Transform all defines

tasks/generate-defines.js

@@ -0,0 +1,31 @@
+var fs = require('fs');
+var path = require('path');
+var esprima = require('esprima');
+
+var mainPath = path.join(__dirname, '..', 'src', 'ol', 'index.js');
+var mainSource = fs.readFileSync(mainPath, 'utf8');
+var definesPath = path.join(__dirname, '..', 'build', 'defines.json');
+
+function isDefineLikeStatement(statement) {
+  return statement.type === 'ExpressionStatement' &&
+      statement.expression && statement.expression.type === 'AssignmentExpression' &&
+      statement.expression.left.type === 'MemberExpression' &&
+      statement.expression.right.type === 'Literal' &&
+      statement.leadingComments;
+}
+
+var ast = esprima.parse(mainSource, {attachComment: true});
+var defines = {};
+ast.body.forEach(function(statement) {
+  if (isDefineLikeStatement(statement)) {
+    var comment = statement.leadingComments[statement.leadingComments.length - 1].value;
+    if (comment.indexOf('* @define {') >= 0) {
+      var expression = statement.expression;
+      var name = expression.left.object.name + '.' + expression.left.property.name;
+      var value = expression.right.value;
+      defines[name] = value;
+    }
+  }
+});
+
+fs.writeFileSync(definesPath, JSON.stringify(defines, null, 2));