feat: support dockerLabels

README.md

@@ -50,6 +50,9 @@ input of the second:
         environment-variables: |
             LOG_LEVEL=info
             ENVIRONMENT=prod
+        docker-labels: |
+            SERVICE=service
+            VERSION=version
 
     - name: Modify Amazon ECS task definition with second container
       id: render-app-container

action.yml

@@ -22,6 +22,9 @@ inputs:
   log-configuration-options:
     description: "Create/Override options inside logConfiguration. Each variable is of the form key=value, you can specify multiple variables with multi-line YAML strings."
     required: false
+  docker-labels:
+    description: "Create/Override options inside dockerLabels. Each variable is key=value, you can specify multiple variables with multi-line YAML."
+    required: false
 outputs:
   task-definition:
     description: 'The path to the rendered task definition file'

dist/index.js

@@ -20,6 +20,7 @@ async function run() {
 
     const logConfigurationLogDriver = core.getInput("log-configuration-log-driver", { required: false });
     const logConfigurationOptions = core.getInput("log-configuration-options", { required: false });
+    const dockerLabels = core.getInput('docker-labels', { required: false });
 
     // Parse the task definition
     const taskDefPath = path.isAbsolute(taskDefinitionFile) ?
@@ -103,6 +104,24 @@ async function run() {
       })
     }
 
+    if (dockerLabels) {
+      // If dockerLabels object is missing, create it
+      if (!containerDef.dockerLabels) { containerDef.dockerLabels = {} }
+
+      // Get pairs by splitting on newlines
+      dockerLabels.split('\n').forEach(function (label) {
+        // Trim whitespace
+        label = label.trim();
+        if (label && label.length) {
+          if (label.indexOf("=") == -1 ) {
+            throw new Error(`Can't parse logConfiguration option ${label}. Must be in key=value format, one per line`);
+          }
+          const [key, value] = label.split("=");
+          containerDef.dockerLabels[key] = value;
+        }
+      })
+    }
+
     // Write out a new task definition file
     var updatedTaskDefFile = tmp.fileSync({
       tmpdir: process.env.RUNNER_TEMP,

index.js

@@ -14,6 +14,7 @@ async function run() {
 
     const logConfigurationLogDriver = core.getInput("log-configuration-log-driver", { required: false });
     const logConfigurationOptions = core.getInput("log-configuration-options", { required: false });
+    const dockerLabels = core.getInput('docker-labels', { required: false });
 
     // Parse the task definition
     const taskDefPath = path.isAbsolute(taskDefinitionFile) ?
@@ -97,6 +98,24 @@ async function run() {
       })
     }
 
+    if (dockerLabels) {
+      // If dockerLabels object is missing, create it
+      if (!containerDef.dockerLabels) { containerDef.dockerLabels = {} }
+
+      // Get pairs by splitting on newlines
+      dockerLabels.split('\n').forEach(function (label) {
+        // Trim whitespace
+        label = label.trim();
+        if (label && label.length) {
+          if (label.indexOf("=") == -1 ) {
+            throw new Error(`Can't parse logConfiguration option ${label}. Must be in key=value format, one per line`);
+          }
+          const [key, value] = label.split("=");
+          containerDef.dockerLabels[key] = value;
+        }
+      })
+    }
+
     // Write out a new task definition file
     var updatedTaskDefFile = tmp.fileSync({
       tmpdir: process.env.RUNNER_TEMP,

index.test.js

@@ -224,6 +224,105 @@ describe('Render task definition', () => {
         expect(core.setFailed).toBeCalledWith('Task definition file does not exist: does-not-exist-task-definition.json');
     });
 
+    test('renders a task definition with docker labels', async () => {
+        core.getInput = jest
+            .fn()
+            .mockReturnValueOnce('task-definition.json')
+            .mockReturnValueOnce('web')
+            .mockReturnValueOnce('nginx:latest')
+            .mockReturnValueOnce('EXAMPLE=here')
+            .mockReturnValueOnce('awslogs')
+            .mockReturnValueOnce('awslogs-create-group=true\nawslogs-group=/ecs/web\nawslogs-region=us-east-1\nawslogs-stream-prefix=ecs')
+            .mockReturnValueOnce('key1=value1\nkey2=value2');
+
+        await run();
+
+        expect(tmp.fileSync).toHaveBeenNthCalledWith(1, {
+            tmpdir: '/home/runner/work/_temp',
+            prefix: 'task-definition-',
+            postfix: '.json',
+            keep: true,
+            discardDescriptor: true
+        });
+
+        expect(fs.writeFileSync).toHaveBeenNthCalledWith(1, 'new-task-def-file-name',
+            JSON.stringify({
+                family: 'task-def-family',
+                containerDefinitions: [
+                    {
+                        name: "web",
+                        image: "nginx:latest",
+                        environment: [
+                            {
+                                name: "FOO",
+                                value: "bar"
+                            },
+                            {
+                                name: "DONT-TOUCH",
+                                value: "me"
+                            },
+                            {
+                                name: "HELLO",
+                                value: "world"
+                            },
+                            {
+                                name: "EXAMPLE",
+                                value: "here"
+                            }
+                        ],
+                        logConfiguration: {
+                            logDriver: "awslogs",
+                            options: {
+                                "awslogs-create-group": "true",
+                                "awslogs-group": "/ecs/web",
+                                "awslogs-region": "us-east-1",
+                                "awslogs-stream-prefix": "ecs"
+                            }
+                        },
+                        dockerLabels : {
+                            "key1":"value1",
+                            "key2":"value2"
+                        }
+                    },
+                    {
+                        name: "sidecar",
+                        image: "hello"
+                    }
+                ]
+            }, null, 2)
+        );
+    });
+
+    test('renders a task definition at an absolute path with bad docker labels', async () => {
+        core.getInput = jest
+            .fn()
+            .mockReturnValueOnce('/hello/task-definition.json')
+            .mockReturnValueOnce('web')
+            .mockReturnValueOnce('nginx:latest')
+            .mockReturnValueOnce('EXAMPLE=here')
+            .mockReturnValueOnce('awslogs')
+            .mockReturnValueOnce('awslogs-create-group=true\nawslogs-group=/ecs/web\nawslogs-region=us-east-1\nawslogs-stream-prefix=ecs')
+            .mockReturnValueOnce('key1=update_value1\nkey2\nkey3=value3');
+
+        jest.mock('/hello/task-definition.json', () => ({
+            family: 'task-def-family',
+            containerDefinitions: [
+                {
+                    name: "web",
+                    image: "some-other-image",
+                    dockerLabels : {
+                        "key1":"value1",
+                        "key2":"value2"
+                    }
+                }
+            ]
+        }), { virtual: true });
+
+        await run();
+
+        expect(core.setFailed).toBeCalledWith('Can\'t parse logConfiguration option key2. Must be in key=value format, one per line');
+    });
+
     test('error returned for non-JSON task definition contents', async () => {
         jest.mock('./non-json-task-definition.json', () => ("hello"), { virtual: true });