rehashing now done by the config file alone - providing the system

commands even without pysh typically makes sense.

IPython/Extensions/InterpreterExec.py

@@ -1,272 +1,273 b''
 # -*- coding: utf-8 -*-
 """Modified input prompt for executing files.
 
 We define a special input line filter to allow typing lines which begin with
 '~', '/' or '.'. If one of those strings is encountered, it is automatically
 executed.
 
-$Id: InterpreterExec.py 994 2006-01-08 08:29:44Z fperez $"""
+$Id: InterpreterExec.py 1039 2006-01-20 23:59:33Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2004 W.J. van der Laan <[e-mail]>
 #       Copyright (C) 2004-2006 Fernando Perez <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #*****************************************************************************
 
 from IPython import Release
 __author__ = 'W.J. van der Laan <[e-mail]>, '\
              '%s <%s>' %  Release.authors['Fernando']
 __license__ = Release.license
 
 def prefilter_shell(self,line,continuation):
     """Alternate prefilter, modified for shell-like functionality.
 
     - Execute all lines beginning with '~', '/' or '.'
     - $var=cmd <=> %sc var=cmd
     - $$var=cmd <=> %sc -l var=cmd
     """
 
     if line:
         l0 = line[0]
         if l0 in '~/.':
             return self._prefilter("!%s"%line,continuation)
         elif l0=='$':
             lrest = line[1:]
             if lrest.startswith('$'):
                 # $$var=cmd <=> %sc -l var=cmd
                 return self._prefilter("%ssc -l %s" % (self.ESC_MAGIC,lrest[1:]),
                                        continuation)
             else:
                 # $var=cmd <=> %sc var=cmd
                 return self._prefilter("%ssc %s" % (self.ESC_MAGIC,lrest),
                                        continuation)
         else:
             return self._prefilter(line,continuation)
     else:
         return self._prefilter(line,continuation)
 
 # Rebind this to be the new IPython prefilter:
 from IPython.iplib import InteractiveShell
 InteractiveShell.prefilter = prefilter_shell
 # Clean up the namespace.
 del InteractiveShell,prefilter_shell
 
 # Provide pysh and further shell-oriented services
 import os,sys,shutil
 from IPython.genutils import system,shell,getoutput,getoutputerror
 
 # Short aliases for getting shell output as a string and a list
 sout = getoutput
 lout = lambda cmd: getoutput(cmd,split=1)
 
 # Empty function, meant as a docstring holder so help(pysh) works.
 def pysh():
     """Pysh is a set of modules and extensions to IPython which make shell-like
     usage with Python syntax more convenient.  Keep in mind that pysh is NOT a
     full-blown shell, so don't try to make it your /etc/passwd entry!
     
     In particular, it has no job control, so if you type Ctrl-Z (under Unix),
     you'll suspend pysh itself, not the process you just started.
 
     Since pysh is really nothing but a customized IPython, you should
     familiarize yourself with IPython's features.  This brief help mainly
     documents areas in which pysh differs from the normal IPython.
 
     ALIASES
     -------
     All of your $PATH has been loaded as IPython aliases, so you should be
     able to type any normal system command and have it executed.  See %alias? 
     and %unalias? for details on the alias facilities.
 
     SPECIAL SYNTAX
     --------------
     Any lines which begin with '~', '/' and '.' will be executed as shell
     commands instead of as Python code. The special escapes below are also
     recognized.  !cmd is valid in single or multi-line input, all others are
     only valid in single-line input:
 
     !cmd      - pass 'cmd' directly to the shell
     !!cmd     - execute 'cmd' and return output as a list (split on '\\n')
     $var=cmd  - capture output of cmd into var, as a string
     $$var=cmd - capture output of cmd into var, as a list (split on '\\n')
 
     The $/$$ syntaxes make Python variables from system output, which you can
     later use for further scripting.  The converse is also possible: when
     executing an alias or calling to the system via !/!!, you can expand any
     python variable or expression by prepending it with $.  Full details of
     the allowed syntax can be found in Python's PEP 215.
 
