Mercurial > python-cmd2
annotate cmd2.py @ 310:9d91406ca3a7
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| author | catherine@dellzilla |
|---|---|
| date | Fri, 29 Jan 2010 11:26:23 -0500 |
| parents | 1941e54cb776 |
| children | 54e2dd53ba38 |
| 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 |
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39 from code import InteractiveConsole, InteractiveInterpreter, softspace |
| 230 | 40 from optparse import make_option |
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41 |
| 309 | 42 if sys.version_info[0] > 2: |
| 43 import pyparsing_py3 as pyparsing | |
| 44 else: | |
| 45 import pyparsing | |
| 46 | |
| 280 | 47 __version__ = '0.5.6' |
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48 |
| 230 | 49 class OptionParser(optparse.OptionParser): |
| 50 def exit(self, status=0, msg=None): | |
| 51 self.values._exit = True | |
| 52 if msg: | |
| 53 print msg | |
| 54 | |
| 55 def print_help(self, *args, **kwargs): | |
| 56 try: | |
| 57 print self._func.__doc__ | |
| 58 except AttributeError: | |
| 59 pass | |
| 60 optparse.OptionParser.print_help(self, *args, **kwargs) | |
| 61 | |
| 62 def error(self, msg): | |
| 63 """error(msg : string) | |
| 64 | |
| 65 Print a usage message incorporating 'msg' to stderr and exit. | |
| 66 If you override this in a subclass, it should not return -- it | |
| 67 should either exit or raise an exception. | |
| 68 """ | |
| 69 raise | |
| 70 | |
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71 def remaining_args(oldArgs, newArgList): |
| 230 | 72 ''' |
| 285 | 73 Preserves the spacing originally in the argument after |
| 74 the removal of options. | |
| 75 | |
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76 >>> remaining_args('-f bar bar cow', ['bar', 'cow']) |
| 230 | 77 'bar cow' |
| 78 ''' | |
| 79 pattern = '\s+'.join(re.escape(a) for a in newArgList) + '\s*$' | |
| 80 matchObj = re.search(pattern, oldArgs) | |
| 81 return oldArgs[matchObj.start():] | |
| 280 | 82 |
| 83 def _attr_get_(obj, attr): | |
| 84 '''Returns an attribute's value, or None (no error) if undefined. | |
| 286 | 85 Analagous to .get() for dictionaries. Useful when checking for |
| 86 value of options that may not have been defined on a given | |
| 87 method.''' | |
| 280 | 88 try: |
| 89 return getattr(obj, attr) | |
| 90 except AttributeError: | |
| 91 return None | |
| 283 | 92 |
| 93 optparse.Values.get = _attr_get_ | |
| 94 | |
| 230 | 95 def options(option_list): |
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96 '''Used as a decorator and passed a list of optparse-style options, |
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97 alters a cmd2 methodo populate its ``opts`` argument from its |
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98 raw text argument. |
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99 |
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100 Example: transform |
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101 def do_something(self, arg): |
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102 |
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103 into |
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104 @options([make_option('-q', '--quick', action="store_true", |
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105 help="Makes things fast")]) |
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106 def do_something(self, arg, opts): |
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107 if opts.quick: |
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108 self.fast_button = True |
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109 ''' |
| 296 | 110 if not isinstance(option_list, list): |
| 298 | 111 option_list = [option_list] |
| 230 | 112 def option_setup(func): |
| 113 optionParser = OptionParser() | |
| 114 for opt in option_list: | |
| 115 optionParser.add_option(opt) | |
| 116 optionParser.set_usage("%s [options] arg" % func.__name__.strip('do_')) | |
| 117 optionParser._func = func | |
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118 def new_func(instance, arg): |
| 230 | 119 try: |
| 302 | 120 opts, newArgList = optionParser.parse_args(arg.split()) |
| 285 | 121 # Must find the remaining args in the original argument list, but |
| 122 # mustn't include the command itself | |
| 302 | 123 #if hasattr(arg, 'parsed') and newArgList[0] == arg.parsed.command: |
| 124 # newArgList = newArgList[1:] | |
| 125 newArgs = remaining_args(arg, newArgList) | |
| 301 | 126 if isinstance(arg, ParsedString): |
| 127 arg = arg.with_args_replaced(newArgs) | |
| 128 else: | |
| 129 arg = newArgs | |
| 230 | 130 except (optparse.OptionValueError, optparse.BadOptionError, |
| 131 optparse.OptionError, optparse.AmbiguousOptionError, | |
| 132 optparse.OptionConflictError), e: | |
| 133 print e | |
| 134 optionParser.print_help() | |
| 135 return | |
| 136 if hasattr(opts, '_exit'): | |
| 137 return None | |
| 138 result = func(instance, arg, opts) | |
| 139 return result | |
| 289 | 140 new_func.__doc__ = '%s\n%s' % (func.__doc__, optionParser.format_help()) |
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141 return new_func |
| 230 | 142 return option_setup |
| 143 | |
| 144 class PasteBufferError(EnvironmentError): | |
| 145 if sys.platform[:3] == 'win': | |
| 146 errmsg = """Redirecting to or from paste buffer requires pywin32 | |
| 147 to be installed on operating system. | |
| 148 Download from http://sourceforge.net/projects/pywin32/""" | |
| 149 else: | |
| 150 errmsg = """Redirecting to or from paste buffer requires xclip | |
| 151 to be installed on operating system. | |
| 152 On Debian/Ubuntu, 'sudo apt-get install xclip' will install it.""" | |
| 153 def __init__(self): | |
| 154 Exception.__init__(self, self.errmsg) | |
| 155 | |
| 156 pastebufferr = """Redirecting to or from paste buffer requires %s | |
| 157 to be installed on operating system. | |
| 158 %s""" | |
| 286 | 159 |
| 230 | 160 if subprocess.mswindows: |
| 161 try: | |
| 162 import win32clipboard | |
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163 def get_paste_buffer(): |
| 230 | 164 win32clipboard.OpenClipboard(0) |
| 165 try: | |
| 166 result = win32clipboard.GetClipboardData() | |
| 167 except TypeError: | |
| 168 result = '' #non-text | |
| 169 win32clipboard.CloseClipboard() | |
| 170 return result | |
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171 def write_to_paste_buffer(txt): |
| 230 | 172 win32clipboard.OpenClipboard(0) |
| 173 win32clipboard.EmptyClipboard() | |
| 174 win32clipboard.SetClipboardText(txt) | |
| 175 win32clipboard.CloseClipboard() | |
| 176 except ImportError: | |
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177 def get_paste_buffer(*args): |
| 230 | 178 raise OSError, pastebufferr % ('pywin32', 'Download from http://sourceforge.net/projects/pywin32/') |
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179 setPasteBuffer = get_paste_buffer |
| 230 | 180 else: |
| 181 can_clip = False | |
| 182 try: | |
| 183 subprocess.check_call('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 184 can_clip = True | |
| 185 except AttributeError: # check_call not defined, Python < 2.5 | |
| 186 teststring = 'Testing for presence of xclip.' | |
| 187 xclipproc = subprocess.Popen('xclip -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 188 xclipproc.stdin.write(teststring) | |
| 189 xclipproc.stdin.close() | |
| 190 xclipproc = subprocess.Popen('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 191 if xclipproc.stdout.read() == teststring: | |
| 192 can_clip = True | |
| 193 except (subprocess.CalledProcessError, OSError, IOError): | |
| 194 pass | |
| 195 if can_clip: | |
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196 def get_paste_buffer(): |
| 230 | 197 xclipproc = subprocess.Popen('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) |
| 198 return xclipproc.stdout.read() | |
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199 def write_to_paste_buffer(txt): |
| 230 | 200 xclipproc = subprocess.Popen('xclip -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) |
| 201 xclipproc.stdin.write(txt) | |
| 202 xclipproc.stdin.close() | |
| 203 # but we want it in both the "primary" and "mouse" clipboards | |
| 204 xclipproc = subprocess.Popen('xclip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 205 xclipproc.stdin.write(txt) | |
| 206 xclipproc.stdin.close() | |
| 207 else: | |
