mirror of
https://github.com/denoland/deno.git
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151 lines
4.7 KiB
Markdown
151 lines
4.7 KiB
Markdown
# deno
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| [](https://travis-ci.com/denoland/deno) | [](https://ci.appveyor.com/project/deno/deno) |
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## A secure TypeScript runtime built on V8
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* Supports TypeScript 3.0 out of the box. Uses V8 7.0. That is, it's
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very modern JavaScript.
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* No `package.json`. No npm. Not explicitly compatible with Node.
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* Imports reference source code URLs only.
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```
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import { test } from "https://unpkg.com/deno_testing@0.0.5/testing.ts"
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import { log } from "./util.ts"
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```
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Remote code is fetched and cached on first execution, and never updated until
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the code is run with the `--reload` flag. (So, this will still work on an
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airplane. See `~/.deno/src` for details on the cache.)
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* File system and network access can be controlled in order to run sandboxed
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code. Defaults to read-only file system access and no network access.
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Access between V8 (unprivileged) and Rust (privileged) is only done via
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serialized messages defined in this
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[flatbuffer](https://github.com/denoland/deno/blob/master/src/msg.fbs). This makes it
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easy to audit.
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To enable write access explicitly use `--allow-write` and `--allow-net` for
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network access.
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* Single executable:
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```
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> ls -lh out/release/deno
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-rwxr-xr-x 1 rld staff 48M Aug 2 13:24 out/release/deno
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> otool -L out/release/deno
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out/release/deno:
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/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.50.4)
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/usr/lib/libresolv.9.dylib (compatibility version 1.0.0, current version 1.0.0)
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/System/Library/Frameworks/Security.framework/Versions/A/Security (compatibility version 1.0.0, current version 58286.51.6)
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/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 400.9.0)
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>
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```
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* Always dies on uncaught errors.
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* Supports top-level `await`.
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* Aims to be browser compatible.
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## Install
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**With Python:**
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```
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curl -sSf https://raw.githubusercontent.com/denoland/deno_install/master/install.py | python
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```
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**With PowerShell:**
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```powershell
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iex (iwr https://raw.githubusercontent.com/denoland/deno_install/master/install.ps1)
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```
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_Note: Depending on your security settings, you may have to run `Set-ExecutionPolicy RemoteSigned -Scope CurrentUser` first to allow downloaded scripts to be executed._
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Try it:
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```
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> deno http://deno.land/thumb.ts
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```
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See also [deno_install](https://github.com/denoland/deno_install).
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## Status
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Under development.
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We make binary releases [here](https://github.com/denoland/deno/releases).
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Progress towards future releases is tracked
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[here](https://github.com/denoland/deno/milestones).
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Roadmap is [here](https://github.com/denoland/deno/blob/master/Roadmap.md).
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Also see [this presentation](http://tinyclouds.org/jsconf2018.pdf).
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[Benchmarks](https://denoland.github.io/deno/)
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[Chat room](https://gitter.im/denolife/Lobby).
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## Build instructions
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To ensure reproducible builds, Deno has most of its dependencies in a git
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submodule. However, you need to install separately:
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1. [Rust](https://www.rust-lang.org/en-US/install.html)
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2. [Node](http://nodejs.org/)
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3. Python 2. [Not 3](https://github.com/denoland/deno/issues/464#issuecomment-411795578).
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4. [ccache](https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/ccache) (Optional but helpful for speeding up rebuilds of V8.)
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.
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To build:
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# Fetch deps.
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git clone --recurse-submodules https://github.com/denoland/deno.git
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cd deno
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./tools/setup.py
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# Build.
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./tools/build.py
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# Run.
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./out/debug/deno tests/002_hello.ts
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# Test.
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./tools/test.py
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# Format code.
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./tools/format.py
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Other useful commands:
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# Call ninja manually.
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./third_party/depot_tools/ninja -C out/debug
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# Build a release binary.
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DENO_BUILD_MODE=release ./tools/build.py :deno
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# List executable targets.
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./third_party/depot_tools/gn ls out/debug //:* --as=output --type=executable
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# List build configuation.
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./third_party/depot_tools/gn args out/debug/ --list
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# Edit build configuration.
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./third_party/depot_tools/gn args out/debug/
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# Describe a target.
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./third_party/depot_tools/gn desc out/debug/ :deno
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./third_party/depot_tools/gn help
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Env vars: `DENO_BUILD_MODE`, `DENO_BUILD_PATH`, `DENO_BUILD_ARGS`.
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## Contributing
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1. Fork [this repository](https://github.com/denoland/deno) and create your branch from `master`.
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2. Make your change.
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3. Ensure `./tools/test.py` passes.
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4. Format your code with `./tools/format.py`.
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5. Make sure `./tools/lint.py` passes.
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6. Send a pull request.
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7. Sign the [CLA](https://cla-assistant.io/denoland/deno), if you haven't already.
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