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authorEd Bartosh <ed.bartosh@linux.intel.com>2015-09-02 13:58:11 +0300
committerRichard Purdie <richard.purdie@linuxfoundation.org>2015-09-03 12:43:28 +0100
commite85f807b874a3e2a576e631fbc82767af00603ed (patch)
treec774bd6da1900887f0948f859e33363ef1a3146c /scripts
parentf1bcf47ff4cf90e14e557587f22a169cad8783f7 (diff)
downloadpoky-e85f807b874a3e2a576e631fbc82767af00603ed.tar.gz
wic: use optparse instead of cmdln
cmdln.py https://pypi.python.org/pypi/cmdln was used in creator.py to parse image plugin options and arguments. There is no need in such a sofisticated API to do this simple task. Standard option parser optparse.OptionParser can do it just fine. Modified Creator class to work with option parser. Removed cmdln.py from the wic codebase. (From OE-Core rev: 1e5220f74830b99cf8340a4f6977399b5cf49871) Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/lib/wic/creator.py115
-rw-r--r--scripts/lib/wic/plugins/imager/direct_plugin.py2
-rw-r--r--scripts/lib/wic/utils/cmdln.py1604
3 files changed, 27 insertions, 1694 deletions
diff --git a/scripts/lib/wic/creator.py b/scripts/lib/wic/creator.py
index 760848f320..5231297282 100644
--- a/scripts/lib/wic/creator.py
+++ b/scripts/lib/wic/creator.py
@@ -16,15 +16,15 @@
16# Temple Place - Suite 330, Boston, MA 02111-1307, USA. 16# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 17
18import os, sys 18import os, sys
19from optparse import SUPPRESS_HELP 19from optparse import OptionParser, SUPPRESS_HELP
20 20
21from wic import msger 21from wic import msger
22from wic.utils import cmdln, errors 22from wic.utils import errors
23from wic.conf import configmgr 23from wic.conf import configmgr
24from wic.plugin import pluginmgr 24from wic.plugin import pluginmgr
25 25
26 26
27class Creator(cmdln.Cmdln): 27class Creator(object):
28 """${name}: create an image 28 """${name}: create an image
29 29
30 Usage: 30 Usage:
@@ -37,8 +37,7 @@ class Creator(cmdln.Cmdln):
37 name = 'wic create(cr)' 37 name = 'wic create(cr)'
38 38
39 def __init__(self, *args, **kwargs): 39 def __init__(self, *args, **kwargs):
40 cmdln.Cmdln.__init__(self, *args, **kwargs) 40 self._subcmds = {}
41 self._subcmds = []
42 41
43 # get cmds from pluginmgr 42 # get cmds from pluginmgr
44 # mix-in do_subcmd interface 43 # mix-in do_subcmd interface
@@ -48,11 +47,10 @@ class Creator(cmdln.Cmdln):
48 continue 47 continue
49 48
50 func = getattr(klass, 'do_create') 49 func = getattr(klass, 'do_create')
51 setattr(self.__class__, "do_"+subcmd, func) 50 self._subcmds[subcmd] = func
52 self._subcmds.append(subcmd)
53 51
54 def get_optparser(self): 52 def get_optparser(self):
55 optparser = cmdln.CmdlnOptionParser(self) 53 optparser = OptionParser()
56 optparser.add_option('-d', '--debug', action='store_true', 54 optparser.add_option('-d', '--debug', action='store_true',
57 dest='debug', 55 dest='debug',
58 help=SUPPRESS_HELP) 56 help=SUPPRESS_HELP)
@@ -73,69 +71,31 @@ class Creator(cmdln.Cmdln):
73 ' feature, use it if you have more than 4G memory') 71 ' feature, use it if you have more than 4G memory')
74 return optparser 72 return optparser
75 73
76 def preoptparse(self, argv): 74 def postoptparse(self, options):
77 optparser = self.get_optparser()
78
79 largs = []
80 rargs = []
81 while argv:
82 arg = argv.pop(0)
83
84 if arg in ('-h', '--help'):
85 rargs.append(arg)
86
87 elif optparser.has_option(arg):
88 largs.append(arg)
89
90 if optparser.get_option(arg).takes_value():
91 try:
92 largs.append(argv.pop(0))
93 except IndexError:
94 raise errors.Usage("option %s requires arguments" % arg)
95
96 else:
97 if arg.startswith("--"):
98 if "=" in arg:
99 opt = arg.split("=")[0]
100 else:
101 opt = None
102 elif arg.startswith("-") and len(arg) > 2:
103 opt = arg[0:2]
104 else:
105 opt = None
106
107 if opt and optparser.has_option(opt):
108 largs.append(arg)
109 else:
110 rargs.append(arg)
111
112 return largs + rargs
113
114 def postoptparse(self):
115 abspath = lambda pth: os.path.abspath(os.path.expanduser(pth)) 75 abspath = lambda pth: os.path.abspath(os.path.expanduser(pth))
116 76
117 if self.options.verbose: 77 if options.verbose:
118 msger.set_loglevel('verbose') 78 msger.set_loglevel('verbose')
119 if self.options.debug: 79 if options.debug:
120 msger.set_loglevel('debug') 80 msger.set_loglevel('debug')
121 81
122 if self.options.logfile: 82 if options.logfile:
123 logfile_abs_path = abspath(self.options.logfile) 83 logfile_abs_path = abspath(options.logfile)
124 if os.path.isdir(logfile_abs_path): 84 if os.path.isdir(logfile_abs_path):
125 raise errors.Usage("logfile's path %s should be file" 85 raise errors.Usage("logfile's path %s should be file"
126 % self.options.logfile) 86 % options.logfile)
127 if not os.path.exists(os.path.dirname(logfile_abs_path)): 87 if not os.path.exists(os.path.dirname(logfile_abs_path)):
128 os.makedirs(os.path.dirname(logfile_abs_path)) 88 os.makedirs(os.path.dirname(logfile_abs_path))
129 msger.set_interactive(False) 89 msger.set_interactive(False)
130 msger.set_logfile(logfile_abs_path) 90 msger.set_logfile(logfile_abs_path)
131 configmgr.create['logfile'] = self.options.logfile 91 configmgr.create['logfile'] = options.logfile
132 92
133 if self.options.config: 93 if options.config:
134 configmgr.reset() 94 configmgr.reset()
135 configmgr._siteconf = self.options.config 95 configmgr._siteconf = options.config
136 96
137 if self.options.outdir is not None: 97 if options.outdir is not None:
138 configmgr.create['outdir'] = abspath(self.options.outdir) 98 configmgr.create['outdir'] = abspath(options.outdir)
139 99
140 cdir = 'outdir' 100 cdir = 'outdir'
141 if os.path.exists(configmgr.create[cdir]) \ 101 if os.path.exists(configmgr.create[cdir]) \
@@ -143,8 +103,8 @@ class Creator(cmdln.Cmdln):
143 msger.error('Invalid directory specified: %s' \ 103 msger.error('Invalid directory specified: %s' \
144 % configmgr.create[cdir]) 104 % configmgr.create[cdir])
145 105
146 if self.options.enabletmpfs: 106 if options.enabletmpfs:
147 configmgr.create['enabletmpfs'] = self.options.enabletmpfs 107 configmgr.create['enabletmpfs'] = options.enabletmpfs
148 108
149 def main(self, argv=None): 109 def main(self, argv=None):
150 if argv is None: 110 if argv is None:
@@ -152,36 +112,13 @@ class Creator(cmdln.Cmdln):
152 else: 112 else:
153 argv = argv[:] # don't modify caller's list 113 argv = argv[:] # don't modify caller's list
154 114
155 self.optparser = self.get_optparser() 115 pname = argv[0]
156 if self.optparser: 116 if pname not in self._subcmds:
157 try: 117 msger.error('Unknown plugin: %s' % pname)
158 argv = self.preoptparse(argv)
159 self.options, args = self.optparser.parse_args(argv)
160
161 except cmdln.CmdlnUserError, ex:
162 msg = "%s: %s\nTry '%s help' for info.\n"\
163 % (self.name, ex, self.name)
164 msger.error(msg)
165
166 except cmdln.StopOptionProcessing, ex:
167 return 0
168 else:
169 # optparser=None means no process for opts
170 self.options, args = None, argv[1:]
171
172 if not args:
173 return self.emptyline()
174
175 self.postoptparse()
176
177 return self.cmd(args)
178 118
179 def precmd(self, argv): # check help before cmd 119 optparser = self.get_optparser()
180 120 options, args = optparser.parse_args(argv)
181 if '-h' in argv or '?' in argv or '--help' in argv or 'help' in argv:
182 return argv
183 121
184 if len(argv) == 1: 122 self.postoptparse(options)
185 return ['help', argv[0]]
186 123
187 return argv 124 return self._subcmds[pname](options, *args[1:])
diff --git a/scripts/lib/wic/plugins/imager/direct_plugin.py b/scripts/lib/wic/plugins/imager/direct_plugin.py
index eb17e8d7b7..e9672fe274 100644
--- a/scripts/lib/wic/plugins/imager/direct_plugin.py
+++ b/scripts/lib/wic/plugins/imager/direct_plugin.py
@@ -56,7 +56,7 @@ class DirectPlugin(ImagerPlugin):
56 return krootfs_dir 56 return krootfs_dir
57 57
58 @classmethod 58 @classmethod
59 def do_create(cls, subcmd, opts, *args): 59 def do_create(cls, opts, *args):
60 """ 60 """
61 Create direct image, called from creator as 'direct' cmd 61 Create direct image, called from creator as 'direct' cmd
62 """ 62 """
diff --git a/scripts/lib/wic/utils/cmdln.py b/scripts/lib/wic/utils/cmdln.py
deleted file mode 100644
index 47654b934f..0000000000
--- a/scripts/lib/wic/utils/cmdln.py
+++ /dev/null
@@ -1,1604 +0,0 @@
1#!/usr/bin/env python
2# Copyright (c) 2002-2007 ActiveState Software Inc.
