bzr completer caches the commands (only runs bzr help commands on the first run)

IPython/Extensions/ipy_completers.py

@@ -1,354 +1,359 b''
 #!/usr/bin/env python
 
 """ Implementations for various useful completers
 
 See Extensions/ipy_stock_completers.py on examples of how to enable a completer,
 but the basic idea is to do:
 
 ip.set_hook('complete_command', svn_completer, str_key = 'svn')
 
 """
 import IPython.ipapi
 import glob,os,shlex,sys
 import inspect
 from time import time
 ip = IPython.ipapi.get()
 
 try:
     set
 except:
     from sets import Set as set
 
 TIMEOUT_STORAGE = 3 #Time in seconds after which the rootmodules will be stored
 TIMEOUT_GIVEUP = 20 #Time in seconds after which we give up
 
 def quick_completer(cmd, completions):
     """ Easily create a trivial completer for a command.
 
     Takes either a list of completions, or all completions in string
     (that will be split on whitespace)
     
     Example::
     
         [d:\ipython]|1> import ipy_completers                                       
         [d:\ipython]|2> ipy_completers.quick_completer('foo', ['bar','baz'])        
         [d:\ipython]|3> foo b<TAB>
         bar baz                                                                     
         [d:\ipython]|3> foo ba
     """
     if isinstance(completions, basestring):
         
         completions = completions.split()
     def do_complete(self,event):
         return completions
     
     ip.set_hook('complete_command',do_complete, str_key = cmd)
     
 def getRootModules():
     """
     Returns a list containing the names of all the modules available in the
     folders of the pythonpath.
     """
     modules = []
     if ip.db.has_key('rootmodules'):
         return ip.db['rootmodules']
     t = time()
     store = False
     for path in sys.path:
         modules += moduleList(path)        
         if time() - t >= TIMEOUT_STORAGE and not store:
             store = True
             print "\nCaching the list of root modules, please wait!" 
             print "(This will only be done once - type '%rehashx' to " + \
             "reset cache!)"
             print
         if time() - t > TIMEOUT_GIVEUP:
             print "This is taking too long, we give up."
             print
             ip.db['rootmodules'] = []
             return []
     
     modules += sys.builtin_module_names
       
     modules = list(set(modules))
     if '__init__' in modules:
         modules.remove('__init__')
     modules = list(set(modules))
     if store:
         ip.db['rootmodules'] = modules
     return modules
 
 def moduleList(path):
     """
     Return the list containing the names of the modules available in the given
     folder.
     """
 
     if os.path.isdir(path):
         folder_list = os.listdir(path)
     else:
         folder_list = []
     #folder_list = glob.glob(os.path.join(path,'*'))
     folder_list = [p for p in folder_list  \
        if os.path.exists(os.path.join(path, p,'__init__.py'))\
            or p[-3:] in ('.py','.so')\
            or p[-4:] in ('.pyc','.pyo')]
 
     folder_list = [os.path.basename(p).split('.')[0] for p in folder_list]
     return folder_list
 
 def moduleCompletion(line):
     """
     Returns a list containing the completion possibilities for an import line.
     The line looks like this :
     'import xml.d'
     'from xml.dom import'
     """
     def tryImport(mod, only_modules=False):
         def isImportable(module, attr):
             if only_modules:
                 return inspect.ismodule(getattr(module, attr))
             else:
                 return not(attr[:2] == '__' and attr[-2:] == '__')
         try:
             m = __import__(mod)
         except:
             return []
         mods = mod.split('.')
         for module in mods[1:]:
             m = getattr(m,module)
         if (not hasattr(m, '__file__')) or (not only_modules) or\
            (hasattr(m, '__file__') and '__init__' in m.__file__):
             completion_list = [attr for attr in dir(m) if isImportable(m, attr)]
         completion_list.extend(getattr(m,'__all__',[]))
         if hasattr(m, '__file__') and '__init__' in m.__file__:
             completion_list.extend(moduleList(os.path.dirname(m.__file__)))
         completion_list = list(set(completion_list))
         if '__init__' in completion_list:
             completion_list.remove('__init__')
         return completion_list
 
     words = line.split(' ')
     if len(words) == 3 and words[0] == 'from':
         return ['import ']
     if len(words) < 3 and (words[0] in ['import','from']) :
         if len(words) == 1:
             return getRootModules()
         mod = words[1].split('.')
         if len(mod) < 2:
             return getRootModules()
         completion_list = tryImport('.'.join(mod[:-1]), True)
         completion_list = ['.'.join(mod[:-1] + [el]) for el in completion_list]
         return completion_list
     if len(words) >= 3 and words[0] == 'from':
         mod = words[1]
         return tryImport(mod)
 
 def vcs_completer(commands, event):
     """ utility to make writing typical version control app completers easier
 
     VCS command line apps typically have the format:
 
     [sudo ]PROGNAME [help] [command] file file...
 
     """
 
 
     cmd_param = event.line.split()
     if event.line.endswith(' '):
         cmd_param.append('')
 
     if cmd_param[0] == 'sudo':
         cmd_param = cmd_param[1:]
 
     if len(cmd_param) == 2 or 'help' in cmd_param:
         return commands.split()
 
     return ip.IP.Completer.file_matches(event.symbol)
 
 
 pkg_cache = None
 
 def module_completer(self,event):
     """ Give completions after user has typed 'import ...' or 'from ...'"""
 
