ci: only run linux in PR by default, and run the rest on labels

.github/workflows/rust.yml

@@ -1,53 +1,45 @@
 on:
   push:
     tags:
-      - "v*.*.*"
+      - v*.*.*
     branches:
       - main
     paths-ignore:
-      - "docs/**"
-      - "mkdocs.yml"
+      - docs/**
+      - mkdocs.yml
       - "*.md"
-  workflow_dispatch:
+  workflow_dispatch: null
   pull_request:
     paths-ignore:
-      - "docs/**"
-      - "mkdocs.yml"
+      - docs/**
+      - mkdocs.yml
       - "*.md"
-
 name: Rust
-
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
-
 env:
   RUST_LOG: info
   RUST_BACKTRACE: 1
-  RUSTFLAGS: "-D warnings"
+  RUSTFLAGS: -D warnings
   CARGO_TERM_COLOR: always
-  CICD_INTERMEDIATES_DIR: "_cicd-intermediates"
+  CICD_INTERMEDIATES_DIR: _cicd-intermediates
   XDG_CACHE_HOME: ${{ github.workspace }}/.cache
-
 jobs:
   check-rustdoc-links:
     name: Check intra-doc links
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
       - uses: Swatinem/rust-cache@v2
         with:
           save-if: false
-      # - name: Run sccache-cache
-      #   uses: mozilla-actions/sccache-action@v0.0.5
-
       - uses: actions-rust-lang/setup-rust-toolchain@v1
-      - run: |
-          for package in $(cargo metadata --no-deps --format-version=1 | jq -r '.packages[] | .name'); do
+      - run: >
+          for package in $(cargo metadata --no-deps --format-version=1 | jq -r
+          '.packages[] | .name'); do
             cargo rustdoc -p "$package" --all-features -- -D warnings -W unreachable-pub
           done
-
   format:
     name: Cargo Format
     runs-on: ubuntu-latest
@@ -60,7 +52,6 @@ jobs:
           components: rustfmt
       - name: Run rustfmt
         uses: actions-rust-lang/rustfmt@v1
-
   lint:
     name: Cargo Lint
     runs-on: ubuntu-latest
@@ -76,26 +67,27 @@ jobs:
           save-if: false
       - name: Run clippy
         run: cargo clippy --all-targets --workspace
-
   crate_metadata:
     name: Extract crate metadata
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - name: Extract crate information
         id: crate_metadata
-        run: |
-          cargo metadata --no-deps --format-version 1 | jq -r '"name=" + (.packages[] | select(.name == "pixi") | .name)' | tee -a $GITHUB_OUTPUT
+        run: >
+          cargo metadata --no-deps --format-version 1 | jq -r '"name=" + (.packages[]
+          | select(.name == "pixi") | .name)' | tee -a $GITHUB_OUTPUT
+
           cargo metadata --no-deps --format-version 1 | jq -r '"version=" + (.packages[] | select(.name == "pixi") | .version)' | tee -a $GITHUB_OUTPUT
+
           cargo metadata --no-deps --format-version 1 | jq -r '"maintainer=" + (.packages[] | select(.name == "pixi") | .authors[0])' | tee -a $GITHUB_OUTPUT
+
           cargo metadata --no-deps --format-version 1 | jq -r '"homepage=" + (.packages[] | select(.name == "pixi") | .homepage)' | tee -a $GITHUB_OUTPUT
     outputs:
       name: ${{ steps.crate_metadata.outputs.name }}
       version: ${{ steps.crate_metadata.outputs.version }}
       maintainer: ${{ steps.crate_metadata.outputs.maintainer }}
       homepage: ${{ steps.crate_metadata.outputs.homepage }}
-
-  # Checks for dependencies that are not used in the codebase
   cargo-machete:
     name: Cargo Machete
     runs-on: ubuntu-latest
@@ -104,27 +96,32 @@ jobs:
         uses: actions/checkout@v3
       - name: Machete
         uses: bnjbvr/cargo-machete@main
-
   cargo-test:
     name: Cargo Test | ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
+    if: ${{ matrix.run_if }}
     strategy:
       fail-fast: false
       matrix:
         include:
-          - {
-              name: "Linux",
-              target: x86_64-unknown-linux-musl,
-              os: "${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'ubuntu-latest' || '8core_ubuntu_latest_runner' }}",
-            }
-          - { name: "macOS", target: x86_64-apple-darwin, os: macos-13 }
-          - { name: "macOS-arm", target: aarch64-apple-darwin, os: macos-14 }
-          - {
-              name: "Windows",
-              target: x86_64-pc-windows-msvc,
-              os: "${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'windows-latest' || '16core_windows_latest_runner' }}",
-            }
+          - name: Linux
+            target: x86_64-unknown-linux-musl
+            os: ${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'ubuntu-latest' || '8core_ubuntu_latest_runner' }}
+            run_if: true
+          - name: macOS
+            target: x86_64-apple-darwin
+            os: macos-13
+            run_if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:macos') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+          - name: "macOS-arm"
+            target: aarch64-apple-darwin
+            os: macos-14
+            if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:macos-arm') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+          - name: "Windows"
+            target: x86_64-pc-windows-msvc
+            os: "${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'windows-latest' || '16core_windows_latest_runner' }}"
+            run_if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:win') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+
 
