Create explicit CI job matrix (#585)

- Replace matrix expansion with explicit job matrix in `.travis.yml`
- Remove legacy `sudo: false` from `.travis.yml`
- Make prebuilds on Node.js Current instead of 8. Technically this does
  not matter; it's the Node.js headers we build against that matter
  (dictated by the `-t 8.14.0` flag we pass to `prebuildify`). However,
  making the prebuilds on Current means we won't have to change this
  job in the future (e.g. when removing Node.js 8)
- Use tar in AppVeyor too
- Add gzip compression to tar commands and shorten commands
- Rename `linux` to `linux-x64` to communicate absence of `x86`
- Rename `osx` to `darwin-x64`, same, as well as to match node platform
- Rename `win-x64` to `win32-x64`, same
- Create ARM prebuild(s) in separate job, only on tagged commits, skip
  tests and coverage.

.travis.yml

@@ -1,24 +1,41 @@
-sudo: false
-
 language: node_js
 
-os:
-  - osx
-  - linux
+jobs:
+  include:
+    - os: linux
+      node_js: 8
+      env: [TEST_CMD=test]
+    - os: linux
+      node_js: 10
+      env: [TEST_CMD=test]
+    - os: linux
+      node_js: node
+      env: [TEST_CMD=test, BUILD_CMD=prebuild, BUILD_GROUP=linux-x64]
+    - os: osx
+      node_js: 8
+      env: [TEST_CMD=test]
+    - os: osx
+      node_js: 10
+      env: [TEST_CMD=test]
+    - os: osx
+      node_js: node
+      env: [TEST_CMD=test, BUILD_CMD=prebuild, BUILD_GROUP=darwin-x64]
+    - name: arm
+      os: linux
+      node_js: node
+      env: [BUILD_CMD=prebuildify-cross-armv7, BUILD_GROUP=arm]
+      if: tag is present
 
-node_js:
-  - 8
-  - 10
-  - node
+script:
+  - if [[ ! -z "$TEST_CMD" ]]; then npm run $TEST_CMD; fi
 
 after_success:
-  - npm run coverage
+  - if [[ ! -z "$TEST_CMD" ]]; then npm run coverage; fi
 
 before_deploy:
-  - export ARCHIVE_NAME="${TRAVIS_TAG:-latest}-$TRAVIS_OS_NAME.tar"
-  - npm run prebuild
-  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then npm run prebuildify-cross-armv7; fi
-  - tar --create --verbose --file="$ARCHIVE_NAME" --directory "$TRAVIS_BUILD_DIR/prebuilds" .
+  - export ARCHIVE_NAME="${TRAVIS_TAG:-latest}-$BUILD_GROUP.tar.gz"
+  - npm run $BUILD_CMD
+  - tar -zcvf "$ARCHIVE_NAME" -C prebuilds .
 
 deploy:
   provider: releases
@@ -28,4 +45,4 @@ deploy:
   skip_cleanup: true
   on:
     tags: true
-    node: '8'
+    condition: "! -z $BUILD_CMD"

appveyor.yml

@@ -23,20 +23,18 @@ test_script:
   - npm --version
   - npm test
 
-after_test:
-  - ps: If ($env:nodejs_version -eq "8") { npm run prebuild }
-
-artifacts:
-  - path: prebuilds
-    name: $(APPVEYOR_REPO_TAG_NAME)-win-$(PLATFORM)
-    type: zip
+before_deploy:
+  - SET ARCHIVE_NAME=%APPVEYOR_REPO_TAG_NAME%-win32-%PLATFORM%.tar.gz
+  - npm run prebuild
+  - tar -zcvf "%ARCHIVE_NAME%" -C prebuilds .
+  - appveyor PushArtifact %ARCHIVE_NAME%
 
 deploy:
   - provider: GitHub
-    artifact: /.*\.zip/
+    artifact: $(ARCHIVE_NAME)
     auth_token:
       secure: AjmYV2zeogfen7F6tXvR9PO1zynJVF/jhMCExQ9RMtqEHDMH8Frclym3GniZkEB0
     draft: false
     on:
       appveyor_repo_tag: true
-      nodejs_version: "8"
+      nodejs_version: "Current"