Mercurial > python-cmd2
annotate cmd2.py @ 309:1941e54cb776
added bash-style SELECT
| author | catherine@dellzilla |
|---|---|
| date | Fri, 29 Jan 2010 10:32:40 -0500 |
| parents | 4e9011c3f732 |
| children | 9d91406ca3a7 |
| 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) | |
| 16 | |
| 17 Note that redirection with > and | will only work if `self.stdout.write()` | |
| 18 is used in place of `print`. The standard library's `cmd` module is | |
| 19 written to use `self.stdout.write()`, | |
| 20 | |
| 21 - Catherine Devlin, Jan 03 2008 - catherinedevlin.blogspot.com | |
| 22 | |
| 23 mercurial repository at http://www.assembla.com/wiki/show/python-cmd2 | |
| 24 """ | |
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25 import cmd |
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26 import re |
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27 import os |
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28 import sys |
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29 import optparse |
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30 import subprocess |
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31 import tempfile |
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32 import doctest |
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33 import unittest |
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34 import datetime |
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35 import urllib |
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36 import glob |
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37 import traceback |
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38 from code import InteractiveConsole, InteractiveInterpreter, softspace |
| 230 | 39 from optparse import make_option |
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40 |
| 309 | 41 if sys.version_info[0] > 2: |
| 42 import pyparsing_py3 as pyparsing | |
| 43 else: | |
| 44 import pyparsing | |
| 45 | |
| 280 | 46 __version__ = '0.5.6' |
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47 |
| 230 | 48 class OptionParser(optparse.OptionParser): |
| 49 def exit(self, status=0, msg=None): | |
| 50 self.values._exit = True | |
| 51 if msg: | |
| 52 print msg | |
| 53 | |
| 54 def print_help(self, *args, **kwargs): | |
| 55 try: | |
| 56 print self._func.__doc__ | |
| 57 except AttributeError: | |
| 58 pass | |
| 59 optparse.OptionParser.print_help(self, *args, **kwargs) | |
| 60 | |
| 61 def error(self, msg): | |
| 62 """error(msg : string) | |
| 63 | |
| 64 Print a usage message incorporating 'msg' to stderr and exit. | |
| 65 If you override this in a subclass, it should not return -- it | |
| 66 should either exit or raise an exception. | |
| 67 """ | |
| 68 raise | |
| 69 | |
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70 def remaining_args(oldArgs, newArgList): |
| 230 | 71 ''' |
| 285 | 72 Preserves the spacing originally in the argument after |
| 73 the removal of options. | |
| 74 | |
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75 >>> remaining_args('-f bar bar cow', ['bar', 'cow']) |
| 230 | 76 'bar cow' |
| 77 ''' | |
| 78 pattern = '\s+'.join(re.escape(a) for a in newArgList) + '\s*$' | |
| 79 matchObj = re.search(pattern, oldArgs) | |
| 80 return oldArgs[matchObj.start():] | |
| 280 | 81 |
| 82 def _attr_get_(obj, attr): | |
| 83 '''Returns an attribute's value, or None (no error) if undefined. | |
| 286 | 84 Analagous to .get() for dictionaries. Useful when checking for |
| 85 value of options that may not have been defined on a given | |
| 86 method.''' | |
| 280 | 87 try: |
| 88 return getattr(obj, attr) | |
| 89 except AttributeError: | |
| 90 return None | |
| 283 | 91 |
| 92 optparse.Values.get = _attr_get_ | |
| 93 | |
| 230 | 94 def options(option_list): |
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95 '''Used as a decorator and passed a list of optparse-style options, |
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96 alters a cmd2 methodo populate its ``opts`` argument from its |
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97 raw text argument. |
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98 |
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99 Example: transform |
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100 def do_something(self, arg): |
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101 |
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102 into |
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103 @options([make_option('-q', '--quick', action="store_true", |
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104 help="Makes things fast")]) |
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105 def do_something(self, arg, opts): |
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106 if opts.quick: |
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107 self.fast_button = True |
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108 ''' |
| 296 | 109 if not isinstance(option_list, list): |
| 298 | 110 option_list = [option_list] |
| 230 | 111 def option_setup(func): |
| 112 optionParser = OptionParser() | |
| 113 for opt in option_list: | |
| 114 optionParser.add_option(opt) | |
| 115 optionParser.set_usage("%s [options] arg" % func.__name__.strip('do_')) | |
| 116 optionParser._func = func | |
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117 def new_func(instance, arg): |
| 230 | 118 try: |
| 302 | 119 opts, newArgList = optionParser.parse_args(arg.split()) |
| 285 | 120 # Must find the remaining args in the original argument list, but |
| 121 # mustn't include the command itself | |
| 302 | 122 #if hasattr(arg, 'parsed') and newArgList[0] == arg.parsed.command: |
| 123 # newArgList = newArgList[1:] | |
| 124 newArgs = remaining_args(arg, newArgList) | |
| 301 | 125 if isinstance(arg, ParsedString): |
| 126 arg = arg.with_args_replaced(newArgs) | |
| 127 else: | |
| 128 arg = newArgs | |
| 230 | 129 except (optparse.OptionValueError, optparse.BadOptionError, |
| 130 optparse.OptionError, optparse.AmbiguousOptionError, | |
| 131 optparse.OptionConflictError), e: | |
| 132 print e | |
| 133 optionParser.print_help() | |
| 134 return | |
| 135 if hasattr(opts, '_exit'): | |
| 136 return None | |
| 137 result = func(instance, arg, opts) | |
| 138 return result | |
| 289 | 139 new_func.__doc__ = '%s\n%s' % (func.__doc__, optionParser.format_help()) |
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140 return new_func |
| 230 | 141 return option_setup |
| 142 | |
| 143 class PasteBufferError(EnvironmentError): | |
| 144 if sys.platform[:3] == 'win': | |
| 145 errmsg = """Redirecting to or from paste buffer requires pywin32 | |
| 146 to be installed on operating system. | |
| 147 Download from http://sourceforge.net/projects/pywin32/""" | |
| 148 else: | |
| 149 errmsg = """Redirecting to or from paste buffer requires xclip | |
| 150 to be installed on operating system. | |
| 151 On Debian/Ubuntu, 'sudo apt-get install xclip' will install it.""" | |
| 152 def __init__(self): | |
| 153 Exception.__init__(self, self.errmsg) | |
| 154 | |
| 155 pastebufferr = """Redirecting to or from paste buffer requires %s | |
| 156 to be installed on operating system. | |
| 157 %s""" | |
| 286 | 158 |
| 230 | 159 if subprocess.mswindows: |
| 160 try: | |
| 161 import win32clipboard | |
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162 def get_paste_buffer(): |
| 230 | 163 win32clipboard.OpenClipboard(0) |
| 164 try: | |
| 165 result = win32clipboard.GetClipboardData() | |
| 166 except TypeError: | |
| 167 result = '' #non-text | |
| 168 win32clipboard.CloseClipboard() | |
| 169 return result | |
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170 def write_to_paste_buffer(txt): |
| 230 | 171 win32clipboard.OpenClipboard(0) |
| 172 win32clipboard.EmptyClipboard() | |
| 173 win32clipboard.SetClipboardText(txt) | |
| 174 win32clipboard.CloseClipboard() | |
| 175 except ImportError: | |
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176 def get_paste_buffer(*args): |
| 230 | 177 raise OSError, pastebufferr % ('pywin32', 'Download from http://sourceforge.net/projects/pywin32/') |
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178 setPasteBuffer = get_paste_buffer |
| 230 | 179 else: |
| 180 can_clip = False | |
| 181 try: | |
| 182 subprocess.check_call('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 183 can_clip = True | |
| 184 except AttributeError: # check_call not defined, Python < 2.5 | |
| 185 teststring = 'Testing for presence of xclip.' | |
