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