Mercurial > python-cmd2
annotate cmd2.py @ 334:99dd71cb477a
run() folded into app.cmdloop()
| author | cat@eee |
|---|---|
| date | Fri, 12 Feb 2010 23:29:19 -0500 |
| parents | 45e70737791f |
| children | f69211e2c570 |
| rev | line source |
|---|---|
| 230 | 1 """Variant on standard library's cmd with extra features. |
| 2 | |
| 3 To use, simply import cmd2.Cmd instead of cmd.Cmd; use precisely as though you | |
| 4 were using the standard library's cmd, while enjoying the extra features. | |
| 5 | |
| 6 Searchable command history (commands: "hi", "li", "run") | |
| 7 Load commands from file, save to file, edit commands in file | |
| 8 Multi-line commands | |
| 9 Case-insensitive commands | |
| 10 Special-character shortcut commands (beyond cmd's "@" and "!") | |
| 11 Settable environment parameters | |
| 12 Optional _onchange_{paramname} called when environment parameter changes | |
| 13 Parsing commands with `optparse` options (flags) | |
| 14 Redirection to file with >, >>; input from file with < | |
| 15 Easy transcript-based testing of applications (see example/example.py) | |
| 310 | 16 Bash-style ``select`` available |
| 230 | 17 |
| 18 Note that redirection with > and | will only work if `self.stdout.write()` | |
| 19 is used in place of `print`. The standard library's `cmd` module is | |
| 20 written to use `self.stdout.write()`, | |
| 21 | |
| 22 - Catherine Devlin, Jan 03 2008 - catherinedevlin.blogspot.com | |
| 23 | |
| 24 mercurial repository at http://www.assembla.com/wiki/show/python-cmd2 | |
| 25 """ | |
|
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26 import cmd |
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27 import re |
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28 import os |
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29 import sys |
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30 import optparse |
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31 import subprocess |
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32 import tempfile |
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33 import doctest |
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34 import unittest |
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35 import datetime |
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36 import urllib |
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37 import glob |
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38 import traceback |
| 312 | 39 import platform |
| 323 | 40 import copy |
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41 from code import InteractiveConsole, InteractiveInterpreter, softspace |
| 230 | 42 from optparse import make_option |
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43 |
| 309 | 44 if sys.version_info[0] > 2: |
| 45 import pyparsing_py3 as pyparsing | |
| 46 else: | |
| 47 import pyparsing | |
| 48 | |
| 312 | 49 __version__ = '0.6.0' |
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50 |
| 230 | 51 class OptionParser(optparse.OptionParser): |
| 52 def exit(self, status=0, msg=None): | |
| 53 self.values._exit = True | |
| 54 if msg: | |
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55 print (msg) |
| 230 | 56 |
| 57 def print_help(self, *args, **kwargs): | |
| 58 try: | |
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59 print (self._func.__doc__) |
| 230 | 60 except AttributeError: |
| 61 pass | |
| 62 optparse.OptionParser.print_help(self, *args, **kwargs) | |
| 63 | |
| 64 def error(self, msg): | |
| 65 """error(msg : string) | |
| 66 | |
| 67 Print a usage message incorporating 'msg' to stderr and exit. | |
| 68 If you override this in a subclass, it should not return -- it | |
| 69 should either exit or raise an exception. | |
| 70 """ | |
| 71 raise | |
| 72 | |
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73 def remaining_args(oldArgs, newArgList): |
| 230 | 74 ''' |
| 285 | 75 Preserves the spacing originally in the argument after |
| 76 the removal of options. | |
| 77 | |
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78 >>> remaining_args('-f bar bar cow', ['bar', 'cow']) |
| 230 | 79 'bar cow' |
| 80 ''' | |
| 81 pattern = '\s+'.join(re.escape(a) for a in newArgList) + '\s*$' | |
| 82 matchObj = re.search(pattern, oldArgs) | |
| 83 return oldArgs[matchObj.start():] | |
| 280 | 84 |
| 85 def _attr_get_(obj, attr): | |
| 86 '''Returns an attribute's value, or None (no error) if undefined. | |
| 286 | 87 Analagous to .get() for dictionaries. Useful when checking for |
| 88 value of options that may not have been defined on a given | |
| 89 method.''' | |
| 280 | 90 try: |
| 91 return getattr(obj, attr) | |
| 92 except AttributeError: | |
| 93 return None | |
| 283 | 94 |
| 95 optparse.Values.get = _attr_get_ | |
| 96 | |
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97 options_defined = [] # used to distinguish --options from SQL-style --comments |
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98 |
| 230 | 99 def options(option_list): |
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100 '''Used as a decorator and passed a list of optparse-style options, |
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101 alters a cmd2 methodo populate its ``opts`` argument from its |
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102 raw text argument. |
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103 |
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104 Example: transform |
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105 def do_something(self, arg): |
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106 |
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107 into |
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108 @options([make_option('-q', '--quick', action="store_true", |
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109 help="Makes things fast")]) |
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110 def do_something(self, arg, opts): |
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111 if opts.quick: |
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112 self.fast_button = True |
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113 ''' |
| 296 | 114 if not isinstance(option_list, list): |
| 298 | 115 option_list = [option_list] |
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116 for opt in option_list: |
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117 options_defined.append(pyparsing.Literal(opt.get_opt_string())) |
| 230 | 118 def option_setup(func): |
| 119 optionParser = OptionParser() | |
| 120 for opt in option_list: | |
| 121 optionParser.add_option(opt) | |
| 122 optionParser.set_usage("%s [options] arg" % func.__name__.strip('do_')) | |
| 123 optionParser._func = func | |
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124 def new_func(instance, arg): |
| 230 | 125 try: |
| 302 | 126 opts, newArgList = optionParser.parse_args(arg.split()) |
| 285 | 127 # Must find the remaining args in the original argument list, but |
| 128 # mustn't include the command itself | |
| 302 | 129 #if hasattr(arg, 'parsed') and newArgList[0] == arg.parsed.command: |
| 130 # newArgList = newArgList[1:] | |
| 131 newArgs = remaining_args(arg, newArgList) | |
| 301 | 132 if isinstance(arg, ParsedString): |
| 133 arg = arg.with_args_replaced(newArgs) | |
| 134 else: | |
| 135 arg = newArgs | |
| 230 | 136 except (optparse.OptionValueError, optparse.BadOptionError, |
| 137 optparse.OptionError, optparse.AmbiguousOptionError, | |
| 138 optparse.OptionConflictError), e: | |
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139 print (e) |
| 230 | 140 optionParser.print_help() |
| 141 return | |
| 142 if hasattr(opts, '_exit'): | |
| 143 return None | |
| 144 result = func(instance, arg, opts) | |
| 145 return result | |
| 289 | 146 new_func.__doc__ = '%s\n%s' % (func.__doc__, optionParser.format_help()) |
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147 return new_func |
| 230 | 148 return option_setup |
| 149 | |
| 150 class PasteBufferError(EnvironmentError): | |
| 151 if sys.platform[:3] == 'win': | |
| 152 errmsg = """Redirecting to or from paste buffer requires pywin32 | |
| 153 to be installed on operating system. | |
| 154 Download from http://sourceforge.net/projects/pywin32/""" | |
| 155 else: | |
| 156 errmsg = """Redirecting to or from paste buffer requires xclip | |
| 157 to be installed on operating system. | |
| 158 On Debian/Ubuntu, 'sudo apt-get install xclip' will install it.""" | |
| 159 def __init__(self): | |
| 160 Exception.__init__(self, self.errmsg) | |
| 161 | |
| 162 pastebufferr = """Redirecting to or from paste buffer requires %s | |
| 163 to be installed on operating system. | |
| 164 %s""" | |
| 286 | 165 |
| 230 | 166 if subprocess.mswindows: |
| 167 try: | |
| 168 import win32clipboard | |
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169 def get_paste_buffer(): |
| 230 | 170 win32clipboard.OpenClipboard(0) |
| 171 try: | |
| 172 result = win32clipboard.GetClipboardData() | |
| 173 except TypeError: | |
| 174 result = '' #non-text | |
| 175 win32clipboard.CloseClipboard() | |
| 176 return result | |
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177 def write_to_paste_buffer(txt): |
| 230 | 178 win32clipboard.OpenClipboard(0) |
| 179 win32clipboard.EmptyClipboard() | |
| 180 win32clipboard.SetClipboardText(txt) | |
| 181 win32clipboard.CloseClipboard() | |
| 182 except ImportError: | |
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183 def get_paste_buffer(*args): |
| 230 | 184 raise OSError, pastebufferr % ('pywin32', 'Download from http://sourceforge.net/projects/pywin32/') |
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185 setPasteBuffer = get_paste_buffer |
| 230 | 186 else: |
| 187 can_clip = False | |
| 188 try: | |