| 186 xclipproc = subprocess.Popen('xclip -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 187 xclipproc.stdin.write(teststring) | |
| 188 xclipproc.stdin.close() | |
| 189 xclipproc = subprocess.Popen('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 190 if xclipproc.stdout.read() == teststring: | |
| 191 can_clip = True | |
| 192 except (subprocess.CalledProcessError, OSError, IOError): | |
| 193 pass | |
| 194 if can_clip: | |
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195 def get_paste_buffer(): |
| 230 | 196 xclipproc = subprocess.Popen('xclip -o -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) |
| 197 return xclipproc.stdout.read() | |
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198 def write_to_paste_buffer(txt): |
| 230 | 199 xclipproc = subprocess.Popen('xclip -sel clip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) |
| 200 xclipproc.stdin.write(txt) | |
| 201 xclipproc.stdin.close() | |
| 202 # but we want it in both the "primary" and "mouse" clipboards | |
| 203 xclipproc = subprocess.Popen('xclip', shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 204 xclipproc.stdin.write(txt) | |
| 205 xclipproc.stdin.close() | |
| 206 else: | |
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207 def get_paste_buffer(*args): |
| 230 | 208 raise OSError, pastebufferr % ('xclip', 'On Debian/Ubuntu, install with "sudo apt-get install xclip"') |
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209 setPasteBuffer = get_paste_buffer |
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210 writeToPasteBuffer = get_paste_buffer |
| 230 | 211 |
| 212 pyparsing.ParserElement.setDefaultWhitespaceChars(' \t') | |
| 213 | |
| 214 class ParsedString(str): | |
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215 def full_parsed_statement(self): |
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216 new = ParsedString('%s %s' % (self.parsed.command, self.parsed.args)) |
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217 new.parsed = self.parsed |
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218 new.parser = self.parser |
| 301 | 219 return new |
| 220 def with_args_replaced(self, newargs): | |
| 221 new = ParsedString(newargs) | |
| 222 new.parsed = self.parsed | |
| 223 new.parser = self.parser | |
| 224 new.parsed['args'] = newargs | |
| 225 new.parsed.statement['args'] = newargs | |
| 226 return new | |
| 230 | 227 |
| 228 class SkipToLast(pyparsing.SkipTo): | |
| 229 def parseImpl( self, instring, loc, doActions=True ): | |
| 230 resultStore = [] | |
| 231 startLoc = loc | |
| 232 instrlen = len(instring) | |
| 233 expr = self.expr | |
| 234 failParse = False | |
| 235 while loc <= instrlen: | |
| 236 try: | |
| 237 if self.failOn: | |
| 238 failParse = True | |
| 239 self.failOn.tryParse(instring, loc) | |
| 240 failParse = False | |
| 241 loc = expr._skipIgnorables( instring, loc ) | |
| 242 expr._parse( instring, loc, doActions=False, callPreParse=False ) | |
| 243 skipText = instring[startLoc:loc] | |
| 244 if self.includeMatch: | |
| 245 loc,mat = expr._parse(instring,loc,doActions,callPreParse=False) | |
| 246 if mat: | |
| 247 skipRes = ParseResults( skipText ) | |
| 248 skipRes += mat | |
| 249 resultStore.append((loc, [ skipRes ])) | |
| 250 else: | |
| 251 resultStore,append((loc, [ skipText ])) | |
| 252 else: | |
| 253 resultStore.append((loc, [ skipText ])) | |
| 254 loc += 1 | |
| 255 except (pyparsing.ParseException,IndexError): | |
| 256 if failParse: | |
| 257 raise | |
| 258 else: | |
| 259 loc += 1 | |
| 260 if resultStore: | |
| 261 return resultStore[-1] | |
| 262 else: | |
| 263 exc = self.myException | |
| 264 exc.loc = loc | |
| 265 exc.pstr = instring | |
| 266 raise exc | |
| 267 | |
| 268 def replace_with_file_contents(fname): | |
| 269 if fname: | |
| 270 try: | |
| 271 result = open(os.path.expanduser(fname[0])).read() | |
| 272 except IOError: | |
| 273 result = '< %s' % fname[0] # wasn't a file after all | |
| 274 else: | |
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275 result = get_paste_buffer() |
| 233 | 276 return result |
| 277 | |
| 234 | 278 class EmbeddedConsoleExit(Exception): |
| 279 pass | |
| 280 | |
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281 class MyInteractiveConsole(InteractiveConsole): |
| 234 | 282 def runcode(self, code): |
| 283 """Execute a code object. | |
| 284 | |
| 285 When an exception occurs, self.showtraceback() is called to | |
| 286 display a traceback. All exceptions are caught except | |
| 287 SystemExit, which is reraised. | |
| 288 | |
| 289 A note about KeyboardInterrupt: this exception may occur | |
| 290 elsewhere in this code, and may not always be caught. The | |
| 291 caller should be prepared to deal with it. | |
| 292 | |
| 293 Copied directly from code.InteractiveInterpreter, except for | |
| 294 EmbeddedConsoleExit exceptions. | |
| 295 """ | |
| 296 try: | |
| 297 exec code in self.locals | |
| 298 except (SystemExit, EmbeddedConsoleExit): | |
| 299 raise | |
| 300 except: | |
| 301 self.showtraceback() | |
| 302 else: | |
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303 if softspace(sys.stdout, 0): |
| 234 | 304 print |
| 305 | |
| 290 | 306 def ljust(x, width, fillchar=' '): |
| 307 'analogous to str.ljust, but works for lists' | |
| 308 if hasattr(x, 'ljust'): | |
| 309 return x.ljust(width, fillchar) | |
| 310 else: | |
| 311 if len(x) < width: | |
| 312 x = (x + [fillchar] * width)[:width] | |
| 313 return x | |
| 314 | |
| 230 | 315 class Cmd(cmd.Cmd): |
| 316 echo = False | |
| 286 | 317 case_insensitive = True # Commands recognized regardless of case |
| 230 | 318 continuation_prompt = '> ' |
| 286 | 319 timing = False # Prints elapsed time for each command |
| 320 # make sure your terminators are not in legalChars! | |
| 321 legalChars = '!#$%.:?@_' + pyparsing.alphanums + pyparsing.alphas8bit | |
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322 shortcuts = {'?': 'help', '!': 'shell', '@': 'load', '@@': '_relative_load'} |
| 230 | 323 excludeFromHistory = '''run r list l history hi ed edit li eof'''.split() |
| 324 noSpecialParse = 'set ed edit exit'.split() | |
| 286 | 325 defaultExtension = 'txt' # For ``save``, ``load``, etc. |
| 326 default_file_name = 'command.txt' # For ``save``, ``load``, etc. | |
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327 abbrev = True # Abbreviated commands recognized |
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328 current_script_dir = None |
| 245 | 329 reserved_words = [] |
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330 feedback_to_output = False # Do include nonessentials in >, | output |
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331 quiet = False # Do not suppress nonessential output |
| 298 | 332 debug = True |
| 290 | 333 settable = ''' |
| 334 prompt | |
| 335 continuation_prompt | |
| 336 debug | |
| 337 default_file_name for `save`, `load`, etc. | |
| 338 editor | |
| 339 case_insensitive upper- and lower-case both OK | |
| 340 feedback_to_output include nonessentials in `|`, `>` results | |
| 341 quiet | |
| 342 echo Echo command issued into output | |
| 343 timing Report execution times | |
| 344 abbrev Accept abbreviated commands | |
| 345 '''.splitlines() | |
| 230 | 346 |
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347 def poutput(self, msg): |
| 284 | 348 if msg: |
| 349 self.stdout.write(msg) | |
| 350 if msg[-1] != '\n': | |
| 351 self.stdout.write('\n') | |
| 276 | 352 def perror(self, errmsg, statement=None): |
| 282 | 353 if self.debug: |
| 354 traceback.print_exc() | |
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355 print str(errmsg) |
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356 def pfeedback(self, msg): |
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357 """For printing nonessential feedback. Can be silenced with `quiet`. |
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358 Inclusion in redirected output is controlled by `feedback_to_output`.""" |
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359 if not self.quiet: |
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360 if self.feedback_to_output: |
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361 self.poutput(msg) |
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362 else: |
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363 print msg |
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364 _STOP_AND_EXIT = 2 |
| 230 | 365 editor = os.environ.get('EDITOR') |
| 366 if not editor: | |
| 367 if sys.platform[:3] == 'win': | |
