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6
cells/test/test.nix Normal file
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{
inputs,
cell,
}: {
hello = "world";
}

27
flake.lock generated Normal file
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{
"nodes": {
"nixpkgs": {
"locked": {
"lastModified": 1754340878,
"narHash": "sha256-lgmUyVQL9tSnvvIvBp7x1euhkkCho7n3TMzgjdvgPoU=",
"owner": "nixos",
"repo": "nixpkgs",
"rev": "cab778239e705082fe97bb4990e0d24c50924c04",
"type": "github"
},
"original": {
"owner": "nixos",
"ref": "nixpkgs-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 7
}

21
flake.nix Normal file
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{
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
};
outputs = inputs: let
rensa = import ./lib {
inherit (inputs.nixpkgs) lib;
};
in
rensa.buildWith {
inherit inputs;
cellsFrom = ./cells;
cellBlocks = [
{
name = "test";
type = "test";
}
];
} {};
}

2
lib/blocks/default.nix Normal file
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{
}

5
lib/compat/default.nix Normal file
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{l}: rec {
filter = import ./filter.nix {inherit l;};
select = import ./select.nix {inherit filter;};
get = import ./get.nix {inherit select;};
}

30
lib/compat/filter.nix Normal file
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{l}: let
filter = pred: t: p: let
multiplePaths = l.isList (l.elemAt p 0);
hoist = path: let
result =
l.filterAttrs (
n: v:
(l.elem n l.systems.doubles.all)
&& (l.hasAttrByPath path v)
)
t;
in
if result == {}
then builtins.abort "[ren] filter: Path ${toString path} not found in any targets."
else
l.mapAttrs (
_: v: let
attr = l.getAttrFromPath path v;
in
if pred == true
then attr
else l.filterAttrs pred attr
)
result;
in
if multiplePaths
then l.foldl' l.recursiveUpdate {} (map (path: hoist path) p)
else hoist p;
in
filter

8
lib/compat/get.nix Normal file
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{select}: let
get = t: p: let
r = select t p;
s = builtins.head (builtins.attrNames r);
in
r.${s};
in
get

2
lib/compat/select.nix Normal file
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{filter}:
filter true

86
lib/core/builder.nix Normal file
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{
l,
utils,
loader,
}: let
inherit (utils) accumulate;
inherit (loader) createCellLoader;
build = {
inputs,
cellsFrom,
cellBlocks,
systems ? [
"x86_64-linux"
"aarch64-linux"
"x86_64-darwin"
"aarch64-darwin"
],
}: let
cells = res.output;
loadOutputFor = system: let
loadCell = createCellLoader {
inherit inputs system cells cellsFrom cellBlocks;
};
cells' = l.mapAttrsToList (cell: type: cell) (l.readDir cellsFrom);
res = accumulate (l.map loadCell cells');
in [
{${system} = res.output;}
{${system} = res.actions;}
{
name = system;
value = res.init;
}
];
res = accumulate (l.map loadOutputFor systems);
in
res.output
// {
__ren = {
__schema = "v0";
init = l.listToAttrs res.init;
actions = res.actions;
cellsFrom = l.baseNameOf cellsFrom;
};
};
buildWith = args: let
inherit (builtins) head isAttrs length;
inherit (l.lists) elemAt flatten take;
g = p: l: r: v: let
attrPath = take 2 p;
v1 = !(isAttrs l && isAttrs r);
v2 =
if attrPath == ["__ren" "init"]
then flatten v
else head v;
in [v1 v2];
recursiveUpdateUntil = g: lhs: rhs: let
f = attrPath:
l.zipAttrsWith (
n: values: let
a = g here (elemAt values 1) (head values) values;
here = attrPath ++ [n];
in
if length values == 1 || head a
then elemAt a 1
else f here values
);
in
f [] [rhs lhs];
recursiveUpdate = lhs: rhs:
recursiveUpdateUntil g lhs rhs;
in
build args
// {
__functor = l.flip recursiveUpdate;
};
in {
inherit build buildWith;
}