| 189 subprocess.check_call('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 190 can_clip = True | |
| 191 except AttributeError: # check_call not defined, Python < 2.5 | |
| 192 teststring = 'Testing for presence of xclip.' | |
| 193 xclipproc = subprocess.Popen('xclip -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 194 xclipproc.stdin.write(teststring) | |
| 195 xclipproc.stdin.close() | |
| 196 xclipproc = subprocess.Popen('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 197 if xclipproc.stdout.read() == teststring: | |
| 198 can_clip = True | |
| 199 except (subprocess.CalledProcessError, OSError, IOError): | |
| 200 pass | |
| 201 if can_clip: | |
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202 def get_paste_buffer(): |
| 230 | 203 xclipproc = subprocess.Popen('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) |
| 204 return xclipproc.stdout.read() | |
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205 def write_to_paste_buffer(txt): |
| 230 | 206 xclipproc = subprocess.Popen('xclip -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) |
| 207 xclipproc.stdin.write(txt) | |
| 208 xclipproc.stdin.close() | |
| 209 # but we want it in both the "primary" and "mouse" clipboards | |
| 210 xclipproc = subprocess.Popen('xclip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 211 xclipproc.stdin.write(txt) | |
| 212 xclipproc.stdin.close() | |
| 213 else: | |
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214 def get_paste_buffer(*args): |
| 230 | 215 raise OSError, pastebufferr % ('xclip', 'On Debian/Ubuntu, install with "sudo apt-get install xclip"') |
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216 setPasteBuffer = get_paste_buffer |
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217 writeToPasteBuffer = get_paste_buffer |
| 230 | 218 |
| 219 pyparsing.ParserElement.setDefaultWhitespaceChars(' \t') | |
| 220 | |
| 221 class ParsedString(str): | |
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222 def full_parsed_statement(self): |
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223 new = ParsedString('%s %s' % (self.parsed.command, self.parsed.args)) |
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224 new.parsed = self.parsed |
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225 new.parser = self.parser |
| 301 | 226 return new |
| 227 def with_args_replaced(self, newargs): | |
| 228 new = ParsedString(newargs) | |
| 229 new.parsed = self.parsed | |
| 230 new.parser = self.parser | |
| 231 new.parsed['args'] = newargs | |
| 232 new.parsed.statement['args'] = newargs | |
| 233 return new | |
| 230 | 234 |
| 235 class SkipToLast(pyparsing.SkipTo): | |
| 236 def parseImpl( self, instring, loc, doActions=True ): | |
| 237 resultStore = [] | |
| 238 startLoc = loc | |
| 239 instrlen = len(instring) | |
| 240 expr = self.expr | |
| 241 failParse = False | |
| 242 while loc <= instrlen: | |
| 243 try: | |
| 244 if self.failOn: | |
| 245 failParse = True | |
| 246 self.failOn.tryParse(instring, loc) | |
| 247 failParse = False | |
| 248 loc = expr._skipIgnorables( instring, loc ) | |
| 249 expr._parse( instring, loc, doActions=False, callPreParse=False ) | |
| 250 skipText = instring[startLoc:loc] | |
| 251 if self.includeMatch: | |
| 252 loc,mat = expr._parse(instring,loc,doActions,callPreParse=False) | |
| 253 if mat: | |
| 254 skipRes = ParseResults( skipText ) | |
| 255 skipRes += mat | |
| 256 resultStore.append((loc, [ skipRes ])) | |
| 257 else: | |
| 258 resultStore,append((loc, [ skipText ])) | |
| 259 else: | |
| 260 resultStore.append((loc, [ skipText ])) | |
| 261 loc += 1 | |
| 262 except (pyparsing.ParseException,IndexError): | |
| 263 if failParse: | |
| 264 raise | |
| 265 else: | |
| 266 loc += 1 | |
| 267 if resultStore: | |
| 268 return resultStore[-1] | |
| 269 else: | |
| 270 exc = self.myException | |
| 271 exc.loc = loc | |
| 272 exc.pstr = instring | |
| 273 raise exc | |
| 274 | |
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275 class StubbornDict(dict): |
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276 '''Dictionary that tolerates many input formats. |
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277 Create it with stubbornDict(arg) factory function. |
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278 |
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279 >>> d = StubbornDict(large='gross', small='klein') |
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280 >>> sorted(d.items()) |
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281 [('large', 'gross'), ('small', 'klein')] |
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282 >>> d.append(['plain', ' plaid']) |
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283 >>> sorted(d.items()) |
| 333 | 284 [('large', 'gross'), ('plaid', ''), ('plain', ''), ('small', 'klein')] |
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285 >>> d += ' girl Frauelein, Maedchen\\n\\n shoe schuh' |
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286 >>> sorted(d.items()) |
| 333 | 287 [('girl', 'Frauelein, Maedchen'), ('large', 'gross'), ('plaid', ''), ('plain', ''), ('shoe', 'schuh'), ('small', 'klein')] |
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288 ''' |
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289 def update(self, arg): |
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290 dict.update(self, StubbornDict.to_dict(arg)) |
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291 append = update |
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292 def __iadd__(self, arg): |
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293 self.update(arg) |
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294 return self |
| 323 | 295 def __add__(self, arg): |
| 296 selfcopy = copy.copy(self) | |
| 297 selfcopy.update(stubbornDict(arg)) | |
| 298 return selfcopy | |
| 299 def __radd__(self, arg): | |
| 300 selfcopy = copy.copy(self) | |
| 301 selfcopy.update(stubbornDict(arg)) | |
| 302 return selfcopy | |
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303 |
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304 @classmethod |
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305 def to_dict(cls, arg): |
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306 'Generates dictionary from string or list of strings' |
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307 if hasattr(arg, 'splitlines'): |
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308 arg = arg.splitlines() |
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309 if hasattr(arg, '__getslice__'): |
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310 result = {} |
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311 for a in arg: |
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312 a = a.strip() |
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313 if a: |
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314 key_val = a.split(None, 1) |
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315 key = key_val[0] |
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316 if len(key_val) > 1: |
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317 val = key_val[1] |
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318 else: |
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319 val = '' |
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320 result[key] = val |
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321 else: |
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322 result = arg |
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323 return result |
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324 |
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325 def stubbornDict(*arg, **kwarg): |
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326 ''' |
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327 >>> sorted(stubbornDict('cow a bovine\\nhorse an equine').items()) |
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328 [('cow', 'a bovine'), ('horse', 'an equine')] |
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329 >>> sorted(stubbornDict(['badger', 'porcupine a poky creature']).items()) |
| 333 | 330 [('badger', ''), ('porcupine', 'a poky creature')] |
|
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331 >>> sorted(stubbornDict(turtle='has shell', frog='jumpy').items()) |
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332 [('frog', 'jumpy'), ('turtle', 'has shell')] |
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333 ''' |
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334 result = {} |
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335 for a in arg: |
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336 result.update(StubbornDict.to_dict(a)) |
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337 result.update(kwarg) |
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338 return StubbornDict(result) |
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339 |
| 230 | 340 def replace_with_file_contents(fname): |
| 341 if fname: | |
| 342 try: | |
| 343 result = open(os.path.expanduser(fname[0])).read() | |
| 344 except IOError: | |
| 345 result = '< %s' % fname[0] # wasn't a file after all | |
| 346 else: | |
|
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347 result = get_paste_buffer() |
| 233 | 348 return result |
| 349 | |
| 234 | 350 class EmbeddedConsoleExit(Exception): |
| 351 pass | |
| 352 | |
|
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353 class MyInteractiveConsole(InteractiveConsole): |
| 234 | 354 def runcode(self, code): |
| 355 """Execute a code object. | |
| 356 | |
| 357 When an exception occurs, self.showtraceback() is called to | |
| 358 display a traceback. All exceptions are caught except | |
