| 1 | n/a | #! /usr/bin/env python3 |
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| 2 | n/a | |
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| 3 | n/a | # linktree |
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| 4 | n/a | # |
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| 5 | n/a | # Make a copy of a directory tree with symbolic links to all files in the |
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| 6 | n/a | # original tree. |
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| 7 | n/a | # All symbolic links go to a special symbolic link at the top, so you |
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| 8 | n/a | # can easily fix things if the original source tree moves. |
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| 9 | n/a | # See also "mkreal". |
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| 10 | n/a | # |
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| 11 | n/a | # usage: mklinks oldtree newtree |
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| 12 | n/a | |
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| 13 | n/a | import sys, os |
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| 14 | n/a | |
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| 15 | n/a | LINK = '.LINK' # Name of special symlink at the top. |
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| 16 | n/a | |
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| 17 | n/a | debug = 0 |
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| 18 | n/a | |
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| 19 | n/a | def main(): |
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| 20 | n/a | if not 3 <= len(sys.argv) <= 4: |
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| 21 | n/a | print('usage:', sys.argv[0], 'oldtree newtree [linkto]') |
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| 22 | n/a | return 2 |
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| 23 | n/a | oldtree, newtree = sys.argv[1], sys.argv[2] |
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| 24 | n/a | if len(sys.argv) > 3: |
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| 25 | n/a | link = sys.argv[3] |
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| 26 | n/a | link_may_fail = 1 |
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| 27 | n/a | else: |
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| 28 | n/a | link = LINK |
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| 29 | n/a | link_may_fail = 0 |
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| 30 | n/a | if not os.path.isdir(oldtree): |
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| 31 | n/a | print(oldtree + ': not a directory') |
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| 32 | n/a | return 1 |
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| 33 | n/a | try: |
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| 34 | n/a | os.mkdir(newtree, 0o777) |
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| 35 | n/a | except OSError as msg: |
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| 36 | n/a | print(newtree + ': cannot mkdir:', msg) |
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| 37 | n/a | return 1 |
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| 38 | n/a | linkname = os.path.join(newtree, link) |
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| 39 | n/a | try: |
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| 40 | n/a | os.symlink(os.path.join(os.pardir, oldtree), linkname) |
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| 41 | n/a | except OSError as msg: |
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| 42 | n/a | if not link_may_fail: |
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| 43 | n/a | print(linkname + ': cannot symlink:', msg) |
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| 44 | n/a | return 1 |
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| 45 | n/a | else: |
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| 46 | n/a | print(linkname + ': warning: cannot symlink:', msg) |
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| 47 | n/a | linknames(oldtree, newtree, link) |
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| 48 | n/a | return 0 |
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| 49 | n/a | |
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| 50 | n/a | def linknames(old, new, link): |
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| 51 | n/a | if debug: print('linknames', (old, new, link)) |
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| 52 | n/a | try: |
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| 53 | n/a | names = os.listdir(old) |
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| 54 | n/a | except OSError as msg: |
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| 55 | n/a | print(old + ': warning: cannot listdir:', msg) |
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| 56 | n/a | return |
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| 57 | n/a | for name in names: |
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| 58 | n/a | if name not in (os.curdir, os.pardir): |
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| 59 | n/a | oldname = os.path.join(old, name) |
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| 60 | n/a | linkname = os.path.join(link, name) |
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| 61 | n/a | newname = os.path.join(new, name) |
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| 62 | n/a | if debug > 1: print(oldname, newname, linkname) |
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| 63 | n/a | if os.path.isdir(oldname) and \ |
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| 64 | n/a | not os.path.islink(oldname): |
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| 65 | n/a | try: |
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| 66 | n/a | os.mkdir(newname, 0o777) |
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| 67 | n/a | ok = 1 |
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| 68 | n/a | except: |
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| 69 | n/a | print(newname + \ |
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| 70 | n/a | ': warning: cannot mkdir:', msg) |
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| 71 | n/a | ok = 0 |
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| 72 | n/a | if ok: |
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| 73 | n/a | linkname = os.path.join(os.pardir, |
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| 74 | n/a | linkname) |
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| 75 | n/a | linknames(oldname, newname, linkname) |
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| 76 | n/a | else: |
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| 77 | n/a | os.symlink(linkname, newname) |
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| 78 | n/a | |
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| 79 | n/a | if __name__ == '__main__': |
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| 80 | n/a | sys.exit(main()) |
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