     steps:
       - uses: actions/checkout@v4
@@ -161,35 +158,38 @@ jobs:
   build:
     name: Build Binary | ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
-    needs: [crate_metadata]
+    needs: [ crate_metadata ]
+    # Run full set on main branch and on tags, otherwise run linux and all labels defined in the PR
+    if: ${{ matrix.run_if }}
     strategy:
       fail-fast: false
       matrix:
         include:
-          - {
-              name: "Linux-x86_64",
-              target: x86_64-unknown-linux-musl,
-              os: "${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'ubuntu-latest' || '8core_ubuntu_latest_runner' }}"
-            }
-          - {
-              name: "Linux-aarch64",
-              target: aarch64-unknown-linux-musl,
-              os: ubuntu-latest,
-            }
-
-          - { name: "macOS-x86", target: x86_64-apple-darwin, os: macos-13 }
-          - { name: "macOS-arm", target: aarch64-apple-darwin, os: macos-14 } # macOS-14 is the ARM chipset
-
-          - {
-              name: "Windows",
-              target: x86_64-pc-windows-msvc,
-              os: "${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'windows-latest' || '16core_windows_latest_runner' }}"
-            }
-          - {
-              name: "Windows-arm",
-              target: aarch64-pc-windows-msvc,
-              os: windows-latest,
-            }
+          - name: Linux
+            target: x86_64-unknown-linux-musl
+            os: ${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'ubuntu-latest' || '8core_ubuntu_latest_runner' }}
+            run_if: true
+          - name: "Linux-aarch64"
+            target: aarch64-unknown-linux-musl
+            os: ubuntu-latest
+            run_if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+          - name: macOS
+            target: x86_64-apple-darwin
+            os: macos-13
+            run_if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:macos') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+          - name: "macOS-arm"
+            target: aarch64-apple-darwin
+            os: macos-14
+            run_if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:macos-arm') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+          - name: "Windows"
+            target: x86_64-pc-windows-msvc
+            os: "${{ contains(github.event.pull_request.labels.*.name, 'ci:free') && 'windows-latest' || '16core_windows_latest_runner' }}"
+            run_if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:win') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+          - name: "Windows-arm"
+            target: aarch64-pc-windows-msvc
+            os: windows-latest
+            run_if: ${{ (github.event_name != 'pull_request') || contains(github.event.pull_request.labels.*.name, 'ci:win-arm') || contains(github.event.pull_request.labels.*.name, 'ci:all') }}
+
     env:
       #
       # These are some environment variables that configure the build so that the binary size is reduced.