New languages: CSS preprocessors

backend/src/langs.ts

@@ -631,6 +631,17 @@ PLEASE GIVE UP
     createEmpty: true,
     run: `SHELL=/usr/bin/ksh HOME="$PWD" ksh`,
     template: `echo "Hello, world!"
+`,
+  },
+  less: {
+    aliases: ["lessc"],
+    name: "Less",
+    monacoLang: "less",
+    main: "main.less",
+    run: "lessc main.less",
+    template: `body:before {
+  content: "Hello, world!";
+}
 `,
   },
   llvm: {
@@ -1034,6 +1045,15 @@ binding_irb.run(IRB.conf)
     template: `fn main() {
     println!("Hello, world!");
 }
+`,
+  },
+  sass: {
+    name: "Sass",
+    monacoLang: "plaintext",
+    main: "main.sass",
+    run: "sass main.sass",
+    template: `body:before
+  content: "Hello, world!"
 `,
   },
   scala: {
@@ -1055,6 +1075,16 @@ binding_irb.run(IRB.conf)
     template: `(begin
   (display "Hello, world!")
   (newline))
+`,
+  },
+  scss: {
+    name: "SCSS",
+    monacoLang: "scss",
+    main: "main.scss",
+    run: "sass main.scss",
+    template: `body:before {
+  content: "Hello, world!";
+}
 `,
   },
   sh: {

scripts/docker-install-phase4.bash

@@ -52,6 +52,9 @@ pip3 install fortran-language-server
 # Julia
 julia -e 'using Pkg; Pkg.add("LanguageServer")'
 
+# Less
+npm install -g less
+
 # Perl
 cpanm -n Devel::REPL
 
@@ -70,6 +73,9 @@ gem install solargraph
 # Rust
 rustup component add rls rust-analysis rust-src
 
+# Sass/SCSS
+npm install -g sass
+
 # Shakespeare
 pip3 install shakespearelang