| 368 editor = 'notepad' | |
| 369 else: | |
| 370 for editor in ['gedit', 'kate', 'vim', 'emacs', 'nano', 'pico']: | |
| 371 if not os.system('which %s' % (editor)): | |
| 372 break | |
| 373 | |
| 374 def do_cmdenvironment(self, args): | |
| 375 '''Summary report of interactive parameters.''' | |
| 376 self.stdout.write(""" | |
| 377 Commands are %(casesensitive)scase-sensitive. | |
| 378 Commands may be terminated with: %(terminators)s | |
| 237 | 379 Settable parameters: %(settable)s\n""" % \ |
| 230 | 380 { 'casesensitive': (self.case_insensitive and 'not ') or '', |
| 381 'terminators': str(self.terminators), | |
| 382 'settable': ' '.join(self.settable) | |
| 383 }) | |
| 384 | |
| 385 def do_help(self, arg): | |
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386 if arg: |
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387 funcname = self.func_named(arg) |
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388 if funcname: |
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389 fn = getattr(self, funcname) |
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390 try: |
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391 fn.optionParser.print_help(file=self.stdout) |
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392 except AttributeError: |
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393 cmd.Cmd.do_help(self, funcname[3:]) |
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394 else: |
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395 cmd.Cmd.do_help(self, arg) |
| 230 | 396 |
| 397 def __init__(self, *args, **kwargs): | |
| 398 cmd.Cmd.__init__(self, *args, **kwargs) | |
| 271 | 399 self.initial_stdout = sys.stdout |
| 230 | 400 self.history = History() |
| 401 self._init_parser() | |
| 402 self.pystate = {} | |
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403 self.shortcuts = sorted(self.shortcuts.items(), reverse=True) |
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404 self.keywords = self.reserved_words + [fname[3:] for fname in dir(self) |
| 290 | 405 if fname.startswith('do_')] |
| 406 self.settable = (l.strip() for l in self.settable if l.strip()) | |
| 407 self.settable = dict(ljust(l.split(None,1), 2, '') for l in self.settable) | |
| 408 | |
| 230 | 409 def do_shortcuts(self, args): |
| 410 """Lists single-key shortcuts available.""" | |
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411 result = "\n".join('%s: %s' % (sc[0], sc[1]) for sc in sorted(self.shortcuts)) |
| 230 | 412 self.stdout.write("Single-key shortcuts for other commands:\n%s\n" % (result)) |
| 413 | |
| 414 prefixParser = pyparsing.Empty() | |
| 415 commentGrammars = pyparsing.Or([pyparsing.pythonStyleComment, pyparsing.cStyleComment]) | |
| 416 commentGrammars.addParseAction(lambda x: '') | |
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417 commentInProgress = pyparsing.Literal('/*') + pyparsing.SkipTo( |
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418 pyparsing.stringEnd ^ '*/') |
| 230 | 419 terminators = [';'] |
| 420 blankLinesAllowed = False | |
| 421 multilineCommands = [] | |
| 422 | |
| 423 def _init_parser(self): | |
| 424 r''' | |
| 425 >>> c = Cmd() | |
| 426 >>> c.multilineCommands = ['multiline'] | |
| 427 >>> c.case_insensitive = True | |
| 428 >>> c._init_parser() | |
| 429 >>> print c.parser.parseString('').dump() | |
| 430 [] | |
| 431 >>> print c.parser.parseString('/* empty command */').dump() | |
| 432 [] | |
| 433 >>> print c.parser.parseString('plainword').dump() | |
| 434 ['plainword', ''] | |
| 435 - command: plainword | |
| 436 - statement: ['plainword', ''] | |
| 437 - command: plainword | |
| 438 >>> print c.parser.parseString('termbare;').dump() | |
| 439 ['termbare', '', ';', ''] | |
| 440 - command: termbare | |
| 441 - statement: ['termbare', '', ';'] | |
| 442 - command: termbare | |
| 443 - terminator: ; | |
| 444 - terminator: ; | |
| 445 >>> print c.parser.parseString('termbare; suffx').dump() | |
| 446 ['termbare', '', ';', 'suffx'] | |
| 447 - command: termbare | |
| 448 - statement: ['termbare', '', ';'] | |
| 449 - command: termbare | |
| 450 - terminator: ; | |
| 451 - suffix: suffx | |
| 452 - terminator: ; | |
| 453 >>> print c.parser.parseString('barecommand').dump() | |
| 454 ['barecommand', ''] | |
| 455 - command: barecommand | |
| 456 - statement: ['barecommand', ''] | |
| 457 - command: barecommand | |
| 458 >>> print c.parser.parseString('COMmand with args').dump() | |
| 459 ['command', 'with args'] | |
| 460 - args: with args | |
| 461 - command: command | |
| 462 - statement: ['command', 'with args'] | |
| 463 - args: with args | |
| 464 - command: command | |
| 465 >>> print c.parser.parseString('command with args and terminator; and suffix').dump() | |
| 466 ['command', 'with args and terminator', ';', 'and suffix'] | |
| 467 - args: with args and terminator | |
| 468 - command: command | |
| 469 - statement: ['command', 'with args and terminator', ';'] | |
| 470 - args: with args and terminator | |
| 471 - command: command | |
| 472 - terminator: ; | |
| 473 - suffix: and suffix | |
| 474 - terminator: ; | |
| 475 >>> print c.parser.parseString('simple | piped').dump() | |
| 476 ['simple', '', '|', ' piped'] | |
| 477 - command: simple | |
| 478 - pipeTo: piped | |
| 479 - statement: ['simple', ''] | |
| 480 - command: simple | |
| 481 >>> print c.parser.parseString('double-pipe || is not a pipe').dump() | |
| 482 ['double', '-pipe || is not a pipe'] | |
| 483 - args: -pipe || is not a pipe | |
| 484 - command: double | |
| 485 - statement: ['double', '-pipe || is not a pipe'] | |
| 486 - args: -pipe || is not a pipe | |
| 487 - command: double | |
| 488 >>> print c.parser.parseString('command with args, terminator;sufx | piped').dump() | |
| 489 ['command', 'with args, terminator', ';', 'sufx', '|', ' piped'] | |
| 490 - args: with args, terminator | |
| 491 - command: command | |
| 492 - pipeTo: piped | |
| 493 - statement: ['command', 'with args, terminator', ';'] | |
| 494 - args: with args, terminator | |
| 495 - command: command | |
| 496 - terminator: ; | |
| 497 - suffix: sufx | |
| 498 - terminator: ; | |
| 499 >>> print c.parser.parseString('output into > afile.txt').dump() | |
| 500 ['output', 'into', '>', 'afile.txt'] | |
| 501 - args: into | |
| 502 - command: output | |
| 503 - output: > | |
| 504 - outputTo: afile.txt | |
| 505 - statement: ['output', 'into'] | |
| 506 - args: into | |
| 507 - command: output | |
| 508 >>> print c.parser.parseString('output into;sufx | pipethrume plz > afile.txt').dump() | |
| 509 ['output', 'into', ';', 'sufx', '|', ' pipethrume plz', '>', 'afile.txt'] | |
| 510 - args: into | |
| 511 - command: output | |
| 512 - output: > | |
| 513 - outputTo: afile.txt | |
| 514 - pipeTo: pipethrume plz | |
| 515 - statement: ['output', 'into', ';'] | |
| 516 - args: into | |
| 517 - command: output | |
| 518 - terminator: ; | |
| 519 - suffix: sufx | |
| 520 - terminator: ; | |
| 521 >>> print c.parser.parseString('output to paste buffer >> ').dump() | |
| 522 ['output', 'to paste buffer', '>>', ''] | |
| 523 - args: to paste buffer | |
| 524 - command: output | |
| 525 - output: >> | |
| 526 - statement: ['output', 'to paste buffer'] | |
| 527 - args: to paste buffer | |
| 528 - command: output | |
| 529 >>> print c.parser.parseString('ignore the /* commented | > */ stuff;').dump() | |
| 530 ['ignore', 'the /* commented | > */ stuff', ';', ''] | |
| 531 - args: the /* commented | > */ stuff | |
| 532 - command: ignore | |
| 533 - statement: ['ignore', 'the /* commented | > */ stuff', ';'] | |
| 534 - args: the /* commented | > */ stuff | |
| 535 - command: ignore | |
| 536 - terminator: ; | |
| 537 - terminator: ; | |
| 538 >>> print c.parser.parseString('has > inside;').dump() | |
| 539 ['has', '> inside', ';', ''] | |
| 540 - args: > inside | |
| 541 - command: has | |
| 542 - statement: ['has', '> inside', ';'] | |
| 543 - args: > inside | |
| 544 - command: has | |
| 545 - terminator: ; | |
| 546 - terminator: ; | |
| 547 >>> print c.parser.parseString('multiline has > inside an unfinished command').dump() | |
| 548 ['multiline', ' has > inside an unfinished command'] | |
| 549 - multilineCommand: multiline | |
| 550 >>> print c.parser.parseString('multiline has > inside;').dump() | |
| 551 ['multiline', 'has > inside', ';', ''] | |
| 552 - args: has > inside | |
| 553 - multilineCommand: multiline | |
| 554 - statement: ['multiline', 'has > inside', ';'] | |
| 555 - args: has > inside | |
| 556 - multilineCommand: multiline | |
| 557 - terminator: ; | |
| 558 - terminator: ; | |
