feat(plugin): Add ability to push multiple docker images

.dockerignore

@@ -0,0 +1 @@
+**

.gitignore

@@ -10,3 +10,5 @@ dist
 coverage
 
 *.log
+
+develop.ts

.vscode/launch.json

@@ -14,9 +14,12 @@
       "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
       "args": [
         "src/**/*.spec.ts",
-        "-r", "chai",
-        "-r", "chai-as-promised",
-        "-r", "ts-node/register"
+        "-r",
+        "chai",
+        "-r",
+        "chai-as-promised",
+        "-r",
+        "ts-node/register"
       ],
       "sourceMaps": true
     },
@@ -28,6 +31,22 @@
       "outFiles": [
         "${workspaceFolder}/**/*.js"
       ]
+    },
+    {
+      "name": "Debug",
+      "type": "node",
+      "request": "launch",
+      "args": [
+        "${workspaceRoot}/develop.ts"
+      ],
+      "runtimeArgs": [
+        "--nolazy",
+        "-r",
+        "ts-node/register"
+      ],
+      "sourceMaps": true,
+      "cwd": "${workspaceRoot}",
+      "protocol": "inspector"
     }
   ]
-}
+}

Dockerfile

@@ -0,0 +1,2 @@
+FROM scratch
+ARG TEST

README.md

@@ -7,25 +7,6 @@
 
 A [semantic-release](https://github.com/semantic-release/semantic-release) plugin to use semantic versioning for docker images.
 
-## Supported Steps
-
-### verifyConditions
-
-verifies that environment variables for authentication via username and password are set.
-It uses a registry server provided via config or environment variable (preferred) or defaults to docker hub if none is given.
-It also verifies that the credentials are correct by logging in to the given registry.
-
-### prepare
-
-tags the specified image with the version number determined by semantic-release and additional tags provided in the configuration.
-In addition it supports specifying a complete image name (CIN) via configuration settings according to the canonical format specified by docker:
-
-`[registryhostname[:port]/][username/]imagename[:tag]`
-
-### publish
-
-pushes the tagged images to the registry.
-
 ## Installation
 
 Run `npm i --save-dev @iteratec/semantic-release-docker` to install this semantic-release plugin.
@@ -36,46 +17,37 @@ Run `npm i --save-dev @iteratec/semantic-release-docker` to install this semanti
 
 The `docker registry` authentication is **required** and can be set via environment variables.
 
-### Environment variables
-
 | Variable                 | Description                                                                               |
 | ------------------------ | ----------------------------------------------------------------------------------------- |
 | DOCKER_REGISTRY_URL      | The hostname and port used by the desired docker registry. Leave blank to use docker hub. |
 | DOCKER_REGISTRY_USER     | The user name to authenticate with at the registry.                                       |
 | DOCKER_REGISTRY_PASSWORD | The password used for authentication at the registry.                                     |
 
-### Options
+### Plugin Configuration
 
-| Option         | Description                                                                                                                                 |
-| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
-| additionalTags | _Optional_. An array of strings allowing to specify additional tags to apply to the image.                                                  |
-| imageName      | **_Required_** The name of the image to release.                                                                                            |
-| registryUrl    | _Optional_. The hostname and port used by the the registry in format `hostname[:port]`. Omit the port if the registry uses the default port |
-| repositoryName | _Optional_. The name of the repository in the registry, e.g. username on docker hub                                                         |
-
-## Usage
-
-full configuration:
+#### Full configuration
 
 ```json
 {
   "verifyConfig": ["@iteratec/semantic-release-docker"],
-  "prepare": {
-    "path": "@iteratec/semantic-release-docker",
-    "additionalTags": ["test", "demo"],
-    "imageName": "my-image",
-    "registryUrl": "my-private-registry:5678",
-    "respositoryName": "my-repository"
-  },
+  "prepare": [
+    {
+      "path": "@iteratec/semantic-release-docker",
+      "additionalTags": ["test", "demo"],
+      "imageName": "my-image",
+      "registryUrl": "my-private-registry:5678",
+      "respositoryName": "my-repository"
+    }
+  ],
   "publish": {
     "path": "@iteratec/semantic-release-docker"
   }
 }
 ```
 
-results in `my-private-registry:5678/my-repository/my-image` with tags `test`, `demo` and the `<semver>` determined by `semantic-release`.
+Results in `my-private-registry:5678/my-repository/my-image` with tags `test`, `demo` and the `<semver>` determined by `semantic-release`.
 
