start using ninja

.envrc

@@ -1,2 +1 @@
 use nix
-PATH_add ./node_modules/.bin

.gitignore

@@ -1,6 +1,8 @@
 /.cache
+/.ninja*
 /data
 /dist
+/index.js
 /log.txt
 /node_modules
 elm-stuff

build.ninja

@@ -0,0 +1,6 @@
+elmFlags=--debug
+
+rule elm
+  command = elm make $elmFlags --output=$out $in
+
+build index.js: elm src/Main.elm | elm.json src/Database/ID.elm src/Main.elm src/Selection.elm src/Database.elm src/Search.elm src/Html/Styled/Events/Extra.elm src/Content.elm src/Node.elm src/Route.elm src/Widgets/Colors.elm src/Widgets/Icons.elm src/Widgets/TimeDifference.elm src/Widgets/Text.elm src/Widgets/Button.elm 

script/build.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -eou pipefail
+
+ELM_FILES="$(find src -name '*.elm')"
+
+cat > build.ninja <<EOF
+elmFlags=--debug
+
+rule elm
+  command = elm make \$elmFlags --output=\$out \$in
+
+build index.js: elm src/Main.elm | elm.json $(echo "$ELM_FILES" | tr '\n' ' ')
+EOF
+
+ninja "$@"

shell.nix

@@ -13,8 +13,14 @@ stdenv.mkDerivation {
     niv.niv
     git
 
+    # elm
+    elmPackages.elm
+    elmPackages.elm-format
+    elmPackages.elm-test
+    # elmPackages.elm-json
+    # elmPackages.elm-review
+
     # building
-    nodejs-12_x
-    nodePackages.npm
+    ninja
   ] ++ lib.optionals stdenv.isDarwin darwinDeps;
 }