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action.yml
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name: Setup Rust Toolchain for GitHub CI
description: |
Setup specific Rust versions with caching pre-configured.
It provides problem matchers for cargo and rustfmt issues.
branding:
icon: "play"
color: "gray-dark"
# Add option to install directly from rust-toolchain file
# Blocked on rustup support: https://github.com/rust-lang/rustup/issues/2686
#
# The action is heavily inspired by https://github.com/dtolnay/rust-toolchain
inputs:
toolchain:
description: "Comma-separated list of Rust toolchain specifications. Last version becomes the default. -- see https://rust-lang.github.io/rustup/concepts/toolchains.html#toolchain-specification"
required: false
target:
description: "Target triple to install for this toolchain"
required: false
components:
description: "Comma-separated list of components to be additionally installed"
required: false
cache:
description: "Automatically configure Rust cache"
required: false
default: "true"
cache-workspaces:
description: "Paths to multiple Cargo workspaces and their target directories, separated by newlines."
required: false
cache-directories:
description: "Additional non workspace directories to be cached, separated by newlines."
required: false
cache-on-failure:
description: "Also cache on workflow failures"
default: "true"
required: false
cache-key:
description: "An additional cache key that is added alongside the automatic `job`-based cache key and can be used to further differentiate jobs."
required: false
cache-shared-key:
description: "A cache key that is used instead of the automatic `job`-based key, and is stable over multiple jobs."
required: false
cache-bin:
description: "Determines whether to cache ${CARGO_HOME}/bin."
required: false
default: "true"
matcher:
description: "Enable the Rust problem matcher"
required: false
default: "true"
rustflags:
description: "set RUSTFLAGS environment variable, set to empty string to avoid overwriting build.rustflags"
required: false
default: "-D warnings"
override:
description: "Setup the last installed toolchain as the default via `rustup override`"
required: false
default: "true"
outputs:
rustc-version:
description: "Version as reported by `rustc --version`"
value: ${{steps.versions.outputs.rustc-version}}
cargo-version:
description: "Version as reported by `cargo --version`"
value: ${{steps.versions.outputs.cargo-version}}
rustup-version:
description: "Version as reported by `rustup --version`"
value: ${{steps.versions.outputs.rustup-version}}
cachekey:
description: A short hash of the rustc version, appropriate for use as a cache key. "20220627a831"
value: ${{steps.versions.outputs.cachekey}}
runs:
using: composite
steps:
# The later code uses "newer" bash features, which are not available in the ancient bash 3 (from 2014) of macOS
- name: Unbork mac
if: runner.os == 'macOS'
run: |
brew install bash
shell: bash
- id: flags
env:
targets: ${{inputs.target}}
components: ${{inputs.components}}
shell: bash
run: |
: construct rustup command line
echo "targets=$(for t in ${targets//,/ }; do echo -n ' --target' $t; done)" >> $GITHUB_OUTPUT
echo "components=$(for c in ${components//,/ }; do echo -n ' --component' $c; done)" >> $GITHUB_OUTPUT
echo "downgrade=${{contains(inputs.toolchain, 'nightly') && inputs.components && ' --allow-downgrade' || ''}}" >> $GITHUB_OUTPUT
# The environment variables always need to be set before the caching action
- name: Setting Environment Variables
env:
NEW_RUSTFLAGS: ${{inputs.rustflags}}
shell: bash
run: |
if [[ ! -v CARGO_INCREMENTAL ]]; then
echo "CARGO_INCREMENTAL=0" >> $GITHUB_ENV
fi
if [[ ! -v CARGO_PROFILE_DEV_DEBUG ]]; then
echo "CARGO_PROFILE_DEV_DEBUG=0" >> $GITHUB_ENV
fi
