| #! /usr/local/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, posix, path |
| |
| 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 path.isdir(oldtree): |
| print oldtree + ': not a directory' |
| return 1 |
| try: |
| posix.mkdir(newtree, 0777) |
| except posix.error, msg: |
| print newtree + ': cannot mkdir:', msg |
| return 1 |
| linkname = path.cat(newtree, link) |
| try: |
| posix.symlink(path.cat('..', oldtree), linkname) |
| except posix.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 = posix.listdir(old) |
| except posix.error, msg: |
| print old + ': warning: cannot listdir:', msg |
| return |
| for name in names: |
| if name not in ('.', '..'): |
| oldname = path.cat(old, name) |
| linkname = path.cat(link, name) |
| newname = path.cat(new, name) |
| if debug > 1: print oldname, newname, linkname |
| if path.isdir(oldname) and not path.islink(oldname): |
| try: |
| posix.mkdir(newname, 0777) |
| ok = 1 |
| except: |
| print newname + ': warning: cannot mkdir:', msg |
| ok = 0 |
| if ok: |
| linkname = path.cat('..', linkname) |
| linknames(oldname, newname, linkname) |
| else: |
| posix.symlink(linkname, newname) |
| |
| sys.exit(main()) |