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FRC-Robot

This is the incubating software framework for ILITE's 2019 season.

Credits

  • Team 254 for their 2018 robot code, which can be found here. We make heavy use of com.team254.lib, as well as extended versions of their motion planning and odometry code.
  • Jaci for GradleRIO, as well as the GNUPlot integration
  • Jesse for the highfrequencyrobots project, which allows us to define data structures for robot telemetry as well as internal use.
  • Team 1678 for their excellent README section on contributing code with Git, which can be found here

Project Structure

The project consists of three subprojects: robot, display, and common. By separating code into subprojects, we can ensure that robot doesn't accidentally call JavaFX libraries from the display project, and vice-versa. Instead, we allow the robot and display packages to both use code in the common package

Robot

The robot subproject contains code running on the actual robot.

com.team254.lib - Contains hardware drivers and utilities from 254.
us.ilite.lib - Contains hardware drivers and utilites we've written from year-to-year.
us.ilite.robot - Parent package for all robot code
    commands - Contains autonomous commands
    driverinput - Contains the base class handling driver input and any additional control schemes
    hardware - Contains hardware classes that allow modules to interface with hardware
    loops - Contains high-frequency loops running on the robot
    modules - Contains the modules that control subsystems on the robot

Common

The common subproject contains code shared by the robot and display subprojects, such as common data structures + more.

com.team254.lib - Contains math, modeling, and utility classes from 254
us.ilite.common.config - Contains constants, etc.
us.ilite.common.io - Contains extensions of the highfrequencyrobots framework that rely on NetworkTables
us.ilite.lib - Contains utilities, etc. we use from year-to-year
us.ilite.common.types - Contains enumerations defining common data structures to be used throughout other subprojects

Display

The display subproject contains the code for running the driver's display, autonomous selection, and logging software.

logging - Contains logging code
display - Contains display code

VSCode and the WPILib Dev Environment

You can find the instructions here.

Extensions

You'll need the following extensions:

Mandatory

  • VS Live Share - Edit code together in real-time, or review code with a bunch of people.
  • Gradle Language Support - Provides language support for Gradle. Lets us better edit gradle files.

Optional

  • Git Project Manager - Once configured, lets you open projects by selecting from a list of Git projects on your computer.
  • Gnuplot - GNUPlot language support. Useful for viewing logs.
  • Keybindings from your favorite Java editor (Eclipse, IntelliJ, etc.)
  • Path Intellisense - Autocomplete file paths
  • A nice-looking theme

Setting up the JDK

You should've already set the location of your JDK installation in the above tutorial. If you need to set it again, here are the instructions.

  1. Navigate to File -> Preferences -> Settings
  2. Search for "jdk" in the search bar
  3. Click Java Configuration on the left-hand sidebar. The only setting visible should be Java: Home
  4. Click on Edit in settings.json
  5. The right-hand side stores any settings made by the user. Add a line like this at the end of the file: "java.home": "/Path/To/JDK/Installation"
    • If you don't know where your JDK installation is, it's probably in C:\Users\<Your Username>\frc2019\jdk.
  6. You're done! Wait a bit for the Java Language Server to start up and recognize your project (you should see a little spinning icon at the bottom left of your screen), then test it out by clicking on a variable type (like Module or Drive or Double) and pressing F12. If all goes well, you should be taken to the definition of that class.

Opening Projects

It's pretty easy. File -> Open Folder..., then navigate to the repository you have cloned (The folder named FRC-Robot-YYYY).

Want to learn more?

Code Navigation

Basic Editing

Building and Deploying

  • Run these commands from Git Bash
  • To build, run ./gradlew build
  • To deploy to the robot, run ./gradlew deploy
    • Remember to build before you deploy
  • To do both at once, run ./gradlew build deploy

Contributing

Here's how to get your code into the main robot repository:

If you've just joined the team:

  1. Make an account on GitHub.
  2. Ask one of the robot programming leads to add your account to the iliterobotics robot programming team.

