Initial Commit

.eslintrc.json

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+{
+    "env": {
+        "es6": true,
+        "node": true,
+        "jest": true
+    },
+    "extends": [
+        "eslint:recommended"
+    ],
+    "parserOptions": {
+        "sourceType": "module",
+        "ecmaVersion": 2017
+    },
+    "rules": {
+        "indent": [
+            "error",
+            4,
+            {
+                "SwitchCase": 1
+            }
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "double",
+            "avoid-escape"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ]
+    }
+}

.gitignore

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+node_modules
+.DS_Store

.travis.yml

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+branches:
+  only:
+  - master
+language: node_js
+node_js:
+  - "6"
+  - "8"
+  - "9"
+script:
+  - npm test
+  - npm run eslint

README.md

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+# Serverless Plugin IfElse
+While you can use serverless variables to define different values for your atrributes based on either stage or other properties, it sometimes is not as straightforward. 
+
+For example, If you have a serverless project with 3 functions and you want to deploy all 3 functions in one region but only 2 of them in other region, then there is no easier way to exlude the third function based on region you are deploying.
+
+Another use case that inspired me to write this plugin was, I wanted to use ```iamRoleStatements``` for all my Lambda functions in staging but use a pre-define ```role``` in production. You cannot have both attributes in serverless.yml file as serverless ignores ```iamRoleStatements``` if there is ```role``` attribute.
+
+This plugin allows you to write if else conditions in ```serverless.yml``` file to remove or change the values of attributes in the yml file. It works with both ```package``` and ```deploy``` commands. It also works with ```serverless-offline``` plugin.
+
+
+## Example
+serverless.yml
+```
+service: serverlessIfElseExample
+custom:
+  currentStage: ${opt:stage, self:provider.stage}  
+  serverlessIfElse:
+      - If: '"${self:custom.currentStage}" == "dev"'
+        Exclude: 
+          - provider.role
+          - provider.environment.ENV1
+          - functions.func3
+        Set:
+          provider.timeout: 90
+          provider.profile: dev
+        ElseExclude:
+          - provider.environment.ENV2
+        ElseSet:
+           provider.timeout: 120
+
+      - ExcludeIf: 
+           functions.func1: '"${self:provider.region}" == "ap-southeast-2"'
+           functions.func2: '"${opt:region}" == "us-east-1"'
+
+      - If: '"${self:provider.region}" == "us-east-1"'
+        Exclude: 
+          - functions.func1
+        Set:
+          provider.timeout: 300
+
+
+plugins:
+  - serverless-plugin-ifelse
+  
+provider:
+  name: aws
+  runtime: nodejs8.10
+  stage: dev
+  region : ap-southeast-2
+  timeout: 60
+  environment:
+    ENV1: env-val-1
+    ENV2: env-val-2 
+  profile: default
+  iamRoleStatements:
+    - Effect: Allow
+      Action:
+      - s3:*
+      Resource: "*"
+  role: arn:aws:iam::xxxxxxxxxxxx:role/testRole       
+ 
+functions:
+  func1:
+    name: Function 1
+    handler: lambda.func1
+    events:
+      - http: 
+           path: "path1",
+           method: "post",
+  func2:
+    name: Function 2
+    handler: lambda.func2
+    events:
+      - http: 
+           path: "path2",
+           method: "post",
+
+  func3:
+    name: Function 3
+    handler: lambda.func2
+    events:
+      - http: 
+           path: "path3",
+           method: "post" 
+```
+
+Put your conditions in custom variable ```serverlessIfElse```.
+
+## - If
+ Write your if condition inside single quote ```''```. Inside your condition, all your variables that resolve in string or the string themselves should be inside double quote. The plugin will otherwise encounter undefined variable error and the condition will not work. The condition can be anything, like == , !=, <, > or even javascript regular expressions. 
+
+```- If: '"${self:provider.stage}" == "dev"'```
+
+### Exclude 
+    If condition in If is true, all attibutes in Exclude will be ignored before serverless package or deploy your stack and hence serverless will not see those attributes.
+
+### Set 
+     If condition in If is true, the value of the attribute will be updated with new value.
+
+### ElseExclude 
+     If condition in If is false,the attibutes will be ignored.
+
+### ElseSet 
+     If condition in If is false, the value of the attribute will be updated with new value.
+
+## - ExcludeIf
+    Use ExcludeIf, if you want to write conditions per attribute. If condition is true, only that attribute will be ignored.
+
+You can write as many conditions as you like and exclude or set attributes any level deep in the yml file.
+
+## Note
+   This plugin will ignore or update value of attributes based on your conditions and does not evaluate if it causes any side effects. You are responsbile to make sure ignoring or setting new values will work as you expected and will not cause serverless to throw error. 
+
+   The plugin will not remove or update any first level attributes in serverless.yml file  like ```service``` or ```provider``` or ```functions```.

