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|
with builtins;
rec {
splitLines = s: filter (x: !isList x) (split "\n" s);
concatStrings = concatStringsSep "";
attrsToList =
a:
map (name: {
inherit name;
value = a.${name};
}) (builtins.attrNames a);
replaceStringsRec =
from: to: string:
# recursively replace occurrences of `from` with `to` within `string`
# example:
# replaceStringRec "--" "-" "hello-----world"
# => "hello-world"
let
replaced = replaceStrings [ from ] [ to ] string;
in
if replaced == string then string else replaceStringsRec from to replaced;
squash = replaceStringsRec "\n\n\n" "\n\n";
trim =
string:
# trim trailing spaces and squash non-leading spaces
let
trimLine =
line:
let
# separate leading spaces from the rest
parts = split "(^ *)" line;
spaces = head (elemAt parts 1);
rest = elemAt parts 2;
# drop trailing spaces
body = head (split " *$" rest);
in
spaces + replaceStringsRec " " " " body;
in
concatStringsSep "\n" (map trimLine (splitLines string));
# FIXME: O(n^2)
unique = foldl' (acc: e: if elem e acc then acc else acc ++ [ e ]) [ ];
nameValuePair = name: value: { inherit name value; };
filterAttrs =
pred: set:
listToAttrs (
concatMap (
name:
let
v = set.${name};
in
if pred name v then [ (nameValuePair name v) ] else [ ]
) (attrNames set)
);
optionalString = cond: string: if cond then string else "";
showSetting =
{ inlineHTML }:
name:
{
description,
documentDefault,
defaultValue,
aliases,
value,
experimentalFeature,
}:
let
result = squash ''
- ${
if inlineHTML then ''<span id="conf-${name}">[`${name}`](#conf-${name})</span>'' else ''`${name}`''
}
${indent " " body}
'';
experimentalFeatureNote = optionalString (experimentalFeature != null) ''
> **Warning**
> This setting is part of an
> [experimental feature](@docroot@/contributing/experimental-features.md).
To change this setting, you need to make sure the corresponding experimental feature,
[`${experimentalFeature}`](@docroot@/contributing/experimental-features.md#xp-feature-${experimentalFeature}),
is enabled.
For example, include the following in [`nix.conf`](#):
```
extra-experimental-features = ${experimentalFeature}
${name} = ...
```
'';
# separate body to cleanly handle indentation
body = ''
${description}
${experimentalFeatureNote}
**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:
optionalString (aliases != [ ])
"**Deprecated alias:** ${(concatStringsSep ", " (map (s: "`${s}`") aliases))}";
in
result;
indent =
prefix: s: concatStringsSep "\n" (map (x: if x == "" then x else "${prefix}${x}") (splitLines s));
showSettings =
args: settingsInfo: concatStrings (attrValues (mapAttrs (showSetting args) settingsInfo));
}
|
