Merge pre-install scripts

package.json

@@ -78,7 +78,7 @@
   "scripts": {
     "lint:fix": "eslint --fix app.js \"lib/**/*.js\" \"test/**/*.js\"",
     "lint": "eslint app.js \"lib/**/*.js\" \"test/**/*.js\"",
-    "preinstall": "./scripts/darwin-pre-install.sh",
+    "preinstall": "scripts/darwin-pre-install.sh",
     "pretest:setup": "npm run lint",
     "test:setup": "NODE_ENV=test node test setup",
     "pretest": "npm run test:setup",

scripts/darwin-pre-install.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/opt/X11/lib/pkgconfig
+    CAIRO_PKG_CONFIG=`pkg-config cairo --cflags-only-I 2> /dev/null`
+    RESULT=$?
+
+    if [[ ${RESULT} -ne 0 ]]; then
+        echo "###################################################################################"
+        echo "#                            PREINSTALL HOOK ERROR                                #"
+        echo "#---------------------------------------------------------------------------------#"
+        echo "#                                                                                 #"
+        echo "# node-canvas install error: some packages required by 'cairo' are not found      #"
+        echo "#                                                                                 #"
+        echo -e "# Use '\033[1mmake all\033[0m', it will take care of common/known issues                        #"
+        echo "#                                                                                 #"
+        echo "# As an alternative try:                                                          #"
+        echo "# Try to 'export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/opt/X11/lib/pkgconfig' #"
+        echo "#                                                                                 #"
+        echo "# If problems persist visit: https://github.com/Automattic/node-canvas/wiki       #"
+        echo "#                                                                                 #"
+        echo "###################################################################################"
+        exit 1
+    fi
+fi