upstream/ipython Files · IPython/quarantine/ipy_which.py

Fix paste/cpaste bug and refactor/cleanup that code a lot....

Fix paste/cpaste bug and refactor/cleanup that code a lot. In fixing a pasting bug (mishandling of whitespace when input had prompts) it became clear the pasting code hadn't been updated when the new prefiltering machinery was added. Furthermore, the pasting magics are only for the terminal, but the code was in the base classes. This refactors and simplifies the pasting code, moving it to the terminal shell only, and removing unnecessary methods from the main class (using small utility functions instead). The tests were simplified because the previous regexp supported some odd edge cases that are not valid in the normal prefiltering code. We want to have a single location and set of rules for input prefiltering, so I changed some of the test cases to be consistent with what prefilter allows.

Brian Granger - - Load All Authors

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      r""" %which magic command

      %which <cmd> => search PATH for files matching PATH. Also scans aliases

      """

      from IPython.core import ipapi

      ip = ipapi.get()

      import os,sys

      from fnmatch import fnmatch

      def which(fname):

          fullpath = filter(os.path.isdir,os.environ['PATH'].split(os.pathsep))

          if '.' not in fullpath:

              fullpath = ['.'] + fullpath

          fn = fname

          for p in fullpath:

              for f in os.listdir(p):

                  head, ext = os.path.splitext(f)

                  if f == fn or fnmatch(head, fn):

                      yield os.path.join(p,f)

          return

      def which_alias(fname):

          for al, tgt in ip.alias_table.items():

              if not (al == fname or fnmatch(al, fname)):

                  continue

              if callable(tgt):

                  print "Callable alias",tgt

                  d = tgt.__doc__

                  if d:

                      print "Docstring:\n",d

                      continue

              trg = tgt[1]

              trans = ip.expand_alias(trg)

              cmd = trans.split(None,1)[0]

              print al,"->",trans

              for realcmd in which(cmd):

                  print "  ==",realcmd

      def which_f(self, arg):

          r""" %which <cmd> => search PATH for files matching cmd. Also scans aliases.

          Traverses PATH and prints all files (not just executables!) that match the

          pattern on command line. Probably more useful in finding stuff

          interactively than 'which', which only prints the first matching item.

          Also discovers and expands aliases, so you'll see what will be executed

          when you call an alias.

          Example:

          [~]|62> %which d

          d -> ls -F --color=auto

            == c:\cygwin\bin\ls.exe

          c:\cygwin\bin\d.exe

          [~]|64> %which diff*

          diff3 -> diff3

            == c:\cygwin\bin\diff3.exe

          diff -> diff

            == c:\cygwin\bin\diff.exe

          c:\cygwin\bin\diff.exe

          c:\cygwin\bin\diff3.exe

          """

          which_alias(arg)

          for e in which(arg):

              print e

      ip.define_magic("which",which_f)

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				r""" %which magic command

				%which <cmd> => search PATH for files matching PATH. Also scans aliases

				"""

				from IPython.core import ipapi
				ip = ipapi.get()

				import os,sys
				from fnmatch import fnmatch
				def which(fname):
				fullpath = filter(os.path.isdir,os.environ['PATH'].split(os.pathsep))

				if '.' not in fullpath:
				fullpath = ['.'] + fullpath
				fn = fname
				for p in fullpath:
				for f in os.listdir(p):
				head, ext = os.path.splitext(f)
				if f == fn or fnmatch(head, fn):
				yield os.path.join(p,f)
				return

				def which_alias(fname):
				for al, tgt in ip.alias_table.items():
				if not (al == fname or fnmatch(al, fname)):
				continue
				if callable(tgt):
				print "Callable alias",tgt
				d = tgt.__doc__
				if d:
				print "Docstring:\n",d
				continue
				trg = tgt[1]

				trans = ip.expand_alias(trg)
				cmd = trans.split(None,1)[0]
				print al,"->",trans
				for realcmd in which(cmd):
				print " ==",realcmd

				def which_f(self, arg):
				r""" %which <cmd> => search PATH for files matching cmd. Also scans aliases.

				Traverses PATH and prints all files (not just executables!) that match the
				pattern on command line. Probably more useful in finding stuff
				interactively than 'which', which only prints the first matching item.

				Also discovers and expands aliases, so you'll see what will be executed
				when you call an alias.

				Example:

				[~]\|62> %which d
				d -> ls -F --color=auto
				== c:\cygwin\bin\ls.exe
				c:\cygwin\bin\d.exe

				[~]\|64> %which diff*
				diff3 -> diff3
				== c:\cygwin\bin\diff3.exe
				diff -> diff
				== c:\cygwin\bin\diff.exe
				c:\cygwin\bin\diff.exe
				c:\cygwin\bin\diff3.exe

				"""

				which_alias(arg)

				for e in which(arg):
				print e

				ip.define_magic("which",which_f)