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208 def get_paste_buffer(*args): |
| 230 | 209 raise OSError, pastebufferr % ('xclip', 'On Debian/Ubuntu, install with "sudo apt-get install xclip"') |
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210 setPasteBuffer = get_paste_buffer |
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211 writeToPasteBuffer = get_paste_buffer |
| 230 | 212 |
| 213 pyparsing.ParserElement.setDefaultWhitespaceChars(' \t') | |
| 214 | |
| 215 class ParsedString(str): | |
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216 def full_parsed_statement(self): |
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217 new = ParsedString('%s %s' % (self.parsed.command, self.parsed.args)) |
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218 new.parsed = self.parsed |
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219 new.parser = self.parser |
| 301 | 220 return new |
| 221 def with_args_replaced(self, newargs): | |
| 222 new = ParsedString(newargs) | |
| 223 new.parsed = self.parsed | |
| 224 new.parser = self.parser | |
| 225 new.parsed['args'] = newargs | |
| 226 new.parsed.statement['args'] = newargs | |
| 227 return new | |
| 230 | 228 |
| 229 class SkipToLast(pyparsing.SkipTo): | |
| 230 def parseImpl( self, instring, loc, doActions=True ): | |
| 231 resultStore = [] | |
| 232 startLoc = loc | |
| 233 instrlen = len(instring) | |
| 234 expr = self.expr | |
| 235 failParse = False | |
| 236 while loc <= instrlen: | |
| 237 try: | |
| 238 if self.failOn: | |
| 239 failParse = True | |
| 240 self.failOn.tryParse(instring, loc) | |
| 241 failParse = False | |
| 242 loc = expr._skipIgnorables( instring, loc ) | |
| 243 expr._parse( instring, loc, doActions=False, callPreParse=False ) | |
| 244 skipText = instring[startLoc:loc] | |
| 245 if self.includeMatch: | |
| 246 loc,mat = expr._parse(instring,loc,doActions,callPreParse=False) | |
| 247 if mat: | |
| 248 skipRes = ParseResults( skipText ) | |
| 249 skipRes += mat | |
| 250 resultStore.append((loc, [ skipRes ])) | |
| 251 else: | |
| 252 resultStore,append((loc, [ skipText ])) | |
| 253 else: | |
| 254 resultStore.append((loc, [ skipText ])) | |
| 255 loc += 1 | |
| 256 except (pyparsing.ParseException,IndexError): | |
| 257 if failParse: | |
| 258 raise | |
| 259 else: | |
| 260 loc += 1 | |
| 261 if resultStore: | |
| 262 return resultStore[-1] | |
| 263 else: | |
| 264 exc = self.myException | |
| 265 exc.loc = loc | |
| 266 exc.pstr = instring | |
| 267 raise exc | |
| 268 | |
| 269 def replace_with_file_contents(fname): | |
| 270 if fname: | |
| 271 try: | |
| 272 result = open(os.path.expanduser(fname[0])).read() | |
| 273 except IOError: | |
| 274 result = '< %s' % fname[0] # wasn't a file after all | |
| 275 else: | |
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276 result = get_paste_buffer() |
| 233 | 277 return result |
| 278 | |
| 234 | 279 class EmbeddedConsoleExit(Exception): |
| 280 pass | |
| 281 | |
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282 class MyInteractiveConsole(InteractiveConsole): |
| 234 | 283 def runcode(self, code): |
| 284 """Execute a code object. | |
| 285 | |
| 286 When an exception occurs, self.showtraceback() is called to | |
| 287 display a traceback. All exceptions are caught except | |
| 288 SystemExit, which is reraised. | |
| 289 | |
| 290 A note about KeyboardInterrupt: this exception may occur | |
| 291 elsewhere in this code, and may not always be caught. The | |
| 292 caller should be prepared to deal with it. | |
| 293 | |
| 294 Copied directly from code.InteractiveInterpreter, except for | |
| 295 EmbeddedConsoleExit exceptions. | |
| 296 """ | |
| 297 try: | |
| 298 exec code in self.locals | |
| 299 except (SystemExit, EmbeddedConsoleExit): | |
| 300 raise | |
| 301 except: | |
| 302 self.showtraceback() | |
| 303 else: | |
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304 if softspace(sys.stdout, 0): |
| 234 | 305 print |
| 306 | |
| 290 | 307 def ljust(x, width, fillchar=' '): |
| 308 'analogous to str.ljust, but works for lists' | |
| 309 if hasattr(x, 'ljust'): | |
| 310 return x.ljust(width, fillchar) | |
| 311 else: | |
| 312 if len(x) < width: | |
| 313 x = (x + [fillchar] * width)[:width] | |
| 314 return x | |
| 315 | |
| 230 | 316 class Cmd(cmd.Cmd): |
| 317 echo = False | |
| 286 | 318 case_insensitive = True # Commands recognized regardless of case |
| 230 | 319 continuation_prompt = '> ' |
| 286 | 320 timing = False # Prints elapsed time for each command |
| 321 # make sure your terminators are not in legalChars! | |
| 322 legalChars = '!#$%.:?@_' + pyparsing.alphanums + pyparsing.alphas8bit | |
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323 shortcuts = {'?': 'help', '!': 'shell', '@': 'load', '@@': '_relative_load'} |
| 230 | 324 excludeFromHistory = '''run r list l history hi ed edit li eof'''.split() |
| 325 noSpecialParse = 'set ed edit exit'.split() | |
| 286 | 326 defaultExtension = 'txt' # For ``save``, ``load``, etc. |
| 327 default_file_name = 'command.txt' # For ``save``, ``load``, etc. | |
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328 abbrev = True # Abbreviated commands recognized |
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329 current_script_dir = None |
| 245 | 330 reserved_words = [] |
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331 feedback_to_output = False # Do include nonessentials in >, | output |
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332 quiet = False # Do not suppress nonessential output |
| 298 | 333 debug = True |
| 290 | 334 settable = ''' |
| 335 prompt | |
| 336 continuation_prompt | |
| 337 debug | |
| 338 default_file_name for `save`, `load`, etc. | |
| 339 editor | |
| 340 case_insensitive upper- and lower-case both OK | |
| 341 feedback_to_output include nonessentials in `|`, `>` results | |
| 342 quiet | |
| 343 echo Echo command issued into output | |
| 344 timing Report execution times | |
| 345 abbrev Accept abbreviated commands | |
| 346 '''.splitlines() | |
| 230 | 347 |
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348 def poutput(self, msg): |
| 284 | 349 if msg: |
| 350 self.stdout.write(msg) | |
| 351 if msg[-1] != '\n': | |
| 352 self.stdout.write('\n') | |
| 276 | 353 def perror(self, errmsg, statement=None): |
| 282 | 354 if self.debug: |
| 355 traceback.print_exc() | |
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356 print str(errmsg) |
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357 def pfeedback(self, msg): |
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358 """For printing nonessential feedback. Can be silenced with `quiet`. |
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359 Inclusion in redirected output is controlled by `feedback_to_output`.""" |
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360 if not self.quiet: |
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361 if self.feedback_to_output: |
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362 self.poutput(msg) |
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363 else: |
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364 print msg |
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365 _STOP_AND_EXIT = 2 |
| 230 | 366 editor = os.environ.get('EDITOR') |
| 367 if not editor: | |
| 368 if sys.platform[:3] == 'win': | |
| 369 editor = 'notepad' | |
| 370 else: | |
| 371 for editor in ['gedit', 'kate', 'vim', 'emacs', 'nano', 'pico']: | |
| 372 if not os.system('which %s' % (editor)): | |
| 373 break | |
| 374 | |
| 375 def do_cmdenvironment(self, args): | |
| 376 '''Summary report of interactive parameters.''' | |
| 377 self.stdout.write(""" | |
| 378 Commands are %(casesensitive)scase-sensitive. | |
| 379 Commands may be terminated with: %(terminators)s | |
| 237 | 380 Settable parameters: %(settable)s\n""" % \ |
| 230 | 381 { 'casesensitive': (self.case_insensitive and 'not ') or '', |
| 382 'terminators': str(self.terminators), | |
| 383 'settable': ' '.join(self.settable) | |
| 384 }) | |
| 385 | |
| 386 def do_help(self, arg): | |
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387 if arg: |
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388 funcname = self.func_named(arg) |
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389 if funcname: |
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390 fn = getattr(self, funcname) |
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391 try: |
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392 fn.optionParser.print_help(file=self.stdout) |
