try to use rust-cache on github action to build faster

.github/workflows/CICD.yml

@@ -5,7 +5,7 @@ name: CICD
 # spell-checker:ignore (jargon) SHAs deps dequote softprops subshell toolchain
 # spell-checker:ignore (names) CodeCOV MacOS MinGW Peltoche rivy
 # spell-checker:ignore (shell/tools) choco clippy dmake dpkg esac fakeroot gmake grcov halium lcov libssl mkdir popd printf pushd rsync rustc rustfmt rustup shopt xargs
-# spell-checker:ignore (misc) aarch alnum armhf bindir busytest coreutils gnueabihf issuecomment maint nullglob onexitbegin onexitend pell runtest tempfile testsuite uutils DESTDIR sizemulti
+# spell-checker:ignore (misc) aarch alnum armhf bindir busytest coreutils gnueabihf issuecomment maint nullglob onexitbegin onexitend pell runtest tempfile testsuite uutils DESTDIR sizemulti Swatinem
 
 # ToDO: [2021-06; rivy] change from `cargo-tree` to `cargo tree` once MSRV is >= 1.45
 
@@ -37,6 +37,7 @@ jobs:
           - { os: windows-latest , features: feat_os_windows }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize workflow variables
       id: vars
       shell: bash
@@ -94,6 +95,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize workflow variables
       id: vars
       shell: bash
@@ -157,6 +159,7 @@ jobs:
           - { os: windows-latest , features: feat_os_windows }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize workflow variables
       id: vars
       shell: bash
@@ -214,6 +217,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize workflow variables
       id: vars
       shell: bash
@@ -265,6 +269,7 @@ jobs:
 #          - { os: windows-latest , features: feat_os_windows }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize workflow variables
       id: vars
       shell: bash
@@ -309,6 +314,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize workflow variables
       id: vars
       shell: bash
@@ -385,6 +391,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Install `rust` toolchain
       uses: actions-rs/toolchain@v1
       with:
@@ -409,6 +416,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Install `rust` toolchain
       uses: actions-rs/toolchain@v1
       with:
@@ -436,6 +444,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Install dependencies
       shell: bash
       run: |
@@ -497,6 +506,7 @@ jobs:
           - { os: windows-latest , target: x86_64-pc-windows-msvc      , features: feat_os_windows }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize workflow variables
       id: vars
       shell: bash
@@ -745,6 +755,7 @@ jobs:
           - { os: ubuntu-latest }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Install/setup prerequisites
       shell: bash
       run: |
@@ -780,6 +791,7 @@ jobs:
       mem: 2048
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Prepare, build and test
       ## spell-checker:ignore (ToDO) sshfs usesh vmactions
       uses: vmactions/freebsd-vm@v0.1.5
@@ -848,6 +860,7 @@ jobs:
           - { os: windows-latest , features: windows }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     # - name: Reattach HEAD ## may be needed for accurate code coverage info
     #   run: git checkout ${{ github.head_ref }}
     - name: Initialize workflow variables

.github/workflows/FixPR.yml

@@ -1,5 +1,7 @@
 name: FixPR
 
+# spell-checker:ignore Swatinem
+
 # Trigger automated fixes for PRs being merged (with associated commits)
 
 # ToDO: [2021-06; rivy] change from `cargo-tree` to `cargo tree` once MSRV is >= 1.45
@@ -27,6 +29,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize job variables
       id: vars
       shell: bash
@@ -98,6 +101,7 @@ jobs:
           - { os: ubuntu-latest , features: feat_os_unix }
     steps:
     - uses: actions/checkout@v2
+    - uses: Swatinem/rust-cache@v1
     - name: Initialize job variables
       id: vars
       shell: bash