3# License: MIT (see LICENSE.txt for license details)
4# Author: Trent Mick
5# Home: http://trentm.com/projects/cmdln/
6
7"""An improvement on Python's standard cmd.py module.
8
9As with cmd.py, this module provides "a simple framework for writing
10line-oriented command intepreters." This module provides a 'RawCmdln'
11class that fixes some design flaws in cmd.Cmd, making it more scalable
12and nicer to use for good 'cvs'- or 'svn'-style command line interfaces
13or simple shells. And it provides a 'Cmdln' class that add
14optparse-based option processing. Basically you use it like this:
15
16 import cmdln
17
18 class MySVN(cmdln.Cmdln):
19 name = "svn"
20
21 @cmdln.alias('stat', 'st')
22 @cmdln.option('-v', '--verbose', action='store_true'
23 help='print verbose information')
24 def do_status(self, subcmd, opts, *paths):
25 print "handle 'svn status' command"
26
27 #...
28
29 if __name__ == "__main__":
30 shell = MySVN()
31 retval = shell.main()
32 sys.exit(retval)
33
34See the README.txt or <http://trentm.com/projects/cmdln/> for more
35details.
36"""
37
38__version_info__ = (1, 1, 2)
39__version__ = '.'.join(map(str, __version_info__))
40
41import os
42import sys
43import re
44import cmd
45import optparse
46import sys
47
48
49
50
51#---- globals
52
53LOOP_ALWAYS, LOOP_NEVER, LOOP_IF_EMPTY = range(3)
54
55# An unspecified optional argument when None is a meaningful value.
56_NOT_SPECIFIED = ("Not", "Specified")
57
58# Pattern to match a TypeError message from a call that
59# failed because of incorrect number of arguments (see
60# Python/getargs.c).
61_INCORRECT_NUM_ARGS_RE = re.compile(
62 r"(takes [\w ]+ )(\d+)( arguments? \()(\d+)( given\))")
63
64
65
66#---- exceptions
67
68class CmdlnError(Exception):
69 """A cmdln.py usage error."""
70 def __init__(self, msg):
71 self.msg = msg
72 def __str__(self):
73 return self.msg
74
75class CmdlnUserError(Exception):
76 """An error by a user of a cmdln-based tool/shell."""
77 pass
78
79
80
81#---- public methods and classes
82
83def alias(*aliases):
84 """Decorator to add aliases for Cmdln.do_* command handlers.
85
86 Example:
87 class MyShell(cmdln.Cmdln):
88 @cmdln.alias("!", "sh")
89 def do_shell(self, argv):
90 #...implement 'shell' command
91 """
92 def decorate(f):
93 if not hasattr(f, "aliases"):
94 f.aliases = []
95 f.aliases += aliases
96 return f
97 return decorate
98
99
100class RawCmdln(cmd.Cmd):
101 """An improved (on cmd.Cmd) framework for building multi-subcommand
102 scripts (think "svn" & "cvs") and simple shells (think "pdb" and
103 "gdb").
104
105 A simple example:
106
107 import cmdln
108
109 class MySVN(cmdln.RawCmdln):
110 name = "svn"
111
112 @cmdln.aliases('stat', 'st')
113 def do_status(self, argv):
114 print "handle 'svn status' command"
115
116 if __name__ == "__main__":
117 shell = MySVN()
118 retval = shell.main()
119 sys.exit(retval)
120
121 See <http://trentm.com/projects/cmdln> for more information.
122 """
123 name = None # if unset, defaults basename(sys.argv[0])
124 prompt = None # if unset, defaults to self.name+"> "
125 version = None # if set, default top-level options include --version
126
127 # Default messages for some 'help' command error cases.
128 # They are interpolated with one arg: the command.
129 nohelp = "no help on '%s'"
130 unknowncmd = "unknown command: '%s'"
131
132 helpindent = '' # string with which to indent help output
133
134 def __init__(self, completekey='tab',
135 stdin=None, stdout=None, stderr=None):
136 """Cmdln(completekey='tab', stdin=None, stdout=None, stderr=None)
137
138 The optional argument 'completekey' is the readline name of a
139 completion key; it defaults to the Tab key. If completekey is
140 not None and the readline module is available, command completion
141 is done automatically.
142
143 The optional arguments 'stdin', 'stdout' and 'stderr' specify
144 alternate input, output and error output file objects; if not
145 specified, sys.* are used.
146
147 If 'stdout' but not 'stderr' is specified, stdout is used for
148 error output. This is to provide least surprise for users used
149 to only the 'stdin' and 'stdout' options with cmd.Cmd.
150 """
151 import sys
152 if self.name is None:
153 self.name = os.path.basename(sys.argv[0])
154 if self.prompt is None:
155 self.prompt = self.name+"> "
156 self._name_str = self._str(self.name)
157 self._prompt_str = self._str(self.prompt)
158 if stdin is not None:
159 self.stdin = stdin
160 else:
161 self.stdin = sys.stdin
162 if stdout is not None:
163 self.stdout = stdout
164 else:
165 self.stdout = sys.stdout
166 if stderr is not None:
167 self.stderr = stderr
168 elif stdout is not None:
169 self.stderr = stdout
170 else:
171 self.stderr = sys.stderr
172 self.cmdqueue = []
173 self.completekey = completekey
174 self.cmdlooping = False
175
176 def get_optparser(self):
177 """Hook for subclasses to set the option parser for the
178 top-level command/shell.
179
180 This option parser is used retrieved and used by `.main()' to
181 handle top-level options.
182
183 The default implements a single '-h|--help' option. Sub-classes
184 can return None to have no options at the top-level. Typically
185 an instance of CmdlnOptionParser should be returned.
186 """
187 version = (self.version is not None
188 and "%s %s" % (self._name_str, self.version)
189 or None)
190 return CmdlnOptionParser(self, version=version)
191
192 def postoptparse(self):
193 """Hook method executed just after `.main()' parses top-level
194 options.
195
196 When called `self.options' holds the results of the option parse.
197 """
198 pass
199
200 def main(self, argv=None, loop=LOOP_NEVER):
201 """A possible mainline handler for a script, like so:
202
203 import cmdln
204 class MyCmd(cmdln.Cmdln):
205 name = "mycmd"
206 ...
207
208 if __name__ == "__main__":
209 MyCmd().main()
210
211 By default this will use sys.argv to issue a single command to
212 'MyCmd', then exit. The 'loop' argument can be use to control
213 interactive shell behaviour.
214
215 Arguments:
216 "argv" (optional, default sys.argv) is the command to run.