| 359 SystemExit, which is reraised. | |
| 360 | |
| 361 A note about KeyboardInterrupt: this exception may occur | |
| 362 elsewhere in this code, and may not always be caught. The | |
| 363 caller should be prepared to deal with it. | |
| 364 | |
| 365 Copied directly from code.InteractiveInterpreter, except for | |
| 366 EmbeddedConsoleExit exceptions. | |
| 367 """ | |
| 368 try: | |
| 369 exec code in self.locals | |
| 370 except (SystemExit, EmbeddedConsoleExit): | |
| 371 raise | |
| 372 except: | |
| 373 self.showtraceback() | |
| 374 else: | |
|
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375 if softspace(sys.stdout, 0): |
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376 print () |
| 234 | 377 |
| 290 | 378 def ljust(x, width, fillchar=' '): |
| 379 'analogous to str.ljust, but works for lists' | |
| 380 if hasattr(x, 'ljust'): | |
| 381 return x.ljust(width, fillchar) | |
| 382 else: | |
| 383 if len(x) < width: | |
| 384 x = (x + [fillchar] * width)[:width] | |
| 385 return x | |
| 386 | |
| 230 | 387 class Cmd(cmd.Cmd): |
| 388 echo = False | |
| 286 | 389 case_insensitive = True # Commands recognized regardless of case |
| 230 | 390 continuation_prompt = '> ' |
| 286 | 391 timing = False # Prints elapsed time for each command |
| 392 # make sure your terminators are not in legalChars! | |
| 393 legalChars = '!#$%.:?@_' + pyparsing.alphanums + pyparsing.alphas8bit | |
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394 shortcuts = {'?': 'help', '!': 'shell', '@': 'load', '@@': '_relative_load'} |
| 230 | 395 excludeFromHistory = '''run r list l history hi ed edit li eof'''.split() |
| 331 | 396 default_to_shell = False |
| 230 | 397 noSpecialParse = 'set ed edit exit'.split() |
| 286 | 398 defaultExtension = 'txt' # For ``save``, ``load``, etc. |
| 399 default_file_name = 'command.txt' # For ``save``, ``load``, etc. | |
|
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400 abbrev = True # Abbreviated commands recognized |
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401 current_script_dir = None |
| 245 | 402 reserved_words = [] |
|
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403 feedback_to_output = False # Do include nonessentials in >, | output |
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404 quiet = False # Do not suppress nonessential output |
| 324 | 405 debug = False |
| 328 | 406 locals_in_py = False |
|
320
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407 settable = stubbornDict(''' |
| 290 | 408 prompt |
| 312 | 409 colors Colorized output (*nix only) |
| 331 | 410 continuation_prompt On 2nd+ line of input |
| 411 debug Show full error stack on error | |
| 412 default_file_name for ``save``, ``load``, etc. | |
| 413 editor Program used by ``edit`` | |
| 290 | 414 case_insensitive upper- and lower-case both OK |
| 415 feedback_to_output include nonessentials in `|`, `>` results | |
| 331 | 416 quiet Don't print nonessential feedback |
| 290 | 417 echo Echo command issued into output |
| 418 timing Report execution times | |
| 419 abbrev Accept abbreviated commands | |
|
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420 ''') |
| 230 | 421 |
|
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422 def poutput(self, msg): |
| 284 | 423 if msg: |
| 424 self.stdout.write(msg) | |
| 425 if msg[-1] != '\n': | |
| 426 self.stdout.write('\n') | |
| 276 | 427 def perror(self, errmsg, statement=None): |
| 282 | 428 if self.debug: |
| 429 traceback.print_exc() | |
|
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430 print str(errmsg) |
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431 def pfeedback(self, msg): |
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432 """For printing nonessential feedback. Can be silenced with `quiet`. |
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433 Inclusion in redirected output is controlled by `feedback_to_output`.""" |
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434 if not self.quiet: |
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435 if self.feedback_to_output: |
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436 self.poutput(msg) |
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437 else: |
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438 print (msg) |
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439 _STOP_AND_EXIT = 2 |
| 230 | 440 editor = os.environ.get('EDITOR') |
| 441 if not editor: | |
| 442 if sys.platform[:3] == 'win': | |
| 443 editor = 'notepad' | |
| 444 else: | |
| 445 for editor in ['gedit', 'kate', 'vim', 'emacs', 'nano', 'pico']: | |
| 446 if not os.system('which %s' % (editor)): | |
| 447 break | |
| 312 | 448 |
| 449 colorcodes = {'bold':{True:'\x1b[1m',False:'\x1b[22m'}, | |
| 450 'cyan':{True:'\x1b[36m',False:'\x1b[39m'}, | |
| 451 'blue':{True:'\x1b[34m',False:'\x1b[39m'}, | |
| 452 'red':{True:'\x1b[31m',False:'\x1b[39m'}, | |
| 453 'magenta':{True:'\x1b[35m',False:'\x1b[39m'}, | |
| 454 'green':{True:'\x1b[32m',False:'\x1b[39m'}, | |
| 455 'underline':{True:'\x1b[4m',False:'\x1b[24m'}} | |
| 456 colors = (platform.system() != 'Windows') | |
| 457 def colorize(self, val, color): | |
| 458 '''Wraps `val` in `color` markers (one of: red/blue/green/cyan/magenta, bold, underline), | |
| 459 but only if `colors` environment variable is True''' | |
| 460 if self.colors and (self.stdout == self.initial_stdout): | |
| 461 return self.colorcodes[color][True] + val + self.colorcodes[color][False] | |
| 462 return val | |
| 463 | |
| 230 | 464 def do_cmdenvironment(self, args): |
| 465 '''Summary report of interactive parameters.''' | |
| 466 self.stdout.write(""" | |
| 467 Commands are %(casesensitive)scase-sensitive. | |
| 468 Commands may be terminated with: %(terminators)s | |
| 237 | 469 Settable parameters: %(settable)s\n""" % \ |
| 230 | 470 { 'casesensitive': (self.case_insensitive and 'not ') or '', |
| 471 'terminators': str(self.terminators), | |
| 472 'settable': ' '.join(self.settable) | |
| 473 }) | |
| 474 | |
| 475 def do_help(self, arg): | |
|
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476 if arg: |
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477 funcname = self.func_named(arg) |
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478 if funcname: |
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479 fn = getattr(self, funcname) |
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480 try: |
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481 fn.optionParser.print_help(file=self.stdout) |
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482 except AttributeError: |
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483 cmd.Cmd.do_help(self, funcname[3:]) |
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484 else: |
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485 cmd.Cmd.do_help(self, arg) |
| 230 | 486 |
| 487 def __init__(self, *args, **kwargs): | |
| 488 cmd.Cmd.__init__(self, *args, **kwargs) | |
| 271 | 489 self.initial_stdout = sys.stdout |
| 230 | 490 self.history = History() |
| 491 self._init_parser() | |
| 492 self.pystate = {} | |
|
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493 self.shortcuts = sorted(self.shortcuts.items(), reverse=True) |
|
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494 self.keywords = self.reserved_words + [fname[3:] for fname in dir(self) |
| 290 | 495 if fname.startswith('do_')] |
| 317 | 496 def linelist(arg): |
| 497 result = [] | |
| 498 | |
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499 self.doubleDashComment = pyparsing.NotAny(pyparsing.Or(options_defined)) + pyparsing.Literal('--') + pyparsing.restOfLine |
| 290 | 500 |
| 230 | 501 def do_shortcuts(self, args): |
| 502 """Lists single-key shortcuts available.""" | |
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503 result = "\n".join('%s: %s' % (sc[0], sc[1]) for sc in sorted(self.shortcuts)) |
| 230 | 504 self.stdout.write("Single-key shortcuts for other commands:\n%s\n" % (result)) |
| 505 | |
| 506 prefixParser = pyparsing.Empty() | |
| 507 commentGrammars = pyparsing.Or([pyparsing.pythonStyleComment, pyparsing.cStyleComment]) | |
| 508 commentGrammars.addParseAction(lambda x: '') | |
|
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509 commentInProgress = pyparsing.Literal('/*') + pyparsing.SkipTo( |
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510 pyparsing.stringEnd ^ '*/') |
| 230 | 511 terminators = [';'] |
| 512 blankLinesAllowed = False | |
| 513 multilineCommands = [] | |
| 514 | |
| 515 def _init_parser(self): | |
| 516 r''' | |
| 517 >>> c = Cmd() | |
| 518 >>> c.multilineCommands = ['multiline'] | |
| 519 >>> c.case_insensitive = True | |
| 520 >>> c._init_parser() | |
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521 >>> print (c.parser.parseString('').dump()) |
| 313 | 522 [] |
| 523 >>> print (c.parser.parseString('').dump()) | |
| 230 | 524 [] |
|
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525 >>> print (c.parser.parseString('/* empty command */').dump()) |
| 230 | 526 [] |
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527 >>> print (c.parser.parseString('plainword').dump()) |
| 230 | 528 ['plainword', ''] |
| 529 - command: plainword | |
| 530 - statement: ['plainword', ''] | |
| 531 - command: plainword | |
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532 >>> print (c.parser.parseString('termbare;').dump()) |
| 230 | 533 ['termbare', '', ';', ''] |
| 534 - command: termbare | |
| 535 - statement: ['termbare', '', ';'] | |
| 536 - command: termbare | |
| 537 - terminator: ; | |
| 538 - terminator: ; | |
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539 >>> print (c.parser.parseString('termbare; suffx').dump()) |
| 230 | 540 ['termbare', '', ';', 'suffx'] |
| 541 - command: termbare | |
| 542 - statement: ['termbare', '', ';'] | |
