Add Dhall

backend/src/langs.ts

@@ -312,6 +312,15 @@ void main() {
     template: `void main() {
   print('Hello, world!');
 }
+`,
+  },
+  dhall: {
+    name: "Dhall",
+    monacoLang: "plaintext",
+    main: "main.dhall",
+    compile: "cat main.dhall | dhall-to-json > main.json",
+    run: "cat main.json | jq .",
+    template: `{ output = "Hello, world!" }
 `,
   },
   elixir: {

scripts/docker-install-phase3a.bash

@@ -55,6 +55,9 @@ crystal
 # Dart
 dart
 
+# Dhall
+dhall
+
 "
 
 export DEBIAN_FRONTEND=noninteractive

scripts/docker-install-phase5.bash

@@ -31,6 +31,13 @@ wget -nv http://downloads.dlang.org/releases/2.x/2.092.0/dmd_2.092.0-0_amd64.deb
 dpkg -i dmd_*.deb
 rm dmd_*.deb
 
+# Dhall
+wget -nv https://github.com/dhall-lang/dhall-haskell/releases/download/1.33.1/dhall-json-1.7.0-x86_64-linux.tar.bz2
+mkdir dhall-json
+tar -xf dhall-json-*-x86_64-linux.tar.bz2 -C dhall-json
+mv dhall-json/bin/dhall-to-json dhall-json/bin/json-to-dhall /usr/bin/
+rm dhall-json dhall-json-*-x86_64-linux.tar.bz2
+
 # Elixir
 wget -nv https://github.com/elixir-lsp/elixir-ls/releases/download/v0.5.0/elixir-ls.zip
 unzip -d /opt/elixir-ls elixir-ls.zip