Fix msrv CI: Check for --all-features (#890)

* Fix msrv CI: Check for `--all-features` and macos

To make sure that enabling `parallel` feature would not require bumping
msrv.

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* Use minimal-versions and fetch deps crates using stable

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* Fix fetching deps in msrv

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* Cache downlaoded crates since 1.46 is really slow in fetching

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* Skip msrv for macos-latest since newer xcode breaks 1.46 linking

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* CI: Disable fail-fast for msrv check

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* CI: Add feature to cache key of msrv

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* CI: Rm matrix features of msrv

Since most of the time is spent on installing Rust, there's no point in
parallelizing it.

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

---------

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

Author: NobodyXu

.github/workflows/main.yml

@@ -114,16 +114,23 @@ jobs:
     name: MSRV
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
     steps:
     - uses: actions/checkout@v4
     - name: Install Rust
       run: |
         rustup toolchain install 1.46.0 --no-self-update --profile minimal
+        rustup toolchain install nightly --no-self-update --profile minimal
         rustup default 1.46.0
       shell: bash
+    - name: Create Cargo.lock with minimal version
+      run: cargo +nightly update -Zminimal-versions
+    - name: Cache downloaded crates since 1.46 is really slow in fetching
+      uses: Swatinem/rust-cache@v2
     - run: cargo check --lib
+    - run: cargo check --lib --all-features
 
   rustfmt:
     name: Rustfmt