feat: Prevent sources from being installed in slug

Author: kylef

bin/compile

@@ -34,6 +34,7 @@ source "$BIN_DIR/steps/hooks/pre_compile"
 source "$BIN_DIR/steps/swift-build"
 source "$BIN_DIR/steps/swift-install"
 source "$BIN_DIR/steps/libatomic-install"
+source "$BIN_DIR/steps/slug-cleanup"
 
 # Setup application environment
 mkdir -p $BUILD_DIR/.profile.d

bin/steps/slug-cleanup

@@ -0,0 +1,12 @@
+# Remove unnnessecary files from being included in the slug
+
+remove() {
+  if [ -r "$1" ]; then
+    rm -fr "$1"
+  fi
+}
+
+remove "$BUILD_DIR/Package.swift"
+remove "$BUILD_DIR/Package.resolved"
+remove "$BUILD_DIR/Sources"
+remove "$BUILD_DIR/Tests"