     A few brief examples will illustrate these:
 
         fperez[~/test]|3> !ls *s.py
         scopes.py  strings.py
 
     ls is an internal alias, so there's no need to use !:
         fperez[~/test]|4> ls *s.py
         scopes.py*  strings.py
 
     !!ls will return the output into a Python variable:
         fperez[~/test]|5> !!ls *s.py
                       <5> ['scopes.py', 'strings.py']
         fperez[~/test]|6> print _5
         ['scopes.py', 'strings.py']
 
     $ and $$ allow direct capture to named variables:
         fperez[~/test]|7> $astr = ls *s.py
         fperez[~/test]|8> astr
                       <8> 'scopes.py\\nstrings.py'
 
         fperez[~/test]|9> $$alist = ls *s.py
         fperez[~/test]|10> alist
                       <10> ['scopes.py', 'strings.py']
 
     alist is now a normal python list you can loop over.  Using $ will expand
     back the python values when alias calls are made:
         fperez[~/test]|11> for f in alist:
                       |..>     print 'file',f,
                       |..>     wc -l $f
                       |..>
         file scopes.py     13 scopes.py
         file strings.py      4 strings.py
 
     Note that you may need to protect your variables with braces if you want
     to append strings to their names.  To copy all files in alist to .bak
     extensions, you must use:
         fperez[~/test]|12> for f in alist:
                       |..>     cp $f ${f}.bak
 
     If you try using $f.bak, you'll get an AttributeError exception saying
     that your string object doesn't have a .bak attribute.  This is because
     the $ expansion mechanism allows you to expand full Python expressions:
         fperez[~/test]|13> echo "sys.platform is: $sys.platform"
         sys.platform is: linux2
 
     IPython's input history handling is still active, which allows you to
     rerun a single block of multi-line input by simply using exec:    
         fperez[~/test]|14> $$alist = ls *.eps
         fperez[~/test]|15> exec _i11
         file image2.eps    921 image2.eps
         file image.eps    921 image.eps
 
     While these are new special-case syntaxes, they are designed to allow very
     efficient use of the shell with minimal typing.  At an interactive shell
     prompt, conciseness of expression wins over readability.
 
     USEFUL FUNCTIONS AND MODULES
     ----------------------------
     The os, sys and shutil modules from the Python standard library are
     automatically loaded.  Some additional functions, useful for shell usage,
     are listed below.  You can request more help about them with '?'.
 
     shell   - execute a command in the underlying system shell    
     system  - like shell(), but return the exit status of the command
     sout    - capture the output of a command as a string
     lout    - capture the output of a command as a list (split on '\\n')
     getoutputerror - capture (output,error) of a shell command
 
     sout/lout are the functional equivalents of $/$$.  They are provided to
     allow you to capture system output in the middle of true python code,
     function definitions, etc (where $ and $$ are invalid).
 
     DIRECTORY MANAGEMENT
     --------------------
     Since each command passed by pysh to the underlying system is executed in
     a subshell which exits immediately, you can NOT use !cd to navigate the
     filesystem.
 
     Pysh provides its own builtin '%cd' magic command to move in the
     filesystem (the % is not required with automagic on).  It also maintains a
     list of visited directories (use %dhist to see it) and allows direct
     switching to any of them.  Type 'cd?' for more details.
 
     %pushd, %popd and %dirs are provided for directory stack handling.
 
     PROMPT CUSTOMIZATION
     --------------------
     
     The supplied ipythonrc-pysh profile comes with an example of a very
     colored and detailed prompt, mainly to serve as an illustration.  The
     valid escape sequences, besides color names, are:
 
         \\#  - Prompt number.
         \\D  - Dots, as many as there are digits in \\# (so they align).
         \\w  - Current working directory (cwd).
         \\W  - Basename of current working directory.
         \\XN - Where N=0..5. N terms of the cwd, with $HOME written as ~.
         \\YN - Where N=0..5. Like XN, but if ~ is term N+1 it's also shown.
         \\u  - Username.
         \\H  - Full hostname.
         \\h  - Hostname up to first '.'
         \\$  - Root symbol ($ or #).
         \\t  - Current time, in H:M:S format.
         \\v  - IPython release version.
         \\n  - Newline.
         \\r  - Carriage return.
         \\\\ - An explicitly escaped '\\'.
 