217 It must be a sequence, where the first element is the
218 command name and subsequent elements the args for that
219 command.
220 "loop" (optional, default LOOP_NEVER) is a constant
221 indicating if a command loop should be started (i.e. an
222 interactive shell). Valid values (constants on this module):
223 LOOP_ALWAYS start loop and run "argv", if any
224 LOOP_NEVER run "argv" (or .emptyline()) and exit
225 LOOP_IF_EMPTY run "argv", if given, and exit;
226 otherwise, start loop
227 """
228 if argv is None:
229 import sys
230 argv = sys.argv
231 else:
232 argv = argv[:] # don't modify caller's list
233
234 self.optparser = self.get_optparser()
235 if self.optparser: # i.e. optparser=None means don't process for opts
236 try:
237 self.options, args = self.optparser.parse_args(argv[1:])
238 except CmdlnUserError, ex:
239 msg = "%s: %s\nTry '%s help' for info.\n"\
240 % (self.name, ex, self.name)
241 self.stderr.write(self._str(msg))
242 self.stderr.flush()
243 return 1
244 except StopOptionProcessing, ex:
245 return 0
246 else:
247 self.options, args = None, argv[1:]
248 self.postoptparse()
249
250 if loop == LOOP_ALWAYS:
251 if args:
252 self.cmdqueue.append(args)
253 return self.cmdloop()
254 elif loop == LOOP_NEVER:
255 if args:
256 return self.cmd(args)
257 else:
258 return self.emptyline()
259 elif loop == LOOP_IF_EMPTY:
260 if args:
261 return self.cmd(args)
262 else:
263 return self.cmdloop()
264
265 def cmd(self, argv):
266 """Run one command and exit.
267
268 "argv" is the arglist for the command to run. argv[0] is the
269 command to run. If argv is an empty list then the
270 'emptyline' handler is run.
271
272 Returns the return value from the command handler.
273 """
274 assert isinstance(argv, (list, tuple)), \
275 "'argv' is not a sequence: %r" % argv
276 retval = None
277 try:
278 argv = self.precmd(argv)
279 retval = self.onecmd(argv)
280 self.postcmd(argv)
281 except:
282 if not self.cmdexc(argv):
283 raise
284 retval = 1
285 return retval
286
287 def _str(self, s):
288 """Safely convert the given str/unicode to a string for printing."""
289 try:
290 return str(s)
291 except UnicodeError:
292 #XXX What is the proper encoding to use here? 'utf-8' seems
293 # to work better than "getdefaultencoding" (usually
294 # 'ascii'), on OS X at least.
295 #import sys
296 #return s.encode(sys.getdefaultencoding(), "replace")
297 return s.encode("utf-8", "replace")
298
299 def cmdloop(self, intro=None):
300 """Repeatedly issue a prompt, accept input, parse into an argv, and
301 dispatch (via .precmd(), .onecmd() and .postcmd()), passing them
302 the argv. In other words, start a shell.
303
304 "intro" (optional) is a introductory message to print when
305 starting the command loop. This overrides the class
306 "intro" attribute, if any.
307 """
308 self.cmdlooping = True
309 self.preloop()
310 if self.use_rawinput and self.completekey:
311 try:
312 import readline
313 self.old_completer = readline.get_completer()
314 readline.set_completer(self.complete)
315 readline.parse_and_bind(self.completekey+": complete")
316 except ImportError:
317 pass
318 try:
319 if intro is None:
320 intro = self.intro
321 if intro:
322 intro_str = self._str(intro)
323 self.stdout.write(intro_str+'\n')
324 self.stop = False
325 retval = None
326 while not self.stop:
327 if self.cmdqueue:
328 argv = self.cmdqueue.pop(0)
329 assert isinstance(argv, (list, tuple)), \
330 "item on 'cmdqueue' is not a sequence: %r" % argv
331 else:
332 if self.use_rawinput:
333 try:
334 line = raw_input(self._prompt_str)
335 except EOFError:
336 line = 'EOF'
337 else:
338 self.stdout.write(self._prompt_str)
339 self.stdout.flush()
340 line = self.stdin.readline()
341 if not len(line):
342 line = 'EOF'
343 else:
344 line = line[:-1] # chop '\n'
345 argv = line2argv(line)
346 try:
347 argv = self.precmd(argv)
348 retval = self.onecmd(argv)
349 self.postcmd(argv)
350 except:
351 if not self.cmdexc(argv):
352 raise
353 retval = 1
354 self.lastretval = retval
355 self.postloop()
356 finally:
357 if self.use_rawinput and self.completekey:
358 try:
359 import readline
360 readline.set_completer(self.old_completer)
361 except ImportError:
362 pass
363 self.cmdlooping = False
364 return retval
365
366 def precmd(self, argv):
367 """Hook method executed just before the command argv is
368 interpreted, but after the input prompt is generated and issued.
369
370 "argv" is the cmd to run.
371
372 Returns an argv to run (i.e. this method can modify the command
373 to run).
374 """
375 return argv
376
377 def postcmd(self, argv):
378 """Hook method executed just after a command dispatch is finished.
379
380 "argv" is the command that was run.
381 """
382 pass
383
384 def cmdexc(self, argv):
385 """Called if an exception is raised in any of precmd(), onecmd(),
386 or postcmd(). If True is returned, the exception is deemed to have
387 been dealt with. Otherwise, the exception is re-raised.
388
389 The default implementation handles CmdlnUserError's, which
390 typically correspond to user error in calling commands (as
391 opposed to programmer error in the design of the script using
392 cmdln.py).
393 """
394 import sys
395 type, exc, traceback = sys.exc_info()
396 if isinstance(exc, CmdlnUserError):
397 msg = "%s %s: %s\nTry '%s help %s' for info.\n"\
398 % (self.name, argv[0], exc, self.name, argv[0])
399 self.stderr.write(self._str(msg))
400 self.stderr.flush()
401 return True
402
403 def onecmd(self, argv):
404 if not argv:
405 return self.emptyline()
406 self.lastcmd = argv
407 cmdname = self._get_canonical_cmd_name(argv[0])
408 if cmdname:
409 handler = self._get_cmd_handler(cmdname)
410 if handler:
411 return self._dispatch_cmd(handler, argv)
412 return self.default(argv)
413
414 def _dispatch_cmd(self, handler, argv):
415 return handler(argv)
416
417 def default(self, argv):
418 """Hook called to handle a command for which there is no handler.
419
420 "argv" is the command and arguments to run.
421
422 The default implementation writes and error message to stderr
423 and returns an error exit status.
424
425 Returns a numeric command exit status.
426 """
427 errmsg = self._str(self.unknowncmd % (argv[0],))
428 if self.cmdlooping:
429 self.stderr.write(errmsg+"\n")
430 else:
431 self.stderr.write("%s: %s\nTry '%s help' for info.\n"
432 % (self._name_str, errmsg, self._name_str))
433 self.stderr.flush()
434 return 1
435
436 def parseline(self, line):
437 # This is used by Cmd.complete (readline completer function) to
438 # massage the current line buffer before completion processing.
439 # We override to drop special '!' handling.
440 line = line.strip()
441 if not line:
442 return None, None, line
443 elif line[0] == '?':
444 line = 'help ' + line[1:]
445 i, n = 0, len(line)
446 while i < n and line[i] in self.identchars:
447 i = i+1
448 cmd, arg = line[:i], line[i:].strip()
449 return cmd, arg, line
450
451 def helpdefault(self, cmd, known):
452 """Hook called to handle help on a command for which there is no
453 help handler.
454
455 "cmd" is the command name on which help was requested.
456 "known" is a boolean indicating if this command is known
457 (i.e. if there is a handler for it).