If it's the first time you've contributed to this repo:

  1. Clone the repo to your computer - git clone https://github.com/iliterobotics/FRC-Robot-2019

Any time you want to make a change:

  1. Create and checkout a new branch.
  • git checkout -b <your_branch_name>, where <your_branch_name> is a descriptive name for your branch. For example fix-shooter-wheel, two-ball-auto, or climbing. Use dashes in the branch name, not underscores.
  1. Make whatever code changes you want/need/ to make. Be sure to write tests for your changes!
  2. Commit your work locally.
  • Try to make your commits as atomic (small) as possible. For example, moving functions around should be different from adding features, and changes to one subsystem should be in a different commit than changes to another subsystem.
  • Follow these conventions for commit messages. Or else.
  • If your change is anything more than a few lines or small fixes, don't skip the extended description. If you are always using git commit with the -m option, stop doing that.
  1. Push to your branch.
  • git push origin <your_branch_name>.
  1. Submit a pull request.
  2. Log into Github.
  3. Go to the page for your forked repo.
  4. Select the branch that you just pushed from the "Branch" dropdown menu.
  5. Click "New Pull Request".
  6. Review the changes that you made.
  7. If you are happy with your changes, click "Create Pull Request".
  8. Wait
  • People must review (and approve of) your changes before they are merged - master is locked to any pull requests that don't have at least 2 reviews.
    • Specifically, the rules are that one of the following two conditions must be true for it to get merged:
      1. 1 mentor and 1 other person have approved
      2. 2 experienced students and one other person have approved
  • If there are any concerns about your pull request, fix them. Depending on how severe the concerns are, the pull request may be merged without it, but everyone will be happier if you fix your code. To update your PR, just push to the branch you made before.
  • Don't dismiss someone's review when you make changes - instead, ask them to re-review it.
  1. Merge your changes into master
  • If there are no conflicts, push the "Squash and merge" button, write a good commit message, and merge the changes.
  • If there are conflicts, fix them locally on your branch, push them, wait for Jenkins to pass, and then squash and merge.
  1. ???
  2. Profit

Helpful Tips

VSCode Trouble?

If you're having trouble with IntelliJ, run ./gradlew clean build. This deletes any compiled Java files and rebuilds the project.

Tools

You can run any of these with ./gradlew <insert-tool-name-here>

Shuffleboard

  • Lets you view values posted to NetworkTables and put them into widgets
  • Make sure the server address is set the correct address (File -> Preferences -> NetworkTables)

RIOLog

  • View console output from the RoboRIO in your terminal
  • You can also see this from the driver station

OutlineViewer

  • Like ShuffleBoard, but you can only view raw values and can't set values. Useful for fast debugging. Lets you run a NetworkTables server locally without extra code or a robot.

Other remotes

You can add "remotes" to github that refer to other people's robot code repos. This allows you to, for example, take a look at someone else's code to look over it, you would be able to git checkout wesley/branch-that-breaks-everything to see it. To add a remote, just do git remote add <name_of_person> https://github.com/<username>/robot-code. Once you've done this, you can use git fetch <name_of_person> to get updated code from other people's repos!

Static Code analyisis

Currently PMD is added to all of the sub projects in the root project's build.gradle, located at ./build.gradle. The PMD plugin is applied to all sub projects.

What is PMD

PMD is a static code analyizer. Documentation is located at: PMD

How to run

From the root project run:

./gradlew clean check

##Ignore Failures By default, running PMD will cause the gradle task to fail if any errors are found. To turn that off, in the pmd block of the root project's build.gradle should be set to:

pmd {
   ignoreFailures = false
}

##Results Location The results are located in the build directory in each of the sub projects: ./common/build/reports/pmd/main.html ./display/build/reports/pmd/main/html ./robot/build/reports/pmd/main/html

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