82 lines
1.8 KiB
Plaintext
82 lines
1.8 KiB
Plaintext
/* Tool to sort attribute sets. Primarily useful for keeping
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all-packages.nix tidy.
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To compile:
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$ strc -i ../../maintainers/scripts/sort-attrs.str -la stratego-lib
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Typical invocation:
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$ sglr -m -p ~/Dev/nix/src/libexpr/nix.tbl -i all-packages.nix \
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| implode-asfix --lex \
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| ../../maintainers/scripts/sort-attrs \
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| asfix-yield
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*/
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module sort-attrs
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imports
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libstratego-lib
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libstratego-sglr
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strategies
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no-wsp = !appl(prod([], cf(opt(layout())), no-attrs()), [])
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rules
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list-sep(s): [] -> []
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list-sep(s): [x | xs] -> [[x | before] | <list-sep(s)> [split | after]]
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where
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<split-fetch-keep(s)> xs => (before, split, after)
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list-sep(s): [x | xs] -> [[x | xs]]
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where
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<not(split-fetch-keep(s))> xs
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sort-attrs:
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appl(p@prod(_, _, attrs([term(cons("Attrs"))])),
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[ lit("{")
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, ws1
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, appl(p2@list(cf(iter-star(sort("Bind")))), attrs)
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, ws2
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, lit("}")
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]
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) ->
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appl(p, [lit("{"), <no-wsp>, appl(p2, <concat> attrs'), ws2, lit("}")])
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where
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<debug> "found it";
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<attach-wsp> [ws1 | attrs] => withWSP;
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<list-sep(starts-section)> withWSP => groups;
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<length; debug> groups;
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<map( \[x | xs] -> [x | <qsort(compare-attrs)> xs]\ )> groups => attrs';
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<debug> "did it"
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attach-wsp: [a, b | cs] -> [(a, b) | <attach-wsp> cs]
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attach-wsp: [] -> []
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starts-section: x@(appl(prod([cf(layout())], cf(opt(layout())), no-attrs()), cs), attr) -> x
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where <implode-string; is-substring(!"###")> cs
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compare-attrs:
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x@
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( (_, appl(p1@prod(_, _, attrs([term(cons("Bind"))])), [id1 | xs1]))
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, (_, appl(p2@prod(_, _, attrs([term(cons("Bind"))])), [id2 | xs2]))
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)
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-> x
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where
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<string-lt> (id1, id2)
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strategies
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main = io-wrap(
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topdown(try(sort-attrs))
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)
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