Formatter and LSP for OCaml

backend/src/langs.ts

@@ -1158,6 +1158,9 @@ int main() {
     main: "main.ml",
     repl: "ocaml",
     run: "ocaml -init main.ml",
+    format: "ocamlformat main.ml",
+    lsp: "ocamllsp",
+    lspLang: "ocaml",
     template: `print_string "Hello, world!\\n";;
 `,
   },

scripts/docker-install-phase3c.bash

@@ -33,8 +33,9 @@ yarn
 gcc
 gnustep-devel
 
-# Ocaml
+# OCaml
 ocaml
+opam
 
 # Octave
 octave

scripts/docker-install-phase4.bash

@@ -8,6 +8,11 @@ set -x
 mkdir /opt/julia
 export JULIA_DEPOT_PATH=/opt/julia
 
+# Package manager - OCaml
+export OPAMROOT=/opt/opam
+export OPAMROOTISOK=1
+opam init -n --disable-sandboxing
+
 # Package manager - Node.js
 npm config set unsafe-perm true
 PERL_MM_USE_DEFAULT=1 cpan App::cpanminus
@@ -67,6 +72,12 @@ npm install -g less
 # LiveScript
 npm install -g livescript
 
+# OCaml
+opam install -y ocamlformat
+opam pin add -y ocaml-lsp-server https://github.com/ocaml/ocaml-lsp.git
+ln -s /opt/opam/default/bin/ocamlformat /usr/local/bin/ocamlformat
+ln -s /opt/opam/default/bin/ocamllsp /usr/local/bin/ocamllsp
+
 # Perl
 cpanm -n Devel::REPL