458
459 Returns a return code.
460 """
461 if known:
462 msg = self._str(self.nohelp % (cmd,))
463 if self.cmdlooping:
464 self.stderr.write(msg + '\n')
465 else:
466 self.stderr.write("%s: %s\n" % (self.name, msg))
467 else:
468 msg = self.unknowncmd % (cmd,)
469 if self.cmdlooping:
470 self.stderr.write(msg + '\n')
471 else:
472 self.stderr.write("%s: %s\n"
473 "Try '%s help' for info.\n"
474 % (self.name, msg, self.name))
475 self.stderr.flush()
476 return 1
477
478 def do_help(self, argv):
479 """${cmd_name}: give detailed help on a specific sub-command
480
481 Usage:
482 ${name} help [COMMAND]
483 """
484 if len(argv) > 1: # asking for help on a particular command
485 doc = None
486 cmdname = self._get_canonical_cmd_name(argv[1]) or argv[1]
487 if not cmdname:
488 return self.helpdefault(argv[1], False)
489 else:
490 helpfunc = getattr(self, "help_"+cmdname, None)
491 if helpfunc:
492 doc = helpfunc()
493 else:
494 handler = self._get_cmd_handler(cmdname)
495 if handler:
496 doc = handler.__doc__
497 if doc is None:
498 return self.helpdefault(argv[1], handler != None)
499 else: # bare "help" command
500 doc = self.__class__.__doc__ # try class docstring
501 if doc is None:
502 # Try to provide some reasonable useful default help.
503 if self.cmdlooping:
504 prefix = ""
505 else:
506 prefix = self.name+' '
507 doc = """Usage:
508 %sCOMMAND [ARGS...]
509 %shelp [COMMAND]
510
511 ${option_list}
512 ${command_list}
513 ${help_list}
514 """ % (prefix, prefix)
515 cmdname = None
516
517 if doc: # *do* have help content, massage and print that
518 doc = self._help_reindent(doc)
519 doc = self._help_preprocess(doc, cmdname)
520 doc = doc.rstrip() + '\n' # trim down trailing space
521 self.stdout.write(self._str(doc))
522 self.stdout.flush()
523 do_help.aliases = ["?"]
524
525 def _help_reindent(self, help, indent=None):
526 """Hook to re-indent help strings before writing to stdout.
527
528 "help" is the help content to re-indent
529 "indent" is a string with which to indent each line of the
530 help content after normalizing. If unspecified or None
531 then the default is use: the 'self.helpindent' class
532 attribute. By default this is the empty string, i.e.
533 no indentation.
534
535 By default, all common leading whitespace is removed and then
536 the lot is indented by 'self.helpindent'. When calculating the
537 common leading whitespace the first line is ignored -- hence
538 help content for Conan can be written as follows and have the
539 expected indentation:
540
541 def do_crush(self, ...):
542 '''${cmd_name}: crush your enemies, see them driven before you...
543
544 c.f. Conan the Barbarian'''
545 """
546 if indent is None:
547 indent = self.helpindent
548 lines = help.splitlines(0)
549 _dedentlines(lines, skip_first_line=True)
550 lines = [(indent+line).rstrip() for line in lines]
551 return '\n'.join(lines)
552
553 def _help_preprocess(self, help, cmdname):
554 """Hook to preprocess a help string before writing to stdout.
555
556 "help" is the help string to process.
557 "cmdname" is the canonical sub-command name for which help
558 is being given, or None if the help is not specific to a
559 command.
560
561 By default the following template variables are interpolated in
562 help content. (Note: these are similar to Python 2.4's
563 string.Template interpolation but not quite.)
564
565 ${name}
566 The tool's/shell's name, i.e. 'self.name'.
567 ${option_list}
568 A formatted table of options for this shell/tool.
569 ${command_list}
570 A formatted table of available sub-commands.
571 ${help_list}
572 A formatted table of additional help topics (i.e. 'help_*'
573 methods with no matching 'do_*' method).
574 ${cmd_name}
575 The name (and aliases) for this sub-command formatted as:
576 "NAME (ALIAS1, ALIAS2, ...)".
577 ${cmd_usage}
578 A formatted usage block inferred from the command function
579 signature.
580 ${cmd_option_list}
581 A formatted table of options for this sub-command. (This is
582 only available for commands using the optparse integration,
583 i.e. using @cmdln.option decorators or manually setting the
584 'optparser' attribute on the 'do_*' method.)
585
586 Returns the processed help.
587 """
588 preprocessors = {
589 "${name}": self._help_preprocess_name,
590 "${option_list}": self._help_preprocess_option_list,
591 "${command_list}": self._help_preprocess_command_list,
592 "${help_list}": self._help_preprocess_help_list,
593 "${cmd_name}": self._help_preprocess_cmd_name,
594 "${cmd_usage}": self._help_preprocess_cmd_usage,
595 "${cmd_option_list}": self._help_preprocess_cmd_option_list,
596 }
597
598 for marker, preprocessor in preprocessors.items():
599 if marker in help:
600 help = preprocessor(help, cmdname)
601 return help
602
603 def _help_preprocess_name(self, help, cmdname=None):
604 return help.replace("${name}", self.name)
605
606 def _help_preprocess_option_list(self, help, cmdname=None):
607 marker = "${option_list}"
608 indent, indent_width = _get_indent(marker, help)
609 suffix = _get_trailing_whitespace(marker, help)
610
611 if self.optparser:
612 # Setup formatting options and format.
613 # - Indentation of 4 is better than optparse default of 2.
614 # C.f. Damian Conway's discussion of this in Perl Best
615 # Practices.
616 self.optparser.formatter.indent_increment = 4
617 self.optparser.formatter.current_indent = indent_width
618 block = self.optparser.format_option_help() + '\n'
619 else:
620 block = ""
621
622 help = help.replace(indent+marker+suffix, block, 1)
623 return help
624
625
626 def _help_preprocess_command_list(self, help, cmdname=None):
627 marker = "${command_list}"
628 indent, indent_width = _get_indent(marker, help)
629 suffix = _get_trailing_whitespace(marker, help)
630
631 # Find any aliases for commands.
632 token2canonical = self._get_canonical_map()
633 aliases = {}
634 for token, cmdname in token2canonical.items():
635 if token == cmdname:
636 continue
637 aliases.setdefault(cmdname, []).append(token)
638
639 # Get the list of (non-hidden) commands and their
640 # documentation, if any.
641 cmdnames = {} # use a dict to strip duplicates
642 for attr in self.get_names():
643 if attr.startswith("do_"):
644 cmdnames[attr[3:]] = True
645 cmdnames = cmdnames.keys()
646 cmdnames.sort()
647 linedata = []
648 for cmdname in cmdnames:
649 if aliases.get(cmdname):
650 a = aliases[cmdname]
651 a.sort()
652 cmdstr = "%s (%s)" % (cmdname, ", ".join(a))
653 else:
654 cmdstr = cmdname
655 doc = None
656 try:
657 helpfunc = getattr(self, 'help_'+cmdname)
658 except AttributeError:
659 handler = self._get_cmd_handler(cmdname)
660 if handler:
661 doc = handler.__doc__
662 else:
663 doc = helpfunc()
664
665 # Strip "${cmd_name}: " from the start of a command's doc. Best
666 # practice dictates that command help strings begin with this, but
667 # it isn't at all wanted for the command list.
668 to_strip = "${cmd_name}:"
669 if doc and doc.startswith(to_strip):
670 #log.debug("stripping %r from start of %s's help string",
671 # to_strip, cmdname)
672 doc = doc[len(to_strip):].lstrip()
673 linedata.append( (cmdstr, doc) )
674
675 if linedata:
676 subindent = indent + ' '*4
677 lines = _format_linedata(linedata, subindent, indent_width+4)
678 block = indent + "Commands:\n" \
679 + '\n'.join(lines) + "\n\n"
680 help = help.replace(indent+marker+suffix, block, 1)
681 return help
682
683 def _gen_names_and_attrs(self):
684 # Inheritance says we have to look in class and
685 # base classes; order is not important.
686 names = []
687 classes = [self.__class__]
688 while classes:
689 aclass = classes.pop(0)
690 if aclass.__bases__:
691 classes = classes + list(aclass.__bases__)
692 for name in dir(aclass):
693 yield (name, getattr(aclass, name))
694
695 def _help_preprocess_help_list(self, help, cmdname=None):
696 marker = "${help_list}"
697 indent, indent_width = _get_indent(marker, help)
698 suffix = _get_trailing_whitespace(marker, help)
699
700 # Determine the additional help topics, if any.
