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let
inherit (builtins) attrNames concatStringsSep isAttrs isBool;
inherit (import ./utils.nix) concatStrings squash splitLines;
in
optionsInfo:
let
showOption = name:
let
inherit (optionsInfo.${name}) description documentDefault defaultValue aliases;
result = squash ''
- <span id="conf-${name}">[`${name}`](#conf-${name})</span>
${indent " " body}
'';
# separate body to cleanly handle indentation
body = ''
${description}
**Default:** ${showDefault documentDefault defaultValue}
${showAliases aliases}
'';
showDefault = documentDefault: defaultValue:
if documentDefault then
# a StringMap value type is specified as a string, but
# this shows the value type. The empty stringmap is `null` in
# JSON, but that converts to `{ }` here.
if defaultValue == "" || defaultValue == [] || isAttrs defaultValue
then "*empty*"
else if isBool defaultValue then
if defaultValue then "`true`" else "`false`"
else "`${toString defaultValue}`"
else "*machine-specific*";
showAliases = aliases:
if aliases == [] then "" else
"**Deprecated alias:** ${(concatStringsSep ", " (map (s: "`${s}`") aliases))}";
indent = prefix: s:
concatStringsSep "\n" (map (x: if x == "" then x else "${prefix}${x}") (splitLines s));
in result;
in concatStrings (map showOption (attrNames optionsInfo))
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