| 543 - command: termbare | |
| 544 - terminator: ; | |
| 545 - suffix: suffx | |
| 546 - terminator: ; | |
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547 >>> print (c.parser.parseString('barecommand').dump()) |
| 230 | 548 ['barecommand', ''] |
| 549 - command: barecommand | |
| 550 - statement: ['barecommand', ''] | |
| 551 - command: barecommand | |
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552 >>> print (c.parser.parseString('COMmand with args').dump()) |
| 230 | 553 ['command', 'with args'] |
| 554 - args: with args | |
| 555 - command: command | |
| 556 - statement: ['command', 'with args'] | |
| 557 - args: with args | |
| 558 - command: command | |
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559 >>> print (c.parser.parseString('command with args and terminator; and suffix').dump()) |
| 230 | 560 ['command', 'with args and terminator', ';', 'and suffix'] |
| 561 - args: with args and terminator | |
| 562 - command: command | |
| 563 - statement: ['command', 'with args and terminator', ';'] | |
| 564 - args: with args and terminator | |
| 565 - command: command | |
| 566 - terminator: ; | |
| 567 - suffix: and suffix | |
| 568 - terminator: ; | |
|
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569 >>> print (c.parser.parseString('simple | piped').dump()) |
| 230 | 570 ['simple', '', '|', ' piped'] |
| 571 - command: simple | |
| 572 - pipeTo: piped | |
| 573 - statement: ['simple', ''] | |
| 574 - command: simple | |
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575 >>> print (c.parser.parseString('double-pipe || is not a pipe').dump()) |
| 230 | 576 ['double', '-pipe || is not a pipe'] |
| 577 - args: -pipe || is not a pipe | |
| 578 - command: double | |
| 579 - statement: ['double', '-pipe || is not a pipe'] | |
| 580 - args: -pipe || is not a pipe | |
| 581 - command: double | |
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582 >>> print (c.parser.parseString('command with args, terminator;sufx | piped').dump()) |
| 230 | 583 ['command', 'with args, terminator', ';', 'sufx', '|', ' piped'] |
| 584 - args: with args, terminator | |
| 585 - command: command | |
| 586 - pipeTo: piped | |
| 587 - statement: ['command', 'with args, terminator', ';'] | |
| 588 - args: with args, terminator | |
| 589 - command: command | |
| 590 - terminator: ; | |
| 591 - suffix: sufx | |
| 592 - terminator: ; | |
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593 >>> print (c.parser.parseString('output into > afile.txt').dump()) |
| 230 | 594 ['output', 'into', '>', 'afile.txt'] |
| 595 - args: into | |
| 596 - command: output | |
| 597 - output: > | |
| 598 - outputTo: afile.txt | |
| 599 - statement: ['output', 'into'] | |
| 600 - args: into | |
| 601 - command: output | |
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602 >>> print (c.parser.parseString('output into;sufx | pipethrume plz > afile.txt').dump()) |
| 230 | 603 ['output', 'into', ';', 'sufx', '|', ' pipethrume plz', '>', 'afile.txt'] |
| 604 - args: into | |
| 605 - command: output | |
| 606 - output: > | |
| 607 - outputTo: afile.txt | |
| 608 - pipeTo: pipethrume plz | |
| 609 - statement: ['output', 'into', ';'] | |
| 610 - args: into | |
| 611 - command: output | |
| 612 - terminator: ; | |
| 613 - suffix: sufx | |
| 614 - terminator: ; | |
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615 >>> print (c.parser.parseString('output to paste buffer >> ').dump()) |
| 230 | 616 ['output', 'to paste buffer', '>>', ''] |
| 617 - args: to paste buffer | |
| 618 - command: output | |
| 619 - output: >> | |
| 620 - statement: ['output', 'to paste buffer'] | |
| 621 - args: to paste buffer | |
| 622 - command: output | |
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623 >>> print (c.parser.parseString('ignore the /* commented | > */ stuff;').dump()) |
| 230 | 624 ['ignore', 'the /* commented | > */ stuff', ';', ''] |
| 625 - args: the /* commented | > */ stuff | |
| 626 - command: ignore | |
| 627 - statement: ['ignore', 'the /* commented | > */ stuff', ';'] | |
| 628 - args: the /* commented | > */ stuff | |
| 629 - command: ignore | |
| 630 - terminator: ; | |
| 631 - terminator: ; | |
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632 >>> print (c.parser.parseString('has > inside;').dump()) |
| 230 | 633 ['has', '> inside', ';', ''] |
| 634 - args: > inside | |
| 635 - command: has | |
| 636 - statement: ['has', '> inside', ';'] | |
| 637 - args: > inside | |
| 638 - command: has | |
| 639 - terminator: ; | |
| 640 - terminator: ; | |
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641 >>> print (c.parser.parseString('multiline has > inside an unfinished command').dump()) |
| 230 | 642 ['multiline', ' has > inside an unfinished command'] |
| 643 - multilineCommand: multiline | |
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644 >>> print (c.parser.parseString('multiline has > inside;').dump()) |
| 230 | 645 ['multiline', 'has > inside', ';', ''] |
| 646 - args: has > inside | |
| 647 - multilineCommand: multiline | |
| 648 - statement: ['multiline', 'has > inside', ';'] | |
| 649 - args: has > inside | |
| 650 - multilineCommand: multiline | |
| 651 - terminator: ; | |
| 652 - terminator: ; | |
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653 >>> print (c.parser.parseString('multiline command /* with comment in progress;').dump()) |
| 272 | 654 ['multiline', ' command'] |
| 655 - multilineCommand: multiline | |
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656 >>> print (c.parser.parseString('multiline command /* with comment complete */ is done;').dump()) |
| 230 | 657 ['multiline', 'command /* with comment complete */ is done', ';', ''] |
| 658 - args: command /* with comment complete */ is done | |
| 659 - multilineCommand: multiline | |
| 660 - statement: ['multiline', 'command /* with comment complete */ is done', ';'] | |
| 661 - args: command /* with comment complete */ is done | |
| 662 - multilineCommand: multiline | |
| 663 - terminator: ; | |
| 664 - terminator: ; | |
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665 >>> print (c.parser.parseString('multiline command ends\n\n').dump()) |
| 230 | 666 ['multiline', 'command ends', '\n', '\n'] |
| 667 - args: command ends | |
| 668 - multilineCommand: multiline | |
| 669 - statement: ['multiline', 'command ends', '\n', '\n'] | |
| 670 - args: command ends | |
| 671 - multilineCommand: multiline | |
| 672 - terminator: ['\n', '\n'] | |
| 673 - terminator: ['\n', '\n'] | |
| 674 ''' | |
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675 tstr = 'multiline command /* with comment complete */ is done;' |
| 230 | 676 outputParser = (pyparsing.Literal('>>') | (pyparsing.WordStart() + '>') | pyparsing.Regex('[^=]>'))('output') |
| 677 | |
| 678 terminatorParser = pyparsing.Or([(hasattr(t, 'parseString') and t) or pyparsing.Literal(t) for t in self.terminators])('terminator') | |
| 679 stringEnd = pyparsing.stringEnd ^ '\nEOF' | |
| 680 self.multilineCommand = pyparsing.Or([pyparsing.Keyword(c, caseless=self.case_insensitive) for c in self.multilineCommands])('multilineCommand') | |
| 681 oneLineCommand = (~self.multilineCommand + pyparsing.Word(self.legalChars))('command') | |
| 682 pipe = pyparsing.Keyword('|', identChars='|') | |
| 285 | 683 self.commentGrammars.ignore(pyparsing.quotedString).setParseAction(lambda x: '') |
| 230 | 684 afterElements = \ |
| 685 pyparsing.Optional(pipe + pyparsing.SkipTo(outputParser ^ stringEnd)('pipeTo')) + \ | |
| 686 pyparsing.Optional(outputParser + pyparsing.SkipTo(stringEnd).setParseAction(lambda x: x[0].strip())('outputTo')) | |
| 687 if self.case_insensitive: | |
| 688 self.multilineCommand.setParseAction(lambda x: x[0].lower()) | |
| 689 oneLineCommand.setParseAction(lambda x: x[0].lower()) | |
| 690 if self.blankLinesAllowed: | |
| 691 self.blankLineTerminationParser = pyparsing.NoMatch | |
| 692 else: | |
| 693 self.blankLineTerminator = (pyparsing.lineEnd + pyparsing.lineEnd)('terminator') | |
| 694 self.blankLineTerminator.setResultsName('terminator') | |
| 695 self.blankLineTerminationParser = ((self.multilineCommand ^ oneLineCommand) + pyparsing.SkipTo(self.blankLineTerminator).setParseAction(lambda x: x[0].strip())('args') + self.blankLineTerminator)('statement') | |
| 696 self.multilineParser = (((self.multilineCommand ^ oneLineCommand) + SkipToLast(terminatorParser).setParseAction(lambda x: x[0].strip())('args') + terminatorParser)('statement') + | |
| 697 pyparsing.SkipTo(outputParser ^ pipe ^ stringEnd).setParseAction(lambda x: x[0].strip())('suffix') + afterElements) | |
| 250 | 698 self.multilineParser.ignore(self.commentInProgress) |
| 230 | 699 self.singleLineParser = ((oneLineCommand + pyparsing.SkipTo(terminatorParser ^ stringEnd ^ pipe ^ outputParser).setParseAction(lambda x:x[0].strip())('args'))('statement') + |
| 700 pyparsing.Optional(terminatorParser) + afterElements) | |
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701 #self.multilineParser = self.multilineParser.setResultsName('multilineParser') |
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702 #self.singleLineParser = self.singleLineParser.setResultsName('singleLineParser') |
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703 self.blankLineTerminationParser = self.blankLineTerminationParser.setResultsName('statement') |
|
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704 self.parser = self.prefixParser + ( |
| 230 | 705 stringEnd | |
|
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706 self.multilineParser | |
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707 self.singleLineParser | |
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708 self.blankLineTerminationParser | |
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709 self.multilineCommand + pyparsing.SkipTo(stringEnd) |
