38 lines
993 B
Factor
38 lines
993 B
Factor
! Copyright (C) 2008 Slava Pestov, Doug Coleman.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors io.backend io.files.info io.files.types
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io.pathnames kernel math namespaces system vocabs ;
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IN: io.files.links
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HOOK: make-link os ( target symlink -- )
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HOOK: make-hard-link os ( target link -- )
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HOOK: read-link os ( symlink -- path )
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: copy-link ( target symlink -- )
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[ read-link ] dip make-link ;
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os unix? [ "io.files.links.unix" require ] when
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: follow-link ( path -- path' )
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[ parent-directory ] [ read-link ] bi append-path ;
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SYMBOL: symlink-depth
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10 symlink-depth set-global
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ERROR: too-many-symlinks path n ;
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<PRIVATE
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: (follow-links) ( n path -- path' )
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over 0 = [ symlink-depth get too-many-symlinks ] when
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dup link-info type>> +symbolic-link+ =
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[ [ 1 - ] [ follow-link ] bi* (follow-links) ]
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[ nip ] if ; inline recursive
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PRIVATE>
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: follow-links ( path -- path' )
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[ symlink-depth get ] dip normalize-path (follow-links) ;
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