first commit

.github/actions/setup-rust/action.yml

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+name: 'Rust Setup'
+description: 'Sets up the Rust toolchain for CI'
+inputs:
+  targets:
+    description: 'Comma-separated list of target triples to install for this toolchain'
+    required: false
+
+runs:
+  using: 'composite'
+  steps:
+    - name: 'Setup Rust toolchain'
+      uses: actions-rust-lang/setup-rust-toolchain@v1
+      with:
+        target: ${{ inputs.targets }}
+        # needed to not make it override the defaults
+        rustflags: ''
+        cache: false
+
+    - name: 'Install LLD (LLVM Linker) for Linux'
+      if: runner.os == 'Linux'
+      shell: bash
+      run: |
+        sudo apt-get -y -o DPkg::Lock::Timeout=60 update
+        sudo apt-get -o DPkg::Lock::Timeout=60 -y install lld
+
+    - name: 'Add cargo problem matchers'
+      shell: bash
+      run: echo "::add-matcher::${{ github.action_path }}/matchers.json"

.github/actions/setup-rust/matchers.json

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+{
+  "problemMatcher": [
+    {
+      "owner": "cargo-common",
+      "pattern": [
+        {
+          "regexp": "^(warning|warn|error)(?:\\[(\\S*)\\])?: (.*)$",
+          "severity": 1,
+          "code": 2,
+          "message": 3
+        },
+        {
+          "regexp": "^(?:[\\s->=]*(.*):(\\d*):(\\d*)|.*)$",
+          "file": 1,
+          "line": 2,
+          "column": 3
+        }
+      ]
+    },
+    {
+      "owner": "cargo-test",
+      "pattern": [
+        {
+          "regexp": "^.*panicked\\s+at\\s+'(.*)',\\s+(.*):(\\d+):(\\d+)$",
+          "message": 1,
+          "file": 2,
+          "line": 3,
+          "column": 4
+        }
+      ]
+    },
+    {
+      "owner": "rustfmt",
+      "pattern": [
+        {
+          "regexp": "^(Diff in (\\S+)) at line (\\d+):",
+          "message": 1,
+          "file": 2,
+          "line": 3
+        }
+      ]
+    }
+  ]
+}