| 230 | 710 ) |
|
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711 self.parser.ignore(pyparsing.quotedString).ignore(self.commentGrammars) |
| 230 | 712 |
| 713 inputMark = pyparsing.Literal('<') | |
| 714 inputMark.setParseAction(lambda x: '') | |
| 715 fileName = pyparsing.Word(self.legalChars + '/\\') | |
| 716 inputFrom = fileName('inputFrom') | |
| 717 inputFrom.setParseAction(replace_with_file_contents) | |
| 718 # a not-entirely-satisfactory way of distinguishing < as in "import from" from < | |
| 719 # as in "lesser than" | |
| 720 self.inputParser = inputMark + pyparsing.Optional(inputFrom) + pyparsing.Optional('>') + \ | |
| 721 pyparsing.Optional(fileName) + (pyparsing.stringEnd | '|') | |
| 722 self.inputParser.ignore(pyparsing.quotedString).ignore(self.commentGrammars).ignore(self.commentInProgress) | |
| 723 | |
| 724 def preparse(self, raw, **kwargs): | |
| 725 return raw | |
| 726 | |
| 727 def parsed(self, raw, **kwargs): | |
| 728 if isinstance(raw, ParsedString): | |
| 729 p = raw | |
| 730 else: | |
| 292 | 731 # preparse is an overridable hook; default makes no changes |
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732 s = self.preparse(raw, **kwargs) |
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733 s = self.inputParser.transformString(s.lstrip()) |
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734 s = self.commentGrammars.transformString(s) |
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735 for (shortcut, expansion) in self.shortcuts: |
| 230 | 736 if s.lower().startswith(shortcut): |
| 737 s = s.replace(shortcut, expansion + ' ', 1) | |
| 738 break | |
| 739 result = self.parser.parseString(s) | |
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740 result['raw'] = raw |
| 230 | 741 result['command'] = result.multilineCommand or result.command |
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742 p = ParsedString(result.args) |
| 230 | 743 p.parsed = result |
| 295 | 744 p.parser = self.parsed |
| 230 | 745 for (key, val) in kwargs.items(): |
| 746 p.parsed[key] = val | |
| 747 return p | |
| 748 | |
| 749 def postparsing_precmd(self, statement): | |
| 750 stop = 0 | |
| 751 return stop, statement | |
|
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752 |
| 230 | 753 def postparsing_postcmd(self, stop): |
| 754 return stop | |
|
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755 def func_named(self, arg): |
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756 result = None |
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757 target = 'do_' + arg |
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758 if target in dir(self): |
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759 result = target |
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760 else: |
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761 if self.abbrev: # accept shortened versions of commands |
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762 funcs = [fname for fname in self.keywords if fname.startswith(arg)] |
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763 if len(funcs) == 1: |
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764 result = 'do_' + funcs[0] |
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765 return result |
| 230 | 766 def onecmd(self, line): |
| 767 """Interpret the argument as though it had been typed in response | |
| 768 to the prompt. | |
| 769 | |
| 770 This may be overridden, but should not normally need to be; | |
| 771 see the precmd() and postcmd() methods for useful execution hooks. | |
| 772 The return value is a flag indicating whether interpretation of | |
| 773 commands by the interpreter should stop. | |
| 774 | |
| 775 This (`cmd2`) version of `onecmd` already override's `cmd`'s `onecmd`. | |
| 776 | |
| 777 """ | |
| 778 if not line: | |
| 779 return self.emptyline() | |
| 780 if not pyparsing.Or(self.commentGrammars).setParseAction(lambda x: '').transformString(line): | |
| 781 return 0 # command was empty except for comments | |
| 782 try: | |
| 783 statement = self.parsed(line) | |
| 784 while statement.parsed.multilineCommand and (statement.parsed.terminator == ''): | |
| 785 statement = '%s\n%s' % (statement.parsed.raw, | |
| 786 self.pseudo_raw_input(self.continuation_prompt)) | |
| 787 statement = self.parsed(statement) | |
| 788 except Exception, e: | |
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789 self.perror(e) |
| 230 | 790 return 0 |
| 246 | 791 if statement.parsed.command not in self.excludeFromHistory: |
| 792 self.history.append(statement.parsed.raw) | |
| 230 | 793 try: |
| 794 (stop, statement) = self.postparsing_precmd(statement) | |
| 795 except Exception, e: | |
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796 self.perror(e) |
| 230 | 797 return 0 |
| 798 if stop: | |
| 799 return self.postparsing_postcmd(stop) | |
| 800 | |
| 801 if not statement.parsed.command: | |
| 802 return self.postparsing_postcmd(stop=0) | |
| 803 | |
| 804 statekeeper = None | |
| 805 | |
| 806 if statement.parsed.pipeTo: | |
| 807 redirect = subprocess.Popen(statement.parsed.pipeTo, shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 808 statekeeper = Statekeeper(self, ('stdout',)) | |
| 809 self.stdout = redirect.stdin | |
| 810 elif statement.parsed.output: | |
| 811 statekeeper = Statekeeper(self, ('stdout',)) | |
| 812 if statement.parsed.outputTo: | |
| 813 mode = 'w' | |
| 814 if statement.parsed.output == '>>': | |
| 815 mode = 'a' | |
| 816 try: | |
| 817 self.stdout = open(os.path.expanduser(statement.parsed.outputTo), mode) | |
| 282 | 818 except Exception, e: |
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819 self.perror(e) |
| 230 | 820 return self.postparsing_postcmd(stop=0) |
| 821 else: | |
| 822 statekeeper = Statekeeper(self, ('stdout',)) | |
| 823 self.stdout = tempfile.TemporaryFile() | |
| 824 if statement.parsed.output == '>>': | |
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825 self.stdout.write(get_paste_buffer()) |
| 230 | 826 try: |
| 251 | 827 try: |
| 292 | 828 # "heart" of the command, replaces cmd's onecmd() |
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829 self.lastcmd = statement.parsed.raw |
| 275 | 830 funcname = self.func_named(statement.parsed.command) |
| 831 if not funcname: | |
| 330 | 832 return self._default(statement) |
| 275 | 833 try: |
| 834 func = getattr(self, funcname) | |
| 835 except AttributeError: | |
| 330 | 836 return self._default(statement) |
| 275 | 837 timestart = datetime.datetime.now() |
| 838 stop = func(statement) | |
| 839 if self.timing: | |
| 840 self.pfeedback('Elapsed: %s' % str(datetime.datetime.now() - timestart)) | |
| 841 except Exception, e: | |
| 276 | 842 self.perror(e, statement) |
| 230 | 843 finally: |
| 844 if statekeeper: | |
| 845 if statement.parsed.output and not statement.parsed.outputTo: | |
| 846 self.stdout.seek(0) | |
| 847 try: | |
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848 write_to_paste_buffer(self.stdout.read()) |
| 230 | 849 except Exception, e: |
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850 self.perror(e) |
| 230 | 851 elif statement.parsed.pipeTo: |
| 852 for result in redirect.communicate(): | |
| 853 statekeeper.stdout.write(result or '') | |
| 854 self.stdout.close() | |
| 855 statekeeper.restore() | |
| 856 | |
| 857 return self.postparsing_postcmd(stop) | |
| 858 | |
| 330 | 859 def _default(self, statement): |
| 860 arg = statement.full_parsed_statement() | |
| 861 if self.default_to_shell: | |
| 862 result = os.system(arg) | |
| 863 if not result: | |
| 864 return self.postparsing_postcmd(None) | |
| 865 return self.postparsing_postcmd(self.default(arg)) | |
| 866 | |
| 230 | 867 def pseudo_raw_input(self, prompt): |
| 868 """copied from cmd's cmdloop; like raw_input, but accounts for changed stdin, stdout""" | |
| 869 | |
| 870 if self.use_rawinput: | |
| 871 try: | |
| 872 line = raw_input(prompt) | |
| 873 except EOFError: | |
| 874 line = 'EOF' | |
| 875 else: | |
| 876 self.stdout.write(prompt) | |
| 877 self.stdout.flush() | |
| 878 line = self.stdin.readline() | |
| 879 if not len(line): | |
| 880 line = 'EOF' | |
| 881 else: | |
| 882 if line[-1] == '\n': # this was always true in Cmd | |
| 883 line = line[:-1] | |
| 884 return line | |
| 282 | 885 |
| 334 | 886 def _cmdloop(self, intro=None): |
| 230 | 887 """Repeatedly issue a prompt, accept input, parse an initial prefix |
| 888 off the received input, and dispatch to action methods, passing them | |
| 889 the remainder of the line as argument. | |
| 890 """ | |
| 891 | |
| 892 # An almost perfect copy from Cmd; however, the pseudo_raw_input portion | |
| 893 # has been split out so that it can be called separately | |
| 894 | |
| 895 self.preloop() | |
| 896 if self.use_rawinput and self.completekey: | |
| 897 try: | |
| 898 import readline | |
| 899 self.old_completer = readline.get_completer() | |
| 900 readline.set_completer(self.complete) | |
| 901 readline.parse_and_bind(self.completekey+": complete") | |
| 902 except ImportError: | |
| 903 pass | |
| 904 try: | |
| 905 if intro is not None: | |
| 906 self.intro = intro | |
| 907 if self.intro: | |
| 908 self.stdout.write(str(self.intro)+"\n") | |
| 909 stop = None | |
| 910 while not stop: | |
| 911 if self.cmdqueue: | |
| 912 line = self.cmdqueue.pop(0) | |
| 913 else: | |
| 914 line = self.pseudo_raw_input(self.prompt) | |
| 915 if (self.echo) and (isinstance(self.stdin, file)): | |
| 916 self.stdout.write(line + '\n') | |
| 917 line = self.precmd(line) | |
| 918 stop = self.onecmd(line) | |
| 919 stop = self.postcmd(stop, line) | |
| 920 self.postloop() | |
| 921 finally: | |
| 922 if self.use_rawinput and self.completekey: | |
| 923 try: | |
| 924 import readline | |
| 925 readline.set_completer(self.old_completer) | |
