224 lines
6.1 KiB
Markdown
224 lines
6.1 KiB
Markdown
<div align="center">
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<p>
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<img width="80" src="https://raw.githubusercontent.com/donnisnoni95/v-logo/master/dist/v-logo.svg?sanitize=true">
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</p>
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<h1>The V Programming Language</h1>
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[vlang.io](https://vlang.io) |
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[Docs](https://github.com/vlang/v/blob/master/doc/docs.md) |
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[Changelog](https://github.com/vlang/v/blob/master/CHANGELOG.md) |
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[Speed](https://fast.vlang.io/) |
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[Contributing](https://github.com/vlang/v/blob/master/CONTRIBUTING.md)
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</div>
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<div align="center">
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[![Build Status][WorkflowBadge]][WorkflowUrl]
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[![Sponsor][SponsorBadge]][SponsorUrl]
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[![Patreon][PatreonBadge]][PatreonUrl]
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[![Discord][DiscordBadge]][DiscordUrl]
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[![Twitter][TwitterUrl]][TwitterBadge]
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</div>
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## Key Features of V
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- Simplicity: the language can be learned in less than an hour
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- Fast compilation: ≈100k — 1.2 million loc/s
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- Easy to develop: V compiles itself in less than a second
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- Performance: within 3% of C
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- Safety: no null, no globals, no undefined behavior, immutability by default
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- C to V translation
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- Hot code reloading
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- [Cross-platform UI library](https://github.com/vlang/ui)
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- Built-in graphics library
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- Easy cross compilation
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- REPL
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- Built-in ORM
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- C and JavaScript backends
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A stable 0.2 release is planned for June 2020. Right now V is in an alpha stage.
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## Installing V from source
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### Linux, macOS, Windows, *BSD, Solaris, WSL, Android, Raspbian
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```bash
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git clone https://github.com/vlang/v
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cd v
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make
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```
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That's it! Now you have a V executable at `[path to V repo]/v`.
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`[path to V repo]` can be anywhere.
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(On Windows `make` means running `make.bat`, so make sure you use `cmd.exe`)
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Now you can try `./v run examples/hello_world.v` (`v.exe` on Windows).
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V is being constantly updated. To update V, simply run:
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```
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v up
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```
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### C compiler
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You'll need Clang or GCC or Visual Studio. If you are doing development, you most likely already have one of those installed.
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Otherwise, follow these instructions:
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- [Installing a C compiler on Linux and macOS](https://github.com/vlang/v/wiki/Installing-a-C-compiler-on-Linux-and-macOS)
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- [Installing a C compiler on Windows](https://github.com/vlang/v/wiki/Installing-a-C-compiler-on-Windows)
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### Symlinking
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NB: it is *highly recommended*, that you put V on your PATH. That saves
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you the effort to type in the full path to your v executable everytime.
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V provides a convenience `v symlink` command to do that more easily.
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On Unix systems, it creates a `/usr/local/bin/v` symlink to your
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executable. To do that, run:
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```bash
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sudo ./v symlink
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```
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On Windows, start a new shell with administrative privileges, for
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example by <kbd>Windows Key</kbd>, then type `cmd.exe`, right click on its menu
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entry, and choose `Run as administrator`. In the new administrative
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shell, cd to the path, where you have compiled v.exe, then type:
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```bat
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.\v.exe symlink
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```
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That will make v available everywhere, by adding it to your PATH.
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Please restart your shell/editor after that, so that it can pick
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the new PATH variable.
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NB: there is no need to run `v symlink` more than once - v will
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continue to be available, even after `v up`, restarts and so on.
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You only need to run it again, if you decide to move the V repo
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folder somewhere else.
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### Docker
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<details><summary>Expand Docker instructions</summary>
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```bash
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git clone https://github.com/vlang/v
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cd v
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docker build -t vlang .
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docker run --rm -it vlang:latest
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v
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```
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### Docker with Alpine/musl:
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```bash
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git clone https://github.com/vlang/v
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cd v
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docker build -t vlang --file=Dockerfile.alpine .
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docker run --rm -it vlang:latest
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/usr/local/v/v
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```
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</details>
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### Testing and running the examples
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Make sure V can compile itself:
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```
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v -o v2 cmd/v
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```
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```bash
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$ v
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V 0.1.x
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Use Ctrl-C or `exit` to exit
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>>> println('hello world')
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hello world
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>>>
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```
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```bash
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cd examples
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v hello_world.v && ./hello_world # or simply
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v run hello_world.v # this builds the program and runs it right away
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v word_counter.v && ./word_counter cinderella.txt
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v run news_fetcher.v
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v run tetris/tetris.v
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```
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<img src='https://raw.githubusercontent.com/vlang/v/master/examples/tetris/screenshot.png' width=300>
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In order to build Tetris and anything else using the graphics module, you will need to install glfw and freetype libraries.
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If you plan to use the http package, you also need to install OpenSSL on non-Windows systems.
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```
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macOS:
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brew install glfw freetype openssl
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Debian/Ubuntu:
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sudo apt install libglfw3 libglfw3-dev libfreetype6-dev libssl-dev
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Arch/Manjaro:
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sudo pacman -S glfw-x11 freetype2
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Fedora:
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sudo dnf install glfw glfw-devel freetype-devel
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Windows:
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v setup-freetype
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```
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glfw dependency will be removed soon.
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## V UI
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<a href="https://github.com/vlang/ui">
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<img src='https://raw.githubusercontent.com/vlang/ui/master/examples/screenshot.png' width=712>
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</a>
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https://github.com/vlang/ui
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<!---
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## JavaScript backend
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[examples/hello_v_js.v](examples/hello_v_js.v):
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```v
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fn main() {
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for i in 0..3 {
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println('Hello from V.js')
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}
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}
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```
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```bash
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v -o hi.js examples/hello_v_js.v && node hi.js
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Hello from V.js
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Hello from V.js
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Hello from V.js
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```
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-->
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## Troubleshooting
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Please see the [Troubleshooting](https://github.com/vlang/v/wiki/Troubleshooting) section on our [wiki page](https://github.com/vlang/v/wiki)
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[WorkflowBadge]: https://github.com/vlang/v/workflows/CI/badge.svg
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[DiscordBadge]: https://img.shields.io/discord/592103645835821068?label=Discord&logo=discord&logoColor=white
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[PatreonBadge]: https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.herokuapp.com%2Fvlang%2Fpledges&label=Patreon
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[SponsorBadge]: https://camo.githubusercontent.com/da8bc40db5ed31e4b12660245535b5db67aa03ce/68747470733a2f2f696d672e736869656c64732e696f2f7374617469632f76313f6c6162656c3d53706f6e736f72266d6573736167653d254532253944254134266c6f676f3d476974487562
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[TwitterBadge]: https://twitter.com/v_language
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[WorkflowUrl]: https://github.com/vlang/v/commits/master
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[DiscordUrl]: https://discord.gg/vlang
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[PatreonUrl]: https://patreon.com/vlang
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[SponsorUrl]: https://github.com/sponsors/medvednikov
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[TwitterUrl]: https://img.shields.io/twitter/follow/v_language.svg?style=flatl&label=Follow&logo=twitter&logoColor=white&color=1da1f2
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