sccache.md

created	daily	tags	origin	similar to	opposite of	leads to
2025-04-01	[[2025-04-01, Wk 14 - Tue]]	”notes”	https://github.com/mozilla/sccache https://github.com/marketplace/actions/sccache-action			[[31.22.30 Build Systems]]

1.0 Summary

sccache is a modular build cache for compiled languages. It supports different programming languages and different storage backends. This makes it a particularly flexible tool.

2.0 Installation

brew install sccache
mkdir -p "$HOME/.cargo/"
touch "$HOME/.cargo/config.toml"

Then add this to $HOME/.cargo/config.toml:

[build]
rustc-wrapper = "/path/to/sccache"

3.0 Overriding the cache

Caches can fail or get stale. To force a cache reset run:

SCCACHE_RECACHE=1 cargo build

4.0 GitHub Actions

- name: Run sccache-cache only on non-release runs
  if: github.event_name != 'release' && github.event_name != 'workflow_dispatch'
  uses: mozilla-actions/[email protected]

- name: Set Rust caching env vars only on non-release runs
  if: github.event_name != 'release' && github.event_name != 'workflow_dispatch'
  run: |
    echo "SCCACHE_GHA_ENABLED=true" >> $GITHUB_ENV
    echo "RUSTC_WRAPPER=sccache" >> $GITHUB_ENV