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r""" %which magic command
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%which <cmd> => search PATH for files matching PATH. Also scans aliases
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"""
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from IPython.core import ipapi
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ip = ipapi.get()
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import os,sys
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from fnmatch import fnmatch
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def which(fname):
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fullpath = filter(os.path.isdir,os.environ['PATH'].split(os.pathsep))
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if '.' not in fullpath:
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fullpath = ['.'] + fullpath
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fn = fname
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for p in fullpath:
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for f in os.listdir(p):
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head, ext = os.path.splitext(f)
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if f == fn or fnmatch(head, fn):
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yield os.path.join(p,f)
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return
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def which_alias(fname):
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for al, tgt in ip.alias_table.items():
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if not (al == fname or fnmatch(al, fname)):
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continue
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if callable(tgt):
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print "Callable alias",tgt
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d = tgt.__doc__
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if d:
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print "Docstring:\n",d
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continue
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trg = tgt[1]
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trans = ip.expand_alias(trg)
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cmd = trans.split(None,1)[0]
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print al,"->",trans
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for realcmd in which(cmd):
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print " ==",realcmd
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def which_f(self, arg):
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r""" %which <cmd> => search PATH for files matching cmd. Also scans aliases.
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Traverses PATH and prints all files (not just executables!) that match the
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pattern on command line. Probably more useful in finding stuff
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interactively than 'which', which only prints the first matching item.
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Also discovers and expands aliases, so you'll see what will be executed
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when you call an alias.
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Example:
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[~]|62> %which d
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d -> ls -F --color=auto
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== c:\cygwin\bin\ls.exe
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c:\cygwin\bin\d.exe
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[~]|64> %which diff*
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diff3 -> diff3
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== c:\cygwin\bin\diff3.exe
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diff -> diff
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== c:\cygwin\bin\diff.exe
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c:\cygwin\bin\diff.exe
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c:\cygwin\bin\diff3.exe
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"""
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which_alias(arg)
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for e in which(arg):
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print e
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ip.define_magic("which",which_f)
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