build-manifest

This tool generates the manifests uploaded to static.rust-lang.org and used by rustup. The tool is invoked by the bootstrap tool.

Testing changes locally

In order to test the changes locally you need to have a valid dist directory available locally. If you don't want to build all the compiler, you can easily create one from the nightly artifacts with:

#!/bin/bash
for cmpn in rust rustc rust-std rust-docs cargo; do
    wget https://static.rust-lang.org/dist/${cmpn}-nightly-x86_64-unknown-linux-gnu.tar.gz
done

Then, you can generate the manifest and all the packages from path/to/dist to path/to/output with:

$ BUILD_MANIFEST_DISABLE_SIGNING=1 cargo +nightly run \
    path/to/dist path/to/output 1970-01-01 \
    nightly nightly nightly nightly nightly nightly nightly \
    http://example.com

In the future, if the tool complains about missing arguments just add more nightlys in the middle.