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393 except AttributeError: |
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394 cmd.Cmd.do_help(self, funcname[3:]) |
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395 else: |
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396 cmd.Cmd.do_help(self, arg) |
| 230 | 397 |
| 398 def __init__(self, *args, **kwargs): | |
| 399 cmd.Cmd.__init__(self, *args, **kwargs) | |
| 271 | 400 self.initial_stdout = sys.stdout |
| 230 | 401 self.history = History() |
| 402 self._init_parser() | |
| 403 self.pystate = {} | |
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404 self.shortcuts = sorted(self.shortcuts.items(), reverse=True) |
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405 self.keywords = self.reserved_words + [fname[3:] for fname in dir(self) |
| 290 | 406 if fname.startswith('do_')] |
| 407 self.settable = (l.strip() for l in self.settable if l.strip()) | |
| 408 self.settable = dict(ljust(l.split(None,1), 2, '') for l in self.settable) | |
| 409 | |
| 230 | 410 def do_shortcuts(self, args): |
| 411 """Lists single-key shortcuts available.""" | |
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412 result = "\n".join('%s: %s' % (sc[0], sc[1]) for sc in sorted(self.shortcuts)) |
| 230 | 413 self.stdout.write("Single-key shortcuts for other commands:\n%s\n" % (result)) |
| 414 | |
| 415 prefixParser = pyparsing.Empty() | |
| 416 commentGrammars = pyparsing.Or([pyparsing.pythonStyleComment, pyparsing.cStyleComment]) | |
| 417 commentGrammars.addParseAction(lambda x: '') | |
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418 commentInProgress = pyparsing.Literal('/*') + pyparsing.SkipTo( |
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419 pyparsing.stringEnd ^ '*/') |
| 230 | 420 terminators = [';'] |
| 421 blankLinesAllowed = False | |
| 422 multilineCommands = [] | |
| 423 | |
| 424 def _init_parser(self): | |
| 425 r''' | |
| 426 >>> c = Cmd() | |
| 427 >>> c.multilineCommands = ['multiline'] | |
| 428 >>> c.case_insensitive = True | |
| 429 >>> c._init_parser() | |
| 430 >>> print c.parser.parseString('').dump() | |
| 431 [] | |
| 432 >>> print c.parser.parseString('/* empty command */').dump() | |
| 433 [] | |
| 434 >>> print c.parser.parseString('plainword').dump() | |
| 435 ['plainword', ''] | |
| 436 - command: plainword | |
| 437 - statement: ['plainword', ''] | |
| 438 - command: plainword | |
| 439 >>> print c.parser.parseString('termbare;').dump() | |
| 440 ['termbare', '', ';', ''] | |
| 441 - command: termbare | |
| 442 - statement: ['termbare', '', ';'] | |
| 443 - command: termbare | |
| 444 - terminator: ; | |
| 445 - terminator: ; | |
| 446 >>> print c.parser.parseString('termbare; suffx').dump() | |
| 447 ['termbare', '', ';', 'suffx'] | |
| 448 - command: termbare | |
| 449 - statement: ['termbare', '', ';'] | |
| 450 - command: termbare | |
| 451 - terminator: ; | |
| 452 - suffix: suffx | |
| 453 - terminator: ; | |
| 454 >>> print c.parser.parseString('barecommand').dump() | |
| 455 ['barecommand', ''] | |
| 456 - command: barecommand | |
| 457 - statement: ['barecommand', ''] | |
| 458 - command: barecommand | |
| 459 >>> print c.parser.parseString('COMmand with args').dump() | |
| 460 ['command', 'with args'] | |
| 461 - args: with args | |
| 462 - command: command | |
| 463 - statement: ['command', 'with args'] | |
| 464 - args: with args | |
| 465 - command: command | |
| 466 >>> print c.parser.parseString('command with args and terminator; and suffix').dump() | |
| 467 ['command', 'with args and terminator', ';', 'and suffix'] | |
| 468 - args: with args and terminator | |
| 469 - command: command | |
| 470 - statement: ['command', 'with args and terminator', ';'] | |
| 471 - args: with args and terminator | |
| 472 - command: command | |
| 473 - terminator: ; | |
| 474 - suffix: and suffix | |
| 475 - terminator: ; | |
| 476 >>> print c.parser.parseString('simple | piped').dump() | |
| 477 ['simple', '', '|', ' piped'] | |
| 478 - command: simple | |
| 479 - pipeTo: piped | |
| 480 - statement: ['simple', ''] | |
| 481 - command: simple | |
| 482 >>> print c.parser.parseString('double-pipe || is not a pipe').dump() | |
| 483 ['double', '-pipe || is not a pipe'] | |
| 484 - args: -pipe || is not a pipe | |
| 485 - command: double | |
| 486 - statement: ['double', '-pipe || is not a pipe'] | |
| 487 - args: -pipe || is not a pipe | |
| 488 - command: double | |
| 489 >>> print c.parser.parseString('command with args, terminator;sufx | piped').dump() | |
| 490 ['command', 'with args, terminator', ';', 'sufx', '|', ' piped'] | |
| 491 - args: with args, terminator | |
| 492 - command: command | |
| 493 - pipeTo: piped | |
| 494 - statement: ['command', 'with args, terminator', ';'] | |
| 495 - args: with args, terminator | |
| 496 - command: command | |
| 497 - terminator: ; | |
| 498 - suffix: sufx | |
| 499 - terminator: ; | |
| 500 >>> print c.parser.parseString('output into > afile.txt').dump() | |
| 501 ['output', 'into', '>', 'afile.txt'] | |
| 502 - args: into | |
| 503 - command: output | |
| 504 - output: > | |
| 505 - outputTo: afile.txt | |
| 506 - statement: ['output', 'into'] | |
| 507 - args: into | |
| 508 - command: output | |
| 509 >>> print c.parser.parseString('output into;sufx | pipethrume plz > afile.txt').dump() | |
| 510 ['output', 'into', ';', 'sufx', '|', ' pipethrume plz', '>', 'afile.txt'] | |
| 511 - args: into | |
| 512 - command: output | |
| 513 - output: > | |
| 514 - outputTo: afile.txt | |
| 515 - pipeTo: pipethrume plz | |
| 516 - statement: ['output', 'into', ';'] | |
| 517 - args: into | |
| 518 - command: output | |
| 519 - terminator: ; | |
| 520 - suffix: sufx | |
| 521 - terminator: ; | |
| 522 >>> print c.parser.parseString('output to paste buffer >> ').dump() | |
| 523 ['output', 'to paste buffer', '>>', ''] | |
| 524 - args: to paste buffer | |
| 525 - command: output | |
| 526 - output: >> | |
| 527 - statement: ['output', 'to paste buffer'] | |
| 528 - args: to paste buffer | |
| 529 - command: output | |
| 530 >>> print c.parser.parseString('ignore the /* commented | > */ stuff;').dump() | |
| 531 ['ignore', 'the /* commented | > */ stuff', ';', ''] | |
| 532 - args: the /* commented | > */ stuff | |
| 533 - command: ignore | |
| 534 - statement: ['ignore', 'the /* commented | > */ stuff', ';'] | |
| 535 - args: the /* commented | > */ stuff | |
| 536 - command: ignore | |
| 537 - terminator: ; | |
| 538 - terminator: ; | |
| 539 >>> print c.parser.parseString('has > inside;').dump() | |
| 540 ['has', '> inside', ';', ''] | |
| 541 - args: > inside | |
| 542 - command: has | |
| 543 - statement: ['has', '> inside', ';'] | |
| 544 - args: > inside | |
| 545 - command: has | |
| 546 - terminator: ; | |
| 547 - terminator: ; | |
| 548 >>> print c.parser.parseString('multiline has > inside an unfinished command').dump() | |
| 549 ['multiline', ' has > inside an unfinished command'] | |
| 550 - multilineCommand: multiline | |
| 551 >>> print c.parser.parseString('multiline has > inside;').dump() | |
| 552 ['multiline', 'has > inside', ';', ''] | |
| 553 - args: has > inside | |
| 554 - multilineCommand: multiline | |
| 555 - statement: ['multiline', 'has > inside', ';'] | |
| 556 - args: has > inside | |
| 557 - multilineCommand: multiline | |
| 558 - terminator: ; | |
| 559 - terminator: ; | |
| 560 >>> print c.parser.parseString('multiline command /* with comment in progress;').dump() | |
| 272 | 561 ['multiline', ' command'] |
| 562 - multilineCommand: multiline | |
| 230 | 563 >>> print c.parser.parseString('multiline command /* with comment complete */ is done;').dump() |
| 564 ['multiline', 'command /* with comment complete */ is done', ';', ''] | |
| 565 - args: command /* with comment complete */ is done | |
| 566 - multilineCommand: multiline | |
| 567 - statement: ['multiline', 'command /* with comment complete */ is done', ';'] | |
| 568 - args: command /* with comment complete */ is done | |
| 569 - multilineCommand: multiline | |
| 570 - terminator: ; | |
| 571 - terminator: ; | |
| 572 >>> print c.parser.parseString('multiline command ends\n\n').dump() | |
| 573 ['multiline', 'command ends', '\n', '\n'] | |
| 574 - args: command ends | |
| 575 - multilineCommand: multiline | |
| 576 - statement: ['multiline', 'command ends', '\n', '\n'] | |
| 577 - args: command ends | |
| 578 - multilineCommand: multiline | |
| 579 - terminator: ['\n', '\n'] | |
