Deno – A secure TypeScript runtime on V8
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deno
Linux & Mac WindowsA secure TypeScript runtime built on V8
-
Supports TypeScript 3.0 out of the box. Uses V8 7.0. That is, it's very modern JavaScript.
-
No
package.json
. No npm. Not explicitly compatible with Node. -
Imports reference source code URLs only.
import { test } from "https://unpkg.com/[email protected]/testing.ts" import { log } from "./util.ts"
Remote code is fetched and cached on first execution, and never updated until the code is run with the--reload
flag. (So, this will still work on an airplane. See~/.deno/src
for details on the cache.) -
File system and network access can be controlled in order to run sandboxed code. Defaults to read-only file system access and no network access. Access between V8 (unprivileged) and Rust (privileged) is only done via serialized messages defined in this flatbuffer . This makes it easy to audit. To enable write access explicitly use
--allow-write
and--allow-net
for network access. -
Single executable:
> ls -lh out/release/deno -rwxr-xr-x 1 rld staff 48M Aug 2 13:24 out/release/deno > otool -L out/release/deno out/release/deno: /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.50.4) /usr/lib/libresolv.9.dylib (compatibility version 1.0.0, current version 1.0.0) /System/Library/Frameworks/Security.framework/Versions/A/Security (compatibility version 1.0.0, current version 58286.51.6) /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 400.9.0) >
-
Always dies on uncaught errors.
-
Aims to be browser compatible.
Install
With Python:
curl -sSf https://raw.githubusercontent.com/denoland/deno_install/master/install.py | python
With PowerShell:
iex (iwr https://raw.githubusercontent.com/denoland/deno_install/master/install.ps1)
Note: Depending on your security settings, you may have to run Set-ExecutionPolicy RemoteSigned -Scope CurrentUser
first to allow downloaded scripts to be executed.
Try it:
> deno http://deno.land/thumb.ts
See also deno_install .
Status
Under development.
We make binary releases here .
Progress towards future releases is tracked here .
Roadmap is here . Also see this presentation .
Build instructions
To ensure reproducible builds, Deno has most of its dependencies in a git submodule. However, you need to install separately:
- Rust
- Node
- Python 2. Not 3 .
- ccache (Optional but helpful for speeding up rebuilds of V8.).
- Extra steps for Windows users:
- Add
python.exe
toPATH
. E.g.set PATH=%PATH%;C:\Python27\python.exe
- Get VS Community 2017 , make sure to select the option to install C++ tools and the Windows SDK
- Enable
Debugging Tools for Windows
, Goto Control Panel -> Windows 10 SDK -> Right-Click -> Change -> Change -> Check Debugging Tools for Windows -> Change -> Finish
- Add
To build:
# Fetch deps. git clone --recurse-submodules https://github.com/denoland/deno.git cd deno ./tools/setup.py # Build. ./tools/build.py # Run. ./out/debug/deno tests/002_hello.ts # Test. ./tools/test.py # Format code. ./tools/format.py
Before running ./tools/format.py
, make sure you have yapf
installed for the current Python and rustfmt
for Rust. They can be installed by:
pip install yapf rustup component add rustfmt-preview
Other useful commands:
# Call ninja manually. ./third_party/depot_tools/ninja -C out/debug # Build a release binary. DENO_BUILD_MODE=release ./tools/build.py :deno # List executable targets. ./third_party/depot_tools/gn ls out/debug //:* --as=output --type=executable # List build configuation. ./third_party/depot_tools/gn args out/debug/ --list # Edit build configuration. ./third_party/depot_tools/gn args out/debug/ # Describe a target. ./third_party/depot_tools/gn desc out/debug/ :deno ./third_party/depot_tools/gn help
Env vars: DENO_BUILD_MODE
, DENO_BUILD_PATH
, DENO_BUILD_ARGS
.
Contributing
- Fork this repository and create your branch from
master
. - Make your change.
- Ensure
./tools/test.py
passes. - Format your code with
./tools/format.py
. - Make sure
./tools/lint.py
passes. - Send a pull request.
- Sign the CLA , if you haven't already.
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