503
lib/core/call-flake-LICENSE.md Normal file
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115
lib/core/call-flake.nix Normal file
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# Adapted from https://github.com/divnix/call-flake
# see ./call-flake-LICENSE.md for the LICENSE
ref: inputOverrides: let
inherit (builtins) fetchTree removeAttrs;
dir = ref.dir or "";
src =
if builtins.isPath ref || builtins.isString ref
then {outPath = ref;}
else
builtins.fetchTree (
if builtins.isAttrs ref
then builtins.removeAttrs ref ["dir"]
else ref
);
lockFileStr = let
rootlock = "${src}/flake.lock";
sublock = "${src}/${dir}/flake.lock";
in
if dir == "" && builtins.pathExists rootlock
then builtins.readFile rootlock
else if dir != "" && builtins.pathExists sublock
then builtins.readFile sublock
else
builtins.toJSON {
nodes.root = {};
root = "root";
};
overrides =
{
root = {
sourceInfo = src;
subdir = dir;
inputs = inputOverrides.root or {};
};
}
// (
builtins.mapAttrs
(key: inputs: {inherit inputs;})
(builtins.removeAttrs inputOverrides ["root"])
);
lockFile = builtins.fromJSON lockFileStr;
# Resolve a input spec into a node name. An input spec is
# either a node name, or a 'follows' path from the root
# node.
resolveInput = inputSpec:
if builtins.isList inputSpec
then getInputByPath lockFile.root inputSpec
else inputSpec;
# Follow an input path (e.g. ["dwarffs" "nixpkgs"]) from the
# root node, returning the final node.
getInputByPath = nodeName: path:
if path == []
then nodeName
else
getInputByPath
(resolveInput lockFile.nodes.${nodeName}.inputs.${builtins.head path})
(builtins.tail path);
allNodes =
builtins.mapAttrs (
key: node: let
sourceInfo =
if overrides ? ${key} && overrides.${key} ? "sourceInfo"
then overrides.${key}.sourceInfo
else fetchTree (node.info or {} // removeAttrs node.locked ["dir"]);
subdir = overrides.${key}.dir or node.locked.dir or "";
outPath =
sourceInfo
+ (
(
if subdir == ""
then ""
else "/"
)
+ subdir
);
flake = import (outPath + "/flake.nix");
inputs =
builtins.mapAttrs
(inputName: inputSpec: allNodes.${resolveInput inputSpec})
(node.inputs or {});
outputs = flake.outputs (inputs // {self = result;} // (overrides.${key}.inputs or {}));
result =
outputs
# We add the sourceInfo attribute for its metadata, as they are
# relevant metadata for the flake. However, the outPath of the
# sourceInfo does not necessarily match the outPath of the flake,
# as the flake may be in a subdirectory of a source.
# This is shadowed in the next //
// sourceInfo
// {
# This shadows the sourceInfo.outPath
inherit outPath inputs outputs sourceInfo;
_type = "flake";
};
in
if node.flake or true
then assert builtins.isFunction flake.outputs; result
else sourceInfo
)
lockFile.nodes;
in
allNodes.${lockFile.root}

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{
l,
utils,
}: let
paths = import ./paths.nix;
callFlake = import ./call-flake.nix;
loader = import ./loader.nix {inherit l utils paths callFlake;};
builder = import ./builder.nix {inherit l utils loader;};
in {
inherit (builder) build buildWith;
}