| 580 - terminator: ['\n', '\n'] | |
| 581 ''' | |
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582 tstr = 'multiline command /* with comment complete */ is done;' |
| 230 | 583 outputParser = (pyparsing.Literal('>>') | (pyparsing.WordStart() + '>') | pyparsing.Regex('[^=]>'))('output') |
| 584 | |
| 585 terminatorParser = pyparsing.Or([(hasattr(t, 'parseString') and t) or pyparsing.Literal(t) for t in self.terminators])('terminator') | |
| 586 stringEnd = pyparsing.stringEnd ^ '\nEOF' | |
| 587 self.multilineCommand = pyparsing.Or([pyparsing.Keyword(c, caseless=self.case_insensitive) for c in self.multilineCommands])('multilineCommand') | |
| 588 oneLineCommand = (~self.multilineCommand + pyparsing.Word(self.legalChars))('command') | |
| 589 pipe = pyparsing.Keyword('|', identChars='|') | |
| 285 | 590 self.commentGrammars.ignore(pyparsing.quotedString).setParseAction(lambda x: '') |
| 230 | 591 afterElements = \ |
| 592 pyparsing.Optional(pipe + pyparsing.SkipTo(outputParser ^ stringEnd)('pipeTo')) + \ | |
| 593 pyparsing.Optional(outputParser + pyparsing.SkipTo(stringEnd).setParseAction(lambda x: x[0].strip())('outputTo')) | |
| 594 if self.case_insensitive: | |
| 595 self.multilineCommand.setParseAction(lambda x: x[0].lower()) | |
| 596 oneLineCommand.setParseAction(lambda x: x[0].lower()) | |
| 597 if self.blankLinesAllowed: | |
| 598 self.blankLineTerminationParser = pyparsing.NoMatch | |
| 599 else: | |
| 600 self.blankLineTerminator = (pyparsing.lineEnd + pyparsing.lineEnd)('terminator') | |
| 601 self.blankLineTerminator.setResultsName('terminator') | |
| 602 self.blankLineTerminationParser = ((self.multilineCommand ^ oneLineCommand) + pyparsing.SkipTo(self.blankLineTerminator).setParseAction(lambda x: x[0].strip())('args') + self.blankLineTerminator)('statement') | |
| 603 self.multilineParser = (((self.multilineCommand ^ oneLineCommand) + SkipToLast(terminatorParser).setParseAction(lambda x: x[0].strip())('args') + terminatorParser)('statement') + | |
| 604 pyparsing.SkipTo(outputParser ^ pipe ^ stringEnd).setParseAction(lambda x: x[0].strip())('suffix') + afterElements) | |
| 250 | 605 self.multilineParser.ignore(self.commentInProgress) |
| 230 | 606 self.singleLineParser = ((oneLineCommand + pyparsing.SkipTo(terminatorParser ^ stringEnd ^ pipe ^ outputParser).setParseAction(lambda x:x[0].strip())('args'))('statement') + |
| 607 pyparsing.Optional(terminatorParser) + afterElements) | |
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608 #self.multilineParser = self.multilineParser.setResultsName('multilineParser') |
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609 #self.singleLineParser = self.singleLineParser.setResultsName('singleLineParser') |
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610 self.blankLineTerminationParser = self.blankLineTerminationParser.setResultsName('statement') |
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611 self.parser = self.prefixParser + ( |
| 230 | 612 stringEnd | |
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613 self.multilineParser | |
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614 self.singleLineParser | |
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615 self.blankLineTerminationParser | |
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616 self.multilineCommand + pyparsing.SkipTo(stringEnd) |
| 230 | 617 ) |
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618 self.parser.ignore(pyparsing.quotedString).ignore(self.commentGrammars) |
| 230 | 619 |
| 620 inputMark = pyparsing.Literal('<') | |
| 621 inputMark.setParseAction(lambda x: '') | |
| 622 fileName = pyparsing.Word(self.legalChars + '/\\') | |
| 623 inputFrom = fileName('inputFrom') | |
| 624 inputFrom.setParseAction(replace_with_file_contents) | |
| 625 # a not-entirely-satisfactory way of distinguishing < as in "import from" from < | |
| 626 # as in "lesser than" | |
| 627 self.inputParser = inputMark + pyparsing.Optional(inputFrom) + pyparsing.Optional('>') + \ | |
| 628 pyparsing.Optional(fileName) + (pyparsing.stringEnd | '|') | |
| 629 self.inputParser.ignore(pyparsing.quotedString).ignore(self.commentGrammars).ignore(self.commentInProgress) | |
| 630 | |
| 631 def preparse(self, raw, **kwargs): | |
| 632 return raw | |
| 633 | |
| 634 def parsed(self, raw, **kwargs): | |
| 635 if isinstance(raw, ParsedString): | |
| 636 p = raw | |
| 637 else: | |
| 292 | 638 # preparse is an overridable hook; default makes no changes |
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639 s = self.preparse(raw, **kwargs) |
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640 s = self.inputParser.transformString(s.lstrip()) |
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641 s = self.commentGrammars.transformString(s) |
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642 for (shortcut, expansion) in self.shortcuts: |
| 230 | 643 if s.lower().startswith(shortcut): |
| 644 s = s.replace(shortcut, expansion + ' ', 1) | |
| 645 break | |
| 646 result = self.parser.parseString(s) | |
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647 result['raw'] = raw |
| 230 | 648 result['command'] = result.multilineCommand or result.command |
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649 p = ParsedString(result.args) |
| 230 | 650 p.parsed = result |
| 295 | 651 p.parser = self.parsed |
| 230 | 652 for (key, val) in kwargs.items(): |
| 653 p.parsed[key] = val | |
| 654 return p | |
| 655 | |
| 656 def postparsing_precmd(self, statement): | |
| 657 stop = 0 | |
| 658 return stop, statement | |
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659 |
| 230 | 660 def postparsing_postcmd(self, stop): |
| 661 return stop | |
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662 def func_named(self, arg): |
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663 result = None |
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664 target = 'do_' + arg |
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665 if target in dir(self): |
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666 result = target |
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667 else: |
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668 if self.abbrev: # accept shortened versions of commands |
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669 funcs = [fname for fname in self.keywords if fname.startswith(arg)] |
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670 if len(funcs) == 1: |
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671 result = 'do_' + funcs[0] |
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672 return result |
| 230 | 673 def onecmd(self, line): |
| 674 """Interpret the argument as though it had been typed in response | |
| 675 to the prompt. | |
| 676 | |
| 677 This may be overridden, but should not normally need to be; | |
| 678 see the precmd() and postcmd() methods for useful execution hooks. | |
| 679 The return value is a flag indicating whether interpretation of | |
| 680 commands by the interpreter should stop. | |
| 681 | |
| 682 This (`cmd2`) version of `onecmd` already override's `cmd`'s `onecmd`. | |
| 683 | |
| 684 """ | |
| 685 if not line: | |
| 686 return self.emptyline() | |
| 687 if not pyparsing.Or(self.commentGrammars).setParseAction(lambda x: '').transformString(line): | |
| 688 return 0 # command was empty except for comments | |
| 689 try: | |
| 690 statement = self.parsed(line) | |
| 691 while statement.parsed.multilineCommand and (statement.parsed.terminator == ''): | |
| 692 statement = '%s\n%s' % (statement.parsed.raw, | |
| 693 self.pseudo_raw_input(self.continuation_prompt)) | |
| 694 statement = self.parsed(statement) | |
| 695 except Exception, e: | |
|
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696 self.perror(e) |
| 230 | 697 return 0 |
| 246 | 698 if statement.parsed.command not in self.excludeFromHistory: |
| 699 self.history.append(statement.parsed.raw) | |
| 230 | 700 try: |
| 701 (stop, statement) = self.postparsing_precmd(statement) | |
| 702 except Exception, e: | |
|
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703 self.perror(e) |
| 230 | 704 return 0 |
| 705 if stop: | |
| 706 return self.postparsing_postcmd(stop) | |
| 707 | |
| 708 if not statement.parsed.command: | |
| 709 return self.postparsing_postcmd(stop=0) | |
| 710 | |
| 711 statekeeper = None | |
| 712 | |
| 713 if statement.parsed.pipeTo: | |
| 714 redirect = subprocess.Popen(statement.parsed.pipeTo, shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 715 statekeeper = Statekeeper(self, ('stdout',)) | |