| 926 except ImportError: | |
| 927 pass | |
| 928 return stop | |
| 929 | |
| 930 def do_EOF(self, arg): | |
| 931 return True | |
| 932 do_eof = do_EOF | |
| 290 | 933 |
| 230 | 934 def do_quit(self, arg): |
| 935 return self._STOP_AND_EXIT | |
| 936 do_exit = do_quit | |
| 937 do_q = do_quit | |
| 938 | |
| 309 | 939 def select(self, options, prompt='Your choice? '): |
| 940 '''Presents a numbered menu to the user. Modelled after | |
| 310 | 941 the bash shell's SELECT. Returns the item chosen. |
| 942 | |
| 943 Argument ``options`` can be: | |
| 332 | 944 |
| 945 | a single string -> will be split into one-word options | |
| 946 | a list of strings -> will be offered as options | |
| 947 | a list of tuples -> interpreted as (value, text), so | |
| 948 that the return value can differ from | |
| 949 the text advertised to the user ''' | |
| 309 | 950 if isinstance(options, basestring): |
| 310 | 951 options = zip(options.split(), options.split()) |
| 952 fulloptions = [] | |
| 953 for opt in options: | |
| 954 if isinstance(opt, basestring): | |
| 955 fulloptions.append((opt, opt)) | |
| 956 else: | |
| 957 try: | |
| 958 fulloptions.append((opt[0], opt[1])) | |
| 959 except IndexError: | |
| 960 fulloptions.append((opt[0], opt[0])) | |
| 961 for (idx, (value, text)) in enumerate(fulloptions): | |
| 962 self.poutput(' %2d. %s\n' % (idx+1, text)) | |
| 309 | 963 while True: |
| 964 response = raw_input(prompt) | |
| 965 try: | |
| 966 response = int(response) | |
| 310 | 967 result = fulloptions[response - 1][0] |
| 309 | 968 break |
| 969 except ValueError: | |
| 970 pass # loop and ask again | |
| 971 return result | |
| 972 | |
| 290 | 973 @options([make_option('-l', '--long', action="store_true", |
| 974 help="describe function of parameter")]) | |
| 975 def do_show(self, arg, opts): | |
| 230 | 976 '''Shows value of a parameter.''' |
| 290 | 977 param = arg.strip().lower() |
| 978 result = {} | |
| 979 maxlen = 0 | |
| 980 for p in self.settable: | |
| 981 if (not param) or p.startswith(param): | |
| 982 result[p] = '%s: %s' % (p, str(getattr(self, p))) | |
| 983 maxlen = max(maxlen, len(result[p])) | |
| 984 if result: | |
| 985 for p in sorted(result): | |
| 986 if opts.long: | |
| 987 self.poutput('%s # %s' % (result[p].ljust(maxlen), self.settable[p])) | |
| 988 else: | |
| 989 self.poutput(result[p]) | |
| 230 | 990 else: |
| 290 | 991 self.perror("Parameter '%s' not supported (type 'show' for list of parameters)." % param) |
| 230 | 992 |
| 993 def do_set(self, arg): | |
| 290 | 994 ''' |
| 995 Sets a cmd2 parameter. Accepts abbreviated parameter names so long | |
| 996 as there is no ambiguity. Call without arguments for a list of | |
| 997 settable parameters with their values.''' | |
| 230 | 998 try: |
| 291 | 999 statement, paramName, val = arg.parsed.raw.split(None, 2) |
| 230 | 1000 paramName = paramName.strip().lower() |
| 290 | 1001 if paramName not in self.settable: |
| 291 | 1002 hits = [p for p in self.settable if p.startswith(paramName)] |
| 290 | 1003 if len(hits) == 1: |
| 1004 paramName = hits[0] | |
| 1005 else: | |
| 1006 return self.do_show(paramName) | |
| 1007 currentVal = getattr(self, paramName) | |
| 1008 if (val[0] == val[-1]) and val[0] in ("'", '"'): | |
| 1009 val = val[1:-1] | |
| 1010 else: | |
| 1011 val = cast(currentVal, val) | |
| 1012 setattr(self, paramName, val) | |
| 1013 self.stdout.write('%s - was: %s\nnow: %s\n' % (paramName, currentVal, val)) | |
| 1014 if currentVal != val: | |
| 1015 try: | |
| 1016 onchange_hook = getattr(self, '_onchange_%s' % paramName) | |
| 1017 onchange_hook(old=currentVal, new=val) | |
| 1018 except AttributeError: | |
| 1019 pass | |
| 230 | 1020 except (ValueError, AttributeError, NotSettableError), e: |
| 1021 self.do_show(arg) | |
| 1022 | |
| 1023 def do_pause(self, arg): | |
| 1024 'Displays the specified text then waits for the user to press RETURN.' | |
| 1025 raw_input(arg + '\n') | |
| 1026 | |
| 1027 def do_shell(self, arg): | |
| 1028 'execute a command as if at the OS prompt.' | |
| 1029 os.system(arg) | |
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1030 |
| 233 | 1031 def do_py(self, arg): |
| 230 | 1032 ''' |
| 1033 py <command>: Executes a Python command. | |
| 242 | 1034 py: Enters interactive Python mode. |
| 1035 End with `Ctrl-D` (Unix) / `Ctrl-Z` (Windows), `quit()`, 'exit()`. | |
| 241 | 1036 Non-python commands can be issued with `cmd("your command")`. |
| 230 | 1037 ''' |
| 280 | 1038 self.pystate['self'] = self |
| 274 | 1039 arg = arg.parsed.raw[2:].strip() |
| 230 | 1040 if arg.strip(): |
|
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1041 interp = InteractiveInterpreter(locals=self.pystate) |
| 233 | 1042 interp.runcode(arg) |
| 230 | 1043 else: |
| 328 | 1044 localvars = (self.locals_in_py and self.pystate) or {} |
| 1045 interp = MyInteractiveConsole(locals=localvars) | |
| 233 | 1046 def quit(): |
| 328 | 1047 'blah' |
| 234 | 1048 raise EmbeddedConsoleExit |
| 236 | 1049 def onecmd(arg): |
| 1050 return self.onecmd(arg + '\n') | |
| 233 | 1051 self.pystate['quit'] = quit |
| 1052 self.pystate['exit'] = quit | |
| 328 | 1053 self.pystate['cmd'] = onecmd |
| 234 | 1054 try: |
| 240 | 1055 cprt = 'Type "help", "copyright", "credits" or "license" for more information.' |
|
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1056 keepstate = Statekeeper(sys, ('stdin','stdout')) |
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1057 sys.stdout = self.stdout |
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1058 sys.stdin = self.stdin |
| 240 | 1059 interp.interact(banner= "Python %s on %s\n%s\n(%s)\n%s" % |
| 1060 (sys.version, sys.platform, cprt, self.__class__.__name__, self.do_py.__doc__)) | |
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1061 except EmbeddedConsoleExit: |
| 245 | 1062 pass |
| 1063 keepstate.restore() | |
| 233 | 1064 |
| 230 | 1065 def do_history(self, arg): |
| 1066 """history [arg]: lists past commands issued | |
| 1067 | |
| 314 | 1068 | no arg: list all |
| 1069 | arg is integer: list one history item, by index | |
| 1070 | arg is string: string search | |
| 1071 | arg is /enclosed in forward-slashes/: regular expression search | |
| 230 | 1072 """ |
| 1073 if arg: | |
| 1074 history = self.history.get(arg) | |
| 1075 else: | |
| 1076 history = self.history | |
| 1077 for hi in history: | |
| 1078 self.stdout.write(hi.pr()) | |
| 1079 def last_matching(self, arg): | |
| 1080 try: | |
| 1081 if arg: | |
| 1082 return self.history.get(arg)[-1] | |
| 1083 else: | |
| 1084 return self.history[-1] | |
| 1085 except IndexError: | |
| 1086 return None | |
| 1087 def do_list(self, arg): | |
| 1088 """list [arg]: lists last command issued | |
| 1089 | |
| 307 | 1090 no arg -> list most recent command |
| 230 | 1091 arg is integer -> list one history item, by index |
| 307 | 1092 a..b, a:b, a:, ..b -> list spans from a (or start) to b (or end) |
| 308 | 1093 arg is string -> list all commands matching string search |
| 230 | 1094 arg is /enclosed in forward-slashes/ -> regular expression search |
| 1095 """ | |
| 1096 try: | |
| 308 | 1097 history = self.history.span(arg or '-1') |
| 1098 except IndexError: | |
| 1099 history = self.history.search(arg) | |
| 1100 for hi in history: | |
| 1101 self.poutput(hi.pr()) | |
| 1102 | |
| 230 | 1103 do_hi = do_history |
| 1104 do_l = do_list | |
| 1105 do_li = do_list | |
| 1106 | |
| 1107 def do_ed(self, arg): | |
| 1108 """ed: edit most recent command in text editor | |
| 1109 ed [N]: edit numbered command from history | |
| 1110 ed [filename]: edit specified file name | |
| 1111 | |
| 1112 commands are run after editor is closed. | |
| 1113 "set edit (program-name)" or set EDITOR environment variable | |
| 1114 to control which editing program is used.""" | |
| 1115 if not self.editor: | |
|
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1116 self.perror("Please use 'set editor' to specify your text editing program of choice.") |
| 230 | 1117 return |
| 1118 filename = self.default_file_name | |
| 1119 if arg: | |
| 1120 try: | |
| 1121 buffer = self.last_matching(int(arg)) | |
| 1122 except ValueError: | |
| 1123 filename = arg | |
| 1124 buffer = '' | |
| 1125 else: | |
| 1126 buffer = self.history[-1] | |
| 1127 | |
| 1128 if buffer: | |
| 1129 f = open(os.path.expanduser(filename), 'w') | |
| 1130 f.write(buffer or '') | |
| 1131 f.close() | |
| 1132 | |
| 1133 os.system('%s %s' % (self.editor, filename)) | |
| 1134 self.do__load(filename) | |
| 1135 do_edit = do_ed | |
| 1136 | |
| 1137 saveparser = (pyparsing.Optional(pyparsing.Word(pyparsing.nums)^'*')("idx") + | |
| 1138 pyparsing.Optional(pyparsing.Word(legalChars + '/\\'))("fname") + | |
| 1139 pyparsing.stringEnd) | |
| 1140 def do_save(self, arg): | |
| 1141 """`save [N] [filename.ext]` | |
| 329 | 1142 |
| 230 | 1143 Saves command from history to file. |
| 329 | 1144 |
| 1145 | N => Number of command (from history), or `*`; | |
| 1146 | most recent command if omitted""" | |
| 230 | 1147 |
| 1148 try: | |
| 1149 args = self.saveparser.parseString(arg) | |
| 1150 except pyparsing.ParseException: | |
|
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1151 self.perror(self.do_save.__doc__) |
| 230 | 1152 return |
| 1153 fname = args.fname or self.default_file_name | |
| 1154 if args.idx == '*': | |
| 1155 saveme = '\n\n'.join(self.history[:]) | |
| 1156 elif args.idx: | |
| 1157 saveme = self.history[int(args.idx)-1] | |
| 1158 else: | |
| 1159 saveme = self.history[-1] | |
| 1160 try: | |
| 1161 f = open(os.path.expanduser(fname), 'w') | |
| 1162 f.write(saveme) | |
| 1163 f.close() | |
|
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1164 self.pfeedback('Saved to %s' % (fname)) |
| 230 | 1165 except Exception, e: |
|
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1166 self.perror('Error saving %s: %s' % (fname, str(e))) |