| 559 >>> print c.parser.parseString('multiline command /* with comment in progress;').dump() | |
| 272 | 560 ['multiline', ' command'] |
| 561 - multilineCommand: multiline | |
| 230 | 562 >>> print c.parser.parseString('multiline command /* with comment complete */ is done;').dump() |
| 563 ['multiline', 'command /* with comment complete */ is done', ';', ''] | |
| 564 - args: command /* with comment complete */ is done | |
| 565 - multilineCommand: multiline | |
| 566 - statement: ['multiline', 'command /* with comment complete */ is done', ';'] | |
| 567 - args: command /* with comment complete */ is done | |
| 568 - multilineCommand: multiline | |
| 569 - terminator: ; | |
| 570 - terminator: ; | |
| 571 >>> print c.parser.parseString('multiline command ends\n\n').dump() | |
| 572 ['multiline', 'command ends', '\n', '\n'] | |
| 573 - args: command ends | |
| 574 - multilineCommand: multiline | |
| 575 - statement: ['multiline', 'command ends', '\n', '\n'] | |
| 576 - args: command ends | |
| 577 - multilineCommand: multiline | |
| 578 - terminator: ['\n', '\n'] | |
| 579 - terminator: ['\n', '\n'] | |
| 580 ''' | |
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581 tstr = 'multiline command /* with comment complete */ is done;' |
| 230 | 582 outputParser = (pyparsing.Literal('>>') | (pyparsing.WordStart() + '>') | pyparsing.Regex('[^=]>'))('output') |
| 583 | |
| 584 terminatorParser = pyparsing.Or([(hasattr(t, 'parseString') and t) or pyparsing.Literal(t) for t in self.terminators])('terminator') | |
| 585 stringEnd = pyparsing.stringEnd ^ '\nEOF' | |
| 586 self.multilineCommand = pyparsing.Or([pyparsing.Keyword(c, caseless=self.case_insensitive) for c in self.multilineCommands])('multilineCommand') | |
| 587 oneLineCommand = (~self.multilineCommand + pyparsing.Word(self.legalChars))('command') | |
| 588 pipe = pyparsing.Keyword('|', identChars='|') | |
| 285 | 589 self.commentGrammars.ignore(pyparsing.quotedString).setParseAction(lambda x: '') |
| 230 | 590 afterElements = \ |
| 591 pyparsing.Optional(pipe + pyparsing.SkipTo(outputParser ^ stringEnd)('pipeTo')) + \ | |
| 592 pyparsing.Optional(outputParser + pyparsing.SkipTo(stringEnd).setParseAction(lambda x: x[0].strip())('outputTo')) | |
| 593 if self.case_insensitive: | |
| 594 self.multilineCommand.setParseAction(lambda x: x[0].lower()) | |
| 595 oneLineCommand.setParseAction(lambda x: x[0].lower()) | |
| 596 if self.blankLinesAllowed: | |
| 597 self.blankLineTerminationParser = pyparsing.NoMatch | |
| 598 else: | |
| 599 self.blankLineTerminator = (pyparsing.lineEnd + pyparsing.lineEnd)('terminator') | |
| 600 self.blankLineTerminator.setResultsName('terminator') | |
| 601 self.blankLineTerminationParser = ((self.multilineCommand ^ oneLineCommand) + pyparsing.SkipTo(self.blankLineTerminator).setParseAction(lambda x: x[0].strip())('args') + self.blankLineTerminator)('statement') | |
| 602 self.multilineParser = (((self.multilineCommand ^ oneLineCommand) + SkipToLast(terminatorParser).setParseAction(lambda x: x[0].strip())('args') + terminatorParser)('statement') + | |
| 603 pyparsing.SkipTo(outputParser ^ pipe ^ stringEnd).setParseAction(lambda x: x[0].strip())('suffix') + afterElements) | |
| 250 | 604 self.multilineParser.ignore(self.commentInProgress) |
| 230 | 605 self.singleLineParser = ((oneLineCommand + pyparsing.SkipTo(terminatorParser ^ stringEnd ^ pipe ^ outputParser).setParseAction(lambda x:x[0].strip())('args'))('statement') + |
| 606 pyparsing.Optional(terminatorParser) + afterElements) | |
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607 #self.multilineParser = self.multilineParser.setResultsName('multilineParser') |
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608 #self.singleLineParser = self.singleLineParser.setResultsName('singleLineParser') |
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609 self.blankLineTerminationParser = self.blankLineTerminationParser.setResultsName('statement') |
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610 self.parser = self.prefixParser + ( |
| 230 | 611 stringEnd | |
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612 self.multilineParser | |
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613 self.singleLineParser | |
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614 self.blankLineTerminationParser | |
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615 self.multilineCommand + pyparsing.SkipTo(stringEnd) |
| 230 | 616 ) |
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617 self.parser.ignore(pyparsing.quotedString).ignore(self.commentGrammars) |
| 230 | 618 |
| 619 inputMark = pyparsing.Literal('<') | |
| 620 inputMark.setParseAction(lambda x: '') | |
| 621 fileName = pyparsing.Word(self.legalChars + '/\\') | |
| 622 inputFrom = fileName('inputFrom') | |
| 623 inputFrom.setParseAction(replace_with_file_contents) | |
| 624 # a not-entirely-satisfactory way of distinguishing < as in "import from" from < | |
| 625 # as in "lesser than" | |
| 626 self.inputParser = inputMark + pyparsing.Optional(inputFrom) + pyparsing.Optional('>') + \ | |
| 627 pyparsing.Optional(fileName) + (pyparsing.stringEnd | '|') | |
| 628 self.inputParser.ignore(pyparsing.quotedString).ignore(self.commentGrammars).ignore(self.commentInProgress) | |
| 629 | |
| 630 def preparse(self, raw, **kwargs): | |
| 631 return raw | |
| 632 | |
| 633 def parsed(self, raw, **kwargs): | |
| 634 if isinstance(raw, ParsedString): | |
| 635 p = raw | |
| 636 else: | |
| 292 | 637 # preparse is an overridable hook; default makes no changes |
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638 s = self.preparse(raw, **kwargs) |
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639 s = self.inputParser.transformString(s.lstrip()) |
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640 s = self.commentGrammars.transformString(s) |
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641 for (shortcut, expansion) in self.shortcuts: |
| 230 | 642 if s.lower().startswith(shortcut): |
| 643 s = s.replace(shortcut, expansion + ' ', 1) | |
| 644 break | |
| 645 result = self.parser.parseString(s) | |
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646 result['raw'] = raw |
| 230 | 647 result['command'] = result.multilineCommand or result.command |
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648 p = ParsedString(result.args) |
| 230 | 649 p.parsed = result |
| 295 | 650 p.parser = self.parsed |
| 230 | 651 for (key, val) in kwargs.items(): |
| 652 p.parsed[key] = val | |
| 653 return p | |
| 654 | |
| 655 def postparsing_precmd(self, statement): | |
| 656 stop = 0 | |
| 657 return stop, statement | |
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658 |
| 230 | 659 def postparsing_postcmd(self, stop): |
| 660 return stop | |
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661 def func_named(self, arg): |
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662 result = None |
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663 target = 'do_' + arg |
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664 if target in dir(self): |
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665 result = target |
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666 else: |
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667 if self.abbrev: # accept shortened versions of commands |
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668 funcs = [fname for fname in self.keywords if fname.startswith(arg)] |
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669 if len(funcs) == 1: |
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670 result = 'do_' + funcs[0] |
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|
671 return result |
| 230 | 672 def onecmd(self, line): |
| 673 """Interpret the argument as though it had been typed in response | |
| 674 to the prompt. | |
| 675 | |
| 676 This may be overridden, but should not normally need to be; | |
| 677 see the precmd() and postcmd() methods for useful execution hooks. | |
| 678 The return value is a flag indicating whether interpretation of | |
| 679 commands by the interpreter should stop. | |
| 680 | |
| 681 This (`cmd2`) version of `onecmd` already override's `cmd`'s `onecmd`. | |
| 682 | |
| 683 """ | |
| 684 if not line: | |
| 685 return self.emptyline() | |
| 686 if not pyparsing.Or(self.commentGrammars).setParseAction(lambda x: '').transformString(line): | |
| 687 return 0 # command was empty except for comments | |
| 688 try: | |
| 689 statement = self.parsed(line) | |
| 690 while statement.parsed.multilineCommand and (statement.parsed.terminator == ''): | |
