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ghost
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The Ghost Programming Language
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# The Ghost Programming Language [](https://github.com/ghost-language/ghost/actions/workflows/test.yml) Ghost is a small, object-oriented, embeddable toy scripting language. While object-oriented, Ghost also supports procedural and functional programming styles as well. Ghost is dynamically typed, runs by a tree-walking interpreter, and has automatic memory management thanks to its implementation through the Go programming language. ## Status > Currently in beta, vetting out the language and seeing how it feels writing/running. Major changes are still possible at this stage. ## Documentation You will find robust, user friendly, and updated documentation on our [website](https://ghostlang.org/docs). ## Versioning We use [SemVer](http://semver.org/) for versioning. For the versions available, see the [tags on this repository](https://github.com/ghost-language/ghost/tags). ## Installation ### Brew If you're on mac, you may use `homebrew`: ``` $ brew tap ghost-language/ghost $ brew install ghost-language/ghost/ghost ``` ### Go Install If you have Go installed, you may use `go install`: ``` go install ghostlang.org/x/ghost ``` ### Direct Download You may download the compiled binaries for your platform from our GitHub [releases](https://github.com/ghost-language/ghost/releases) page. ## Development - To build and execute Ghost, run `make`. - To build Ghost, run `make build`. - To execute tests, run `make test`. ``` $ git clone git@github.com:ghost-language/ghost.git $ cd ghost $ make Ghost (x.x) Press Ctrl + C to exit >> ``` ## CLI You can execute code written in Ghost in various ways using the CLI. ### REPL Ghost includes a simple REPL to write and execute Ghost code directly in your terminal. To enter the REPL environment, run `ghost` on its own: ``` $ ghost Ghost (x.x) Press Ctrl + C to exit >> ``` ### Executing Files To execute a Ghost source file (`.ghost`), pass either the relative or absolute path of the file to `ghost`. The source file will be executed and then exit back to the terminal. ``` $ ghost examples/fibtc.ghost 9227465 $ ``` ### Interactive Mode Interactive mode allows you to execute a Ghost source file, and then immediately jump into a REPL session with the state of the source file still intact. To enter interactive mode, pass the `-i` flag to `ghost`. ``` $ ghost -i examples/fibtc.ghost (executed in: 350.374µs) >> x 9227465 >> ``` ## Releasing Ghost is hosted and distributed through GitHub. We utilize [GoReleaser](https://goreleaser.com) to automate the release process. GoReleaser will build all the necessary binaries, publish the release and publish the brew tap formula. The following steps outline the process for maintainers of Ghost: 1. Ensure you have a GitHub token with `repo` access saved to your environment: ``` export GITHUB_TOKEN="YOUR_GH_TOKEN" ``` 2. Ensure the internal version reference is updated: ```go // version/version.go var ( Version = "x.y.z" ) ``` 3. Create a new tag: ``` $ git tag -a vx.y.z -m "Release description" $ git push origin vx.y.z ``` 4. Run GoReleaser: ``` $ goreleaser ``` ## Credits - [Crafting Interpreters](https://craftinginterpreters.com/) - [Writing An Interpreter In Go](https://interpreterbook.com/) ## License Ghost is open-sourced software licensed under the MIT license. See the [LICENSE](LICENSE) file for complete details.