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{
l,
utils,
paths,
callFlake,
}: let
inherit (utils) optionalLoad createImportSignature;
createCellBlockLoader = {
inputs,
system,
cells,
}: let
importSignatureFor = createImportSignature {inherit inputs;};
loadCellBlock = cellName: cellP: cellBlock: let
blockP = paths.cellBlockPath cellP cellBlock;
isFile = l.pathExists blockP.file;
isDir = l.pathExists blockP.dir;
signature = let
cell = cells // {__cr = [cellName cellBlock.name];};
additionalInputs =
if l.pathExists cellP.flake
then (callFlake (builtins.dirOf cellP.flake) {root.parent = inputs;}).outputs
else {};
in
importSignatureFor system cell cells additionalInputs;
import' = importPath: let
block = import importPath;
in
if l.typeOf block == "set"
then block
else block signature;
importPaths =
if isFile
then {
displayPath = blockP.file';
importPath = blockP.file;
}
else if isDir
then {
displayPath = blockP.dir';
importPath = blockP.dir;
}
else throw "Neither ${blockP.file} nor ${blockP.dir} exist, this shouldn't happen!";
targetTracer = name: l.traceVerbose "[ren] loading, system=${system} path=${importPaths.importPath} name=${name}";
imported = import' importPaths.importPath;
isAttrs = builtins.isAttrs imported;
cellOptions = imported.__cell or {};
targetOverrides = cellOptions.targets or null;
extracted = l.traceVerbose "[ren] extracting ${importPaths.displayPath}. cli=${toString (cellBlock.cli or false)}" (
l.optionalAttrs (cellBlock.cli or false)
(l.mapAttrs (name: target: let
fragment = ''"${system}"."${cellName}"."${cellBlock.name}"."${name}"'';
actions' =
if cellBlock ? actions
then
l.listToAttrs (
map (a: l.nameValuePair a.name a)
(cellBlock.actions {
inherit target fragment inputs system;
fragmentRelPath = "${cellName}/${cellBlock.name}/${name}";
})
)
else {};
in {
init = targetTracer name {
inherit name;
actions =
l.mapAttrsToList (name: a: {
inherit name;
inherit (a) description;
requiresArgs =
if (target ? meta && target.meta ? requiresArgs)
then (builtins.elem name target.meta.requiresArgs)
else false;
})
actions';
};
actions = l.mapAttrs (_: a: a.command) actions';
})
(
if targetOverrides != null
then targetOverrides
else imported
))
);
in
optionalLoad (isFile || isDir) (
assert l.assertMsg isAttrs "cell block does not return an attrset: ${importPaths.displayPath}";
l.traceVerbose "[ren] loading cell block ${cellBlock.name}, type ${cellBlock.type}, from cell ${cellP}"
[
{${cellBlock.name} = imported;}
{${cellBlock.name} = l.mapAttrs (_: set: set.actions) extracted;}
({
cellBlock = cellBlock.name;
blockType = cellBlock.type;
targets = l.mapAttrsToList (_: set: set.init) extracted;
}
// (l.optionalAttrs (l.pathExists blockP.readmeDir) {readme = blockP.readmeDir;})
// (l.optionalAttrs (l.pathExists blockP.readme) {inherit (blockP) readme;}))
]
);
in
loadCellBlock;
createCellLoader = {
inputs,
system,
cells,
cellsFrom,
cellBlocks,
}: let
inherit (utils) unique accumulate;
loadCellBlock = createCellBlockLoader {inherit inputs system cells;};
loadCell = cellName: let
cellP = paths.cellPath cellsFrom cellName;
cellBlocks' = (unique cellBlocks).result;
res = accumulate (l.map (loadCellBlock cellName cellP) cellBlocks');
in [
{${cellName} = res.output;}
{${cellName} = res.actions;}
({
cell = cellName;
cellBlocks = res.init;
}
// (l.optionalAttrs (l.pathExists cellP.readme) {inherit (cellP) readme;}))
];
in
loadCell;
in {
inherit createCellLoader createCellBlockLoader;
}

