refactor(tree): rewrite in std

.editorconfig

@@ -0,0 +1,10 @@
+# Editor configuration, see http://editorconfig.org
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = space
+indent_size = 2

.envrc

@@ -0,0 +1,17 @@
+#! /bin/sh
+
+# SPDX-FileCopyrightText: 2022 David Arnold <[email protected]>
+# SPDX-FileCopyrightText: 2022 Kevin Amado <[email protected]>
+#
+# SPDX-License-Identifier: Unlicense
+
+source "$(
+  nix eval \
+  --no-update-lock-file \
+  --no-write-lock-file \
+  --no-warn-dirty \
+  --accept-flake-config \
+  .#__std.direnv_lib 2>/dev/null \
+  || nix eval .#__std.direnv_lib # show the errors
+)"
+use std cells //_automation/devshells:default

.github/workflows/tests.yml

@@ -0,0 +1,28 @@
+name: Test all package sets
+
+on:
+  push:
+    branches:
+      - main
+  merge_request:
+  workflow_dispatch:
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/[email protected]
+
+    - name: Install latest nix
+      uses: cachix/install-nix-action@v18
+      with:
+        extra_nix_config: |
+          substituters = https://cache.nixos.org https://nix-community.cachix.org https://fog.cachix.org
+          trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs= fog.cachix.org-1:FAxiA6qMLoXEUdEq+HaT24g1MjnxdfygrbrLDBp6U/s=
+        nix_path: nixpkgs=channel:nixos-unstable
+
+    - name: Quick eval
+      run: nix develop --show-trace --print-build-logs --command evalnix
+
+    - name: Run all tests
+      run: nix develop --show-trace --print-build-logs .#devShells.x86_64-linux.checks --command run-all

.gitignore

@@ -0,0 +1,9 @@
+# SPDX-FileCopyrightText: 2022 David Arnold <[email protected]>
+# SPDX-FileCopyrightText: 2022 Kevin Amado <[email protected]>
+#
+# SPDX-License-Identifier: Unlicense
+
+.std
+/**/flake.lock
+result
+.direnv

cells/_automation/devshells.nix

@@ -0,0 +1,80 @@
+{
+  inputs,
+  cell,
+}: let
+  l = nixpkgs.lib // builtins;
+  inherit (inputs) cells nixpkgs std;
+in
+  l.mapAttrs (_: std.lib.dev.mkShell) {
+    default = {
+      extraModulesPath,
+      pkgs,
+      ...
+    }: {
+      name = "devos-ext-lib";
+
+      git.hooks = {
+        enable = true;
+        pre-commit.text = builtins.readFile ./devshells/pre-flight-check.sh;
+      };
+
+      imports = [
+        std.std.devshellProfiles.default
+        "${extraModulesPath}/git/hooks.nix"
+      ];
+
+      packages = [
+        # formatters
+        nixpkgs.alejandra
+      ];
+
+      commands = with cell.lib.categories; [
+        (formatters nixpkgs.treefmt)
+        (formatters nixpkgs.editorconfig-checker)
+        (legal nixpkgs.reuse)
+        (utils {
+          name = "evalnix";
+          help = "Check Nix parsing";
+          command = "${nixpkgs.fd}/bin/fd --extension nix --exec ${nixpkgs.nix}/bin/nix-instantiate --parse --quiet {} >/dev/null";
+        })
+        (utils cell.packages.repl)
+      ];
+    };
+
+    checks = {...}: {
+      name = "checks";
+      imports = [std.std.devshellProfiles.default];
+      commands = let
+        tests = cells.std.lib.trimBy cells ["tests"];
+        testToCommand = l.mapAttrsToList (otherCell: targets: let
+          targetToTest =
+            l.mapAttrsToList (targetName: value: {
+              name = otherCell + "-" + targetName;
+              command = l.concatStringsSep "; " [
+                "echo -n '${value.description} \n  => '"
+                (
+                  if value.result == value.expected
+                  then "echo 'PASSED!'"
+                  else "echo 'FAILED! Run `nix develop .#devShells.${nixpkgs.system}.default --command repl` to inspect the problem. \n  => trace: Flake.${nixpkgs.system}.${otherCell}.tests.${targetName}'; export checks=1"
+                )
+              ];
+            })
+            targets;
+        in
+          targetToTest)
+        tests;
+        testCommands = l.flatten testToCommand;
+        testNames = l.catAttrs "name" testCommands;
+      in
+        [
+          {
+            name = "run-all";
+            command = l.concatStringsSep "; " (testNames
+              ++ [
+                "[[ -z \${checks+x} ]] && echo 'All tests passed!' || { echo 'Some tests failed!' && exit 1; }"
+              ]);
+          }
+        ]
+        ++ testCommands;
+    };
+  }