if [[ ! -v CARGO_TERM_COLOR ]]; then
echo "CARGO_TERM_COLOR=always" >> $GITHUB_ENV
fi
if [[ ! -v RUST_BACKTRACE ]]; then
echo "RUST_BACKTRACE=short" >> $GITHUB_ENV
fi
if [[ ( ! -v RUSTFLAGS ) && $NEW_RUSTFLAGS != "" ]]; then
echo "RUSTFLAGS=$NEW_RUSTFLAGS" >> $GITHUB_ENV
fi
# Enable faster sparse index on nightly
# The value is ignored on stable and causes no problems
# https://internals.rust-lang.org/t/call-for-testing-cargo-sparse-registry/16862
if [[ ! -v CARGO_UNSTABLE_SPARSE_REGISTRY ]]; then
echo "CARGO_UNSTABLE_SPARSE_REGISTRY=true" >> $GITHUB_ENV
fi
if [[ ! -v CARGO_REGISTRIES_CRATES_IO_PROTOCOL ]]; then
echo "CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse" >> $GITHUB_ENV
fi
- name: Install Rust Problem Matcher
if: inputs.matcher == 'true'
shell: bash
run: echo "::add-matcher::${{ github.action_path }}/rust.json"
- name: Install rustup, if needed
if: runner.os != 'Windows'
shell: bash
run: |
if ! command -v rustup &> /dev/null ; then
curl --proto '=https' --tlsv1.2 --retry 10 --retry-connrefused -fsSL "https://sh.rustup.rs" | sh -s -- --default-toolchain none -y
echo "${CARGO_HOME:-$HOME/.cargo}/bin" >> $GITHUB_PATH
fi
- name: rustup toolchain install ${{inputs.toolchain || 'stable'}}
env:
toolchain: ${{inputs.toolchain}}
targets: ${{inputs.target}}
components: ${{inputs.components}}
override: ${{inputs.override}}
shell: bash
run: |
if [[ -z "$toolchain" && ( -f "rust-toolchain" || -f "rust-toolchain.toml" ) ]]
then
# Install the toolchain as specified in the file
# rustup show is the old way that implicitly installed a toolchain
# rustup toolchain install is the new explicit way
# https://github.com/rust-lang/rustup/issues/3635#issuecomment-2343511297
rustup show active-toolchain || rustup toolchain install
if [[ -n $components ]]; then
rustup component add ${components//,/ }
fi
if [[ -n $targets ]]; then
rustup target add ${targets//,/ }
fi
else
if [[ -z "$toolchain" ]]
then
toolchain=stable
fi
rustup toolchain install ${toolchain//,/ } ${{steps.flags.outputs.targets}}${{steps.flags.outputs.components}} --profile minimal${{steps.flags.outputs.downgrade}} --no-self-update
# Take the last element from the list
if [[ "$override" == "true" ]]
then
rustup override set ${toolchain//*,/ }
fi
fi
- id: versions
name: Print installed versions
shell: bash
run: |
echo "rustc-version=$(rustc --version)" >> $GITHUB_OUTPUT
rustc --version --verbose
echo "cargo-version=$(cargo --version)" >> $GITHUB_OUTPUT
cargo --version --verbose
echo "rustup-version=$(rustup --version)" >> $GITHUB_OUTPUT
rustup --version
DATE=$(rustc --version --verbose | sed -ne 's/^commit-date: \(20[0-9][0-9]\)-\([01][0-9]\)-\([0-3][0-9]\)$/\1\2\3/p')
HASH=$(rustc --version --verbose | sed -ne 's/^commit-hash: //p')
echo "cachekey=$(echo $DATE$HASH | head -c12)" >> $GITHUB_OUTPUT
- name: Downgrade registry access protocol when needed
shell: bash
run: |
# Not all versions support setting CARGO_REGISTRIES_CRATES_IO_PROTOCOL
# On versions 1.66, 1.67, and 1.68.0-nightly the value "sparse" is still unstable.
# https://github.com/dtolnay/rust-toolchain/pull/69#discussion_r1107268108
# If we detect an incompatible value, set it to "git" which is always supported.
if [[ "${{steps.versions.outputs.rustc-version}}" =~ ^rustc\ (1\.6[67]\.|1\.68\.0-nightly) && "${CARGO_REGISTRIES_CRATES_IO_PROTOCOL}" == "sparse" ]]; then
echo "Downgrade cargo registry protocol to git"
echo "CARGO_REGISTRIES_CRATES_IO_PROTOCOL=git" >> $GITHUB_ENV
fi
- name: Setup Rust Caching
if: inputs.cache == 'true'
uses: Swatinem/rust-cache@v2
with:
workspaces: ${{inputs.cache-workspaces}}
cache-directories: ${{inputs.cache-directories}}
cache-on-failure: ${{inputs.cache-on-failure}}
cache-bin: ${{inputs.cache-bin}}
key: ${{inputs.cache-key}}
shared-key: ${{inputs.cache-shared-key}}