[node] Drop node 4.x support

circle.yml

@@ -24,10 +24,6 @@ workflows:
               only: /android-v.*/
             branches:
               ignore: /.*/
-      - node4-clang39-release:
-          filters:
-            tags:
-              only: /node-.*/
       - node6-clang39-release:
           filters:
             tags:
@@ -56,10 +52,6 @@ workflows:
               ignore: /.*/
       - macos-debug
       - macos-debug-qt5
-      - macos-release-node4:
-          filters:
-            tags:
-              only: /node-.*/
       - macos-release-node6:
           filters:
             tags:
@@ -166,13 +158,6 @@ step-library:
         command: |
           brew install cmake ccache
 
-  - &install-macos-node4-dependencies
-      run:
-        name: Install macOS Node@4 dependencies
-        command: |
-          brew install node@4
-          brew link node@4 --force --overwrite
-
   - &install-macos-node6-dependencies
       run:
         name: Install macOS Node@6 dependencies
@@ -530,29 +515,6 @@ jobs:
           command: make run-android-upload-archives
 
 
-# ------------------------------------------------------------------------------
-  node4-clang39-release:
-    docker:
-      - image: mbgl/7d2403f42e:linux-clang-3.9-node-4
-    working_directory: /src
-    environment:
-      LIBSYSCONFCPUS: 4
-      JOBS: 4
-      BUILDTYPE: RelWithDebInfo
-      WITH_EGL: 1
-      WITH_CXX11ABI: 0
-    steps:
-      - checkout
-      - *generate-cache-key
-      - *restore-cache
-      - *reset-ccache-stats
-      - *build-node
-      - *show-ccache-stats
-      - *save-cache
-      - *run-node-linux-tests
-      - *publish-node-package
-      - *upload-render-tests
-
 # ------------------------------------------------------------------------------
   node6-clang39-release:
     docker:
@@ -993,29 +955,6 @@ jobs:
           path: test/fixtures
           destination: test/fixtures
 
-# ------------------------------------------------------------------------------
-  macos-release-node4:
-    macos:
-      xcode: "9.4.0"
-    environment:
-      BUILDTYPE: RelWithDebInfo
-      HOMEBREW_NO_AUTO_UPDATE: 1
-    steps:
-      - checkout
-      - *install-macos-dependencies
-      - *install-macos-node4-dependencies
-      - *generate-cache-key
-      - *restore-cache
-      - *reset-ccache-stats
-      - *build-node
-      - *show-ccache-stats
-      - *save-cache
-      - *run-node-macos-tests
-      - *publish-node-package
-      - *upload-render-tests
-      - *collect-xcode-build-logs
-      - *upload-xcode-build-logs
-
 # ------------------------------------------------------------------------------
   macos-release-node6:
     macos:

cmake/node.cmake

@@ -21,7 +21,10 @@ create_source_groups(mbgl-loop-node)
 add_node_module(mbgl-node
     INSTALL_PATH "lib/{node_abi}/mbgl.node"
     NAN_VERSION "2.10.0"
-    EXCLUDE_NODE_ABIS 47 51 59 # Don't build old beta ABIs 5.x, 7.x, and 9.x
+    
+    # Don't build for Node 4.x, 5.x, 7.x, or 9.x
+    # See https://nodejs.org/en/download/releases/ for mapping of Node version to ABI number
+    EXCLUDE_NODE_ABIS 46 47 51 59
 )
 
 target_sources(mbgl-node INTERFACE

package.json

@@ -33,7 +33,7 @@
     "tape": "^4.5.1"
   },
   "engines": {
-    "node": ">=4.2.1"
+    "node": ">=6"
   },
   "scripts": {
     "preinstall": "npm install node-pre-gyp",