| 691 statement = '%s\n%s' % (statement.parsed.raw, | |
| 692 self.pseudo_raw_input(self.continuation_prompt)) | |
| 693 statement = self.parsed(statement) | |
| 694 except Exception, e: | |
|
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695 self.perror(e) |
| 230 | 696 return 0 |
| 246 | 697 if statement.parsed.command not in self.excludeFromHistory: |
| 698 self.history.append(statement.parsed.raw) | |
| 230 | 699 try: |
| 700 (stop, statement) = self.postparsing_precmd(statement) | |
| 701 except Exception, e: | |
|
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702 self.perror(e) |
| 230 | 703 return 0 |
| 704 if stop: | |
| 705 return self.postparsing_postcmd(stop) | |
| 706 | |
| 707 if not statement.parsed.command: | |
| 708 return self.postparsing_postcmd(stop=0) | |
| 709 | |
| 710 statekeeper = None | |
| 711 | |
| 712 if statement.parsed.pipeTo: | |
| 713 redirect = subprocess.Popen(statement.parsed.pipeTo, shell=True, stdout=subprocess.PIPE, stdin=subprocess.PIPE) | |
| 714 statekeeper = Statekeeper(self, ('stdout',)) | |
| 715 self.stdout = redirect.stdin | |
| 716 elif statement.parsed.output: | |
| 717 statekeeper = Statekeeper(self, ('stdout',)) | |
| 718 if statement.parsed.outputTo: | |
| 719 mode = 'w' | |
| 720 if statement.parsed.output == '>>': | |
| 721 mode = 'a' | |
| 722 try: | |
| 723 self.stdout = open(os.path.expanduser(statement.parsed.outputTo), mode) | |
| 282 | 724 except Exception, e: |
|
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725 self.perror(e) |
| 230 | 726 return self.postparsing_postcmd(stop=0) |
| 727 else: | |
| 728 statekeeper = Statekeeper(self, ('stdout',)) | |
| 729 self.stdout = tempfile.TemporaryFile() | |
| 730 if statement.parsed.output == '>>': | |
|
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731 self.stdout.write(get_paste_buffer()) |
| 230 | 732 try: |
| 251 | 733 try: |
| 292 | 734 # "heart" of the command, replaces cmd's onecmd() |
|
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735 self.lastcmd = statement.parsed.raw |
| 275 | 736 funcname = self.func_named(statement.parsed.command) |
| 737 if not funcname: | |
|
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738 return self.postparsing_postcmd(self.default(statement.full_parsed_statement())) |
| 275 | 739 try: |
| 740 func = getattr(self, funcname) | |
| 741 except AttributeError: | |
|
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742 return self.postparsing_postcmd(self.default(statement.full_parsed_statement())) |
| 275 | 743 timestart = datetime.datetime.now() |
| 744 stop = func(statement) | |
| 745 if self.timing: | |
| 746 self.pfeedback('Elapsed: %s' % str(datetime.datetime.now() - timestart)) | |
| 747 except Exception, e: | |
| 276 | 748 self.perror(e, statement) |
| 230 | 749 finally: |
| 750 if statekeeper: | |
| 751 if statement.parsed.output and not statement.parsed.outputTo: | |
| 752 self.stdout.seek(0) | |
| 753 try: | |
|
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754 write_to_paste_buffer(self.stdout.read()) |
| 230 | 755 except Exception, e: |
|
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756 self.perror(e) |
| 230 | 757 elif statement.parsed.pipeTo: |
| 758 for result in redirect.communicate(): | |
| 759 statekeeper.stdout.write(result or '') | |
| 760 self.stdout.close() | |
| 761 statekeeper.restore() | |
| 762 | |
| 763 return self.postparsing_postcmd(stop) | |
| 764 | |
| 765 def pseudo_raw_input(self, prompt): | |
| 766 """copied from cmd's cmdloop; like raw_input, but accounts for changed stdin, stdout""" | |
| 767 | |
| 768 if self.use_rawinput: | |
| 769 try: | |
| 770 line = raw_input(prompt) | |
| 771 except EOFError: | |
| 772 line = 'EOF' | |
| 773 else: | |
| 774 self.stdout.write(prompt) | |
| 775 self.stdout.flush() | |
| 776 line = self.stdin.readline() | |
| 777 if not len(line): | |
| 778 line = 'EOF' | |
| 779 else: | |
| 780 if line[-1] == '\n': # this was always true in Cmd | |
| 781 line = line[:-1] | |
| 782 return line | |
| 282 | 783 |
| 230 | 784 def cmdloop(self, intro=None): |
| 785 """Repeatedly issue a prompt, accept input, parse an initial prefix | |
| 786 off the received input, and dispatch to action methods, passing them | |
| 787 the remainder of the line as argument. | |
| 788 """ | |
| 789 | |
| 790 # An almost perfect copy from Cmd; however, the pseudo_raw_input portion | |
| 791 # has been split out so that it can be called separately | |
| 792 | |
| 793 self.preloop() | |
| 794 if self.use_rawinput and self.completekey: | |
| 795 try: | |
| 796 import readline | |
| 797 self.old_completer = readline.get_completer() | |
| 798 readline.set_completer(self.complete) | |
| 799 readline.parse_and_bind(self.completekey+": complete") | |
| 800 except ImportError: | |
| 801 pass | |
| 802 try: | |
| 803 if intro is not None: | |
| 804 self.intro = intro | |
| 805 if self.intro: | |
| 806 self.stdout.write(str(self.intro)+"\n") | |
| 807 stop = None | |
| 808 while not stop: | |
| 809 if self.cmdqueue: | |
| 810 line = self.cmdqueue.pop(0) | |
| 811 else: | |
| 812 line = self.pseudo_raw_input(self.prompt) | |
| 813 if (self.echo) and (isinstance(self.stdin, file)): | |
| 814 self.stdout.write(line + '\n') | |
| 815 line = self.precmd(line) | |
| 816 stop = self.onecmd(line) | |
| 817 stop = self.postcmd(stop, line) | |
| 818 self.postloop() | |
| 819 finally: | |
| 820 if self.use_rawinput and self.completekey: | |
| 821 try: | |
| 822 import readline | |
| 823 readline.set_completer(self.old_completer) | |
| 824 except ImportError: | |
| 825 pass | |
| 826 return stop | |
| 827 | |
| 828 def do_EOF(self, arg): | |
| 829 return True | |
| 830 do_eof = do_EOF | |
| 290 | 831 |
| 230 | 832 def do_quit(self, arg): |
| 833 return self._STOP_AND_EXIT | |
| 834 do_exit = do_quit | |
| 835 do_q = do_quit | |
| 836 | |
| 309 | 837 def select(self, options, prompt='Your choice? '): |
| 838 '''Presents a numbered menu to the user. Modelled after | |
| 839 the bash shell's SELECT. Returns the item chosen.''' | |
| 840 if isinstance(options, basestring): | |
| 841 options = options.split() | |
| 842 for (idx, opt) in enumerate(options): | |
| 843 self.poutput(' %2d. %s\n' % (idx+1, opt)) | |
| 844 while True: | |
| 845 response = raw_input(prompt) | |
| 846 try: | |
| 847 response = int(response) | |
| 848 result = options[response - 1] | |
| 849 break | |
| 850 except ValueError: | |
| 851 pass # loop and ask again | |
| 852 return result | |
| 853 | |
| 290 | 854 @options([make_option('-l', '--long', action="store_true", |
| 855 help="describe function of parameter")]) | |
| 856 def do_show(self, arg, opts): | |
| 230 | 857 '''Shows value of a parameter.''' |
| 290 | 858 param = arg.strip().lower() |
| 859 result = {} | |
| 860 maxlen = 0 | |
| 861 for p in self.settable: | |
| 862 if (not param) or p.startswith(param): | |
| 863 result[p] = '%s: %s' % (p, str(getattr(self, p))) | |
| 864 maxlen = max(maxlen, len(result[p])) | |
| 865 if result: | |
| 866 for p in sorted(result): | |
| 867 if opts.long: | |
| 868 self.poutput('%s # %s' % (result[p].ljust(maxlen), self.settable[p])) | |
| 869 else: | |
| 870 self.poutput(result[p]) | |
| 230 | 871 else: |
| 290 | 872 self.perror("Parameter '%s' not supported (type 'show' for list of parameters)." % param) |
| 230 | 873 |
| 874 def do_set(self, arg): | |
| 290 | 875 ''' |
| 876 Sets a cmd2 parameter. Accepts abbreviated parameter names so long | |
| 877 as there is no ambiguity. Call without arguments for a list of | |
| 878 settable parameters with their values.''' | |
| 230 | 879 try: |
| 291 | 880 statement, paramName, val = arg.parsed.raw.split(None, 2) |
| 230 | 881 paramName = paramName.strip().lower() |
| 290 | 882 if paramName not in self.settable: |
| 291 | 883 hits = [p for p in self.settable if p.startswith(paramName)] |
| 290 | 884 if len(hits) == 1: |
| 885 paramName = hits[0] | |
| 886 else: | |
| 887 return self.do_show(paramName) | |
| 888 currentVal = getattr(self, paramName) | |
| 889 if (val[0] == val[-1]) and val[0] in ("'", '"'): | |
| 890 val = val[1:-1] | |
| 891 else: | |
| 892 val = cast(currentVal, val) | |
| 893 setattr(self, paramName, val) | |
| 894 self.stdout.write('%s - was: %s\nnow: %s\n' % (paramName, currentVal, val)) | |
| 895 if currentVal != val: | |
| 896 try: | |
| 897 onchange_hook = getattr(self, '_onchange_%s' % paramName) | |
| 898 onchange_hook(old=currentVal, new=val) | |
| 899 except AttributeError: | |
| 900 pass | |
| 230 | 901 except (ValueError, AttributeError, NotSettableError), e: |
| 902 self.do_show(arg) | |
| 903 | |
| 904 def do_pause(self, arg): | |
| 905 'Displays the specified text then waits for the user to press RETURN.' | |
| 906 raw_input(arg + '\n') | |
| 907 | |
| 908 def do_shell(self, arg): | |
| 909 'execute a command as if at the OS prompt.' | |
| 910 os.system(arg) | |
|
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911 |
| 233 | 912 def do_py(self, arg): |
| 230 | 913 ''' |
| 914 py <command>: Executes a Python command. | |
| 242 | 915 py: Enters interactive Python mode. |
| 916 End with `Ctrl-D` (Unix) / `Ctrl-Z` (Windows), `quit()`, 'exit()`. | |
| 241 | 917 Non-python commands can be issued with `cmd("your command")`. |
| 230 | 918 ''' |
| 280 | 919 self.pystate['self'] = self |
| 274 | 920 arg = arg.parsed.raw[2:].strip() |
| 230 | 921 if arg.strip(): |
|
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922 interp = InteractiveInterpreter(locals=self.pystate) |
| 233 | 923 interp.runcode(arg) |
| 230 | 924 else: |
|
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925 interp = MyInteractiveConsole(locals=self.pystate) |
| 233 | 926 def quit(): |
| 234 | 927 raise EmbeddedConsoleExit |
| 236 | 928 def onecmd(arg): |
| 929 return self.onecmd(arg + '\n') | |
| 233 | 930 self.pystate['quit'] = quit |
| 931 self.pystate['exit'] = quit | |
| 234 | 932 try: |
| 240 | 933 cprt = 'Type "help", "copyright", "credits" or "license" for more information.' |
|
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934 keepstate = Statekeeper(sys, ('stdin','stdout')) |
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935 sys.stdout = self.stdout |
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936 sys.stdin = self.stdin |
| 240 | 937 interp.interact(banner= "Python %s on %s\n%s\n(%s)\n%s" % |
| 938 (sys.version, sys.platform, cprt, self.__class__.__name__, self.do_py.__doc__)) | |
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939 except EmbeddedConsoleExit: |
| 245 | 940 pass |
| 941 keepstate.restore() | |
| 233 | 942 |
| 230 | 943 def do_history(self, arg): |
| 944 """history [arg]: lists past commands issued | |
| 945 | |
| 946 no arg -> list all | |
| 947 arg is integer -> list one history item, by index | |
| 948 arg is string -> string search | |
| 949 arg is /enclosed in forward-slashes/ -> regular expression search | |
| 950 """ | |
| 951 if arg: | |
| 952 history = self.history.get(arg) | |
| 953 else: | |
| 954 history = self.history | |
| 955 for hi in history: | |
| 956 self.stdout.write(hi.pr()) | |
| 957 def last_matching(self, arg): | |
| 958 try: | |
| 959 if arg: | |
| 960 return self.history.get(arg)[-1] | |
| 961 else: | |
| 962 return self.history[-1] | |
| 963 except IndexError: | |
| 964 return None | |
| 965 def do_list(self, arg): | |
| 966 """list [arg]: lists last command issued | |
| 967 | |
| 307 | 968 no arg -> list most recent command |
| 230 | 969 arg is integer -> list one history item, by index |
| 307 | 970 a..b, a:b, a:, ..b -> list spans from a (or start) to b (or end) |
| 308 | 971 arg is string -> list all commands matching string search |
| 230 | 972 arg is /enclosed in forward-slashes/ -> regular expression search |
| 973 """ | |
| 974 try: | |
| 308 | 975 history = self.history.span(arg or '-1') |
| 976 except IndexError: | |
| 977 history = self.history.search(arg) | |
| 978 for hi in history: | |
| 979 self.poutput(hi.pr()) | |
| 980 | |
| 230 | 981 do_hi = do_history |
| 982 do_l = do_list | |
| 983 do_li = do_list | |
| 984 | |
| 985 def do_ed(self, arg): | |
| 986 """ed: edit most recent command in text editor | |
| 987 ed [N]: edit numbered command from history | |
| 988 ed [filename]: edit specified file name | |
| 989 | |
| 990 commands are run after editor is closed. | |
| 991 "set edit (program-name)" or set EDITOR environment variable | |
| 992 to control which editing program is used.""" | |
| 993 if not self.editor: | |
|
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994 self.perror("Please use 'set editor' to specify your text editing program of choice.") |
| 230 | 995 return |
| 996 filename = self.default_file_name | |
| 997 if arg: | |
| 998 try: | |
| 999 buffer = self.last_matching(int(arg)) | |
| 1000 except ValueError: | |
| 1001 filename = arg | |
| 1002 buffer = '' | |
| 1003 else: | |
| 1004 buffer = self.history[-1] | |
| 1005 | |
| 1006 if buffer: | |
| 1007 f = open(os.path.expanduser(filename), 'w') | |
| 1008 f.write(buffer or '') | |
| 1009 f.close() | |
| 1010 | |
| 1011 os.system('%s %s' % (self.editor, filename)) | |
| 1012 self.do__load(filename) | |
| 1013 do_edit = do_ed | |
| 1014 | |
| 1015 saveparser = (pyparsing.Optional(pyparsing.Word(pyparsing.nums)^'*')("idx") + | |
| 1016 pyparsing.Optional(pyparsing.Word(legalChars + '/\\'))("fname") + | |
| 1017 pyparsing.stringEnd) | |
| 1018 def do_save(self, arg): | |
| 1019 """`save [N] [filename.ext]` | |
| 1020 Saves command from history to file. | |
| 1021 N => Number of command (from history), or `*`; | |
| 1022 most recent command if omitted""" | |
| 1023 | |
| 1024 try: | |
| 1025 args = self.saveparser.parseString(arg) | |
| 1026 except pyparsing.ParseException: | |
|
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1027 self.perror(self.do_save.__doc__) |
| 230 | 1028 return |
| 1029 fname = args.fname or self.default_file_name | |
| 1030 if args.idx == '*': | |
| 1031 saveme = '\n\n'.join(self.history[:]) | |
| 1032 elif args.idx: | |
| 1033 saveme = self.history[int(args.idx)-1] | |
| 1034 else: | |
| 1035 saveme = self.history[-1] | |
| 1036 try: | |
| 1037 f = open(os.path.expanduser(fname), 'w') | |
| 1038 f.write(saveme) | |
| 1039 f.close() | |
|
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1040 self.pfeedback('Saved to %s' % (fname)) |
| 230 | 1041 except Exception, e: |
|
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1042 self.perror('Error saving %s: %s' % (fname, str(e))) |
| 230 | 1043 |
|
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1044 def read_file_or_url(self, fname): |
|
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1045 # TODO: not working on localhost |
|
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1046 if isinstance(fname, file): |
|
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1047 result = open(fname, 'r') |
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1048 else: |
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1049 match = self.urlre.match(fname) |
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1050 if match: |
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1051 result = urllib.urlopen(match.group(1)) |
| 230 | 1052 else: |
|
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1053 fname = os.path.expanduser(fname) |
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1054 try: |
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1055 result = open(os.path.expanduser(fname), 'r') |
|
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1056 except IOError: |
|
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1057 result = open('%s.%s' % (os.path.expanduser(fname), |
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1058 self.defaultExtension), 'r') |
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1059 return result |
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1060 |
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1061 def do__relative_load(self, arg=None): |
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1062 ''' |
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1063 Runs commands in script at file or URL; if this is called from within an |
|
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1064 already-running script, the filename will be interpreted relative to the |
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1065 already-running script's directory.''' |
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1066 if arg: |
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1067 arg = arg.split(None, 1) |
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1068 targetname, args = arg[0], (arg[1:] or [''])[0] |
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1069 targetname = os.path.join(self.current_script_dir or '', targetname) |
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1070 self.do__load('%s %s' % (targetname, args)) |
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1071 |
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1072 urlre = re.compile('(https?://[-\\w\\./]+)') |
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1073 def do_load(self, arg=None): |
