Add Rust support

Dockerfile

@@ -485,6 +485,14 @@ RUN brew tap homebrew/bundle
 
 WORKDIR /
 
+################################################################################
+#
+# Rust toolchain & rustup
+#
+################################################################################
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+ENV PATH "$PATH:/opt/buildhome/.cargo/bin"
+
 # Cleanup
 USER root
 

run-build-functions.sh

@@ -57,6 +57,7 @@ mkdir -p $NETLIFY_CACHE_DIR/.composer
 mkdir -p $NETLIFY_CACHE_DIR/.gimme_cache/gopath
 mkdir -p $NETLIFY_CACHE_DIR/.gimme_cache/gocache
 mkdir -p $NETLIFY_CACHE_DIR/.homebrew-cache
+mkdir -p $NETLIFY_CACHE_DIR/.cargo
 
 : ${YARN_FLAGS=""}
 : ${NPM_FLAGS=""}
@@ -644,6 +645,16 @@ install_dependencies() {
     fi
   fi
 
+  # Rust
+  if [ -f Cargo.toml ] || [ -f Cargo.lock ]
+  then
+    restore_home_cache ".rustup" "rust rustup cache"
+    restore_home_cache ".cargo/registry" "rust cargo registry cache"
+    restore_home_cache ".cargo/bin" "rust cargo bin cache"
+    restore_cwd_cache "target" "rust compile output"
+    source $HOME/.cargo/env
+  fi
+
   # Setup project GOPATH
   if [ -n "$GO_IMPORT_PATH" ]
   then
@@ -664,6 +675,7 @@ cache_artifacts() {
   cache_cwd_directory ".venv" "python virtualenv"
   cache_cwd_directory ".build" "swift build"
   cache_cwd_directory ".netlify/plugins" "build plugins"
+  cache_cwd_directory "target" "rust compile output"
 
   cache_home_directory ".yarn_cache" "yarn cache"
   cache_home_directory ".cache/pip" "pip cache"
@@ -673,6 +685,9 @@ cache_artifacts() {
   cache_home_directory ".boot" "boot dependencies"
   cache_home_directory ".composer" "composer dependencies"
   cache_home_directory ".homebrew-cache", "homebrew cache"
+  cache_home_directory ".rustup" "rust rustup cache"
+  cache_home_directory ".cargo/registry" "rust cargo registry cache"
+  cache_home_directory ".cargo/bin" "rust cargo bin cache"
 
   # Don't follow the Go import path or we'll store
   # the origin repo twice.

run-build.sh

@@ -38,4 +38,6 @@ echo "Executing user command: $cmd"
 eval "$cmd"
 CODE=$?
 
+cache_artifacts
+
 exit $CODE