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function __z_clean -d "Clean up .z file to remove paths no longer valid"
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set -l tmpfile (mktemp $Z_DATA.XXXXXX)
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if test -f $tmpfile
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while read line
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set -l path (string split '|' $line)[1]
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test -d $path; and echo $line
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end <$Z_DATA >$tmpfile
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command mv -f $tmpfile $Z_DATA
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end
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end
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