701 helpnames = {}
702 token2cmdname = self._get_canonical_map()
703 for attrname, attr in self._gen_names_and_attrs():
704 if not attrname.startswith("help_"):
705 continue
706 helpname = attrname[5:]
707 if helpname not in token2cmdname:
708 helpnames[helpname] = attr
709
710 if helpnames:
711 linedata = [(n, a.__doc__ or "") for n, a in helpnames.items()]
712 linedata.sort()
713
714 subindent = indent + ' '*4
715 lines = _format_linedata(linedata, subindent, indent_width+4)
716 block = (indent
717 + "Additional help topics (run `%s help TOPIC'):\n" % self.name
718 + '\n'.join(lines)
719 + "\n\n")
720 else:
721 block = ''
722 help = help.replace(indent+marker+suffix, block, 1)
723 return help
724
725 def _help_preprocess_cmd_name(self, help, cmdname=None):
726 marker = "${cmd_name}"
727 handler = self._get_cmd_handler(cmdname)
728 if not handler:
729 raise CmdlnError("cannot preprocess '%s' into help string: "
730 "could not find command handler for %r"
731 % (marker, cmdname))
732 s = cmdname
733 if hasattr(handler, "aliases"):
734 s += " (%s)" % (", ".join(handler.aliases))
735 help = help.replace(marker, s)
736 return help
737
738 #TODO: this only makes sense as part of the Cmdln class.
739 # Add hooks to add help preprocessing template vars and put
740 # this one on that class.
741 def _help_preprocess_cmd_usage(self, help, cmdname=None):
742 marker = "${cmd_usage}"
743 handler = self._get_cmd_handler(cmdname)
744 if not handler:
745 raise CmdlnError("cannot preprocess '%s' into help string: "
746 "could not find command handler for %r"
747 % (marker, cmdname))
748 indent, indent_width = _get_indent(marker, help)
749 suffix = _get_trailing_whitespace(marker, help)
750
751 # Extract the introspection bits we need.
752 func = handler.im_func
753 if func.func_defaults:
754 func_defaults = list(func.func_defaults)
755 else:
756 func_defaults = []
757 co_argcount = func.func_code.co_argcount
758 co_varnames = func.func_code.co_varnames
759 co_flags = func.func_code.co_flags
760 CO_FLAGS_ARGS = 4
761 CO_FLAGS_KWARGS = 8
762
763 # Adjust argcount for possible *args and **kwargs arguments.
764 argcount = co_argcount
765 if co_flags & CO_FLAGS_ARGS:
766 argcount += 1
767 if co_flags & CO_FLAGS_KWARGS:
768 argcount += 1
769
770 # Determine the usage string.
771 usage = "%s %s" % (self.name, cmdname)
772 if argcount <= 2: # handler ::= do_FOO(self, argv)
773 usage += " [ARGS...]"
774 elif argcount >= 3: # handler ::= do_FOO(self, subcmd, opts, ...)
775 argnames = list(co_varnames[3:argcount])
776 tail = ""
777 if co_flags & CO_FLAGS_KWARGS:
778 name = argnames.pop(-1)
779 import warnings
780 # There is no generally accepted mechanism for passing
781 # keyword arguments from the command line. Could
782 # *perhaps* consider: arg=value arg2=value2 ...
783 warnings.warn("argument '**%s' on '%s.%s' command "
784 "handler will never get values"
785 % (name, self.__class__.__name__,
786 func.func_name))
787 if co_flags & CO_FLAGS_ARGS:
788 name = argnames.pop(-1)
789 tail = "[%s...]" % name.upper()
790 while func_defaults:
791 func_defaults.pop(-1)
792 name = argnames.pop(-1)
793 tail = "[%s%s%s]" % (name.upper(), (tail and ' ' or ''), tail)
794 while argnames:
795 name = argnames.pop(-1)
796 tail = "%s %s" % (name.upper(), tail)
797 usage += ' ' + tail
798
799 block_lines = [
800 self.helpindent + "Usage:",
801 self.helpindent + ' '*4 + usage
802 ]
803 block = '\n'.join(block_lines) + '\n\n'
804
805 help = help.replace(indent+marker+suffix, block, 1)
806 return help
807
808 #TODO: this only makes sense as part of the Cmdln class.
809 # Add hooks to add help preprocessing template vars and put
810 # this one on that class.
811 def _help_preprocess_cmd_option_list(self, help, cmdname=None):
812 marker = "${cmd_option_list}"
813 handler = self._get_cmd_handler(cmdname)
814 if not handler:
815 raise CmdlnError("cannot preprocess '%s' into help string: "
816 "could not find command handler for %r"
817 % (marker, cmdname))
818 indent, indent_width = _get_indent(marker, help)
819 suffix = _get_trailing_whitespace(marker, help)
820 if hasattr(handler, "optparser"):
821 # Setup formatting options and format.
822 # - Indentation of 4 is better than optparse default of 2.
823 # C.f. Damian Conway's discussion of this in Perl Best
824 # Practices.
825 handler.optparser.formatter.indent_increment = 4
826 handler.optparser.formatter.current_indent = indent_width
827 block = handler.optparser.format_option_help() + '\n'
828 else:
829 block = ""
830
831 help = help.replace(indent+marker+suffix, block, 1)
832 return help
833
834 def _get_canonical_cmd_name(self, token):
835 map = self._get_canonical_map()
836 return map.get(token, None)
837
838 def _get_canonical_map(self):
839 """Return a mapping of available command names and aliases to
840 their canonical command name.
841 """
842 cacheattr = "_token2canonical"
843 if not hasattr(self, cacheattr):
844 # Get the list of commands and their aliases, if any.
845 token2canonical = {}
846 cmd2funcname = {} # use a dict to strip duplicates
847 for attr in self.get_names():
848 if attr.startswith("do_"):
849 cmdname = attr[3:]
850 elif attr.startswith("_do_"):
851 cmdname = attr[4:]
852 else:
853 continue
854 cmd2funcname[cmdname] = attr
855 token2canonical[cmdname] = cmdname
856 for cmdname, funcname in cmd2funcname.items(): # add aliases
857 func = getattr(self, funcname)
858 aliases = getattr(func, "aliases", [])
859 for alias in aliases:
860 if alias in cmd2funcname:
861 import warnings
862 warnings.warn("'%s' alias for '%s' command conflicts "
863 "with '%s' handler"
864 % (alias, cmdname, cmd2funcname[alias]))
865 continue
866 token2canonical[alias] = cmdname
867 setattr(self, cacheattr, token2canonical)
868 return getattr(self, cacheattr)
869
870 def _get_cmd_handler(self, cmdname):
871 handler = None
872 try:
873 handler = getattr(self, 'do_' + cmdname)
874 except AttributeError:
875 try:
876 # Private command handlers begin with "_do_".
877 handler = getattr(self, '_do_' + cmdname)
878 except AttributeError:
879 pass
880 return handler
881
882 def _do_EOF(self, argv):
883 # Default EOF handler
884 # Note: an actual EOF is redirected to this command.
885 #TODO: separate name for this. Currently it is available from
886 # command-line. Is that okay?
887 self.stdout.write('\n')
888 self.stdout.flush()
889 self.stop = True
890
891 def emptyline(self):
892 # Different from cmd.Cmd: don't repeat the last command for an
893 # emptyline.
894 if self.cmdlooping:
895 pass
896 else:
897 return self.do_help(["help"])
898
899
900#---- optparse.py extension to fix (IMO) some deficiencies
901#
902# See the class _OptionParserEx docstring for details.
903#
904
905class StopOptionProcessing(Exception):
906 """Indicate that option *and argument* processing should stop
907 cleanly. This is not an error condition. It is similar in spirit to
908 StopIteration. This is raised by _OptionParserEx's default "help"
909 and "version" option actions and can be raised by custom option
910 callbacks too.
911
912 Hence the typical CmdlnOptionParser (a subclass of _OptionParserEx)
913 usage is:
914
915 parser = CmdlnOptionParser(mycmd)
916 parser.add_option("-f", "--force", dest="force")
917 ...
918 try:
919 opts, args = parser.parse_args()
920 except StopOptionProcessing:
921 # normal termination, "--help" was probably given
922 sys.exit(0)
923 """
924
925class _OptionParserEx(optparse.OptionParser):
926 """An optparse.OptionParser that uses exceptions instead of sys.exit.
927
928 This class is an extension of optparse.OptionParser that differs
929 as follows:
930 - Correct (IMO) the default OptionParser error handling to never
931 sys.exit(). Instead OptParseError exceptions are passed through.
