Add composite action to CI (#392)

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

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+name: 'rust-setup'
+description: 'Prepares a rust environment and relevant caches.'
+inputs:
+  sccache-path:
+    description: 'Path of the sccache.'
+    required: true
+  os:
+    description: 'OS of the runner, used for cache key construction.'
+    required: true
+  job:
+    description: 'Name of the job, used for cache key construction.'
+    required: true
+  current-date:
+    description: 'Current date, used for cache key construction.'
+    required: true
+  target-cache-path:
+    description: 'Path of the target cache.'
+    required: false
+    default: target
+runs:
+  using: "composite"
+  steps:
+    - name: Install stable toolchain
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        override: true
+
+    - name: Cache cargo
+      uses: actions/cache@v2.1.4
+      with:
+        # https://doc.rust-lang.org/cargo/guide/cargo-home.html#caching-the-cargo-home-in-ci
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+        # Add date to the cache to keep it up to date
+        key: ${{ inputs.os }}-cargo-${{ inputs.job }}-${{ hashFiles('**/Cargo.toml') }}-${{ inputs.current-date }}
+        # Restore from outdated cache for speed
+        restore-keys: |
+          ${{ inputs.os }}-cargo-${{ inputs.job }}-${{ hashFiles('**/Cargo.toml') }}-
+          ${{ inputs.os }}-cargo-${{ inputs.job }}-
+          ${{ inputs.os }}-cargo-
+
+    # Generate Cargo.lock files for build, sccache cache keys.
+    # Allows dependencies updated on crates.io between runs to trigger storing an updated cache,
+    # which hashing Cargo.toml files alone does not.
+    - name: Cargo update
+      uses: actions-rs/cargo@v1
+      with:
+        command: update
+
+    - name: Cache build target
+      uses: actions/cache@v2.1.4
+      with:
+        path: ${{ inputs.target-cache-path }}
+        # Add date to the cache to keep it up to date
+        key: ${{ inputs.os }}-target-${{ inputs.job }}-${{ hashFiles('**/Cargo.lock') }}
+        # Restore from outdated cache for speed
+        restore-keys: |
+          ${{ inputs.os }}-target-${{ inputs.job }}-
+          ${{ inputs.os }}-target-
+
+    - name: Cache sccache
+      uses: actions/cache@v2.1.6
+      with:
+          path: ${{ inputs.sccache-path }}
+          key: ${{ inputs.os }}-sccache-${{ inputs.job }}-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ inputs.os }}-sccache-${{ inputs.job }}-
+            ${{ inputs.os }}-sccache-

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

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+name: 'setup-sccache-macos'
+description: 'Setup sccache for macos.'
+runs:
+  using: "composite"
+  steps:
+    - name: Install sccache (macos-latest)
+      shell: sh
+      run: |
+        brew update --preinstall
+        brew install sccache
+        
+    - name: Start sccache
+      shell: sh
+      run: |
+        sccache --start-server
+        sccache -s

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

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+name: 'setup-sccache-ubuntu'
+description: 'Setup sccache for ubuntu.'
+runs:
+  using: "composite"
+  steps:
+    - name: Install sccache (macos-latest)
+      shell: sh
+      run: |
+        SCCACHE_DOWNLOAD_LINK=https://github.com/mozilla/sccache/releases/download
+        SCCACHE_VERSION=v0.2.15
+        SCCACHE_PREFIX="sccache-$SCCACHE_VERSION-x86_64-unknown-linux-musl"
+        SCCACHE_TAR="${SCCACHE_PREFIX}.tar.gz"
+        DOWNLOAD_LINK="${SCCACHE_DOWNLOAD_LINK}/${SCCACHE_VERSION}/${SCCACHE_TAR}"
+        curl -L "${DOWNLOAD_LINK}" --output ${SCCACHE_TAR}
+        echo "$(curl -L ${DOWNLOAD_LINK}.sha256)  ${SCCACHE_TAR}" | shasum -a 256 --check --status
+        tar xzf ${SCCACHE_TAR}
+        BIN_DIR="$HOME/.local/bin"
+        mkdir -p ${BIN_DIR}
+        mv -f ${SCCACHE_PREFIX}/sccache ${BIN_DIR}/sccache
+        chmod a+x "${BIN_DIR}/sccache"
+        echo ${BIN_DIR} >> $GITHUB_PATH
+        
+    - name: Start sccache
+      shell: sh
+      run: |
+        sccache --start-server
+        sccache -s

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

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+name: 'setup-sccache-windows'
+description: 'Setup sccache for windows.'
+runs:
+  using: "composite"
+  steps:
+    - name: Install sccache (windows-latest)
+      shell: pwsh
+      run: |
+        Invoke-Expression (New-Object System.Net.WebClient).DownloadString('https://get.scoop.sh')
+        scoop install sccache
+        echo "${HOME}/scoop/apps/sccache/current" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+    
+    - name: Start sccache
+      shell: pwsh
+      run: |
+        sccache --start-server
+        sccache -s

.github/actions/rust/sccache/stop-sccache-ubuntu-macos/action.yml

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+name: 'stop-sccache-ubuntu-macos'
+description: 'Stop sccache on ubuntu and macos.'
+runs:
+  using: "composite"
+  steps:
+    - name: Stop sccache server
+      shell: sh
+      run: sccache --stop-server || true

.github/actions/rust/sccache/stop-sccache-windows/action.yml

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+name: 'stop-sccache-windows'
+description: 'Stop sccache on windows.'
+runs:
+  using: "composite"
+  steps:
+    - name: Stop sccache server
+      shell: pwsh
+      run: sccache --stop-server || true

.github/actions/utils/get-current-date-ubuntu-macos/action.yml

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+name: 'get-current-date-ubuntu-macos'
+description: 'Script for getting the current date on ubuntu and macos.'
+runs:
+  using: "composite"
+  steps:
+    - name: Get current date
+      shell: sh
+      run: echo "CURRENT_DATE=$(date +'%Y-%m-%d')" >> $GITHUB_ENV

.github/actions/utils/get-current-date-windows/action.yml

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+name: 'get-current-date-windows'
+description: 'Script for getting the current date on windows.'
+runs:
+  using: "composite"
+  steps:
+    - name: Get current date
+      shell: pwsh
+      run: echo "CURRENT_DATE=$(Get-Date -Format "yyyy-MM-dd")" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append