Only install ui dependencies when necessary

Author: daniel-va

ui/DockerfileDev

@@ -5,7 +5,6 @@ ENV NODE_ENV=development
 ARG GITHUB_TOKEN
 ENV GITHUB_TOKEN=${GITHUB_TOKEN}
 
-
 RUN apk add --no-cache git bash \
   && npm update -g npm
 

ui/package-lock.json

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+set -e
+
+# The files that, when changed, trigger an install.
+LOCK_FILES="package.json package-lock.json"
+
+# The file into which the latest install hash is stored.
+HASH_FILE="node_modules/.deps-lock_hash"
+
+# The file that marks the node version that was used for the latest install.
+NODE_MARKER_FILE="node_modules/.deps-node_$(node -v)"
+
+# Compute the hash of the current and latest dependencies.
+current_hash="$(cat $LOCK_FILES 2>/dev/null | sha256sum | awk '{print $1}')"
+stored_hash="$(cat "$HASH_FILE" 2>/dev/null || true)"
+
+if [ ! -d node_modules ] || [ "$current_hash" != "$stored_hash" ] || [ ! -f "$NODE_MARKER_FILE" ]; then
+  # Reinstall if the lock files or node version changed, or if there simply is no `node_modules` directory.
+  echo "Dependencies out of date -> running install"
+  npm ci
+  printf "%s" "$current_hash" > "$HASH_FILE"
+  : > "$NODE_MARKER_FILE"
+else
+  echo "Dependencies up of date -> skipping install"
+fi

ui/scripts/install-dependencies.sh

@@ -1,10 +1,12 @@
 #!/bin/bash
 
+set -e
+
 # Install latest dependencies.
-npm ci --no-audit
+scripts/install-dependencies.sh
 
 # Remove previous build output.
-rm -r dist/*
+rm -rf dist/*
 
 # Start the development server.
 npm run start