     You can configure your prompt colors using any ANSI color escape.  Each
     color escape sets the color for any subsequent text, until another escape
     comes in and changes things.  The valid color escapes are:
 
         \\C_Black
         \\C_Blue
         \\C_Brown
         \\C_Cyan
         \\C_DarkGray
         \\C_Green
         \\C_LightBlue
         \\C_LightCyan
         \\C_LightGray
         \\C_LightGreen
         \\C_LightPurple
         \\C_LightRed
         \\C_Purple
         \\C_Red
         \\C_White
         \\C_Yellow
         \\C_Normal - Stop coloring, defaults to your terminal settings.
     """
     pass
 
 # Configure a few things.  Much of this is fairly hackish, since IPython
 # doesn't really expose a clean API for it.  Be careful if you start making
 # many modifications here.
 
 print """\
 Welcome to pysh, a set of extensions to IPython for shell usage.
 help(pysh) -> help on the installed shell extensions and syntax.
 """
 
 #  Set the 'cd' command to quiet mode, a more shell-like behavior
 __IPYTHON__.default_option('cd','-q')
 
+# This is redundant, ipy_user_conf.py will determine this
 # Load all of $PATH as aliases
-if os.name == 'posix':
-    # %rehash is very fast, but it doesn't check for executability, it simply
-    # dumps everything in $PATH as an alias. Use rehashx if you want more
-    # checks.
-    __IPYTHON__.magic_rehash()
-else:
-    # Windows users: the list of extensions considered executable is read from
-    # the environment variable 'pathext'.  If this is undefined, IPython
-    # defaults to EXE, COM and BAT.
-    # %rehashx is the one which does extension analysis, at the cost of
-    # being much slower than %rehash.
-    __IPYTHON__.magic_rehashx()
+#if os.name == 'posix':
+#    # %rehash is very fast, but it doesn't check for executability, it simply
+#    # dumps everything in $PATH as an alias. Use rehashx if you want more
+#    # checks.
+#    __IPYTHON__.magic_rehash()
+#else:
+#    # Windows users: the list of extensions considered executable is read from
+#    # the environment variable 'pathext'.  If this is undefined, IPython
+#    # defaults to EXE, COM and BAT.
+#    # %rehashx is the one which does extension analysis, at the cost of
+#    # being much slower than %rehash.
+#    __IPYTHON__.magic_rehashx()
 
 # Remove %sc,%sx if present as aliases
 __IPYTHON__.magic_unalias('sc')
 __IPYTHON__.magic_unalias('sx')
 
 # We need different criteria for line-splitting, so that aliases such as
 # 'gnome-terminal' are interpreted as a single alias instead of variable
 # 'gnome' minus variable 'terminal'.
 import re
 __IPYTHON__.line_split = re.compile(r'^([\s*,;/])'
                                     r'([\?\w\.\-\+]+\w*\s*)'
                                     r'(\(?.*$)')
 
 # Namespace cleanup
 del re

IPython/UserConfig/ipy_user_conf.py

@@ -1,43 +1,49 b''
 """ User configuration file for IPython
 
 This is a more flexible and safe way to configure ipython than *rc files
 (ipythonrc, ipythonrc-pysh etc.)
 
 This file is always imported on ipython startup. You should import all the
 ipython extensions you need here (see IPython/Extensions directory).
 
 Feel free to edit this file to customize your ipython experience. If 
 you wish to only use the old config system, it's perfectly ok to make this file 
 empty.
 
 """
 
 # Most of your config files and extensions will probably start with this import
 
 import IPython.ipapi as ip
 
+import os
 
 o = ip.options()
 # autocall 1 ('smart') is default anyway, this is just an 
 # example on how to set an option
 o.autocall = 1
 
 if o.profile == 'pysh':
     # Jason Orendorff's path class is handy to have in user namespace
     # if you are doing shell-like stuff
     ip.ex("from IPython.path import path" )
     
 # Uncomment these lines to get pysh-like prompt for all profiles. 
 
 #o.prompt_in1= '\C_LightBlue[\C_LightCyan\Y1\C_LightBlue]\C_Green|\#> '
 #o.prompt_in2= '\C_Green|\C_LightGreen\D\C_Green> '
 #o.prompt_out= '<\#> '
 
 # make 'd' an alias for ls -F
 
 ip.magic('alias d ls -F --color=auto')
 
-# Make available all system commands. You can comment this line out to speed up 
-# startup on slow machines, and to conserve a bit of memory
+# Make available all system commands through "rehashing" immediately. 
+# You can comment these lines out to speed up startup on very slow 
+# machines, and to conserve a bit of memory.
 
+if os.name=='posix':
+    ip.magic('rehash')
+else:
+    #slightly slower, but better results esp. with Windows
 ip.magic('rehashx')