| 230 | 1167 |
|
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1168 def read_file_or_url(self, fname): |
|
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1169 # TODO: not working on localhost |
|
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1170 if isinstance(fname, file): |
|
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1171 result = open(fname, 'r') |
|
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1172 else: |
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1173 match = self.urlre.match(fname) |
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1174 if match: |
|
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1175 result = urllib.urlopen(match.group(1)) |
| 230 | 1176 else: |
|
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1177 fname = os.path.expanduser(fname) |
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1178 try: |
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1179 result = open(os.path.expanduser(fname), 'r') |
|
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1180 except IOError: |
|
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1181 result = open('%s.%s' % (os.path.expanduser(fname), |
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1182 self.defaultExtension), 'r') |
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1183 return result |
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1184 |
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1185 def do__relative_load(self, arg=None): |
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1186 ''' |
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1187 Runs commands in script at file or URL; if this is called from within an |
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1188 already-running script, the filename will be interpreted relative to the |
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1189 already-running script's directory.''' |
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1190 if arg: |
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1191 arg = arg.split(None, 1) |
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1192 targetname, args = arg[0], (arg[1:] or [''])[0] |
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1193 targetname = os.path.join(self.current_script_dir or '', targetname) |
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1194 self.do__load('%s %s' % (targetname, args)) |
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1195 |
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1196 urlre = re.compile('(https?://[-\\w\\./]+)') |
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1197 def do_load(self, arg=None): |
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1198 """Runs script of command(s) from a file or URL.""" |
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1199 if arg is None: |
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1200 targetname = self.default_file_name |
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1201 else: |
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1202 arg = arg.split(None, 1) |
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1203 targetname, args = arg[0], (arg[1:] or [''])[0].strip() |
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1204 try: |
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1205 target = self.read_file_or_url(targetname) |
| 230 | 1206 except IOError, e: |
|
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1207 self.perror('Problem accessing script from %s: \n%s' % (targetname, e)) |
| 230 | 1208 return |
|
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1209 keepstate = Statekeeper(self, ('stdin','use_rawinput','prompt', |
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1210 'continuation_prompt','current_script_dir')) |
| 230 | 1211 self.stdin = target |
| 1212 self.use_rawinput = False | |
| 1213 self.prompt = self.continuation_prompt = '' | |
|
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1214 self.current_script_dir = os.path.split(targetname)[0] |
| 334 | 1215 stop = self._cmdloop() |
| 230 | 1216 self.stdin.close() |
| 1217 keepstate.restore() | |
| 1218 self.lastcmd = '' | |
| 1219 return (stop == self._STOP_AND_EXIT) and self._STOP_AND_EXIT | |
| 1220 do__load = do_load # avoid an unfortunate legacy use of do_load from sqlpython | |
| 1221 | |
| 1222 def do_run(self, arg): | |
| 1223 """run [arg]: re-runs an earlier command | |
| 1224 | |
| 1225 no arg -> run most recent command | |
| 1226 arg is integer -> run one history item, by index | |
| 1227 arg is string -> run most recent command by string search | |
| 1228 arg is /enclosed in forward-slashes/ -> run most recent by regex | |
| 1229 """ | |
| 1230 'run [N]: runs the SQL that was run N commands ago' | |
| 1231 runme = self.last_matching(arg) | |
|
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1232 self.pfeedback(runme) |
| 230 | 1233 if runme: |
| 1234 runme = self.precmd(runme) | |
| 1235 stop = self.onecmd(runme) | |
| 1236 stop = self.postcmd(stop, runme) | |
| 1237 do_r = do_run | |
| 1238 | |
| 1239 def fileimport(self, statement, source): | |
| 1240 try: | |
| 1241 f = open(os.path.expanduser(source)) | |
| 1242 except IOError: | |
| 1243 self.stdout.write("Couldn't read from file %s\n" % source) | |
| 1244 return '' | |
| 1245 data = f.read() | |
| 1246 f.close() | |
| 1247 return data | |
| 334 | 1248 |
| 1249 def runTranscriptTests(self, callargs): | |
| 1250 class TestMyAppCase(Cmd2TestCase): | |
| 1251 CmdApp = self.__class__ | |
| 1252 self.__class__.testfiles = callargs | |
| 1253 sys.argv = [sys.argv[0]] # the --test argument upsets unittest.main() | |
| 1254 testcase = TestMyAppCase() | |
| 1255 runner = unittest.TextTestRunner() | |
| 1256 result = runner.run(testcase) | |
| 1257 result.printErrors() | |
| 1258 | |
| 1259 def cmdloop(self): | |
| 1260 parser = optparse.OptionParser() | |
| 1261 parser.add_option('-t', '--test', dest='test', | |
| 1262 action="store_true", | |
| 1263 help='Test against transcript(s) in FILE (wildcards OK)') | |
| 1264 (callopts, callargs) = parser.parse_args() | |
| 1265 if callopts.test: | |
| 1266 self.runTranscriptTests(callargs) | |
| 1267 else: | |
| 1268 # hold onto the args and run .onecmd with them | |
| 1269 # in sqlpython, first arg has implied \connect | |
| 1270 for initial_command in callargs: | |
| 1271 if self.onecmd(initial_command + '\n') == app._STOP_AND_EXIT: | |
| 1272 return | |
| 1273 self._cmdloop() | |
| 230 | 1274 |
| 1275 class HistoryItem(str): | |
| 305 | 1276 listformat = '-------------------------[%d]\n%s\n' |
| 230 | 1277 def __init__(self, instr): |
| 1278 str.__init__(self) | |
| 1279 self.lowercase = self.lower() | |
| 1280 self.idx = None | |
| 1281 def pr(self): | |
| 307 | 1282 return self.listformat % (self.idx, str(self)) |
| 230 | 1283 |
| 1284 class History(list): | |
| 305 | 1285 '''A list of HistoryItems that knows how to respond to user requests. |
| 1286 >>> h = History([HistoryItem('first'), HistoryItem('second'), HistoryItem('third'), HistoryItem('fourth')]) | |
| 1287 >>> h.span('-2..') | |
| 1288 ['third', 'fourth'] | |
| 1289 >>> h.span('2..3') | |
| 1290 ['second', 'third'] | |
| 1291 >>> h.span('3') | |
| 1292 ['third'] | |
| 1293 >>> h.span(':') | |
| 1294 ['first', 'second', 'third', 'fourth'] | |
| 1295 >>> h.span('2..') | |
| 1296 ['second', 'third', 'fourth'] | |
| 1297 >>> h.span('-1') | |
| 1298 ['fourth'] | |
| 1299 >>> h.span('-2..-3') | |
| 306 | 1300 ['third', 'second'] |
| 308 | 1301 >>> h.search('o') |
| 1302 ['second', 'fourth'] | |
| 1303 >>> h.search('/IR/') | |
| 1304 ['first', 'third'] | |
| 305 | 1305 ''' |
| 1306 def zero_based_index(self, onebased): | |
| 1307 result = onebased | |
| 1308 if result > 0: | |
| 1309 result -= 1 | |
| 1310 return result | |
| 1311 def to_index(self, raw): | |
| 1312 if raw: | |
| 1313 result = self.zero_based_index(int(raw)) | |
| 1314 else: | |
| 1315 result = None | |
| 1316 return result | |
| 308 | 1317 def search(self, target): |
| 1318 target = target.strip() | |
| 1319 if target[0] == target[-1] == '/' and len(target) > 1: | |
| 1320 target = target[1:-1] | |
| 1321 else: | |
| 1322 target = re.escape(target) | |
| 1323 pattern = re.compile(target, re.IGNORECASE) | |
| 1324 return [s for s in self if pattern.search(s)] | |
| 305 | 1325 spanpattern = re.compile(r'^\s*(?P<start>\-?\d+)?\s*(?P<separator>:|(\.{2,}))?\s*(?P<end>\-?\d+)?\s*$') |
| 1326 def span(self, raw): | |
| 308 | 1327 if raw.lower() in ('*', '-', 'all'): |
| 1328 raw = ':' | |
| 305 | 1329 results = self.spanpattern.search(raw) |
| 307 | 1330 if not results: |
| 1331 raise IndexError | |
| 305 | 1332 if not results.group('separator'): |
| 1333 return [self[self.to_index(results.group('start'))]] | |
| 1334 start = self.to_index(results.group('start')) | |
| 1335 end = self.to_index(results.group('end')) | |
| 1336 reverse = False | |
| 1337 if end is not None: | |
| 1338 if end < start: | |
| 1339 (start, end) = (end, start) | |
| 1340 reverse = True | |
| 1341 end += 1 | |
| 1342 result = self[start:end] | |
| 1343 if reverse: | |
| 1344 result.reverse() | |
| 1345 return result | |
| 1346 | |
| 1347 rangePattern = re.compile(r'^\s*(?P<start>[\d]+)?\s*\-\s*(?P<end>[\d]+)?\s*$') | |
| 230 | 1348 def append(self, new): |
| 1349 new = HistoryItem(new) | |
| 1350 list.append(self, new) | |
| 1351 new.idx = len(self) | |
| 1352 def extend(self, new): | |
| 1353 for n in new: | |
| 1354 self.append(n) | |
| 305 | 1355 |
| 1356 def get(self, getme=None, fromEnd=False): | |
| 1357 if not getme: | |
| 1358 return self | |
| 230 | 1359 try: |
| 1360 getme = int(getme) | |
| 1361 if getme < 0: | |
| 1362 return self[:(-1 * getme)] | |
| 1363 else: | |
| 1364 return [self[getme-1]] | |