__tests__/index.test.js

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+const serverlessPluginIfElse = require("../index");
+let serverless = {};
+
+describe("Test Serverless IfElse Plugin With Condition Set 1", () => {
+    beforeAll(() => {
+        const condition = getConditions("condition1");
+        serverless = getServerless();
+        serverless.service.custom.serverlessIfElse = condition;
+        const serverlessIfElse = new serverlessPluginIfElse(serverless);
+        serverlessIfElse.applyConditions();
+    });
+
+    it("It Should Remove Serverless Properties in Exlude when If condition Matches", () => {
+        expect(serverless.service.functions.func1).toBeUndefined();
+        expect(serverless.service.functions.role).toBeUndefined();
+    });
+
+    it("It Should Set Serverless Properties in Set When If condition Matches", () => {
+        expect(serverless.service.provider.profile).toBe("dev");
+    });
+
+    it("It Should Not Remove Serverless Properties in ElseExclude condition when If condition Matches", () => {
+        expect(serverless.service.functions.func2).toBeDefined();
+        expect(serverless.service.functions.func2.name).toBe("Function 2");
+        expect(serverless.service.provider.iamRoleStatements).toBeDefined();
+    });
+
+    it("It Should Not Set Serverless Properties in ElseSet when If condition Matches", () => {
+        expect(serverless.service.provider.timeout).toBe(300);
+    });
+
+    it("It Should Not Remove Serverless Properties in ExcludeIf when condition Does not Match", () => {
+        expect(serverless.service.functions.func3).toBeDefined();
+        expect(serverless.service.functions.func3.name).toBe("Function 3");
+    });
+});
+
+
+describe("Test Serverless IfElse Plugin With Condition Set 2", () => {
+    beforeAll(() => {
+        const condition = getConditions("condition2");
+        serverless = getServerless();
+        serverless.service.custom.serverlessIfElse = condition;
+        const serverlessIfElse = new serverlessPluginIfElse(serverless);
+        serverlessIfElse.applyConditions();
+    });
+
+    it("It Should Not Remove Serverless Properties in Exlude when If condition Does Not Match", () => {
+        expect(serverless.service.functions.func1).toBeDefined();
+        expect(serverless.service.functions.func1.name).toBe("Function 1");
+    });
+
+    it("It Should Not Set Serverless Properties in Set When If condition Does Not Match", () => {
+        expect(serverless.service.provider.profile).toBe("default");
+    });
+
+    it("It Should Remove Serverless Properties in ElseExclude when If condition Does Not Match", () => {
+        expect(serverless.service.functions.func2).toBeUndefined();
+        expect(serverless.service.provider.iamRoleStatements).toBeUndefined();
+    });
+
+    it("It Should Set Serverless Properties in ElseSet when If condition Does Not Match", () => {
+        expect(serverless.service.provider.timeout).toBe(90);
+    });
+
+    it("It Should Remove Serverless Properties in ExcludeIf when condition Matches", () => {
+        expect(serverless.service.functions.func3).toBeUndefined();
+    });
+});
+
+const getServerless = function () {
+    return {
+        service: {
+            service: "Serverless Condition",
+            custom: {
+                serverlessExclude: []
+            },
+            provider: {
+                name: "aws",
+                runtime: "nodejs6.10",
+                timeout: 300,
+                stage: "dev",
+                profile: "default",
+                role: "arn:aws:iam::xxxxxxxxxxxx:role/Test",
+                iamRoleStatements: [{
+                    Effect: "Allow",
+                    Action: ["s3:*"],
+                    Resource: "*"
+                }]
+            },
+            functions: {
+                func1:
+                {
+                    name: "Function 1",
+                    handler: "func1.handler",
+                    events: [{
+                        http: {
+                            path: "path1",
+                            method: "post",
+                            private: true,
+                            cors: true
+                        }
+                    }
+                    ],
+                },
+                func2:
+                {
+                    name: "Function 2",
+                    handler: "func2.handler",
+                    events: [{
+                        http: {
+                            path: "path2",
+                            method: "post",
+                            private: true,
+                            cors: true
+                        }
+                    }
+                    ],
+                },
+                func3:
+                {
+                    name: "Function 3",
+                    handler: "func3.handler",
+                    events: [{
+                        http: {
+                            path: "path3",
+                            method: "post",
+                            private: true,
+                            cors: true
+                        }
+                    }
+                    ],
+                }
+            }
+        },
+        cli: {
+            log: jest.fn()
+        }
+    };
+};
+
+const getConditions = function (condition) {
+    const conditions = {
+        condition1: [
+            {
+                If: '"true"=="true"',
+                Exclude: [
+                    "functions.func1",
+                    "provider.role"
+                ],
+                Set: {
+                    "provider.profile": "dev",
+                },
+                ElseExclude: [
+                    "functions.func2",
+                    "provider.iamRoleStatements"
+                ],
+                ElseSet: {
+                    "provider.stage": "production",
+                    "provider.timeout": 90
+                }
+            },
+            {
+                ExcludeIf:
+                {
+                    "functions.func3": '"true" == "false"',
+                }
+            }
+        ],
+        condition2: [
+            {
+                If: '"true"=="false"',
+                Exclude: [
+                    "functions.func1",
+                ],
+                Set: {
+                    "provider.profile": "production",
+                    "provider.timeout": 60
+                },
+                ElseExclude: [
+                    "functions.func2",
+                    "provider.iamRoleStatements"
+                ],
+                ElseSet: {
+                    "provider.timeout": 90
+                }
+            },
+            {
+                ExcludeIf:
+                {
+                    "functions.func3": '"true" == "true"',
+                }
+            }
+        ]
+    };
+    return conditions[condition];
+};