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Subtree of the main antlr4 projects's runtime/Swift directory that can directly be used as a Swift package.
.package(url: "https://github.com/hexdreamer/antlr4-swift-package.git", from: "4.8.0")


This repository exists basically as a fork of the main repo: https://github.com/antlr/antlr4.git. Xcode can only use an entire repository as an included Swift Package Manager package, so the one that exists in the subdirectory runtime/Swift will not work "out of the box". I'm hoping to get any changes in this directory pulled back up to the main repo.

Instructions for Making Your Own

We can't actually fork this repo off from the main repo directly and still be able to issue pull requests, etc., but we CAN fork the entire project, and then move a subdirectory of it to a new project. Then we can have a clone on our desktop that is attached to both the full fork and the subdirectory fork. The full fork can be pull-requested back into the main project, and the subdirectory fork can be directly used by SPM enabled projects. Sigh.

StackOverflow to the rescue: https://stackoverflow.com/questions/29306032/fork-subdirectory-of-repo-as-a-different-repo-in-github

  • Clone the repo
$ git clone https://github.com/hexdreamer/antlr4.git
  • Create a branch using the git subtree command for the folder only
$ git subtree split --prefix=runtime/Swift -b antlr4-swift-package
$ git remote add upstream-antlr4-swift-package https://github.com/hexdreamer/antlr4-swift-package.git
  • Push the subtree
$ git push upstream-antlr4-swift-package antlr4-swift-package

Updating This Project From The Main Repository

Sync our fork of Antlr4 from the upstream main repo

  • check out fresh version of hexdreamer/antlr4
$ git clone git@github.com:hexdreamer/antlr4.git
$ cd antlr4
$ git remote add upstream https://github.com/antlr/antlr4
$ git fetch upstream
$ git merge upstream/main
  • perform a new split on the repo
$ git subtree split --prefix=runtime/Swift -b antlr4-swift-package

Sync this repo with the upstream we just created

  • check out the existing anltr4-swift-package
$ cd ..
$ git clone git@github.com:hexdreamer/antlr4-swift-package.git
  • do a similar upstream merge with antlr4-swift-package
$ cd antlr4-swift-package
$ git remote add upstream ../antlr4
$ git fetch upstream
$ git merge upstream/antlr4-swift-package

Build Notes

In order to build the tests, you need to mvn install the code from the main repo. The full suite of tests aren't working for me, and end up filling my disk, so I skip them. You also need to have JAVA_HOME defined, which is now in a weird place on the latest macOS. Your location may vary.

export JAVA_HOME
mvn install -DskipTests


Stars: 1
Last commit: 22 weeks ago

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iOS Software Engineer @ Perry Street Software
Perry Street Software is Jack’d and SCRUFF. We are two of the world’s largest gay, bi, trans and queer social dating apps on iOS and Android. Our brands reach more than 20 million members worldwide so members can connect, meet and express themselves on a platform that prioritizes privacy and security. We invest heavily into SwiftUI and using Swift Packages to modularize the codebase.

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