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1074 """Runs script of command(s) from a file or URL.""" |
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1075 if arg is None: |
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1076 targetname = self.default_file_name |
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1077 else: |
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1078 arg = arg.split(None, 1) |
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1079 targetname, args = arg[0], (arg[1:] or [''])[0].strip() |
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1080 try: |
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1081 target = self.read_file_or_url(targetname) |
| 230 | 1082 except IOError, e: |
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1083 self.perror('Problem accessing script from %s: \n%s' % (targetname, e)) |
| 230 | 1084 return |
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1085 keepstate = Statekeeper(self, ('stdin','use_rawinput','prompt', |
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1086 'continuation_prompt','current_script_dir')) |
| 230 | 1087 self.stdin = target |
| 1088 self.use_rawinput = False | |
| 1089 self.prompt = self.continuation_prompt = '' | |
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1090 self.current_script_dir = os.path.split(targetname)[0] |
| 230 | 1091 stop = self.cmdloop() |
| 1092 self.stdin.close() | |
| 1093 keepstate.restore() | |
| 1094 self.lastcmd = '' | |
| 1095 return (stop == self._STOP_AND_EXIT) and self._STOP_AND_EXIT | |
| 1096 do__load = do_load # avoid an unfortunate legacy use of do_load from sqlpython | |
| 1097 | |
| 1098 def do_run(self, arg): | |
| 1099 """run [arg]: re-runs an earlier command | |
| 1100 | |
| 1101 no arg -> run most recent command | |
| 1102 arg is integer -> run one history item, by index | |
| 1103 arg is string -> run most recent command by string search | |
| 1104 arg is /enclosed in forward-slashes/ -> run most recent by regex | |
| 1105 """ | |
| 1106 'run [N]: runs the SQL that was run N commands ago' | |
| 1107 runme = self.last_matching(arg) | |
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1108 self.pfeedback(runme) |
| 230 | 1109 if runme: |
| 1110 runme = self.precmd(runme) | |
| 1111 stop = self.onecmd(runme) | |
| 1112 stop = self.postcmd(stop, runme) | |
| 1113 do_r = do_run | |
| 1114 | |
| 1115 def fileimport(self, statement, source): | |
| 1116 try: | |
| 1117 f = open(os.path.expanduser(source)) | |
| 1118 except IOError: | |
| 1119 self.stdout.write("Couldn't read from file %s\n" % source) | |
| 1120 return '' | |
| 1121 data = f.read() | |
| 1122 f.close() | |
| 1123 return data | |
| 1124 | |
| 1125 class HistoryItem(str): | |
| 305 | 1126 listformat = '-------------------------[%d]\n%s\n' |
| 230 | 1127 def __init__(self, instr): |
| 1128 str.__init__(self) | |
| 1129 self.lowercase = self.lower() | |
| 1130 self.idx = None | |
| 1131 def pr(self): | |
| 307 | 1132 return self.listformat % (self.idx, str(self)) |
| 230 | 1133 |
| 1134 class History(list): | |
| 305 | 1135 '''A list of HistoryItems that knows how to respond to user requests. |
| 1136 >>> h = History([HistoryItem('first'), HistoryItem('second'), HistoryItem('third'), HistoryItem('fourth')]) | |
| 1137 >>> h.span('-2..') | |
| 1138 ['third', 'fourth'] | |
| 1139 >>> h.span('2..3') | |
| 1140 ['second', 'third'] | |
| 1141 >>> h.span('3') | |
| 1142 ['third'] | |
| 1143 >>> h.span(':') | |
| 1144 ['first', 'second', 'third', 'fourth'] | |
| 1145 >>> h.span('2..') | |
| 1146 ['second', 'third', 'fourth'] | |
| 1147 >>> h.span('-1') | |
| 1148 ['fourth'] | |
| 1149 >>> h.span('-2..-3') | |
| 306 | 1150 ['third', 'second'] |
| 308 | 1151 >>> h.search('o') |
| 1152 ['second', 'fourth'] | |
| 1153 >>> h.search('/IR/') | |
| 1154 ['first', 'third'] | |
| 305 | 1155 ''' |
| 1156 def zero_based_index(self, onebased): | |
| 1157 result = onebased | |
| 1158 if result > 0: | |
| 1159 result -= 1 | |
| 1160 return result | |
| 1161 def to_index(self, raw): | |
| 1162 if raw: | |
| 1163 result = self.zero_based_index(int(raw)) | |
| 1164 else: | |
| 1165 result = None | |
| 1166 return result | |
| 308 | 1167 def search(self, target): |
| 1168 target = target.strip() | |
| 1169 if target[0] == target[-1] == '/' and len(target) > 1: | |
| 1170 target = target[1:-1] | |
| 1171 else: | |
| 1172 target = re.escape(target) | |
| 1173 pattern = re.compile(target, re.IGNORECASE) | |
| 1174 return [s for s in self if pattern.search(s)] | |
| 305 | 1175 spanpattern = re.compile(r'^\s*(?P<start>\-?\d+)?\s*(?P<separator>:|(\.{2,}))?\s*(?P<end>\-?\d+)?\s*$') |
| 1176 def span(self, raw): | |
| 308 | 1177 if raw.lower() in ('*', '-', 'all'): |
| 1178 raw = ':' | |
| 305 | 1179 results = self.spanpattern.search(raw) |
| 307 | 1180 if not results: |
| 1181 raise IndexError | |
| 305 | 1182 if not results.group('separator'): |
| 1183 return [self[self.to_index(results.group('start'))]] | |
| 1184 start = self.to_index(results.group('start')) | |
| 1185 end = self.to_index(results.group('end')) | |
| 1186 reverse = False | |
| 1187 if end is not None: | |
| 1188 if end < start: | |
| 1189 (start, end) = (end, start) | |
| 1190 reverse = True | |
| 1191 end += 1 | |
| 1192 result = self[start:end] | |
| 1193 if reverse: | |
| 1194 result.reverse() | |
| 1195 return result | |
| 1196 | |
| 1197 rangePattern = re.compile(r'^\s*(?P<start>[\d]+)?\s*\-\s*(?P<end>[\d]+)?\s*$') | |
| 230 | 1198 def append(self, new): |
| 1199 new = HistoryItem(new) | |
| 1200 list.append(self, new) | |
| 1201 new.idx = len(self) | |
| 1202 def extend(self, new): | |
| 1203 for n in new: | |
| 1204 self.append(n) | |
| 305 | 1205 |
| 1206 | |
| 1207 def get(self, getme=None, fromEnd=False): | |
| 1208 if not getme: | |
| 1209 return self | |
| 230 | 1210 try: |
| 1211 getme = int(getme) | |
| 1212 if getme < 0: | |
| 1213 return self[:(-1 * getme)] | |
| 1214 else: | |
| 1215 return [self[getme-1]] | |
| 1216 except IndexError: | |
| 1217 return [] | |
| 305 | 1218 except ValueError: |
| 1219 rangeResult = self.rangePattern.search(getme) | |
| 1220 if rangeResult: | |
| 1221 start = rangeResult.group('start') or None | |
| 1222 end = rangeResult.group('start') or None | |
| 1223 if start: | |
| 1224 start = int(start) - 1 | |
| 1225 if end: | |
| 1226 end = int(end) | |
| 1227 return self[start:end] | |
| 1228 | |
| 230 | 1229 getme = getme.strip() |
| 305 | 1230 |
| 230 | 1231 if getme.startswith(r'/') and getme.endswith(r'/'): |
| 1232 finder = re.compile(getme[1:-1], re.DOTALL | re.MULTILINE | re.IGNORECASE) | |
| 1233 def isin(hi): | |
| 1234 return finder.search(hi) | |
| 1235 else: | |
| 1236 def isin(hi): | |
| 1237 return (getme.lower() in hi.lowercase) | |
| 1238 return [itm for itm in self if isin(itm)] | |
| 1239 | |
| 1240 class NotSettableError(Exception): | |
| 1241 pass | |
| 1242 | |
| 1243 def cast(current, new): | |
| 1244 """Tries to force a new value into the same type as the current.""" | |
| 1245 typ = type(current) | |
| 1246 if typ == bool: | |
| 1247 try: | |
| 1248 return bool(int(new)) | |
| 1249 except ValueError, TypeError: | |
| 1250 pass | |
| 1251 try: | |
| 1252 new = new.lower() | |
| 1253 except: | |
| 1254 pass | |
| 1255 if (new=='on') or (new[0] in ('y','t')): | |
| 1256 return True | |
| 1257 if (new=='off') or (new[0] in ('n','f')): | |
| 1258 return False | |
| 1259 else: | |
| 1260 try: | |
| 1261 return typ(new) | |
| 1262 except: | |
| 1263 pass | |
| 1264 print "Problem setting parameter (now %s) to %s; incorrect type?" % (current, new) | |
| 1265 return current | |
| 1266 | |
| 1267 class Statekeeper(object): | |
| 1268 def __init__(self, obj, attribs): | |
| 1269 self.obj = obj | |
| 1270 self.attribs = attribs | |
| 282 | 1271 if self.obj: |
| 1272 self.save() | |
| 230 | 1273 def save(self): |
| 1274 for attrib in self.attribs: | |
| 1275 setattr(self, attrib, getattr(self.obj, attrib)) | |
| 1276 def restore(self): | |
| 282 | 1277 if self.obj: |
| 1278 for attrib in self.attribs: | |
| 1279 setattr(self.obj, attrib, getattr(self, attrib)) | |
| 230 | 1280 |
| 1281 class Borg(object): | |
| 1282 '''All instances of any Borg subclass will share state. | |
| 1283 from Python Cookbook, 2nd Ed., recipe 6.16''' | |
| 1284 _shared_state = {} | |
| 1285 def __new__(cls, *a, **k): | |
| 1286 obj = object.__new__(cls, *a, **k) | |
| 1287 obj.__dict__ = cls._shared_state | |
| 1288 return obj | |
| 1289 | |
| 1290 class OutputTrap(Borg): | |
| 1291 '''Instantiate an OutputTrap to divert/capture ALL stdout output. For use in unit testing. | |
