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author | Matthieu Coudron <teto@users.noreply.github.com> | 2023-04-23 20:45:01 +0200 |
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committer | GitHub <noreply@github.com> | 2023-04-23 20:45:01 +0200 |
commit | 377b6c7bc1c586dfd049520eaba8b9381206048e (patch) | |
tree | 069030f46b3ce97ce3436d03a47b03c3543bba2c /lib | |
parent | 8c5ec460034ec26ce37dd71e0c4d8fd79b7b48d3 (diff) | |
parent | e9b416168a8dc4ce8d9ebdd571e83b5162d18df5 (diff) |
Merge pull request #225496 from ony/feature/generators-toLua
lib/generators: add toLua/mkLuaInline
Diffstat (limited to 'lib')
-rw-r--r-- | lib/generators.nix | 77 | ||||
-rw-r--r-- | lib/tests/misc.nix | 66 |
2 files changed, 143 insertions, 0 deletions
diff --git a/lib/generators.nix b/lib/generators.nix index 4357a03533984..4ecbdac3c125e 100644 --- a/lib/generators.nix +++ b/lib/generators.nix @@ -426,4 +426,81 @@ ${expr "" v} abort "generators.toDhall: cannot convert a null to Dhall" else builtins.toJSON v; + + /* + Translate a simple Nix expression to Lua representation with occasional + Lua-inlines that can be construted by mkLuaInline function. + + Configuration: + * multiline - by default is true which results in indented block-like view. + * indent - initial indent. + + Attention: + Regardless of multiline parameter there is no trailing newline. + + Example: + generators.toLua {} + { + cmd = [ "typescript-language-server" "--stdio" ]; + settings.workspace.library = mkLuaInline ''vim.api.nvim_get_runtime_file("", true)''; + } + -> + { + ["cmd"] = { + "typescript-language-server", + "--stdio" + }, + ["settings"] = { + ["workspace"] = { + ["library"] = (vim.api.nvim_get_runtime_file("", true)) + } + } + } + + Type: + toLua :: AttrSet -> Any -> String + */ + toLua = { + /* If this option is true, the output is indented with newlines for attribute sets and lists */ + multiline ? true, + /* Initial indentation level */ + indent ? "" + }@args: v: + with builtins; + let + innerIndent = "${indent} "; + introSpace = if multiline then "\n${innerIndent}" else " "; + outroSpace = if multiline then "\n${indent}" else " "; + innerArgs = args // { indent = innerIndent; }; + concatItems = concatStringsSep ",${introSpace}"; + isLuaInline = { _type ? null, ... }: _type == "lua-inline"; + in + if v == null then + "nil" + else if isInt v || isFloat v || isString v || isBool v then + builtins.toJSON v + else if isList v then + (if v == [ ] then "{}" else + "{${introSpace}${concatItems (map (value: "${toLua innerArgs value}") v)}${outroSpace}}") + else if isAttrs v then + ( + if isLuaInline v then + "(${v.expr})" + else if v == { } then + "{}" + else + "{${introSpace}${concatItems ( + lib.attrsets.mapAttrsToList (key: value: "[${builtins.toJSON key}] = ${toLua innerArgs value}") v + )}${outroSpace}}" + ) + else + abort "generators.toLua: type ${typeOf v} is unsupported"; + + /* + Mark string as Lua expression to be inlined when processed by toLua. + + Type: + mkLuaInline :: String -> AttrSet + */ + mkLuaInline = expr: { _type = "lua-inline"; inherit expr; }; } diff --git a/lib/tests/misc.nix b/lib/tests/misc.nix index baa382f3e589c..49336b8b96301 100644 --- a/lib/tests/misc.nix +++ b/lib/tests/misc.nix @@ -915,6 +915,72 @@ runTests { }; + testToLuaEmptyAttrSet = { + expr = generators.toLua {} {}; + expected = ''{}''; + }; + + testToLuaEmptyList = { + expr = generators.toLua {} []; + expected = ''{}''; + }; + + testToLuaListOfVariousTypes = { + expr = generators.toLua {} [ null 43 3.14159 true ]; + expected = '' + { + nil, + 43, + 3.14159, + true + }''; + }; + + testToLuaString = { + expr = generators.toLua {} ''double-quote (") and single quotes (')''; + expected = ''"double-quote (\") and single quotes (')"''; + }; + + testToLuaAttrsetWithLuaInline = { + expr = generators.toLua {} { x = generators.mkLuaInline ''"abc" .. "def"''; }; + expected = '' + { + ["x"] = ("abc" .. "def") + }''; + }; + + testToLuaAttrsetWithSpaceInKey = { + expr = generators.toLua {} { "some space and double-quote (\")" = 42; }; + expected = '' + { + ["some space and double-quote (\")"] = 42 + }''; + }; + + testToLuaWithoutMultiline = { + expr = generators.toLua { multiline = false; } [ 41 43 ]; + expected = ''{ 41, 43 }''; + }; + + testToLuaBasicExample = { + expr = generators.toLua {} { + cmd = [ "typescript-language-server" "--stdio" ]; + settings.workspace.library = generators.mkLuaInline ''vim.api.nvim_get_runtime_file("", true)''; + }; + expected = '' + { + ["cmd"] = { + "typescript-language-server", + "--stdio" + }, + ["settings"] = { + ["workspace"] = { + ["library"] = (vim.api.nvim_get_runtime_file("", true)) + } + } + }''; + }; + # CLI testToGNUCommandLine = { |