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77 lines
1.8 KiB
Python
77 lines
1.8 KiB
Python
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#! /usr/local/python
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# linktree
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#
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# Make a copy of a directory tree with symbolic links to all files in the
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# original tree.
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# All symbolic links go to a special symbolic link at the top, so you
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# can easily fix things if the original source tree moves.
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# See also "mkreal".
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#
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# usage: mklinks oldtree newtree
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import sys, posix, path
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LINK = '.LINK' # Name of special symlink at the top.
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debug = 0
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def main():
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if not 3 <= len(sys.argv) <= 4:
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print 'usage:', sys.argv[0], 'oldtree newtree [linkto]'
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return 2
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oldtree, newtree = sys.argv[1], sys.argv[2]
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if len(sys.argv) > 3:
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link = sys.argv[3]
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link_may_fail = 1
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else:
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link = LINK
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link_may_fail = 0
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if not path.isdir(oldtree):
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print oldtree + ': not a directory'
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return 1
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try:
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posix.mkdir(newtree, 0777)
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except posix.error, msg:
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print newtree + ': cannot mkdir:', msg
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return 1
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linkname = path.cat(newtree, link)
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try:
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posix.symlink(path.cat('..', oldtree), linkname)
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except posix.error, msg:
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if not link_may_fail:
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print linkname + ': cannot symlink:', msg
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return 1
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else:
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print linkname + ': warning: cannot symlink:', msg
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linknames(oldtree, newtree, link)
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return 0
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def linknames(old, new, link):
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if debug: print 'linknames', (old, new, link)
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try:
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names = posix.listdir(old)
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except posix.error, msg:
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print old + ': warning: cannot listdir:', msg
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return
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for name in names:
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if name not in ('.', '..'):
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oldname = path.cat(old, name)
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linkname = path.cat(link, name)
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newname = path.cat(new, name)
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if debug > 1: print oldname, newname, linkname
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if path.isdir(oldname) and not path.islink(oldname):
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try:
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posix.mkdir(newname, 0777)
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ok = 1
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except:
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print newname + ': warning: cannot mkdir:', msg
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ok = 0
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if ok:
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linkname = path.cat('..', linkname)
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linknames(oldname, newname, linkname)
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else:
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posix.symlink(linkname, newname)
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sys.exit(main())
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