forked from DGNum/liminix
91 lines
3 KiB
Fennel
91 lines
3 KiB
Fennel
(local yaml (require :lyaml))
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(local { : view } (require :fennel))
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(fn headline [name]
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(let [(_ _ basename) (string.find name ".*/([^/].*)")
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len (basename:len)]
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(print basename)
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(print (string.rep "=" len))))
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(fn read-preamble [pathname]
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(if (= (pathname:sub 1 1) "/")
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(let [pathname (if (string.match pathname ".nix$")
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pathname
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(.. pathname "/default.nix"))]
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(with-open [f (assert (io.open pathname :r))]
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(accumulate [lines ""
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l (f:lines)
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:until (not (= (string.sub l 1 2) "##"))]
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(.. lines (string.gsub l "^## *" "") "\n"))))))
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(fn strip-newlines [text]
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(-> text
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(string.gsub "\n([^\n])" " %1")
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(string.gsub "\n\n+" "\n")))
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(fn indent [n text]
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(let [margin (string.rep " " n)]
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(.. margin (string.gsub (or text "") "\n +" (.. "\n" margin )))))
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(fn indent-literal [n text]
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(let [margin (string.rep " " n)]
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(.. margin (string.gsub (or text "") "\n" (.. "\n" margin )))))
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(fn extract-text [description]
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(match description
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{ :_type "literalExpression" : text } text
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(where s (= (type s) "string")) description
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_ nil))
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(fn print-option [o offset]
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(let [i (or offset 0)]
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(print (indent i (.. " * option ``" o.name "``")))
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(case (-?> o.description extract-text strip-newlines)
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descr (print (indent (+ 4 i) descr)))
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(print)
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(print (indent (+ 4 i) (.. "**type** " o.type "\n")))
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(when o.example
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(print (indent (+ 4 i) "**example**")) (print)
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(print (indent (+ 4 i) ".. code-block:: nix"))
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(print)
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(print (indent-literal (+ 8 i) (extract-text o.example)) "\n")
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(print))
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(when (extract-text o.default)
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(print (indent (+ 4 i) "**default**")) (print)
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(print (indent (+ 4 i) ".. code-block:: nix"))
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(print)
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(print (indent-literal (+ 8 i) (extract-text o.default)) "\n")
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(print))))
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(fn print-service [o]
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(print (.. " * service ``" o.name "``"))
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(print (indent 4 (or (extract-text o.description) "(no description)")))
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(print)
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(print (indent 4 "**Service parameters**\n"))
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(each [_ param (ipairs o.parameters)]
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(print-option param 4)))
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(fn sort-options [module]
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(table.sort module (fn [a b] (< a.name b.name)))
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module)
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(let [raw (yaml.load (io.read "*a"))
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modules {}]
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(each [_ option (ipairs raw)]
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(each [_ path (ipairs option.declarations)]
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(let [e (or (. modules path) [])]
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(table.insert e option)
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(tset modules path e))))
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(tset modules "lib/modules.nix" nil)
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(let [module-names (doto (icollect [n _ (pairs modules)] n) table.sort)]
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(io.stderr:write (view module-names))
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(each [_ name (ipairs module-names)]
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(let [module (. modules name)
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options (sort-options module)]
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(print (or (read-preamble name) (headline name)))
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(each [_ o (ipairs options)]
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(if (= o.type "parametrisable s6-rc service definition")
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(print-service o)
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(print-option o)))))))
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