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Auto merge of #2736 - RalfJung:josh, r=oli-obk

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update josh instructions

Fixes https://github.com/rust-lang/miri/issues/2730

r\? `@oli-obk`
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bors 2022-12-21 16:59:31 +00:00
commit 5b64c91c26
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src/tools/miri/CONTRIBUTING.md
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@ -232,16 +232,16 @@ You can also directly run Miri on a Rust source file:
## Advanced topic: Syncing with the rustc repo
We use the [`josh` proxy](https://github.com/josh-project/josh) to transmit
changes between the rustc and Miri repositories. For now, the latest git version
of josh needs to be built from source. This downloads and runs josh:
We use the [`josh` proxy](https://github.com/josh-project/josh) to transmit changes between the
rustc and Miri repositories. The eaisest way to run josh is via docker:
```sh
git clone https://github.com/josh-project/josh
cd josh
cargo run --release -p josh-proxy -- --local=local --remote=https://github.com --no-background
docker pull joshproject/josh-proxy:latest
docker run -it -p 8000:8000 -e JOSH_REMOTE=https://github.com -e JOSH_EXTRA_OPTS=--no-background -v josh-vol:/data/git joshproject/josh-proxy:latest
```
This sets up a local volume `josh-vol` for josh's cache.
### Importing changes from the rustc repo
Josh needs to be running, as described above.