| 1365 except IndexError: | |
| 1366 return [] | |
| 305 | 1367 except ValueError: |
| 1368 rangeResult = self.rangePattern.search(getme) | |
| 1369 if rangeResult: | |
| 1370 start = rangeResult.group('start') or None | |
| 1371 end = rangeResult.group('start') or None | |
| 1372 if start: | |
| 1373 start = int(start) - 1 | |
| 1374 if end: | |
| 1375 end = int(end) | |
| 1376 return self[start:end] | |
| 1377 | |
| 230 | 1378 getme = getme.strip() |
| 305 | 1379 |
| 230 | 1380 if getme.startswith(r'/') and getme.endswith(r'/'): |
| 1381 finder = re.compile(getme[1:-1], re.DOTALL | re.MULTILINE | re.IGNORECASE) | |
| 1382 def isin(hi): | |
| 1383 return finder.search(hi) | |
| 1384 else: | |
| 1385 def isin(hi): | |
| 1386 return (getme.lower() in hi.lowercase) | |
| 1387 return [itm for itm in self if isin(itm)] | |
| 1388 | |
| 1389 class NotSettableError(Exception): | |
| 1390 pass | |
| 1391 | |
| 1392 def cast(current, new): | |
| 1393 """Tries to force a new value into the same type as the current.""" | |
| 1394 typ = type(current) | |
| 1395 if typ == bool: | |
| 1396 try: | |
| 1397 return bool(int(new)) | |
| 1398 except ValueError, TypeError: | |
| 1399 pass | |
| 1400 try: | |
| 1401 new = new.lower() | |
| 1402 except: | |
| 1403 pass | |
| 1404 if (new=='on') or (new[0] in ('y','t')): | |
| 1405 return True | |
| 1406 if (new=='off') or (new[0] in ('n','f')): | |
| 1407 return False | |
| 1408 else: | |
| 1409 try: | |
| 1410 return typ(new) | |
| 1411 except: | |
| 1412 pass | |
| 1413 print "Problem setting parameter (now %s) to %s; incorrect type?" % (current, new) | |
| 1414 return current | |
| 1415 | |
| 1416 class Statekeeper(object): | |
| 1417 def __init__(self, obj, attribs): | |
| 1418 self.obj = obj | |
| 1419 self.attribs = attribs | |
| 282 | 1420 if self.obj: |
| 1421 self.save() | |
| 230 | 1422 def save(self): |
| 1423 for attrib in self.attribs: | |
| 1424 setattr(self, attrib, getattr(self.obj, attrib)) | |
| 1425 def restore(self): | |
| 282 | 1426 if self.obj: |
| 1427 for attrib in self.attribs: | |
| 1428 setattr(self.obj, attrib, getattr(self, attrib)) | |
| 230 | 1429 |
| 1430 class Borg(object): | |
| 1431 '''All instances of any Borg subclass will share state. | |
| 1432 from Python Cookbook, 2nd Ed., recipe 6.16''' | |
| 1433 _shared_state = {} | |
| 1434 def __new__(cls, *a, **k): | |
| 1435 obj = object.__new__(cls, *a, **k) | |
| 1436 obj.__dict__ = cls._shared_state | |
| 1437 return obj | |
| 1438 | |
| 1439 class OutputTrap(Borg): | |
| 1440 '''Instantiate an OutputTrap to divert/capture ALL stdout output. For use in unit testing. | |
| 1441 Call `tearDown()` to return to normal output.''' | |
| 1442 def __init__(self): | |
| 1443 self.old_stdout = sys.stdout | |
| 1444 self.trap = tempfile.TemporaryFile() | |
| 1445 sys.stdout = self.trap | |
| 1446 def read(self): | |
| 1447 self.trap.seek(0) | |
| 1448 result = self.trap.read() | |
| 1449 self.trap.truncate(0) | |
| 1450 return result.strip('\x00') | |
| 1451 def tearDown(self): | |
| 1452 sys.stdout = self.old_stdout | |
| 1453 | |
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1454 |
| 230 | 1455 class Cmd2TestCase(unittest.TestCase): |
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1456 '''Subclass this, setting CmdApp, to make a unittest.TestCase class |
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1457 that will execute the commands in a transcript file and expect the results shown. |
| 230 | 1458 See example.py''' |
| 1459 CmdApp = None | |
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1460 def fetchTranscripts(self): |
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1461 self.transcripts = {} |
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1462 for fileset in self.CmdApp.testfiles: |
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1463 for fname in glob.glob(fileset): |
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1464 tfile = open(fname) |
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1465 self.transcripts[fname] = iter(tfile.readlines()) |
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1466 tfile.close() |
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1467 if not len(self.transcripts): |
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1468 raise StandardError, "No test files found - nothing to test." |
| 230 | 1469 def setUp(self): |
| 1470 if self.CmdApp: | |
| 1471 self.outputTrap = OutputTrap() | |
| 1472 self.cmdapp = self.CmdApp() | |
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1473 self.fetchTranscripts() |
| 326 | 1474 def runTest(self): # was testall |
| 230 | 1475 if self.CmdApp: |
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1476 its = sorted(self.transcripts.items()) |
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1477 for (fname, transcript) in its: |
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1478 self._test_transcript(fname, transcript) |
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1479 regexPattern = pyparsing.QuotedString(quoteChar=r'/', escChar='\\', multiline=True, unquoteResults=True) |
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1480 regexPattern.ignore(pyparsing.cStyleComment) |
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1481 notRegexPattern = pyparsing.Word(pyparsing.printables) |
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1482 notRegexPattern.setParseAction(lambda t: re.escape(t[0])) |
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1483 expectationParser = regexPattern | notRegexPattern |
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1484 endStrippingRegex = re.compile(r'[ \t]*\n') |
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1485 def _test_transcript(self, fname, transcript): |
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1486 lineNum = 0 |
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1487 try: |
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1488 line = transcript.next() |
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1489 while True: |
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1490 while not line.startswith(self.cmdapp.prompt): |
|
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1491 line = transcript.next() |
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1492 command = [line[len(self.cmdapp.prompt):]] |
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1493 line = transcript.next() |
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1494 while line.startswith(self.cmdapp.continuation_prompt): |
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1495 command.append(line[len(self.cmdapp.continuation_prompt):]) |
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1496 line = transcript.next() |
| 322 | 1497 command = ''.join(command) |
| 305 | 1498 self.cmdapp.onecmd(command) |
| 322 | 1499 result = self.outputTrap.read() |
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1500 if line.startswith(self.cmdapp.prompt): |
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1501 message = '\nFile %s, line %d\nCommand was:\n%s\nExpected: (nothing)\nGot:\n%s\n'%\ |
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1502 (fname, lineNum, command, result) |
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1503 self.assert_(not(result.strip()), message) |
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1504 continue |
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1505 expected = [] |
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1506 while not line.startswith(self.cmdapp.prompt): |
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1507 expected.append(line) |
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1508 line = transcript.next() |
| 322 | 1509 expected = ''.join(expected) |
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1510 message = '\nFile %s, line %d\nCommand was:\n%s\nExpected:\n%s\nGot:\n%s\n'%\ |
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1511 (fname, lineNum, command, expected, result) |
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1512 expected = self.expectationParser.transformString(expected) |
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1513 expected = self.endStrippingRegex.sub('\s*\n', expected) |
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1514 self.assert_(re.match(expected, result, re.MULTILINE | re.DOTALL), message) |
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1515 except StopIteration: |
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1516 pass |
| 230 | 1517 def tearDown(self): |
| 1518 if self.CmdApp: | |
| 1519 self.outputTrap.tearDown() | |
|
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1520 |
| 230 | 1521 if __name__ == '__main__': |
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1522 doctest.testmod(optionflags = doctest.NORMALIZE_WHITESPACE) |
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1523 |
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1524 ''' |
| 327 | 1525 To make your application transcript-testable, replace |
| 1526 | |
| 1527 :: | |
| 1528 | |
| 1529 app = MyApp() | |
| 1530 app.cmdloop() | |
| 1531 | |
| 1532 with | |
| 1533 | |
| 1534 :: | |
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1535 |
| 327 | 1536 app = MyApp() |
| 1537 cmd2.run(app) | |
| 1538 | |
| 1539 Then run a session of your application and paste the entire screen contents | |
| 1540 into a file, ``transcript.test``, and invoke the test like:: | |
| 1541 | |
| 1542 python myapp.py --test transcript.test | |
| 1543 | |
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1544 Wildcards can be used to test against multiple transcript files. |
| 327 | 1545 ''' |
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1546 |
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1547 |