932 - Add the StopOptionProcessing exception (a la StopIteration) to
933 indicate normal termination of option processing.
934 See StopOptionProcessing's docstring for details.
935
936 I'd also like to see the following in the core optparse.py, perhaps
937 as a RawOptionParser which would serve as a base class for the more
938 generally used OptionParser (that works as current):
939 - Remove the implicit addition of the -h|--help and --version
940 options. They can get in the way (e.g. if want '-?' and '-V' for
941 these as well) and it is not hard to do:
942 optparser.add_option("-h", "--help", action="help")
943 optparser.add_option("--version", action="version")
944 These are good practices, just not valid defaults if they can
945 get in the way.
946 """
947 def error(self, msg):
948 raise optparse.OptParseError(msg)
949
950 def exit(self, status=0, msg=None):
951 if status == 0:
952 raise StopOptionProcessing(msg)
953 else:
954 #TODO: don't lose status info here
955 raise optparse.OptParseError(msg)
956
957
958
959#---- optparse.py-based option processing support
960
961class CmdlnOptionParser(_OptionParserEx):
962 """An optparse.OptionParser class more appropriate for top-level
963 Cmdln options. For parsing of sub-command options, see
964 SubCmdOptionParser.
965
966 Changes:
967 - disable_interspersed_args() by default, because a Cmdln instance
968 has sub-commands which may themselves have options.
969 - Redirect print_help() to the Cmdln.do_help() which is better
970 equiped to handle the "help" action.
971 - error() will raise a CmdlnUserError: OptionParse.error() is meant
972 to be called for user errors. Raising a well-known error here can
973 make error handling clearer.
974 - Also see the changes in _OptionParserEx.
975 """
976 def __init__(self, cmdln, **kwargs):
977 self.cmdln = cmdln
978 kwargs["prog"] = self.cmdln.name
979 _OptionParserEx.__init__(self, **kwargs)
980 self.disable_interspersed_args()
981
982 def print_help(self, file=None):
983 self.cmdln.onecmd(["help"])
984
985 def error(self, msg):
986 raise CmdlnUserError(msg)
987
988
989class SubCmdOptionParser(_OptionParserEx):
990 def set_cmdln_info(self, cmdln, subcmd):
991 """Called by Cmdln to pass relevant info about itself needed
992 for print_help().
993 """
994 self.cmdln = cmdln
995 self.subcmd = subcmd
996
997 def print_help(self, file=None):
998 self.cmdln.onecmd(["help", self.subcmd])
999
1000 def error(self, msg):
1001 raise CmdlnUserError(msg)
1002
1003
1004def option(*args, **kwargs):
1005 """Decorator to add an option to the optparser argument of a Cmdln
1006 subcommand.
1007
1008 Example:
1009 class MyShell(cmdln.Cmdln):
1010 @cmdln.option("-f", "--force", help="force removal")
1011 def do_remove(self, subcmd, opts, *args):
1012 #...
1013 """
1014 #XXX Is there a possible optimization for many options to not have a
1015 # large stack depth here?
1016 def decorate(f):
1017 if not hasattr(f, "optparser"):
1018 f.optparser = SubCmdOptionParser()
1019 f.optparser.add_option(*args, **kwargs)
1020 return f
1021 return decorate
1022
1023
1024class Cmdln(RawCmdln):
1025 """An improved (on cmd.Cmd) framework for building multi-subcommand
1026 scripts (think "svn" & "cvs") and simple shells (think "pdb" and
1027 "gdb").
1028
1029 A simple example:
1030
1031 import cmdln
1032
1033 class MySVN(cmdln.Cmdln):
1034 name = "svn"
1035
1036 @cmdln.aliases('stat', 'st')
1037 @cmdln.option('-v', '--verbose', action='store_true'
1038 help='print verbose information')
1039 def do_status(self, subcmd, opts, *paths):
1040 print "handle 'svn status' command"
1041
1042 #...
1043
1044 if __name__ == "__main__":
1045 shell = MySVN()
1046 retval = shell.main()
1047 sys.exit(retval)
1048
1049 'Cmdln' extends 'RawCmdln' by providing optparse option processing
1050 integration. See this class' _dispatch_cmd() docstring and
1051 <http://trentm.com/projects/cmdln> for more information.
1052 """
1053 def _dispatch_cmd(self, handler, argv):
1054 """Introspect sub-command handler signature to determine how to
1055 dispatch the command. The raw handler provided by the base
1056 'RawCmdln' class is still supported:
1057
1058 def do_foo(self, argv):
1059 # 'argv' is the vector of command line args, argv[0] is
1060 # the command name itself (i.e. "foo" or an alias)
1061 pass
1062
1063 In addition, if the handler has more than 2 arguments option
1064 processing is automatically done (using optparse):
1065
1066 @cmdln.option('-v', '--verbose', action='store_true')
1067 def do_bar(self, subcmd, opts, *args):
1068 # subcmd = <"bar" or an alias>
1069 # opts = <an optparse.Values instance>
1070 if opts.verbose:
1071 print "lots of debugging output..."
1072 # args = <tuple of arguments>
1073 for arg in args:
1074 bar(arg)
1075
1076 TODO: explain that "*args" can be other signatures as well.
1077
1078 The `cmdln.option` decorator corresponds to an `add_option()`
1079 method call on an `optparse.OptionParser` instance.
1080
1081 You can declare a specific number of arguments:
1082
1083 @cmdln.option('-v', '--verbose', action='store_true')
1084 def do_bar2(self, subcmd, opts, bar_one, bar_two):
1085 #...
1086
1087 and an appropriate error message will be raised/printed if the
1088 command is called with a different number of args.
1089 """
1090 co_argcount = handler.im_func.func_code.co_argcount
1091 if co_argcount == 2: # handler ::= do_foo(self, argv)
1092 return handler(argv)
1093 elif co_argcount >= 3: # handler ::= do_foo(self, subcmd, opts, ...)
1094 try:
1095 optparser = handler.optparser
1096 except AttributeError:
1097 optparser = handler.im_func.optparser = SubCmdOptionParser()
1098 assert isinstance(optparser, SubCmdOptionParser)
1099 optparser.set_cmdln_info(self, argv[0])
1100 try:
1101 opts, args = optparser.parse_args(argv[1:])
1102 except StopOptionProcessing:
1103 #TODO: this doesn't really fly for a replacement of
1104 # optparse.py behaviour, does it?
1105 return 0 # Normal command termination
1106
1107 try:
1108 return handler(argv[0], opts, *args)
1109 except TypeError, ex:
1110 # Some TypeError's are user errors:
1111 # do_foo() takes at least 4 arguments (3 given)
1112 # do_foo() takes at most 5 arguments (6 given)
1113 # do_foo() takes exactly 5 arguments (6 given)
1114 # Raise CmdlnUserError for these with a suitably
1115 # massaged error message.
1116 import sys
1117 tb = sys.exc_info()[2] # the traceback object
1118 if tb.tb_next is not None:
1119 # If the traceback is more than one level deep, then the
1120 # TypeError do *not* happen on the "handler(...)" call
1121 # above. In that we don't want to handle it specially
1122 # here: it would falsely mask deeper code errors.
1123 raise
1124 msg = ex.args[0]
1125 match = _INCORRECT_NUM_ARGS_RE.search(msg)
1126 if match:
1127 msg = list(match.groups())
1128 msg[1] = int(msg[1]) - 3
1129 if msg[1] == 1:
1130 msg[2] = msg[2].replace("arguments", "argument")
1131 msg[3] = int(msg[3]) - 3
1132 msg = ''.join(map(str, msg))
1133 raise CmdlnUserError(msg)
1134 else:
1135 raise
1136 else:
1137 raise CmdlnError("incorrect argcount for %s(): takes %d, must "
1138 "take 2 for 'argv' signature or 3+ for 'opts' "
1139 "signature" % (handler.__name__, co_argcount))
1140
1141
1142
1143#---- internal support functions
1144
1145def _format_linedata(linedata, indent, indent_width):
1146 """Format specific linedata into a pleasant layout.
1147
1148 "linedata" is a list of 2-tuples of the form:
1149 (<item-display-string>, <item-docstring>)
1150 "indent" is a string to use for one level of indentation
1151 "indent_width" is a number of columns by which the
1152 formatted data will be indented when printed.
