install ocaml in dockerfile instead of postCreate.sh (#8230)

* install ocaml in dockerfile instead of postCreate.sh

* leave opam install in post create

* set up opam in postcreate

* install ocaml without switch

* init opam with vscode user

* remove manual shell setup for opam

* update changelog

Author: tsnobip

.devcontainer/Dockerfile

@@ -12,3 +12,8 @@ RUN sudo apt-get update && export DEBIAN_FRONTEND=noninteractive \
 # Install OPAM
 ARG OPAM_VERSION=2.5.0
 RUN printf '\n\n' | bash -c "sh <(curl -fsSL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh) --version $OPAM_VERSION"
+
+USER vscode
+ENV HOME=/home/vscode
+
+RUN opam init -y --shell-setup --enable-shell-hook --compiler=5.3.0 --disable-sandboxing

.devcontainer/postCreate.sh

@@ -1,15 +1,7 @@
 #!/bin/sh
 
 # Install dev dependencies from OPAM
-opam init -y --auto-setup --bare --disable-sandboxing
-opam switch create 5.3.0
 opam install . --with-test --with-dev-setup -y
 
-# Add OPAM environment setup to shell startup script
-echo 'eval $(opam env)' >> ~/.zshrc
-echo 'eval $(opam env)' >> ~/.bashrc
-
-nvm install
-
 corepack enable
 printf "\n" | yarn 

CHANGELOG.md

@@ -28,6 +28,8 @@
 
 #### :house: Internal
 
+- speed up dev container test by installing ocaml in docker image instead of in `postCreate.sh`. https://github.com/rescript-lang/rescript/pull/8230
+
 # 13.0.0-alpha.1
 
 #### :boom: Breaking Change