CI: Tidy up

.github/workflows/rust.yml

@@ -9,116 +9,43 @@ on:   # yamllint disable-line rule:truthy
 name: Continuous integration
 
 jobs:
-  Stable:                       # 2 jobs, one per lock file.
-    name: Test - stable toolchain
-    runs-on: ubuntu-latest
+  Stable:
+    name: Test - ${{ matrix.toolchain }} toolchain, ${{ matrix.dep }} deps
+    runs-on: ubuntu-26.04
     strategy:
       fail-fast: false
       matrix:
+        toolchain: [stable, msrv]
         dep: [minimal, recent]
     steps:
-      - name: "Checkout repo"
-        uses: actions/checkout@v6
-      - uses: ./.github/actions/prepare
-        with:
-          toolchain: stable
-      - name: "Run tests"
-        run: cargo rbmt test stable --lock-file ${{ matrix.dep }}
-
-  Nightly:                      # 2 jobs, one per lock file.
-    name: Test - nightly toolchain
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        dep: [minimal, recent]
-    steps:
-      - uses: actions/checkout@v6
-      - uses: ./.github/actions/prepare
-        with:
-          toolchain: nightly
-      - name: "Run tests"
-        run: cargo rbmt test nightly --lock-file ${{ matrix.dep }}
-
-  MSRV:                         # 2 jobs, one per lock file.
-    name: Test - 1.63.0 toolchain
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        dep: [minimal, recent]
-    steps:
-      - uses: actions/checkout@v6
-      - name: "Free disk space"
-        uses: endersonmenezes/free-disk-space@v3
-        with:
-          remove_android: true
-          remove_dotnet: true
-          remove_haskell: true
-      - uses: ./.github/actions/prepare
+      # Cleaning up github bloat so that test feature artifacts don't run out of disk.
+      - uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be # v1.3.1
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
-          toolchain: "1.63.0"
+          persist-credentials: false
+      - uses: ./.github/actions/setup-rbmt
       - name: "Run tests"
-        run: cargo rbmt test msrv --lock-file ${{ matrix.dep }}
+        run: cargo rbmt test --toolchain ${{ matrix.toolchain }} --lock-file ${{ matrix.dep }}
 
-  Lint:
-    name: Lint - nightly toolchain
-    runs-on: ubuntu-latest
+  Check:
+    runs-on: ubuntu-26.04
+    permissions:
+      contents: read
     strategy:
       fail-fast: false
       matrix:
-        dep: [recent]
+        task: [lint, docs, docsrs, bench]
     steps:
-      - uses: actions/checkout@v6
-      - uses: ./.github/actions/prepare
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
-          toolchain: nightly
-          components: clippy
-      - name: "Run lint"
-        run: cargo rbmt lint
-
-  Docs:
-    name: Docs - stable toolchain
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v6
-      - uses: ./.github/actions/prepare
-        with:
-          toolchain: stable
-      - name: "Build docs"
-        run: cargo rbmt docs
-
-  Docsrs:
-    name: Docs - nightly toolchain
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v6
-      - uses: ./.github/actions/prepare
-        with:
-          toolchain: nightly
-      - name: "Build docs.rs docs"
-        run: cargo rbmt docsrs
-
-  Bench:
-    name: Bench - nightly toolchain
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v6
-      - uses: ./.github/actions/prepare
-        with:
-          toolchain: nightly
-      - name: "Run bench"
-        run: cargo rbmt bench
+          persist-credentials: false
+      - uses: ./.github/actions/setup-rbmt
+      - name: "Run ${{ matrix.task }}"
+        run: cargo rbmt ${{ matrix.task }}
 
-  Format:                       #  1 job, run cargo fmt directly.
+  Format:
     name: Format - nightly toolchain
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     strategy:
       fail-fast: false
     steps:
@@ -130,9 +57,9 @@ jobs:
       - name: "Check formatting"
         run: cargo fmt --all -- --check
 
-  Integration:                  # 1 job for each bitcoind version we support.
+  Integration:
     name: Integration tests - stable toolchain
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     strategy:
       fail-fast: false
       matrix:
@@ -162,7 +89,7 @@ jobs:
         run: cargo rbmt integration
 
   Embedded:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2