| 716 self.stdout = redirect.stdin | |
| 717 elif statement.parsed.output: | |
| 718 statekeeper = Statekeeper(self, ('stdout',)) | |
| 719 if statement.parsed.outputTo: | |
| 720 mode = 'w' | |
| 721 if statement.parsed.output == '>>': | |
| 722 mode = 'a' | |
| 723 try: | |
| 724 self.stdout = open(os.path.expanduser(statement.parsed.outputTo), mode) | |
| 282 | 725 except Exception, e: |
|
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726 self.perror(e) |
| 230 | 727 return self.postparsing_postcmd(stop=0) |
| 728 else: | |
| 729 statekeeper = Statekeeper(self, ('stdout',)) | |
| 730 self.stdout = tempfile.TemporaryFile() | |
| 731 if statement.parsed.output == '>>': | |
|
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732 self.stdout.write(get_paste_buffer()) |
| 230 | 733 try: |
| 251 | 734 try: |
| 292 | 735 # "heart" of the command, replaces cmd's onecmd() |
|
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736 self.lastcmd = statement.parsed.raw |
| 275 | 737 funcname = self.func_named(statement.parsed.command) |
| 738 if not funcname: | |
|
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739 return self.postparsing_postcmd(self.default(statement.full_parsed_statement())) |
| 275 | 740 try: |
| 741 func = getattr(self, funcname) | |
| 742 except AttributeError: | |
|
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743 return self.postparsing_postcmd(self.default(statement.full_parsed_statement())) |
| 275 | 744 timestart = datetime.datetime.now() |
| 745 stop = func(statement) | |
| 746 if self.timing: | |
| 747 self.pfeedback('Elapsed: %s' % str(datetime.datetime.now() - timestart)) | |
| 748 except Exception, e: | |
| 276 | 749 self.perror(e, statement) |
| 230 | 750 finally: |
| 751 if statekeeper: | |
| 752 if statement.parsed.output and not statement.parsed.outputTo: | |
| 753 self.stdout.seek(0) | |
| 754 try: | |
|
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755 write_to_paste_buffer(self.stdout.read()) |
| 230 | 756 except Exception, e: |
|
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757 self.perror(e) |
| 230 | 758 elif statement.parsed.pipeTo: |
| 759 for result in redirect.communicate(): | |
| 760 statekeeper.stdout.write(result or '') | |
| 761 self.stdout.close() | |
| 762 statekeeper.restore() | |
| 763 | |
| 764 return self.postparsing_postcmd(stop) | |
| 765 | |
| 766 def pseudo_raw_input(self, prompt): | |
| 767 """copied from cmd's cmdloop; like raw_input, but accounts for changed stdin, stdout""" | |
| 768 | |
| 769 if self.use_rawinput: | |
| 770 try: | |
| 771 line = raw_input(prompt) | |
| 772 except EOFError: | |
| 773 line = 'EOF' | |
| 774 else: | |
| 775 self.stdout.write(prompt) | |
| 776 self.stdout.flush() | |
| 777 line = self.stdin.readline() | |
| 778 if not len(line): | |
| 779 line = 'EOF' | |
| 780 else: | |
| 781 if line[-1] == '\n': # this was always true in Cmd | |
| 782 line = line[:-1] | |
| 783 return line | |
| 282 | 784 |
| 230 | 785 def cmdloop(self, intro=None): |
| 786 """Repeatedly issue a prompt, accept input, parse an initial prefix | |
| 787 off the received input, and dispatch to action methods, passing them | |
| 788 the remainder of the line as argument. | |
| 789 """ | |
| 790 | |
| 791 # An almost perfect copy from Cmd; however, the pseudo_raw_input portion | |
| 792 # has been split out so that it can be called separately | |
| 793 | |
| 794 self.preloop() | |
| 795 if self.use_rawinput and self.completekey: | |
| 796 try: | |
| 797 import readline | |
| 798 self.old_completer = readline.get_completer() | |
| 799 readline.set_completer(self.complete) | |
| 800 readline.parse_and_bind(self.completekey+": complete") | |
| 801 except ImportError: | |
| 802 pass | |
| 803 try: | |
| 804 if intro is not None: | |
| 805 self.intro = intro | |
| 806 if self.intro: | |
| 807 self.stdout.write(str(self.intro)+"\n") | |
| 808 stop = None | |
| 809 while not stop: | |
| 810 if self.cmdqueue: | |
| 811 line = self.cmdqueue.pop(0) | |
| 812 else: | |
| 813 line = self.pseudo_raw_input(self.prompt) | |
| 814 if (self.echo) and (isinstance(self.stdin, file)): | |
| 815 self.stdout.write(line + '\n') | |
| 816 line = self.precmd(line) | |
| 817 stop = self.onecmd(line) | |
| 818 stop = self.postcmd(stop, line) | |
| 819 self.postloop() | |
| 820 finally: | |
| 821 if self.use_rawinput and self.completekey: | |
| 822 try: | |
| 823 import readline | |
| 824 readline.set_completer(self.old_completer) | |
| 825 except ImportError: | |
| 826 pass | |
| 827 return stop | |
| 828 | |
| 829 def do_EOF(self, arg): | |
| 830 return True | |
| 831 do_eof = do_EOF | |
| 290 | 832 |
| 230 | 833 def do_quit(self, arg): |
| 834 return self._STOP_AND_EXIT | |
| 835 do_exit = do_quit | |
| 836 do_q = do_quit | |
| 837 | |
| 309 | 838 def select(self, options, prompt='Your choice? '): |
| 839 '''Presents a numbered menu to the user. Modelled after | |
| 310 | 840 the bash shell's SELECT. Returns the item chosen. |
| 841 | |
| 842 Argument ``options`` can be: | |
| 843 a single string -> will be split into one-word options | |
| 844 a list of strings -> will be offered as options | |
| 845 a list of tuples -> interpreted as (value, text), so | |
| 846 that the return value can differ from | |
| 847 the text advertised to the user ''' | |
| 309 | 848 if isinstance(options, basestring): |
| 310 | 849 options = zip(options.split(), options.split()) |
| 850 fulloptions = [] | |
| 851 for opt in options: | |
| 852 if isinstance(opt, basestring): | |
| 853 fulloptions.append((opt, opt)) | |
| 854 else: | |
| 855 try: | |
| 856 fulloptions.append((opt[0], opt[1])) | |
| 857 except IndexError: | |
| 858 fulloptions.append((opt[0], opt[0])) | |
| 859 for (idx, (value, text)) in enumerate(fulloptions): | |
| 860 self.poutput(' %2d. %s\n' % (idx+1, text)) | |
| 309 | 861 while True: |
| 862 response = raw_input(prompt) | |
| 863 try: | |
| 864 response = int(response) | |
| 310 | 865 result = fulloptions[response - 1][0] |
| 309 | 866 break |
| 867 except ValueError: | |
| 868 pass # loop and ask again | |
| 869 return result | |
| 870 | |
| 290 | 871 @options([make_option('-l', '--long', action="store_true", |
| 872 help="describe function of parameter")]) | |
| 873 def do_show(self, arg, opts): | |
| 230 | 874 '''Shows value of a parameter.''' |
| 290 | 875 param = arg.strip().lower() |
| 876 result = {} | |
| 877 maxlen = 0 | |
| 878 for p in self.settable: | |
| 879 if (not param) or p.startswith(param): | |
| 880 result[p] = '%s: %s' % (p, str(getattr(self, p))) | |
| 881 maxlen = max(maxlen, len(result[p])) | |
| 882 if result: | |
| 883 for p in sorted(result): | |
| 884 if opts.long: | |
| 885 self.poutput('%s # %s' % (result[p].ljust(maxlen), self.settable[p])) | |
| 886 else: | |
| 887 self.poutput(result[p]) | |
| 230 | 888 else: |
| 290 | 889 self.perror("Parameter '%s' not supported (type 'show' for list of parameters)." % param) |
| 230 | 890 |
| 891 def do_set(self, arg): | |
| 290 | 892 ''' |
| 893 Sets a cmd2 parameter. Accepts abbreviated parameter names so long | |
| 894 as there is no ambiguity. Call without arguments for a list of | |
| 895 settable parameters with their values.''' | |
| 230 | 896 try: |
| 291 | 897 statement, paramName, val = arg.parsed.raw.split(None, 2) |
| 230 | 898 paramName = paramName.strip().lower() |
| 290 | 899 if paramName not in self.settable: |
| 291 | 900 hits = [p for p in self.settable if p.startswith(paramName)] |
| 290 | 901 if len(hits) == 1: |
| 902 paramName = hits[0] | |
| 903 else: | |
| 904 return self.do_show(paramName) | |
| 905 currentVal = getattr(self, paramName) | |
| 906 if (val[0] == val[-1]) and val[0] in ("'", '"'): | |
| 907 val = val[1:-1] | |
| 908 else: | |
| 909 val = cast(currentVal, val) | |
| 910 setattr(self, paramName, val) | |
| 911 self.stdout.write('%s - was: %s\nnow: %s\n' % (paramName, currentVal, val)) | |
| 912 if currentVal != val: | |
| 913 try: | |
| 914 onchange_hook = getattr(self, '_onchange_%s' % paramName) | |
| 915 onchange_hook(old=currentVal, new=val) | |
| 916 except AttributeError: | |
| 917 pass | |
| 230 | 918 except (ValueError, AttributeError, NotSettableError), e: |
| 919 self.do_show(arg) | |
| 920 | |
| 921 def do_pause(self, arg): | |
| 922 'Displays the specified text then waits for the user to press RETURN.' | |
| 923 raw_input(arg + '\n') | |
| 924 | |
| 925 def do_shell(self, arg): | |
