Create Dockerfile

[msporshe]

first action

[github-learning-lab]

Nice work, you committed a Dockerfile. You'll notice at the end of the Dockerfile, we refer to an entrypoint script.

ENTRYPOINT ["/entrypoint.sh"]

The entrypoint.sh script will be run in Docker, and it will define what the action is really going to be doing.

Step 2: Add an entrypoint script

An entrypoint script must exist in our repository so that Docker has something to execute.

⌨️ Activity: Add an entrypoint script and commit it to your branch

1. As a part of this branch and pull request, create a file in the /action-a/ directory titled entrypoint.sh. You can do so with this quicklink

2. Add the following content to the entrypoint.sh file:

   #!/bin/sh -l
   
   sh -c "echo Hello world my name is $INPUT_MY_NAME"

3. Stage and commit the changes

4. Push the changes to GitHub

---

I'll respond when I detect a new commit on this branch.

[github-learning-lab]

Nice work adding the entrypoint.sh script.

In entrypoint.sh, all we're doing is outputting a "Hello world" message using an environment variable called MY_NAME.

Next, we'll define the action.yml file which contains the metadata for our action.

action.yml

All actions require a metadata file that uses YAML syntax. The data in the metadata file defines the inputs, outputs and main entrypoint for your action.

Step 3: Add an action metadata file

We will use an input parameter to read in the value of MY_NAME.

⌨️ Activity: Create action.yml

1. As a part of this branch and pull request, create a file titled action-a/action.yml. You can do so using this quicklink or manually.

2. Add the following content to the action.yml file:

   name: "Hello Actions"
   description: "Greet someone"
   author: "octocat@github.com"
   
   inputs:
     MY_NAME:
       description: "Who to greet"
       required: true
       default: "World"
   
   runs:
     using: "docker"
     image: "Dockerfile"
   
   branding:
     icon: "mic"
     color: "purple"

3. Stage and commit the changes

4. Push the changes to GitHub

---

I'll respond when I detect a new commit on this branch.