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102 lines
3.4 KiB
Markdown
102 lines
3.4 KiB
Markdown
# deno
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[](https://travis-ci.com/ry/deno)
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## A secure TypeScript runtime built on V8
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* Supports TypeScript 2.8 out of the box. Uses V8 6.9.297. 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 Golang (privileged) is only done via
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serialized messages defined in this
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[protobuf](https://github.com/ry/deno/blob/master/src/msg.proto). 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 deno
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-rwxrwxr-x 1 ryan ryan 55M May 28 23:46 deno
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> ldd deno
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linux-vdso.so.1 => (0x00007ffc6797a000)
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libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f104fa47000)
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libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f104f6c5000)
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libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f104f3bc000)
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libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f104f1a6000)
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libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f104eddc000)
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/lib64/ld-linux-x86-64.so.2 (0x00007f104fc64000)
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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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## Status
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Segfaulty. Check back soon.
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Roadmap is [here](https://github.com/ry/deno/blob/master/Roadmap.md).
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Also see this presentation: http://tinyclouds.org/jsconf2018.pdf
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I am excited about all the interest in this project. However, do understand that this
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is very much a non-functional prototype. There's a huge amount of heavy lifting to do.
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Unless you are participating in that, please maintain radio silence on github. This
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includes submitting trivial PRs (like improving README build instructions).
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## Build instructions
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To ensure reproducable builds, Deno has most of its dependencies in a git
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submodule. However, you need
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[rustc](https://www.rust-lang.org/en-US/install.html) installed separately.
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You probably want
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[ccache](https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/ccache)
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installed too.
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To build:
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# Fetch deps.
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git clone --recurse-submodules https://github.com/ry/deno.git
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cd deno
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./tools/run_hooks.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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Other useful commands:
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# Call ninja manually.
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./third_party/depot_tools/ninja -C out/debug :all
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# Build a release binary.
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./tools/build.py --mode=release :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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