-minimum configuration:
+#### Minimum configuration
 
 ```json
 {
@@ -90,4 +62,95 @@ minimum configuration:
 }
 ```
 
-results in `my-image:<semver>`
+Results in `my-image:<semver>`.
+
+### Options
+
+| Option         | Description                                                                                                                                 |
+| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
+| additionalTags | _Optional_. An array of strings allowing to specify additional tags to apply to the image.                                                  |
+| imageName      | **_Required_** The name of the image to release.                                                                                            |
+| registryUrl    | _Optional_. The hostname and port used by the the registry in format `hostname[:port]`. Omit the port if the registry uses the default port |
+| repositoryName | _Optional_. The name of the repository in the registry, e.g. username on docker hub                                                         |
+
+## Steps
+
+### verifyConditions
+
+It uses a registry server provided via config or environment variable (preferred) or defaults to docker hub if none is given.
+
+1. Verifies that environment variables for authentication via username and password are set.
+2. It also verifies that the credentials are correct by logging in to the given registry.
+
+### prepare
+
+Tags the specified image with the version number determined by semantic-release and additional tags provided in the configuration.
+In addition it supports specifying a complete image name (CIN) via configuration settings according to the canonical format specified by docker:
+
+`[registryhostname[:port]/][username/]imagename[:tag]`
+
+### publish
+
+Pushes the tagged images to the registry.
+
+## Contribute
+
+### Develop
+
+1. Create a develop.ts file in the root of this Git-Repository and copy this:
+
+    ```typescript
+    import { SemanticReleaseConfig, SemanticReleaseContext } from 'semantic-release';
+    import { prepare, publish, verifyConditions } from './src';
+    import { DockerPluginConfig } from './src/models';
+
+    process.env.DOCKER_REGISTRY_USER = '<Your Docker Registry User>';
+    process.env.DOCKER_REGISTRY_PASSWORD = '<Your Docker Registry Password>';
+
+    const config: SemanticReleaseConfig = {
+      branch: '',
+      noCi: true,
+      repositoryUrl: '',
+      tagFormat: ''
+    };
+    const context: SemanticReleaseContext = {
+      logger: {
+        // tslint:disable-next-line:no-empty
+        log: (message: string) => {}
+      },
+      options: {
+        branch: '',
+        noCi: true,
+        prepare: [
+          {
+            additionalTags: ['latest'],
+            imageName: 'testimage',
+            repositoryName: '<your test repository>',
+            path: '@iteratec/semantic-release-docker'
+          } as DockerPluginConfig,
+          {
+            additionalTags: ['latest'],
+            imageName: 'testimage1',
+            repositoryName: '<your test repository>',
+            path: '@iteratec/semantic-release-docker'
+          } as DockerPluginConfig
+        ],
+        repositoryUrl: '',
+        tagFormat: ''
+      },
+      nextRelease: {
+        version: '1.0.3',
+        gitHead: '45jh345g',
+        gitTag: 'v1.0.3',
+        notes: 'Nothing special'
+      }
+    };
+    context.logger.log = (string: string) => {
+      console.log(string);
+    };
+    verifyConditions(config, context);
+    prepare(config, context);
+    publish(config, context);
+    ```
+
+2. Simply run the "Debug" configuration in the Debug VS Code Tab.

azure-pipelines.yml

@@ -5,18 +5,23 @@ jobs:
       demands: npm
     steps:
       - task: NodeTool@0
-        displayName: "Use Node 10"
+        displayName: 'Use Node 10'
         inputs:
           versionSpec: 10.x
       - task: Npm@1
-        displayName: "Install dependencies"
+        displayName: 'Install dependencies'
         inputs:
           verbose: false
       - task: Npm@1
         displayName: Build
         inputs:
           command: custom
           customCommand: run build
+      - task: Npm@1
+        displayName: End2End Test
+        inputs:
+          command: custom
+          customCommand: run e2e
       - task: Npm@1
         displayName: Test
         inputs: