Use --target instead of building with each node version

Author: zbjornson

.travis.yml

@@ -9,6 +9,10 @@ osx_image: xcode9.3
 install:
   - export PREBUILD_SLUG=$TRAVIS_REPO_SLUG
   - export PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig" #node-gfx/node-canvas-prebuilt#76
+  - >-
+    source ~/.nvm/nvm.sh
+    nvm use 10 || { nvm install 10; nvm use 10; }
+    npm install -g node-gyp
   - >- # this should only run on linux
     if [ $TRAVIS_OS_NAME = "linux" ]; then
 

appveyor.yml

@@ -1,7 +1,7 @@
 version: 0.0.{build}
 image: Visual Studio 2017
 install:
-  - ps: Install-Product node 8 x64
+  - ps: Install-Product node 10 x64
   - set PREBUILD_SLUG=%APPVEYOR_REPO_NAME%
   - npm install -g npm node-gyp
   - set "PATH=%APPDATA%\npm;%PATH%"

ci/install.sh

@@ -32,13 +32,11 @@ source ci/$OS/preinstall.sh
 cp ci/$OS/binding.gyp node-canvas/binding.gyp
 
 for ver in $NODEJS_VERSIONS; do 
-  echo "------------ Building with node $ver ------------"
-
-  source ci/$OS/node_version.sh $ver;
+  echo "------------ Building for node $ver ------------"
 
   cd node-canvas
 
-  node-gyp rebuild || {
+  node-gyp rebuild --target=$ver || {
     echo "error building in nodejs version $ver"
     exit 1;
   }
@@ -56,7 +54,6 @@ for ver in $NODEJS_VERSIONS; do
 done;
 
 echo "------------ Releasing with release.js ------------"
-source ci/$OS/node_version.sh 11
 node ci/release.js $PREBUILD_VERSION || exit 1;
 
 cd ..