     # This works in all versions of python.  While 2.5 has
     # pkgutil.walk_packages(), that particular routine is fairly dangerous,
     # since it imports *EVERYTHING* on sys.path.  That is: a) very slow b) full
     # of possibly problematic side effects.
     # This search the folders in the sys.path for available modules.
 
     return moduleCompletion(event.line)
 
 
 svn_commands = """\
 add blame praise annotate ann cat checkout co cleanup commit ci copy
 cp delete del remove rm diff di export help ? h import info list ls
 lock log merge mkdir move mv rename ren propdel pdel pd propedit pedit
 pe propget pget pg proplist plist pl propset pset ps resolved revert
 status stat st switch sw unlock update
 """
 
 def svn_completer(self,event):
     return vcs_completer(svn_commands, event)
 
 
 hg_commands = """
 add addremove annotate archive backout branch branches bundle cat
 clone commit copy diff export grep heads help identify import incoming
 init locate log manifest merge outgoing parents paths pull push
 qapplied qclone qcommit qdelete qdiff qfold qguard qheader qimport
 qinit qnew qnext qpop qprev qpush qrefresh qrename qrestore qsave
 qselect qseries qtop qunapplied recover remove rename revert rollback
 root serve showconfig status strip tag tags tip unbundle update verify
 version
 """
 
 def hg_completer(self,event):
     """ Completer for mercurial commands """
 
     return vcs_completer(hg_commands, event)
 
 
 
+__bzr_commands = None
+
 def bzr_commands():
+    global __bzr_commands
+    if __bzr_commands is not None:
+        return __bzr_commands
     out = os.popen('bzr help commands')
-    return [l.split()[0] for l in out] 
-                 
+    __bzr_commands = [l.split()[0] for l in out]
+    return __bzr_commands                
 
 def bzr_completer(self,event):
     """ Completer for bazaar commands """
     cmd_param = event.line.split()
     if event.line.endswith(' '):
         cmd_param.append('')
 
     if len(cmd_param) > 2:
         cmd = cmd_param[1]
         param = cmd_param[-1]
         output_file = (param == '--output=')
         if cmd == 'help':
             return bzr_commands()
         elif cmd in ['bundle-revisions','conflicts',
                      'deleted','nick','register-branch',
                      'serve','unbind','upgrade','version',
                      'whoami'] and not output_file:
             return []
         else:
             # the rest are probably file names
             return ip.IP.Completer.file_matches(event.symbol)
 
     return bzr_commands()
 
 
 def shlex_split(x):
     """Helper function to split lines into segments."""
     #shlex.split raise exception if syntax error in sh syntax
     #for example if no closing " is found. This function keeps dropping
     #the last character of the line until shlex.split does not raise
     #exception. Adds end of the line to the result of shlex.split
     #example: %run "c:/python  -> ['%run','"c:/python']
     endofline=[]
     while x!="":
         try:
             comps=shlex.split(x)
             if len(endofline)>=1:
                 comps.append("".join(endofline))
             return comps
         except ValueError:
             endofline=[x[-1:]]+endofline
             x=x[:-1]
     return ["".join(endofline)]
 
 def runlistpy(self, event):
     comps = shlex_split(event.line)
     relpath = (len(comps) > 1 and comps[-1] or '').strip("'\"")
 
     #print "\nev=",event  # dbg
     #print "rp=",relpath  # dbg
     #print 'comps=',comps  # dbg
 
     lglob = glob.glob
     isdir = os.path.isdir
     if relpath.startswith('~'):
         relpath = os.path.expanduser(relpath)
     dirs = [f.replace('\\','/') + "/" for f in lglob(relpath+'*')
             if isdir(f)]
 
     # Find if the user has already typed the first filename, after which we
     # should complete on all files, since after the first one other files may
     # be arguments to the input script.
     #filter(
     if filter(lambda f: f.endswith('.py') or f.endswith('.ipy') or
               f.endswith('.pyw'),comps):
         pys =  [f.replace('\\','/') for f in lglob('*')]
     else:
         pys =  [f.replace('\\','/')
                 for f in lglob(relpath+'*.py') + lglob(relpath+'*.ipy') +
                 lglob(relpath + '*.pyw')]
     return dirs + pys
 
 
 def cd_completer(self, event):
     relpath = event.symbol
     #print event # dbg
     if '-b' in event.line:
         # return only bookmark completions
         bkms = self.db.get('bookmarks',{})
         return bkms.keys()
 
     
     if event.symbol == '-':
         width_dh = str(len(str(len(ip.user_ns['_dh']) + 1)))
         # jump in directory history by number
         fmt = '-%0' + width_dh +'d [%s]'
         ents = [ fmt % (i,s) for i,s in enumerate(ip.user_ns['_dh'])]
         if len(ents) > 1:
             return ents
         return []
 
     if relpath.startswith('~'):
         relpath = os.path.expanduser(relpath).replace('\\','/')
     found = []
     for d in [f.replace('\\','/') + '/' for f in glob.glob(relpath+'*')
               if os.path.isdir(f)]:
         if ' ' in d:
             # we don't want to deal with any of that, complex code
             # for this is elsewhere
             raise IPython.ipapi.TryNext
         found.append( d )
 
     if not found:
         if os.path.isdir(relpath):
             return [relpath]
         raise IPython.ipapi.TryNext
     return found
 
 def apt_get_packages(prefix):
     out = os.popen('apt-cache pkgnames')
     for p in out:
         if p.startswith(prefix):
             yield p.rstrip()
     
     
 apt_commands = """\
 update upgrade install remove purge source build-dep dist-upgrade
 dselect-upgrade clean autoclean check"""
 
 def apt_completer(self, event):
     """ Completer for apt-get (uses apt-cache internally)
 
     """
 
 
     cmd_param = event.line.split()
     if event.line.endswith(' '):
         cmd_param.append('')
 
     if cmd_param[0] == 'sudo':
         cmd_param = cmd_param[1:]
 
     if len(cmd_param) == 2 or 'help' in cmd_param:
         return apt_commands.split()
 
     return list(apt_get_packages(event.symbol))