feat: allow version pinning & arbitrary downgrades via `RUSTUP_VERSION` #2246

Set up job

Run actions/checkout@v4

Acquire tags for the repo

Display the current git status

Prep cargo dirs

Set environment variables appropriately for the build

Skip tests

Cache cargo registry and git trees

Get rustc commit hash

Cache cargo build

Install Rustup using ./rustup-init.sh

Ensure Stable is up to date

10s

Ensure we have our goal target installed

Run a full build and test

1m 56s

Dump dynamic link targets

Upload the built artifact

Ensure that awscli is installed

Prepare the dist

Deploy build to dev-static dist tree for release team

Configure AWS credentials

Deploy build to rustup-builds bucket for release team

Clear the cargo caches

Flush cache

Post Cache cargo build

Post Cache cargo registry and git trees

Post Run actions/checkout@v4

Complete job

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