traceback (most recent call last): + ... + UserError: invalid id ''. + >>> parse_id('::') + Traceback (most recent call last): + ... + UserError: invalid id '::'. + """ + if len(id) == 0: + raise UserError("invalid id '%s'." % id) + if id.count(':') > 1: + raise UserError("invalid id '%s'." % id) + elif id.count(':') == 1: + # Split shortname generated by Comment.comment_shortnames() + bug_id,comment_id = id.split(':') + comment_id = ':'+comment_id + else: + bug_id = id + comment_id = None + return (bug_id, comment_id) + +def bug_from_id(bdir, id): + """ + Exception translation for the command-line interface. + id can be either the bug shortname or the full uuid. + """ + try: + bug = bdir.bug_from_shortname(id) + except (bugdir.MultipleBugMatches, bugdir.NoBugMatches), e: + raise UserError(e.message) + return bug + +def bug_comment_from_id(bdir, id): + """ + Return (bug,comment) tuple matching shortname. id can be either + the bug/comment shortname or the full uuid. If there is no + comment part to the id, the returned comment is the bug's + .comment_root. + """ + bug_id,comment_id = parse_id(id) + try: + bug = bdir.bug_from_shortname(bug_id) + except (bugdir.MultipleBugMatches, bugdir.NoBugMatches), e: + raise UserError(e.message) + if comment_id == None: + comm = bug.comment_root + else: + #bug.load_comments(load_full=False) + try: + comm = bug.comment_root.comment_from_shortname(comment_id) + except comment.InvalidShortname, e: + raise UserError(e.message) + return (bug, comm) + +if libbe.TESTING == True: + suite = doctest.DocTestSuite() |