feat: add support for environment variables in Cloud Functions

package/lib/compileFunctions.js

@@ -43,6 +43,15 @@ module.exports = {
       funcTemplate.properties.timeout = _.get(funcObject, 'timeout')
         || _.get(this, 'serverless.service.provider.timeout')
         || '60s';
+      funcTemplate.properties.environmentVariables = _.merge(
+        _.get(this, 'serverless.service.provider.environment'),
+        funcObject.environment,
+      );
+
+      if (!_.size(funcTemplate.properties.environmentVariables)) {
+        delete funcTemplate.properties.environmentVariables;
+      }
+
       funcTemplate.properties.labels = _.assign({},
         _.get(this, 'serverless.service.provider.labels') || {},
         _.get(funcObject, 'labels') || {},

package/lib/compileFunctions.test.js

@@ -360,6 +360,86 @@ describe('CompileFunctions', () => {
       });
     });
 
+    it('should set the environment variables based on the function configuration', () => {
+      googlePackage.serverless.service.functions = {
+        func1: {
+          handler: 'func1',
+          environment: {
+            TEST_VAR: 'test',
+          },
+          events: [
+            { http: 'foo' },
+          ],
+        },
+      };
+
+      const compiledResources = [{
+        type: 'cloudfunctions.v1beta2.function',
+        name: 'my-service-dev-func1',
+        properties: {
+          location: 'us-central1',
+          runtime: 'nodejs8',
+          function: 'func1',
+          availableMemoryMb: 256,
+          environmentVariables: {
+            TEST_VAR: 'test',
+          },
+          timeout: '60s',
+          sourceArchiveUrl: 'gs://sls-my-service-dev-12345678/some-path/artifact.zip',
+          httpsTrigger: {
+            url: 'foo',
+          },
+          labels: {},
+        },
+      }];
+
+      return googlePackage.compileFunctions().then(() => {
+        expect(consoleLogStub.calledOnce).toEqual(true);
+        expect(googlePackage.serverless.service.provider.compiledConfigurationTemplate.resources)
+          .toEqual(compiledResources);
+      });
+    });
+
+    it('should set the environment variables based on the provider configuration', () => {
+      googlePackage.serverless.service.functions = {
+        func1: {
+          handler: 'func1',
+          events: [
+            { http: 'foo' },
+          ],
+        },
+      };
+      googlePackage.serverless.service.provider.environment = {
+        TEST_VAR: 'test',
+      };
+
+      const compiledResources = [{
+        type: 'cloudfunctions.v1beta2.function',
+        name: 'my-service-dev-func1',
+        properties: {
+          location: 'us-central1',
+          runtime: 'nodejs8',
+          function: 'func1',
+          availableMemoryMb: 256,
+          environmentVariables: {
+            TEST_VAR: 'test',
+          },
+          timeout: '60s',
+          sourceArchiveUrl: 'gs://sls-my-service-dev-12345678/some-path/artifact.zip',
+          httpsTrigger: {
+            url: 'foo',
+          },
+          labels: {},
+        },
+      }];
+
+      return googlePackage.compileFunctions().then(() => {
+        expect(consoleLogStub.calledOnce).toEqual(true);
+        expect(googlePackage.serverless.service.provider.compiledConfigurationTemplate.resources)
+          .toEqual(compiledResources);
+      });
+    });
+
     it('should compile "http" events properly', () => {
       googlePackage.serverless.service.functions = {
         func1: {