template: add elm project

Author: smoothprogrammer

template/elm/.editorconfig

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+; https://editorconfig.org
+root = true
+
+; default configuration
+[*]
+charset = utf-8
+end_of_line = lf
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = unset
+
+[{*.nix,flake.lock}]
+indent_style = space
+indent_size = 2
+
+[*.json]
+indent_style = space
+indent_size = 2
+
+[*.md]
+indent_style = space
+indent_size = 2
+
+[*.elm]
+indent_style = space
+indent_size = 4

template/elm/.envrc

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+use flake

template/elm/.github/workflows/main.yaml

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+name: main
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+env:
+  CI_NIX_STORE: ~/nix
+  CI_NIX_FLAKE: .#default
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Nix
+        uses: cachix/install-nix-action@v26
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Cache Nix
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CI_NIX_STORE }}
+          key: ${{ runner.os }}-nix-${{ hashFiles('flake.nix', 'flake.lock') }}
+      - name: Lint
+        run: |
+          nix --store ${{ env.CI_NIX_STORE }} \
+            develop ${{ env.CI_NIX_FLAKE }} --command \
+            editorconfig-checker && echo "ok"

template/elm/.gitignore

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+# elm-package generated files
+elm-stuff
+# elm-repl generated files
+repl-temp-*

template/elm/Makefile

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+run:
+	@elm reactor

template/elm/README.md

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+# Elm Project

template/elm/elm.json

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+{
+    "type": "application",
+    "source-directories": [
+        "src"
+    ],
+    "elm-version": "0.19.1",
+    "dependencies": {
+        "direct": {
+            "elm/browser": "1.0.2",
+            "elm/core": "1.0.5",
+            "elm/html": "1.0.0"
+        },
+        "indirect": {
+            "elm/json": "1.1.3",
+            "elm/time": "1.0.0",
+            "elm/url": "1.0.0",
+            "elm/virtual-dom": "1.0.3"
+        }
+    },
+    "test-dependencies": {
+        "direct": {},
+        "indirect": {}
+    }
+}

template/elm/flake.lock

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+{
+  description = "Elm Project";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+  outputs =
+    { nixpkgs, ... }:
+    let
+      forAllSystems = nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed;
+    in
+    {
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        {
+          default = pkgs.mkShell {
+            name = "elm-project";
+            shellHook = ''
+              git config pull.rebase true
+              ${pkgs.neo-cowsay}/bin/cowsay -f sage "Elm Project"
+            '';
+            buildInputs = with pkgs; [
+              editorconfig-checker
+              elmPackages.elm
+            ];
+          };
+        }
+      );
+    };
+}

template/elm/flake.nix

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+module Main exposing (main)
+
+import Browser
+import Html exposing (..)
+
+
+main : Program () Model Msg
+main =
+    Browser.sandbox
+        { init = init
+        , view = view
+        , update = update
+        }
+
+
+type alias Model =
+    { text : String }
+
+
+init : Model
+init =
+    { text = "Hello, World!" }
+
+
+view : Model -> Html Msg
+view model =
+    div [] [ text model.text ]
+
+
+type Msg
+    = Noop
+
+
+update : Msg -> Model -> Model
+update msg model =
+    case msg of
+        Noop ->
+            model