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rec {
cellPath = cellsFrom: cellName: {
__toString = _: "${cellsFrom}/${cellName}";
flake = "${cellsFrom}/${cellName}/flake.nix";
readme = "${cellsFrom}/${cellName}/README.md";
rel = "${builtins.baseNameOf cellsFrom}/${cellName}";
};
cellBlockPath = cellPath': cellBlock: {
__toString = _: "${cellPath'}/${cellBlock.name}";
file = "${cellPath'}/${cellBlock.name}.nix";
file' = "${cellPath'.rel}/${cellBlock.name}.nix";
dir = "${cellPath'}/${cellBlock.name}/default.nix";
dir' = "${cellPath'.rel}/${cellBlock.name}/default.nix";
readme = "${cellPath'}/${cellBlock.name}.md";
readmeDir = "${cellPath'}/${cellBlock.name}/README.md";
};
targetPath = cellsFrom: cellName: cellBlock: let
cellBlockPath' = cellBlockPath (cellPath cellsFrom cellName) cellBlock;
in
name: {
readme = "${cellBlockPath'}/${name}.md";
};
}

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{lib}: let
l = builtins // lib;
utils = import ./utils {inherit l;};
core = import ./core {inherit l utils;};
compat = import ./compat {inherit l;};
in {
inherit (compat) filter select get;
inherit (core) build buildWith;
# TODO:
# blocks = import ./blocks;
}

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{
"nodes": {
"nixpkgs-lib": {
"locked": {
"lastModified": 1754184128,
"narHash": "sha256-AjhoyBL4eSyXf01Bmc6DiuaMrJRNdWopmdnMY0Pa/M0=",
"owner": "nix-community",
"repo": "nixpkgs.lib",
"rev": "02e72200e6d56494f4a7c0da8118760736e41b60",
"type": "github"
},
"original": {
"owner": "nix-community",
"repo": "nixpkgs.lib",
"type": "github"
}
},
"root": {
"inputs": {
"nixpkgs-lib": "nixpkgs-lib"
}
}
},
"root": "root",
"version": 7
}

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{
inputs = {
nixpkgs-lib.url = "github:nix-community/nixpkgs.lib";
};
outputs = inputs: {
lib = import ./. {
inherit (inputs.nixpkgs-lib) lib;
};
};
}

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{l}: let
unique =
l.foldl' (
acc: e:
if l.elem e.name acc.visited
then acc
else {
visited = acc.visited ++ [e.name];
result = acc.result ++ [e];
}
) {
visited = [];
result = [];
};
accumulate =
l.foldl' (
acc: new: let
first = l.head new;
cdr = l.tail new;
second = l.head cdr;
cdr' = l.tail cdr;
third = l.head cdr';
in
(
if first == null
then {inherit (acc) output;}
else {output = acc.output // first;}
)
// (
if second == null
then {inherit (acc) actions;}
else {actions = acc.actions // second;}
)
// (
if third == null
then {inherit (acc) init;}
else {init = acc.init ++ [third];}
)
) {
output = {};
actions = {};
init = [];
};
optionalLoad = cond: elem:
if cond
then elem
else [
null # empty output
null # empty action
null # empty init
];
in {
inherit unique accumulate optionalLoad;
}

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{l}: {
inherit (import ./accumulate.nix {inherit l;}) accumulate unique optionalLoad;
inherit (import ./import-signature.nix {inherit l;}) createImportSignature deSystemize;
}

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{l}: let
deSystemize = let
iteration = cutoff: system: fragment:
if !(l.isAttrs fragment) || cutoff == 0
then fragment
else let
recursed = l.mapAttrs (_: iteration (cutoff - 1) system) fragment;
in
if l.hasAttr "${system}" fragment
then
if l.isFunction fragment.${system}
then recursed // {__functor = _: fragment.${system};}
else recursed // fragment.${system}
else recursed;
in
iteration 3;
createImportSignature = cfg: system: cell: cells: additionalInputs: let
self =
cfg.inputs.self.sourceInfo
// {
rev = cfg.inputs.self.sourceInfo.rev or "not-a-commit";
};
in {
inputs =
(deSystemize system (cfg.inputs // additionalInputs))
// {
inherit self;
cells = deSystemize system cells;
};
inherit cell;
};
in {
inherit deSystemize createImportSignature;
}