scry

# Scry

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![Scry logo](https://i.imgur.com/ticTfT8.png)

Scry is a code analysis server for [Crystal](http://crystal-lang.org).
It is an implementation of a [common language protocol](https://code.visualstudio.com/blogs/2016/06/27/common-language-protocol).
It is being built as a server for VSCode, but is compatible with any
client that implements this [protocol](https://microsoft.github.io/language-server-protocol).

The server is implemented in Crystal.

## Installation

To install Scry download it from the [releases page](https://github.com/crystal-lang-tools/scry/releases) or compile the latest version using:

> **Note:** Crystal is required in order to compile Scry.

```bash
git clone https://github.com/crystal-lang-tools/scry.git
cd scry
shards build --verbose --release
```

Then, set your LSP client's `scry` binary path to point to `scry/bin/scry`.

## Known issues

- Completion feature is still experimental.
- Unexpected diagnostics can appear on files using implicit `require`, try using explicit `require` at top of your files.
- Go to definition only works for some methods and variables. Go to classes or macros definition is not supported yet.
- Symbol listing works per file, searching for workspace symbols is not supported yet.

## Roadmap

Ongoing, in [our](https://github.com/kofno/scry#contributors) free time.

The goal is to implement all of the currently supported Language Server features.

- [Completion](https://microsoft.github.io/language-server-protocol/specification#textDocument_completion) **(WIP)**: compute completion items at a given cursor position.
- [Diagnostics](https://microsoft.github.io/language-server-protocol/specification#textDocument_publishDiagnostics) **(WIP)**: provides problem detection for text document.
- [Document Formatting](https://microsoft.github.io/language-server-protocol/specification#textDocument_formatting) **(WIP)**: this includes formatting of whole documents, document ranges and formatting on type.
- [Goto Definition](https://microsoft.github.io/language-server-protocol/specification#textDocument_definition): **(WIP)** provides go to definition support for a symbol selected in a text document.
- [Document Highlights](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentHighlight): highlights all 'equal' symbols in a text document.
- [Hover](https://microsoft.github.io/language-server-protocol/specification#textDocument_hover): provides hover information for a symbol selected in a text document.
- [Signature Help](https://microsoft.github.io/language-server-protocol/specification#textDocument_signatureHelp): provides signature help for a symbol selected in a text document.
- [Find References](https://microsoft.github.io/language-server-protocol/specification#textDocument_references): finds all project-wide references for a symbol selected in a text document.
- [List Document Symbols](https://microsoft.github.io/language-server-protocol/specification#textDocument_documentSymbol): **(WIP)** lists all symbols defined in a text document.
- [List Workspace Symbols](https://microsoft.github.io/language-server-protocol/specification#workspace_symbol): **(WIP)** lists all project-wide symbols.
- [Code Actions:](https://microsoft.github.io/language-server-protocol/specification#textDocument_codeAction) compute commands for a given text document and range.
- [CodeLens](https://microsoft.github.io/language-server-protocol/specification#textDocument_codeLens): compute CodeLens statistics for a given text document. (OK, maybe not this one)
- [rename](https://microsoft.github.io/language-server-protocol/specification#textDocument_rename): project-wide rename of a symbol.

## Contributing

1. Fork it <https://github.com/crystal-lang-tools/scry/fork>
2. Create your feature branch `git checkout -b my-new-feature`
3. Commit your changes `git commit -am 'Add some feature'`
4. Push to the branch `git push origin my-new-feature`
5. Create a new Pull Request

## Contributors

- [@kofno](https://github.com/kofno) Ryan L. Bell - creator, maintainer
- [@keplersj](https://github.com/keplersj) Kepler Sticka-Jones - contributor
- [@faustinoaq](https://github.com/faustinoaq) Faustino Aguilar - contributor
- [@laginha87](https://github.com/laginha87) Filipe Correia - contributor
- [@bmulvihill](https://github.com/bmulvihill) Bryan Mulvihill - contributor

[See all of Scry's contributors](https://github.com/crystal-lang-tools/scry/graphs/contributors)