1153
1154 The <item-display-string> column is held to 15 columns.
1155 """
1156 lines = []
1157 WIDTH = 78 - indent_width
1158 SPACING = 2
1159 NAME_WIDTH_LOWER_BOUND = 13
1160 NAME_WIDTH_UPPER_BOUND = 16
1161 NAME_WIDTH = max([len(s) for s,d in linedata])
1162 if NAME_WIDTH < NAME_WIDTH_LOWER_BOUND:
1163 NAME_WIDTH = NAME_WIDTH_LOWER_BOUND
1164 else:
1165 NAME_WIDTH = NAME_WIDTH_UPPER_BOUND
1166
1167 DOC_WIDTH = WIDTH - NAME_WIDTH - SPACING
1168 for namestr, doc in linedata:
1169 line = indent + namestr
1170 if len(namestr) <= NAME_WIDTH:
1171 line += ' ' * (NAME_WIDTH + SPACING - len(namestr))
1172 else:
1173 lines.append(line)
1174 line = indent + ' ' * (NAME_WIDTH + SPACING)
1175 line += _summarize_doc(doc, DOC_WIDTH)
1176 lines.append(line.rstrip())
1177 return lines
1178
1179def _summarize_doc(doc, length=60):
1180 r"""Parse out a short one line summary from the given doclines.
1181
1182 "doc" is the doc string to summarize.
1183 "length" is the max length for the summary
1184
1185 >>> _summarize_doc("this function does this")
1186 'this function does this'
1187 >>> _summarize_doc("this function does this", 10)
1188 'this fu...'
1189 >>> _summarize_doc("this function does this\nand that")
1190 'this function does this and that'
1191 >>> _summarize_doc("this function does this\n\nand that")
1192 'this function does this'
1193 """
1194 import re
1195 if doc is None:
1196 return ""
1197 assert length > 3, "length <= 3 is absurdly short for a doc summary"
1198 doclines = doc.strip().splitlines(0)
1199 if not doclines:
1200 return ""
1201
1202 summlines = []
1203 for i, line in enumerate(doclines):
1204 stripped = line.strip()
1205 if not stripped:
1206 break
1207 summlines.append(stripped)
1208 if len(''.join(summlines)) >= length:
1209 break
1210
1211 summary = ' '.join(summlines)
1212 if len(summary) > length:
1213 summary = summary[:length-3] + "..."
1214 return summary
1215
1216
1217def line2argv(line):
1218 r"""Parse the given line into an argument vector.
1219
1220 "line" is the line of input to parse.
1221
1222 This may get niggly when dealing with quoting and escaping. The
1223 current state of this parsing may not be completely thorough/correct
1224 in this respect.
1225
1226 >>> from cmdln import line2argv
1227 >>> line2argv("foo")
1228 ['foo']
1229 >>> line2argv("foo bar")
1230 ['foo', 'bar']
1231 >>> line2argv("foo bar ")
1232 ['foo', 'bar']
1233 >>> line2argv(" foo bar")
1234 ['foo', 'bar']
1235
1236 Quote handling:
1237
1238 >>> line2argv("'foo bar'")
1239 ['foo bar']
1240 >>> line2argv('"foo bar"')
1241 ['foo bar']
1242 >>> line2argv(r'"foo\"bar"')
1243 ['foo"bar']
1244 >>> line2argv("'foo bar' spam")
1245 ['foo bar', 'spam']
1246 >>> line2argv("'foo 'bar spam")
1247 ['foo bar', 'spam']
1248
1249 >>> line2argv('some\tsimple\ttests')
1250 ['some', 'simple', 'tests']
1251 >>> line2argv('a "more complex" test')
1252 ['a', 'more complex', 'test']
1253 >>> line2argv('a more="complex test of " quotes')
1254 ['a', 'more=complex test of ', 'quotes']
1255 >>> line2argv('a more" complex test of " quotes')
1256 ['a', 'more complex test of ', 'quotes']
1257 >>> line2argv('an "embedded \\"quote\\""')
1258 ['an', 'embedded "quote"']
1259
1260 # Komodo bug 48027
1261 >>> line2argv('foo bar C:\\')
1262 ['foo', 'bar', 'C:\\']
1263
1264 # Komodo change 127581
1265 >>> line2argv(r'"\test\slash" "foo bar" "foo\"bar"')
1266 ['\\test\\slash', 'foo bar', 'foo"bar']
1267
1268 # Komodo change 127629
1269 >>> if sys.platform == "win32":
1270 ... line2argv(r'\foo\bar') == ['\\foo\\bar']
1271 ... line2argv(r'\\foo\\bar') == ['\\\\foo\\\\bar']
1272 ... line2argv('"foo') == ['foo']
1273 ... else:
1274 ... line2argv(r'\foo\bar') == ['foobar']
1275 ... line2argv(r'\\foo\\bar') == ['\\foo\\bar']
1276 ... try:
1277 ... line2argv('"foo')
1278 ... except ValueError, ex:
1279 ... "not terminated" in str(ex)
1280 True
1281 True
1282 True
1283 """
1284 import string
1285 line = line.strip()
1286 argv = []
1287 state = "default"
1288 arg = None # the current argument being parsed
1289 i = -1
1290 while 1:
1291 i += 1
1292 if i >= len(line):
1293 break
1294 ch = line[i]
1295
1296 if ch == "\\" and i+1 < len(line):
1297 # escaped char always added to arg, regardless of state
1298 if arg is None:
1299 arg = ""
1300 if (sys.platform == "win32"
1301 or state in ("double-quoted", "single-quoted")
1302 ) and line[i+1] not in tuple('"\''):
1303 arg += ch
1304 i += 1
1305 arg += line[i]
1306 continue
1307
1308 if state == "single-quoted":
1309 if ch == "'":
1310 state = "default"
1311 else:
1312 arg += ch
1313 elif state == "double-quoted":
1314 if ch == '"':
1315 state = "default"
1316 else:
1317 arg += ch
1318 elif state == "default":
1319 if ch == '"':
1320 if arg is None:
1321 arg = ""
1322 state = "double-quoted"
1323 elif ch == "'":
1324 if arg is None:
1325 arg = ""
1326 state = "single-quoted"
1327 elif ch in string.whitespace:
1328 if arg is not None:
1329 argv.append(arg)
1330 arg = None
1331 else:
1332 if arg is None:
1333 arg = ""
1334 arg += ch
1335 if arg is not None:
1336 argv.append(arg)
1337 if not sys.platform == "win32" and state != "default":
1338 raise ValueError("command line is not terminated: unfinished %s "
1339 "segment" % state)
1340 return argv
1341
1342
1343def argv2line(argv):
1344 r"""Put together the given argument vector into a command line.
1345
1346 "argv" is the argument vector to process.
1347
1348 >>> from cmdln import argv2line
1349 >>> argv2line(['foo'])
1350 'foo'
1351 >>> argv2line(['foo', 'bar'])
1352 'foo bar'
1353 >>> argv2line(['foo', 'bar baz'])
1354 'foo "bar baz"'
1355 >>> argv2line(['foo"bar'])
1356 'foo"bar'
1357 >>> print argv2line(['foo" bar'])
1358 'foo" bar'
1359 >>> print argv2line(["foo' bar"])
1360 "foo' bar"
1361 >>> argv2line(["foo'bar"])
1362 "foo'bar"
1363 """
1364 escapedArgs = []
1365 for arg in argv:
1366 if ' ' in arg and '"' not in arg:
1367 arg = '"'+arg+'"'
1368 elif ' ' in arg and "'" not in arg:
1369 arg = "'"+arg+"'"
1370 elif ' ' in arg:
1371 arg = arg.replace('"', r'\"')
1372 arg = '"'+arg+'"'
1373 escapedArgs.append(arg)
1374 return ' '.join(escapedArgs)
1375
1376
1377# Recipe: dedent (0.1) in /Users/trentm/tm/recipes/cookbook
1378def _dedentlines(lines, tabsize=8, skip_first_line=False):
1379 """_dedentlines(lines, tabsize=8, skip_first_line=False) -> dedented lines
1380
1381 "lines" is a list of lines to dedent.
1382 "tabsize" is the tab width to use for indent width calculations.