| 926 'execute a command as if at the OS prompt.' | |
| 927 os.system(arg) | |
|
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928 |
| 233 | 929 def do_py(self, arg): |
| 230 | 930 ''' |
| 931 py <command>: Executes a Python command. | |
| 242 | 932 py: Enters interactive Python mode. |
| 933 End with `Ctrl-D` (Unix) / `Ctrl-Z` (Windows), `quit()`, 'exit()`. | |
| 241 | 934 Non-python commands can be issued with `cmd("your command")`. |
| 230 | 935 ''' |
| 280 | 936 self.pystate['self'] = self |
| 274 | 937 arg = arg.parsed.raw[2:].strip() |
| 230 | 938 if arg.strip(): |
|
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939 interp = InteractiveInterpreter(locals=self.pystate) |
| 233 | 940 interp.runcode(arg) |
| 230 | 941 else: |
|
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942 interp = MyInteractiveConsole(locals=self.pystate) |
| 233 | 943 def quit(): |
| 234 | 944 raise EmbeddedConsoleExit |
| 236 | 945 def onecmd(arg): |
| 946 return self.onecmd(arg + '\n') | |
| 233 | 947 self.pystate['quit'] = quit |
| 948 self.pystate['exit'] = quit | |
| 234 | 949 try: |
| 240 | 950 cprt = 'Type "help", "copyright", "credits" or "license" for more information.' |
|
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951 keepstate = Statekeeper(sys, ('stdin','stdout')) |
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952 sys.stdout = self.stdout |
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953 sys.stdin = self.stdin |
| 240 | 954 interp.interact(banner= "Python %s on %s\n%s\n(%s)\n%s" % |
| 955 (sys.version, sys.platform, cprt, self.__class__.__name__, self.do_py.__doc__)) | |
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956 except EmbeddedConsoleExit: |
| 245 | 957 pass |
| 958 keepstate.restore() | |
| 233 | 959 |
| 230 | 960 def do_history(self, arg): |
| 961 """history [arg]: lists past commands issued | |
| 962 | |
| 963 no arg -> list all | |
| 964 arg is integer -> list one history item, by index | |
| 965 arg is string -> string search | |
| 966 arg is /enclosed in forward-slashes/ -> regular expression search | |
| 967 """ | |
| 968 if arg: | |
| 969 history = self.history.get(arg) | |
| 970 else: | |
| 971 history = self.history | |
| 972 for hi in history: | |
| 973 self.stdout.write(hi.pr()) | |
| 974 def last_matching(self, arg): | |
| 975 try: | |
| 976 if arg: | |
| 977 return self.history.get(arg)[-1] | |
| 978 else: | |
| 979 return self.history[-1] | |
| 980 except IndexError: | |
| 981 return None | |
| 982 def do_list(self, arg): | |
| 983 """list [arg]: lists last command issued | |
| 984 | |
| 307 | 985 no arg -> list most recent command |
| 230 | 986 arg is integer -> list one history item, by index |
| 307 | 987 a..b, a:b, a:, ..b -> list spans from a (or start) to b (or end) |
| 308 | 988 arg is string -> list all commands matching string search |
| 230 | 989 arg is /enclosed in forward-slashes/ -> regular expression search |
| 990 """ | |
| 991 try: | |
| 308 | 992 history = self.history.span(arg or '-1') |
| 993 except IndexError: | |
| 994 history = self.history.search(arg) | |
| 995 for hi in history: | |
| 996 self.poutput(hi.pr()) | |
| 997 | |
| 230 | 998 do_hi = do_history |
| 999 do_l = do_list | |
| 1000 do_li = do_list | |
| 1001 | |
| 1002 def do_ed(self, arg): | |
| 1003 """ed: edit most recent command in text editor | |
| 1004 ed [N]: edit numbered command from history | |
| 1005 ed [filename]: edit specified file name | |
| 1006 | |
| 1007 commands are run after editor is closed. | |
| 1008 "set edit (program-name)" or set EDITOR environment variable | |
| 1009 to control which editing program is used.""" | |
| 1010 if not self.editor: | |
|
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1011 self.perror("Please use 'set editor' to specify your text editing program of choice.") |
| 230 | 1012 return |
| 1013 filename = self.default_file_name | |
| 1014 if arg: | |
| 1015 try: | |
| 1016 buffer = self.last_matching(int(arg)) | |
| 1017 except ValueError: | |
| 1018 filename = arg | |
| 1019 buffer = '' | |
| 1020 else: | |
| 1021 buffer = self.history[-1] | |
| 1022 | |
| 1023 if buffer: | |
| 1024 f = open(os.path.expanduser(filename), 'w') | |
| 1025 f.write(buffer or '') | |
| 1026 f.close() | |
| 1027 | |
| 1028 os.system('%s %s' % (self.editor, filename)) | |
| 1029 self.do__load(filename) | |
| 1030 do_edit = do_ed | |
| 1031 | |
| 1032 saveparser = (pyparsing.Optional(pyparsing.Word(pyparsing.nums)^'*')("idx") + | |
| 1033 pyparsing.Optional(pyparsing.Word(legalChars + '/\\'))("fname") + | |
| 1034 pyparsing.stringEnd) | |
| 1035 def do_save(self, arg): | |
| 1036 """`save [N] [filename.ext]` | |
| 1037 Saves command from history to file. | |
| 1038 N => Number of command (from history), or `*`; | |
| 1039 most recent command if omitted""" | |
| 1040 | |
| 1041 try: | |
| 1042 args = self.saveparser.parseString(arg) | |
| 1043 except pyparsing.ParseException: | |
|
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1044 self.perror(self.do_save.__doc__) |
| 230 | 1045 return |
| 1046 fname = args.fname or self.default_file_name | |
| 1047 if args.idx == '*': | |
| 1048 saveme = '\n\n'.join(self.history[:]) | |
| 1049 elif args.idx: | |
| 1050 saveme = self.history[int(args.idx)-1] | |
| 1051 else: | |
| 1052 saveme = self.history[-1] | |
| 1053 try: | |
| 1054 f = open(os.path.expanduser(fname), 'w') | |
| 1055 f.write(saveme) | |
| 1056 f.close() | |
|
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1057 self.pfeedback('Saved to %s' % (fname)) |
| 230 | 1058 except Exception, e: |
|
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1059 self.perror('Error saving %s: %s' % (fname, str(e))) |
| 230 | 1060 |
|
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1061 def read_file_or_url(self, fname): |
|
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1062 # TODO: not working on localhost |
|
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1063 if isinstance(fname, file): |
|
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1064 result = open(fname, 'r') |
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1065 else: |
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1066 match = self.urlre.match(fname) |
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1067 if match: |
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1068 result = urllib.urlopen(match.group(1)) |
| 230 | 1069 else: |
|
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1070 fname = os.path.expanduser(fname) |
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1071 try: |
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1072 result = open(os.path.expanduser(fname), 'r') |
|
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1073 except IOError: |
|
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1074 result = open('%s.%s' % (os.path.expanduser(fname), |
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1075 self.defaultExtension), 'r') |
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1076 return result |
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1077 |
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1078 def do__relative_load(self, arg=None): |
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1079 ''' |
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1080 Runs commands in script at file or URL; if this is called from within an |
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1081 already-running script, the filename will be interpreted relative to the |
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1082 already-running script's directory.''' |
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1083 if arg: |
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1084 arg = arg.split(None, 1) |
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1085 targetname, args = arg[0], (arg[1:] or [''])[0] |
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1086 targetname = os.path.join(self.current_script_dir or '', targetname) |
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1087 self.do__load('%s %s' % (targetname, args)) |
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1088 |
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1089 urlre = re.compile('(https?://[-\\w\\./]+)') |
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1090 def do_load(self, arg=None): |
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1091 """Runs script of command(s) from a file or URL.""" |
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1092 if arg is None: |