cells/_automation/devshells/pre-flight-check.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: 2022 The Standard Authors
+# SPDX-FileCopyrightText: 2022 Kevin Amado <[email protected]>
+#
+# SPDX-License-Identifier: Unlicense
+
+if git rev-parse --verify HEAD >/dev/null 2>&1; then
+  against=HEAD
+else
+  # Initial commit: diff against an empty tree object
+  against=$(${git}/bin/git hash-object -t tree /dev/null)
+fi
+
+diff="git diff-index --name-only --cached $against --diff-filter d"
+all_files=($($diff))
+
+# Format the entire tree.
+treefmt
+
+# check editorconfig
+editorconfig-checker -- "${all_files[@]}"
+if [[ $? != '0' ]]; then
+  printf "%b\n" \
+    "\nCode is not aligned with .editorconfig" \
+    "Review the output and commit your fixes" >&2
+  exit 1
+fi

cells/_automation/lib.nix

@@ -0,0 +1,36 @@
+{
+  inputs,
+  cell,
+}: let
+  l = inputs.nixpkgs.lib // builtins;
+
+  cmdWithCategory = category: attrs: attrs // {inherit category;};
+
+  pkgWithCategory = category: package: cmdWithCategory category {inherit package;};
+
+  withCategory = category: attrs: let
+    mapWith =
+      if l.isDerivation attrs
+      then pkgWithCategory
+      else cmdWithCategory;
+  in
+    mapWith category attrs;
+
+  mkCategories = categories: attrs: let
+    withCategories = l.genAttrs categories (category: withCategory category);
+  in
+    withCategories // attrs;
+
+  categories = [
+    "cli-dev"
+    "devos"
+    "docs"
+    "formatters"
+    "legal"
+    "utils"
+  ];
+in {
+  categories = mkCategories categories {
+    inherit cmdWithCategory pkgWithCategory withCategory categories;
+  };
+}

cells/_automation/packages.nix

@@ -0,0 +1,14 @@
+{
+  inputs,
+  cell,
+}: let
+  inherit (inputs) nixpkgs;
+in {
+  repl = nixpkgs.writeShellScriptBin "repl" ''
+    if [ -z "$1" ]; then
+      nix repl --argstr host "$HOST" --argstr flakePath "$PRJ_ROOT" --file ${./packages/repl/repl.nix}
+    else
+      nix repl --argstr host "$HOST" --argstr flakePath $(readlink -f $1 | sed 's|/flake.nix||') --file ${./packages/repl/repl.nix} ''${@: 1}
+    fi
+  '';
+}

cells/_automation/packages/repl/repl.nix

@@ -0,0 +1,23 @@
+# Adapted on 3rd of July 2021 from
+# https://github.com/gytis-ivaskevicius/flake-utils-plus/blob/438316a7b7d798bff326c97da8e2b15a56c7657e/lib/repl.nix
+{
+  flakePath,
+  host,
+}: let
+  Flake =
+    if builtins.pathExists flakePath
+    then builtins.getFlake (toString flakePath)
+    else {};
+
+  Me = Flake.nixosConfigurations.${host} or {};
+  Channels = Flake.pkgs.${builtins.currentSystem} or {};
+
+  LoadFlake = path: builtins.getFlake (toString path);
+in {
+  inherit
+    Channels
+    Flake
+    LoadFlake
+    Me
+    ;
+}