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Showing content from https://github.com/Viinyard/adventofcode-template below:

Viinyard/adventofcode-template: Java template project to get started with Advent of Code with automatic generation of code skeleton for each solution

• Java 21
• Maven 3.9.9

Clic on Use this template and clone the repository.

Then, build the project with the following command:

If you want to customize the project, and change the group id for example, you can change group id in the pom.xml file:

  <groupId>dev.vinyard.adventofcode</groupId>

If you do this you also need to change the package name in the BluePrinter environment.xml file to keep it working:

  <property key="PACKAGE">dev/vinyard/adventofcode</property>

All the generated files will be created in the new package.

To get the Advent of Cope scrapper plugin to work, you need to set up your session id :

You can set your session id in your environment variables:

1. Go to the Advent of Code website.
2. Connect to your account.
3. Open the developer tools of your browser.
4. Go to the Application tab.
5. In the Cookies section, you will find a cookie named session.
6. Copy the value of the cookie.

  export AOC_SESSION_ID=your_session_id

You have to go to the environment variables and add a new one with the name AOC_SESSION_ID and the value your_session_id.

Or you can set it in the BluePrinter environment.xml file:

  <property key="SESSION_ID">your_session_id</property>

Caution

Be careful not to share your session id with anyone, don't commit it in your repository.

1. Allow github action to create pull requests on your repository:

   • Go to your repository settings.
   • Go to the Actions tab.
   • Go to the General section.
   • Check the Workflow permissions checkbox.
     • Check Read and write permissions
     • Check Allow GitHub Actions to create and approve pull requests

2. Add your session_id in your secrets:

   • Go to your repository settings.
   • Go to the Secrets and variables tab.
   • Go to the Actions section.
   • Clic on New repository secret.
   • Add a new secret with the name AOC_SESSION_ID and the value your_session_id.

3. Create a Personal Access Token (PAT) for the workflow:

   • Fine-grained Personal Access Token (PAT) with contents: write and pull-requests: write scopes.
   • Go to your account settings.
   • Go to the Developer settings tab.
   • Go to the Personal access tokens section.
   • Go to the Fine-grained token section.
   • Create a new token with the contents: write and pull-requests: write scopes and copy the token.
   • Go to your repository settings.
   • Go to the Secrets and variables tab.
   • Go to the Actions section.
   • Clic on New repository secret.
   • Add a new secret with the name PAT and the value your_personal_access_token.

That's it, you are ready to generate your solutions with Github Actions. Solutions will be generated in a brand new branch and a pull request will be created.

To generate the next solution of the year for Advent of Code, run the following command:

  mvn blueprinter:blueprint@next-solution 

To generate a specific solution for Advent of Code, run the following command:

  mvn blueprinter:blueprint@solution -Dyear=2023 -Dday=1 -Dpart=1

Important

To generate a new pull request with the solution, you need to have your GitHub environment set up

1. On your repository, go to the Actions tab.
2. Go to the All workflows section.

You will see 3 workflows:

• Generate antlr4 based Solution of the Day : This workflow generates the solution for today's day.
• Generate Next antlr4 based Solution : This workflow generates the next unimplemented solution of the year. If you haven't implemented any solution yet, it will generate the first one.
• Maven Build : This workflow builds the project, generates the README.md file, and pushes the changes to the repository.

Once you have generated the solution, you can implement the code in the generated files.

1. You can find the antlr4 grammar in the src/main/antlr4 directory.
2. You can find the solution in the src/main/java directory
   • You have one ASD file for the antlr4 grammar for the day
   • And one solution file for each part of the day.
3. Go to the src/test/java directory to initialize the first test result.
4. The first test from the test.txt is not automatically generated, you need to copy it from the Advent of Code website and paste it in the second argument of the testSolution method in the test file.
5. You can run the tests, and begin to implement the solution until all tests pass.
6. Once the first test passes, you can try to paste the result of the second test as your puzzle answer in the advent of code website.
7. Don't forget to paste it in the expected result of the second test in the test file.
8. Now you can refactor your code to make it more efficient, and run the tests to check if everything is still working.
9. Push your changes to your repository, and the workflow will generate the README.md file with the result of the tests and benchmarks.

Important

Automated generation of the README.md is disabled by default, because it erase the actual content of the README.md file. You can enable it by uncomment the on: section in the .github/workflows/build.yml file.

on: 
   pull_request:
   push:
     branches:
       - master

Tip

You can find a lot of examples of resolved solutions in my repository adventofcode.

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