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1093 targetname = self.default_file_name |
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1094 else: |
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1095 arg = arg.split(None, 1) |
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1096 targetname, args = arg[0], (arg[1:] or [''])[0].strip() |
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1097 try: |
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1098 target = self.read_file_or_url(targetname) |
| 230 | 1099 except IOError, e: |
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1100 self.perror('Problem accessing script from %s: \n%s' % (targetname, e)) |
| 230 | 1101 return |
|
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1102 keepstate = Statekeeper(self, ('stdin','use_rawinput','prompt', |
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1103 'continuation_prompt','current_script_dir')) |
| 230 | 1104 self.stdin = target |
| 1105 self.use_rawinput = False | |
| 1106 self.prompt = self.continuation_prompt = '' | |
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1107 self.current_script_dir = os.path.split(targetname)[0] |
| 230 | 1108 stop = self.cmdloop() |
| 1109 self.stdin.close() | |
| 1110 keepstate.restore() | |
| 1111 self.lastcmd = '' | |
| 1112 return (stop == self._STOP_AND_EXIT) and self._STOP_AND_EXIT | |
| 1113 do__load = do_load # avoid an unfortunate legacy use of do_load from sqlpython | |
| 1114 | |
| 1115 def do_run(self, arg): | |
| 1116 """run [arg]: re-runs an earlier command | |
| 1117 | |
| 1118 no arg -> run most recent command | |
| 1119 arg is integer -> run one history item, by index | |
| 1120 arg is string -> run most recent command by string search | |
| 1121 arg is /enclosed in forward-slashes/ -> run most recent by regex | |
| 1122 """ | |
| 1123 'run [N]: runs the SQL that was run N commands ago' | |
| 1124 runme = self.last_matching(arg) | |
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1125 self.pfeedback(runme) |
| 230 | 1126 if runme: |
| 1127 runme = self.precmd(runme) | |
| 1128 stop = self.onecmd(runme) | |
| 1129 stop = self.postcmd(stop, runme) | |
| 1130 do_r = do_run | |
| 1131 | |
| 1132 def fileimport(self, statement, source): | |
| 1133 try: | |
| 1134 f = open(os.path.expanduser(source)) | |
| 1135 except IOError: | |
| 1136 self.stdout.write("Couldn't read from file %s\n" % source) | |
| 1137 return '' | |
| 1138 data = f.read() | |
| 1139 f.close() | |
| 1140 return data | |
| 1141 | |
| 1142 class HistoryItem(str): | |
| 305 | 1143 listformat = '-------------------------[%d]\n%s\n' |
| 230 | 1144 def __init__(self, instr): |
| 1145 str.__init__(self) | |
| 1146 self.lowercase = self.lower() | |
| 1147 self.idx = None | |
| 1148 def pr(self): | |
| 307 | 1149 return self.listformat % (self.idx, str(self)) |
| 230 | 1150 |
| 1151 class History(list): | |
| 305 | 1152 '''A list of HistoryItems that knows how to respond to user requests. |
| 1153 >>> h = History([HistoryItem('first'), HistoryItem('second'), HistoryItem('third'), HistoryItem('fourth')]) | |
| 1154 >>> h.span('-2..') | |
| 1155 ['third', 'fourth'] | |
| 1156 >>> h.span('2..3') | |
| 1157 ['second', 'third'] | |
| 1158 >>> h.span('3') | |
| 1159 ['third'] | |
| 1160 >>> h.span(':') | |
| 1161 ['first', 'second', 'third', 'fourth'] | |
| 1162 >>> h.span('2..') | |
| 1163 ['second', 'third', 'fourth'] | |
| 1164 >>> h.span('-1') | |
| 1165 ['fourth'] | |
| 1166 >>> h.span('-2..-3') | |
| 306 | 1167 ['third', 'second'] |
| 308 | 1168 >>> h.search('o') |
| 1169 ['second', 'fourth'] | |
| 1170 >>> h.search('/IR/') | |
| 1171 ['first', 'third'] | |
| 305 | 1172 ''' |
| 1173 def zero_based_index(self, onebased): | |
| 1174 result = onebased | |
| 1175 if result > 0: | |
| 1176 result -= 1 | |
| 1177 return result | |
| 1178 def to_index(self, raw): | |
| 1179 if raw: | |
| 1180 result = self.zero_based_index(int(raw)) | |
| 1181 else: | |
| 1182 result = None | |
| 1183 return result | |
| 308 | 1184 def search(self, target): |
| 1185 target = target.strip() | |
| 1186 if target[0] == target[-1] == '/' and len(target) > 1: | |
| 1187 target = target[1:-1] | |
| 1188 else: | |
| 1189 target = re.escape(target) | |
| 1190 pattern = re.compile(target, re.IGNORECASE) | |
| 1191 return [s for s in self if pattern.search(s)] | |
| 305 | 1192 spanpattern = re.compile(r'^\s*(?P<start>\-?\d+)?\s*(?P<separator>:|(\.{2,}))?\s*(?P<end>\-?\d+)?\s*$') |
| 1193 def span(self, raw): | |
| 308 | 1194 if raw.lower() in ('*', '-', 'all'): |
| 1195 raw = ':' | |
| 305 | 1196 results = self.spanpattern.search(raw) |
| 307 | 1197 if not results: |
| 1198 raise IndexError | |
| 305 | 1199 if not results.group('separator'): |
| 1200 return [self[self.to_index(results.group('start'))]] | |
| 1201 start = self.to_index(results.group('start')) | |
| 1202 end = self.to_index(results.group('end')) | |
| 1203 reverse = False | |
| 1204 if end is not None: | |
| 1205 if end < start: | |
| 1206 (start, end) = (end, start) | |
| 1207 reverse = True | |
| 1208 end += 1 | |
| 1209 result = self[start:end] | |
| 1210 if reverse: | |
| 1211 result.reverse() | |
| 1212 return result | |
| 1213 | |
| 1214 rangePattern = re.compile(r'^\s*(?P<start>[\d]+)?\s*\-\s*(?P<end>[\d]+)?\s*$') | |
| 230 | 1215 def append(self, new): |
| 1216 new = HistoryItem(new) | |
| 1217 list.append(self, new) | |
| 1218 new.idx = len(self) | |
| 1219 def extend(self, new): | |
| 1220 for n in new: | |
| 1221 self.append(n) | |
| 305 | 1222 |
| 1223 | |
| 1224 def get(self, getme=None, fromEnd=False): | |
| 1225 if not getme: | |
| 1226 return self | |
| 230 | 1227 try: |
| 1228 getme = int(getme) | |
| 1229 if getme < 0: | |
| 1230 return self[:(-1 * getme)] | |
| 1231 else: | |
| 1232 return [self[getme-1]] | |
| 1233 except IndexError: | |
| 1234 return [] | |
| 305 | 1235 except ValueError: |
| 1236 rangeResult = self.rangePattern.search(getme) | |
| 1237 if rangeResult: | |
| 1238 start = rangeResult.group('start') or None | |
| 1239 end = rangeResult.group('start') or None | |
| 1240 if start: | |
| 1241 start = int(start) - 1 | |
| 1242 if end: | |
| 1243 end = int(end) | |
| 1244 return self[start:end] | |
| 1245 | |
| 230 | 1246 getme = getme.strip() |
| 305 | 1247 |
| 230 | 1248 if getme.startswith(r'/') and getme.endswith(r'/'): |
| 1249 finder = re.compile(getme[1:-1], re.DOTALL | re.MULTILINE | re.IGNORECASE) | |
| 1250 def isin(hi): | |
| 1251 return finder.search(hi) | |
| 1252 else: | |
| 1253 def isin(hi): | |
| 1254 return (getme.lower() in hi.lowercase) | |
| 1255 return [itm for itm in self if isin(itm)] | |
| 1256 | |
| 1257 class NotSettableError(Exception): | |
| 1258 pass | |
| 1259 | |
| 1260 def cast(current, new): | |
| 1261 """Tries to force a new value into the same type as the current.""" | |
| 1262 typ = type(current) | |
| 1263 if typ == bool: | |
| 1264 try: | |
| 1265 return bool(int(new)) | |
| 1266 except ValueError, TypeError: | |
| 1267 pass | |
| 1268 try: | |
| 1269 new = new.lower() | |
| 1270 except: | |
| 1271 pass | |
| 1272 if (new=='on') or (new[0] in ('y','t')): | |
| 1273 return True | |
| 1274 if (new=='off') or (new[0] in ('n','f')): | |
| 1275 return False | |
| 1276 else: | |
| 1277 try: | |
| 1278 return typ(new) | |
| 1279 except: | |
| 1280 pass | |
| 1281 print "Problem setting parameter (now %s) to %s; incorrect type?" % (current, new) | |
| 1282 return current | |
| 1283 | |
| 1284 class Statekeeper(object): | |
| 1285 def __init__(self, obj, attribs): | |
| 1286 self.obj = obj | |
| 1287 self.attribs = attribs | |
| 282 | 1288 if self.obj: |
| 1289 self.save() | |
| 230 | 1290 def save(self): |
| 1291 for attrib in self.attribs: | |
| 1292 setattr(self, attrib, getattr(self.obj, attrib)) | |
| 1293 def restore(self): | |
| 282 | 1294 if self.obj: |
| 1295 for attrib in self.attribs: | |
| 1296 setattr(self.obj, attrib, getattr(self, attrib)) | |
| 230 | 1297 |
| 1298 class Borg(object): | |
| 1299 '''All instances of any Borg subclass will share state. | |
| 1300 from Python Cookbook, 2nd Ed., recipe 6.16''' | |
| 1301 _shared_state = {} | |
| 1302 def __new__(cls, *a, **k): | |
| 1303 obj = object.__new__(cls, *a, **k) | |
| 1304 obj.__dict__ = cls._shared_state | |
| 1305 return obj | |
| 1306 | |
| 1307 class OutputTrap(Borg): | |
| 1308 '''Instantiate an OutputTrap to divert/capture ALL stdout output. For use in unit testing. | |
| 1309 Call `tearDown()` to return to normal output.''' | |
