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# -*- coding: utf-8 -*-
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""" IPython extension: add %rehashdir magic
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Usage:
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%rehash_dir c:/bin c:/tools
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- Add all executables under c:/bin and c:/tools to alias table, in
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order to make them directly executable from any directory.
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This also serves as an example on how to extend ipython
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with new magic functions.
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Unlike rest of ipython, this requires Python 2.4 (optional
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extensions are allowed to do that).
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To install, add
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"import_mod rehash_dir"
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To your ipythonrc or just execute "import rehash_dir" in ipython
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prompt.
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$Id: InterpreterExec.py 994 2006-01-08 08:29:44Z fperez $
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"""
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import IPython.ipapi as ip
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import os,re
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@ip.asmagic("rehashdir")
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def rehashdir_f(self,arg):
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""" Add executables in all specified dirs to alias table
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Usage:
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%rehash_dir c:/bin c:/tools
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- Add all executables under c:/bin and c:/tools to alias table, in
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order to make them directly executable from any directory.
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"""
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# most of the code copied from Magic.magic_rehashx
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if not arg:
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arg = '.'
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path = arg.split()
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alias_table = self.shell.alias_table
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if os.name == 'posix':
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isexec = lambda fname:os.path.isfile(fname) and \
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os.access(fname,os.X_OK)
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else:
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try:
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winext = os.environ['pathext'].replace(';','|').replace('.','')
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except KeyError:
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winext = 'exe|com|bat'
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execre = re.compile(r'(.*)\.(%s)$' % winext,re.IGNORECASE)
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isexec = lambda fname:os.path.isfile(fname) and execre.match(fname)
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savedir = os.getcwd()
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try:
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# write the whole loop for posix/Windows so we don't have an if in
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# the innermost part
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if os.name == 'posix':
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for pdir in path:
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os.chdir(pdir)
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for ff in os.listdir(pdir):
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if isexec(ff):
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# each entry in the alias table must be (N,name),
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# where N is the number of positional arguments of the
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# alias.
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print "Aliasing",ff
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alias_table[ff] = (0,os.path.abspath(ff))
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else:
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for pdir in path:
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os.chdir(pdir)
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for ff in os.listdir(pdir):
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if isexec(ff):
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print "Aliasing",ff
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alias_table[execre.sub(r'\1',ff)] = (0,os.path.abspath(ff))
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# Make sure the alias table doesn't contain keywords or builtins
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self.shell.alias_table_validate()
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# Call again init_auto_alias() so we get 'rm -i' and other
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# modified aliases since %rehashx will probably clobber them
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self.shell.init_auto_alias()
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finally:
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os.chdir(savedir)
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