| 1292 Call `tearDown()` to return to normal output.''' | |
| 1293 def __init__(self): | |
| 1294 self.old_stdout = sys.stdout | |
| 1295 self.trap = tempfile.TemporaryFile() | |
| 1296 sys.stdout = self.trap | |
| 1297 def read(self): | |
| 1298 self.trap.seek(0) | |
| 1299 result = self.trap.read() | |
| 1300 self.trap.truncate(0) | |
| 1301 return result.strip('\x00') | |
| 1302 def tearDown(self): | |
| 1303 sys.stdout = self.old_stdout | |
| 1304 | |
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1305 |
| 230 | 1306 class Cmd2TestCase(unittest.TestCase): |
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1307 '''Subclass this, setting CmdApp, to make a unittest.TestCase class |
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1308 that will execute the commands in a transcript file and expect the results shown. |
| 230 | 1309 See example.py''' |
| 1310 CmdApp = None | |
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1311 def fetchTranscripts(self): |
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1312 self.transcripts = {} |
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1313 for fileset in self.CmdApp.testfiles: |
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1314 for fname in glob.glob(fileset): |
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1315 tfile = open(fname) |
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1316 self.transcripts[fname] = iter(tfile.readlines()) |
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1317 tfile.close() |
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1318 if not len(self.transcripts): |
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1319 raise StandardError, "No test files found - nothing to test." |
| 230 | 1320 def setUp(self): |
| 1321 if self.CmdApp: | |
| 1322 self.outputTrap = OutputTrap() | |
| 1323 self.cmdapp = self.CmdApp() | |
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1324 self.fetchTranscripts() |
| 230 | 1325 def testall(self): |
| 1326 if self.CmdApp: | |
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1327 its = sorted(self.transcripts.items()) |
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1328 for (fname, transcript) in its: |
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1329 self._test_transcript(fname, transcript) |
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1330 regexPattern = pyparsing.QuotedString(quoteChar=r'/', escChar='\\', multiline=True, unquoteResults=True) |
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1331 regexPattern.ignore(pyparsing.cStyleComment) |
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1332 notRegexPattern = pyparsing.Word(pyparsing.printables) |
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1333 notRegexPattern.setParseAction(lambda t: re.escape(t[0])) |
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1334 expectationParser = regexPattern | notRegexPattern |
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1335 endStrippingRegex = re.compile(r'[ \t]*\n') |
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1336 def _test_transcript(self, fname, transcript): |
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1337 lineNum = 0 |
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1338 try: |
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1339 line = transcript.next() |
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1340 while True: |
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1341 while not line.startswith(self.cmdapp.prompt): |
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1342 line = transcript.next() |
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1343 command = [line[len(self.cmdapp.prompt):]] |
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1344 line = transcript.next() |
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1345 while line.startswith(self.cmdapp.continuation_prompt): |
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1346 command.append(line[len(self.cmdapp.continuation_prompt):]) |
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1347 line = transcript.next() |
| 305 | 1348 command = ''.join(command).strip() |
| 1349 self.cmdapp.onecmd(command) | |
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1350 result = self.outputTrap.read().strip() |
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1351 if line.startswith(self.cmdapp.prompt): |
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1352 message = '\nFile %s, line %d\nCommand was:\n%s\nExpected: (nothing)\nGot:\n%s\n'%\ |
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1353 (fname, lineNum, command, result) |
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1354 self.assert_(not(result.strip()), message) |
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1355 continue |
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1356 expected = [] |
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1357 while not line.startswith(self.cmdapp.prompt): |
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1358 expected.append(line) |
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1359 line = transcript.next() |
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1360 expected = ''.join(expected).strip() |
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1361 message = '\nFile %s, line %d\nCommand was:\n%s\nExpected:\n%s\nGot:\n%s\n'%\ |
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1362 (fname, lineNum, command, expected, result) |
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1363 expected = self.expectationParser.transformString(expected) |
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1364 expected = self.endStrippingRegex.sub('\s*\n', expected) |
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1365 self.assert_(re.match(expected, result, re.MULTILINE | re.DOTALL), message) |
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1366 except StopIteration: |
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1367 pass |
| 230 | 1368 def tearDown(self): |
| 1369 if self.CmdApp: | |
| 1370 self.outputTrap.tearDown() | |
| 1371 | |
| 1372 if __name__ == '__main__': | |
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1373 doctest.testmod(optionflags = doctest.NORMALIZE_WHITESPACE) |
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1374 |
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1375 ''' |
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1376 To make your application transcript-testable, add text like this to your .py file |
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1377 (replacing CmdLineApp with your own application class's name). Then, a cut-and-pasted |
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1378 version of a successful session with your application, saved as a text file, can serve |
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1379 as a test for future |
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1380 |
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1381 Invoke the test later with `python myapplication.py --test mytranscripttestfile.ext` |
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1382 Wildcards can be used to test against multiple transcript files. |
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1383 |
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1384 |
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1385 class TestMyAppCase(Cmd2TestCase): |
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1386 CmdApp = CmdLineApp |
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1387 parser = optparse.OptionParser() |
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1388 parser.add_option('-t', '--test', dest='test', action="store_true", |
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1389 help='Test against transcript(s) in FILE (wildcards OK)') |
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1390 (callopts, callargs) = parser.parse_args() |
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1391 if callopts.test: |
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1392 CmdLineApp.testfiles = callargs |
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1393 sys.argv = [sys.argv[0]] # the --test argument upsets unittest.main() |
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1394 unittest.main() |
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1395 else: |
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1396 CmdLineApp().cmdloop() |
| 286 | 1397 ''' |