| 1310 def __init__(self): | |
| 1311 self.old_stdout = sys.stdout | |
| 1312 self.trap = tempfile.TemporaryFile() | |
| 1313 sys.stdout = self.trap | |
| 1314 def read(self): | |
| 1315 self.trap.seek(0) | |
| 1316 result = self.trap.read() | |
| 1317 self.trap.truncate(0) | |
| 1318 return result.strip('\x00') | |
| 1319 def tearDown(self): | |
| 1320 sys.stdout = self.old_stdout | |
| 1321 | |
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1322 |
| 230 | 1323 class Cmd2TestCase(unittest.TestCase): |
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1324 '''Subclass this, setting CmdApp, to make a unittest.TestCase class |
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1325 that will execute the commands in a transcript file and expect the results shown. |
| 230 | 1326 See example.py''' |
| 1327 CmdApp = None | |
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1328 def fetchTranscripts(self): |
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1329 self.transcripts = {} |
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1330 for fileset in self.CmdApp.testfiles: |
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1331 for fname in glob.glob(fileset): |
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1332 tfile = open(fname) |
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1333 self.transcripts[fname] = iter(tfile.readlines()) |
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1334 tfile.close() |
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1335 if not len(self.transcripts): |
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1336 raise StandardError, "No test files found - nothing to test." |
| 230 | 1337 def setUp(self): |
| 1338 if self.CmdApp: | |
| 1339 self.outputTrap = OutputTrap() | |
| 1340 self.cmdapp = self.CmdApp() | |
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1341 self.fetchTranscripts() |
| 230 | 1342 def testall(self): |
| 1343 if self.CmdApp: | |
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1344 its = sorted(self.transcripts.items()) |
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1345 for (fname, transcript) in its: |
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1346 self._test_transcript(fname, transcript) |
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1347 regexPattern = pyparsing.QuotedString(quoteChar=r'/', escChar='\\', multiline=True, unquoteResults=True) |
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1348 regexPattern.ignore(pyparsing.cStyleComment) |
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1349 notRegexPattern = pyparsing.Word(pyparsing.printables) |
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1350 notRegexPattern.setParseAction(lambda t: re.escape(t[0])) |
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1351 expectationParser = regexPattern | notRegexPattern |
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1352 endStrippingRegex = re.compile(r'[ \t]*\n') |
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1353 def _test_transcript(self, fname, transcript): |
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1354 lineNum = 0 |
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1355 try: |
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1356 line = transcript.next() |
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1357 while True: |
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1358 while not line.startswith(self.cmdapp.prompt): |
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1359 line = transcript.next() |
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1360 command = [line[len(self.cmdapp.prompt):]] |
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1361 line = transcript.next() |
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1362 while line.startswith(self.cmdapp.continuation_prompt): |
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1363 command.append(line[len(self.cmdapp.continuation_prompt):]) |
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1364 line = transcript.next() |
| 305 | 1365 command = ''.join(command).strip() |
| 1366 self.cmdapp.onecmd(command) | |
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1367 result = self.outputTrap.read().strip() |
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1368 if line.startswith(self.cmdapp.prompt): |
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1369 message = '\nFile %s, line %d\nCommand was:\n%s\nExpected: (nothing)\nGot:\n%s\n'%\ |
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1370 (fname, lineNum, command, result) |
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1371 self.assert_(not(result.strip()), message) |
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1372 continue |
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1373 expected = [] |
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1374 while not line.startswith(self.cmdapp.prompt): |
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1375 expected.append(line) |
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1376 line = transcript.next() |
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1377 expected = ''.join(expected).strip() |
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1378 message = '\nFile %s, line %d\nCommand was:\n%s\nExpected:\n%s\nGot:\n%s\n'%\ |
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1379 (fname, lineNum, command, expected, result) |
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1380 expected = self.expectationParser.transformString(expected) |
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1381 expected = self.endStrippingRegex.sub('\s*\n', expected) |
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1382 self.assert_(re.match(expected, result, re.MULTILINE | re.DOTALL), message) |
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1383 except StopIteration: |
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1384 pass |
| 230 | 1385 def tearDown(self): |
| 1386 if self.CmdApp: | |
| 1387 self.outputTrap.tearDown() | |
| 1388 | |
| 1389 if __name__ == '__main__': | |
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1390 doctest.testmod(optionflags = doctest.NORMALIZE_WHITESPACE) |
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1391 |
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1392 ''' |
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1393 To make your application transcript-testable, add text like this to your .py file |
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1394 (replacing CmdLineApp with your own application class's name). Then, a cut-and-pasted |
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1395 version of a successful session with your application, saved as a text file, can serve |
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1396 as a test for future |
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1397 |
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1398 Invoke the test later with `python myapplication.py --test mytranscripttestfile.ext` |
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1399 Wildcards can be used to test against multiple transcript files. |
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1400 |
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1401 |
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1402 class TestMyAppCase(Cmd2TestCase): |
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1403 CmdApp = CmdLineApp |
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1404 parser = optparse.OptionParser() |
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1405 parser.add_option('-t', '--test', dest='test', action="store_true", |
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1406 help='Test against transcript(s) in FILE (wildcards OK)') |
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1407 (callopts, callargs) = parser.parse_args() |
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1408 if callopts.test: |
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1409 CmdLineApp.testfiles = callargs |
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1410 sys.argv = [sys.argv[0]] # the --test argument upsets unittest.main() |
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1411 unittest.main() |
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1412 else: |
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1413 CmdLineApp().cmdloop() |
| 286 | 1414 ''' |