add cross-compile script

tools/setup-cross-compile-env.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env sh
+
+set -euxo pipefail
+
+cat <<EOF
+
+This script is meant for usage inside a Docker image, with boundaryml/baml
+mounted into the image as a volume; it installs necessary dependencies for
+cross-compiling BAML.
+
+To start such a Docker image with BAML mounted directly:
+
+  docker run -v ~/baml2:/baml2 -it node bash
+  docker run -v ~/baml3:/baml3 -it node:alpine sh
+
+Note that we do _not_ suggest running this script against ~/baml - it will require you
+to nuke your node_modules
+
+EOF
+
+# Install curl based on the detected operating system
+if [ -f /etc/os-release ]; then
+    case "$(grep '^ID=' /etc/os-release | cut -d= -f2)" in
+        amzn|amazonlinux)
+            yum install -y curl
+            ;;
+        alpine)
+            apk add --no-cache curl bash
+            ;;
+        ubuntu|debian)
+            # apt-get update && apt-get install -y curl
+            apt install -y curl
+            ;;
+        *)
+            echo "Unsupported operating system. Please install curl manually."
+            exit 1
+            ;;
+    esac
+else
+    echo "Unable to detect operating system. Please install curl manually."
+    exit 1
+fi
+
+# set up mise
+curl https://mise.run | sh
+~/.local/bin/mise install -y pnpm
+
+# set up rust
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+
+# set up bashrc startup
+cat >~/.bashrc <<'EOF'
+eval "$(~/.local/bin/mise activate bash)"
+. ~/.cargo/env
+export PS1="[mise][rust] $PS1"
+EOF
+
+echo "Starting bash shell - run 'exit' or press Ctrl-D to close session"
+
+bash