commit 3aeff518bb9ebf0918a0bb013d66ee56fa415033 Author: technofab Date: Tue Aug 5 14:55:13 2025 +0200 chore: initial commit diff --git a/cells/test/test.nix b/cells/test/test.nix new file mode 100644 index 0000000..c086227 --- /dev/null +++ b/cells/test/test.nix @@ -0,0 +1,6 @@ +{ + inputs, + cell, +}: { + hello = "world"; +} diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..0c15488 --- /dev/null +++ b/flake.lock @@ -0,0 +1,27 @@ +{ + "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 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..70f677d --- /dev/null +++ b/flake.nix @@ -0,0 +1,21 @@ +{ + 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"; + } + ]; + } {}; +} diff --git a/lib/blocks/default.nix b/lib/blocks/default.nix new file mode 100644 index 0000000..2c63c08 --- /dev/null +++ b/lib/blocks/default.nix @@ -0,0 +1,2 @@ +{ +} diff --git a/lib/compat/default.nix b/lib/compat/default.nix new file mode 100644 index 0000000..44aca74 --- /dev/null +++ b/lib/compat/default.nix @@ -0,0 +1,5 @@ +{l}: rec { + filter = import ./filter.nix {inherit l;}; + select = import ./select.nix {inherit filter;}; + get = import ./get.nix {inherit select;}; +} diff --git a/lib/compat/filter.nix b/lib/compat/filter.nix new file mode 100644 index 0000000..b6f1f99 --- /dev/null +++ b/lib/compat/filter.nix @@ -0,0 +1,30 @@ +{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 ${toString path} not found in any targets." + else + l.mapAttrs ( + _: v: let + attr = l.getAttrFromPath path v; + in + if pred == true + then attr + else l.filterAttrs pred attr + ) + result; + in + if multiplePaths + then l.foldl' l.recursiveUpdate {} (map (path: hoist path) p) + else hoist p; +in + filter diff --git a/lib/compat/get.nix b/lib/compat/get.nix new file mode 100644 index 0000000..b3e9aa8 --- /dev/null +++ b/lib/compat/get.nix @@ -0,0 +1,8 @@ +{select}: let + get = t: p: let + r = select t p; + s = builtins.head (builtins.attrNames r); + in + r.${s}; +in + get diff --git a/lib/compat/select.nix b/lib/compat/select.nix new file mode 100644 index 0000000..a374a8f --- /dev/null +++ b/lib/compat/select.nix @@ -0,0 +1,2 @@ +{filter}: +filter true diff --git a/lib/core/builder.nix b/lib/core/builder.nix new file mode 100644 index 0000000..9418e65 --- /dev/null +++ b/lib/core/builder.nix @@ -0,0 +1,86 @@ +{ + 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; +} diff --git a/lib/core/call-flake-LICENSE.md b/lib/core/call-flake-LICENSE.md new file mode 100644 index 0000000..744bb9f --- /dev/null +++ b/lib/core/call-flake-LICENSE.md @@ -0,0 +1,503 @@ + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. 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See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +Also add information on how to contact you by electronic and paper mail. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the library, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random Hacker. + + , 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! + diff --git a/lib/core/call-flake.nix b/lib/core/call-flake.nix new file mode 100644 index 0000000..6bd325a --- /dev/null +++ b/lib/core/call-flake.nix @@ -0,0 +1,115 @@ +# 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} diff --git a/lib/core/default.nix b/lib/core/default.nix new file mode 100644 index 0000000..25a3f44 --- /dev/null +++ b/lib/core/default.nix @@ -0,0 +1,11 @@ +{ + 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; +} diff --git a/lib/core/loader.nix b/lib/core/loader.nix new file mode 100644 index 0000000..4809640 --- /dev/null +++ b/lib/core/loader.nix @@ -0,0 +1,140 @@ +{ + 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;} + {${cellName} = res.actions;} + ({ + cell = cellName; + cellBlocks = res.init; + } + // (l.optionalAttrs (l.pathExists cellP.readme) {inherit (cellP) readme;})) + ]; + in + loadCell; +in { + inherit createCellLoader createCellBlockLoader; +} diff --git a/lib/core/paths.nix b/lib/core/paths.nix new file mode 100644 index 0000000..83e0115 --- /dev/null +++ b/lib/core/paths.nix @@ -0,0 +1,23 @@ +rec { + cellPath = cellsFrom: cellName: { + __toString = _: "${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"; + }; +} diff --git a/lib/default.nix b/lib/default.nix new file mode 100644 index 0000000..69896b9 --- /dev/null +++ b/lib/default.nix @@ -0,0 +1,11 @@ +{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; +} diff --git a/lib/flake.lock b/lib/flake.lock new file mode 100644 index 0000000..f7915ba --- /dev/null +++ b/lib/flake.lock @@ -0,0 +1,26 @@ +{ + "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 +} diff --git a/lib/flake.nix b/lib/flake.nix new file mode 100644 index 0000000..f31baae --- /dev/null +++ b/lib/flake.nix @@ -0,0 +1,11 @@ +{ + inputs = { + nixpkgs-lib.url = "github:nix-community/nixpkgs.lib"; + }; + + outputs = inputs: { + lib = import ./. { + inherit (inputs.nixpkgs-lib) lib; + }; + }; +} diff --git a/lib/utils/accumulate.nix b/lib/utils/accumulate.nix new file mode 100644 index 0000000..eeec041 --- /dev/null +++ b/lib/utils/accumulate.nix @@ -0,0 +1,56 @@ +{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; +} diff --git a/lib/utils/default.nix b/lib/utils/default.nix new file mode 100644 index 0000000..a07dff0 --- /dev/null +++ b/lib/utils/default.nix @@ -0,0 +1,4 @@ +{l}: { + inherit (import ./accumulate.nix {inherit l;}) accumulate unique optionalLoad; + inherit (import ./import-signature.nix {inherit l;}) createImportSignature deSystemize; +} diff --git a/lib/utils/import-signature.nix b/lib/utils/import-signature.nix new file mode 100644 index 0000000..7550820 --- /dev/null +++ b/lib/utils/import-signature.nix @@ -0,0 +1,35 @@ +{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; +}