1383 "skip_first_line" is a boolean indicating if the first line should
1384 be skipped for calculating the indent width and for dedenting.
1385 This is sometimes useful for docstrings and similar.
1386
1387 Same as dedent() except operates on a sequence of lines. Note: the
1388 lines list is modified **in-place**.
1389 """
1390 DEBUG = False
1391 if DEBUG:
1392 print "dedent: dedent(..., tabsize=%d, skip_first_line=%r)"\
1393 % (tabsize, skip_first_line)
1394 indents = []
1395 margin = None
1396 for i, line in enumerate(lines):
1397 if i == 0 and skip_first_line:
1398 continue
1399 indent = 0
1400 for ch in line:
1401 if ch == ' ':
1402 indent += 1
1403 elif ch == '\t':
1404 indent += tabsize - (indent % tabsize)
1405 elif ch in '\r\n':
1406 continue # skip all-whitespace lines
1407 else:
1408 break
1409 else:
1410 continue # skip all-whitespace lines
1411 if DEBUG:
1412 print "dedent: indent=%d: %r" % (indent, line)
1413 if margin is None:
1414 margin = indent
1415 else:
1416 margin = min(margin, indent)
1417 if DEBUG:
1418 print "dedent: margin=%r" % margin
1419
1420 if margin is not None and margin > 0:
1421 for i, line in enumerate(lines):
1422 if i == 0 and skip_first_line:
1423 continue
1424 removed = 0
1425 for j, ch in enumerate(line):
1426 if ch == ' ':
1427 removed += 1
1428 elif ch == '\t':
1429 removed += tabsize - (removed % tabsize)
1430 elif ch in '\r\n':
1431 if DEBUG:
1432 print "dedent: %r: EOL -> strip up to EOL" % line
1433 lines[i] = lines[i][j:]
1434 break
1435 else:
1436 raise ValueError("unexpected non-whitespace char %r in "
1437 "line %r while removing %d-space margin"
1438 % (ch, line, margin))
1439 if DEBUG:
1440 print "dedent: %r: %r -> removed %d/%d"\
1441 % (line, ch, removed, margin)
1442 if removed == margin:
1443 lines[i] = lines[i][j+1:]
1444 break
1445 elif removed > margin:
1446 lines[i] = ' '*(removed-margin) + lines[i][j+1:]
1447 break
1448 return lines
1449
1450def _dedent(text, tabsize=8, skip_first_line=False):
1451 """_dedent(text, tabsize=8, skip_first_line=False) -> dedented text
1452
1453 "text" is the text to dedent.
1454 "tabsize" is the tab width to use for indent width calculations.
1455 "skip_first_line" is a boolean indicating if the first line should
1456 be skipped for calculating the indent width and for dedenting.
1457 This is sometimes useful for docstrings and similar.
1458
1459 textwrap.dedent(s), but don't expand tabs to spaces
1460 """
1461 lines = text.splitlines(1)
1462 _dedentlines(lines, tabsize=tabsize, skip_first_line=skip_first_line)
1463 return ''.join(lines)
1464
1465
1466def _get_indent(marker, s, tab_width=8):
1467 """_get_indent(marker, s, tab_width=8) ->
1468 (<indentation-of-'marker'>, <indentation-width>)"""
1469 # Figure out how much the marker is indented.
1470 INDENT_CHARS = tuple(' \t')
1471 start = s.index(marker)
1472 i = start
1473 while i > 0:
1474 if s[i-1] not in INDENT_CHARS:
1475 break
1476 i -= 1
1477 indent = s[i:start]
1478 indent_width = 0
1479 for ch in indent:
1480 if ch == ' ':
1481 indent_width += 1
1482 elif ch == '\t':
1483 indent_width += tab_width - (indent_width % tab_width)
1484 return indent, indent_width
1485
1486def _get_trailing_whitespace(marker, s):
1487 """Return the whitespace content trailing the given 'marker' in string 's',
1488 up to and including a newline.
1489 """
1490 suffix = ''
1491 start = s.index(marker) + len(marker)
1492 i = start
1493 while i < len(s):
1494 if s[i] in ' \t':
1495 suffix += s[i]
1496 elif s[i] in '\r\n':
1497 suffix += s[i]
1498 if s[i] == '\r' and i+1 < len(s) and s[i+1] == '\n':
1499 suffix += s[i+1]
1500 break
1501 else:
1502 break
1503 i += 1
1504 return suffix
1505
1506
1507
1508#---- bash completion support
1509# Note: This is still experimental. I expect to change this
1510# significantly.
1511#
1512# To get Bash completion for a cmdln.Cmdln class, run the following
1513# bash command:
1514# $ complete -C 'python -m cmdln /path/to/script.py CmdlnClass' cmdname
1515# For example:
1516# $ complete -C 'python -m cmdln ~/bin/svn.py SVN' svn
1517#
1518#TODO: Simplify the above so don't have to given path to script (try to
1519# find it on PATH, if possible). Could also make class name
1520# optional if there is only one in the module (common case).
1521
1522if __name__ == "__main__" and len(sys.argv) == 6:
1523 def _log(s):
1524 return # no-op, comment out for debugging
1525 from os.path import expanduser
1526 fout = open(expanduser("~/tmp/bashcpln.log"), 'a')
1527 fout.write(str(s) + '\n')
1528 fout.close()
1529
1530 # Recipe: module_from_path (1.0.1+)
1531 def _module_from_path(path):
1532 import imp, os, sys
1533 path = os.path.expanduser(path)
1534 dir = os.path.dirname(path) or os.curdir
1535 name = os.path.splitext(os.path.basename(path))[0]
1536 sys.path.insert(0, dir)
1537 try:
1538 iinfo = imp.find_module(name, [dir])
1539 return imp.load_module(name, *iinfo)
1540 finally:
1541 sys.path.remove(dir)
1542
1543 def _get_bash_cplns(script_path, class_name, cmd_name,
1544 token, preceding_token):
1545 _log('--')
1546 _log('get_cplns(%r, %r, %r, %r, %r)'
1547 % (script_path, class_name, cmd_name, token, preceding_token))
1548 comp_line = os.environ["COMP_LINE"]
1549 comp_point = int(os.environ["COMP_POINT"])
1550 _log("COMP_LINE: %r" % comp_line)
1551 _log("COMP_POINT: %r" % comp_point)
1552
1553 try:
1554 script = _module_from_path(script_path)
1555 except ImportError, ex:
1556 _log("error importing `%s': %s" % (script_path, ex))
1557 return []
1558 shell = getattr(script, class_name)()
1559 cmd_map = shell._get_canonical_map()
1560 del cmd_map["EOF"]
1561
1562 # Determine if completing the sub-command name.
1563 parts = comp_line[:comp_point].split(None, 1)
1564 _log(parts)
1565 if len(parts) == 1 or not (' ' in parts[1] or '\t' in parts[1]):
1566 #TODO: if parts[1].startswith('-'): handle top-level opts
1567 _log("complete sub-command names")
1568 matches = {}
1569 for name, canon_name in cmd_map.items():
1570 if name.startswith(token):
1571 matches[name] = canon_name
1572 if not matches:
1573 return []
1574 elif len(matches) == 1:
1575 return matches.keys()
1576 elif len(set(matches.values())) == 1:
1577 return [matches.values()[0]]
1578 else:
1579 return matches.keys()
1580
1581 # Otherwise, complete options for the given sub-command.
1582 #TODO: refine this so it does the right thing with option args
1583 if token.startswith('-'):
1584 cmd_name = comp_line.split(None, 2)[1]
1585 try:
1586 cmd_canon_name = cmd_map[cmd_name]
1587 except KeyError:
1588 return []
1589 handler = shell._get_cmd_handler(cmd_canon_name)
1590 optparser = getattr(handler, "optparser", None)
1591 if optparser is None:
1592 optparser = SubCmdOptionParser()
1593 opt_strs = []
1594 for option in optparser.option_list:
1595 for opt_str in option._short_opts + option._long_opts:
1596 if opt_str.startswith(token):
1597 opt_strs.append(opt_str)
1598 return opt_strs
1599
1600 return []
1601
1602 for cpln in _get_bash_cplns(*sys.argv[1:]):
1603 print cpln
1604
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-05-24 00:12:45 +0000