Move CI to rust-cache Action

.github/workflows/ci.yaml

@@ -42,14 +42,6 @@ jobs:
       if: matrix.os == 'windows-latest'
       run: Rename-Item C:\Users\runneradmin\.rustup\toolchains\stable-x86_64-pc-windows-msvc C:\Users\runneradmin\.rustup\toolchains\stable-x86_64-pc-windows-msvc.old
 
-    # Work around https://github.com/actions/cache/issues/403 by using GNU tar
-    # instead of BSD tar.
-    - name: Install GNU tar
-      if: matrix.os == 'macos-latest'
-      run: |
-        brew install gnu-tar
-        echo PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH" >> $GITHUB_ENV
-
     - name: Install Rust toolchain
       uses: actions-rs/toolchain@v1
       with:
@@ -58,29 +50,15 @@ jobs:
         override: true
         components: rustfmt, rust-src
 
-    - name: Cache cargo directories
-      uses: actions/cache@v2
-      with:
-        path: |
-          ~/.cargo/registry
-          ~/.cargo/git
-        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-
-    - name: Cache cargo target dir
-      uses: actions/cache@v2
-      with:
-        path: target
-        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+    - name: Cache Dependencies
+      uses: Swatinem/rust-cache@ce325b60658c1b38465c06cc965b79baf32c1e72
 
     - name: Compile
       run: cargo test --no-run --locked
 
     - name: Test
       run: cargo test
 
-    - name: Prepare cache
-      run: cargo xtask pre-cache
-
   # Weird targets to catch non-portable code
   rust-cross:
     name: Rust Cross
@@ -103,13 +81,8 @@ jobs:
     - name: Install Rust targets
       run: rustup target add ${{ env.targets }}
 
-    - name: Cache cargo directories
-      uses: actions/cache@v2
-      with:
-        path: |
-          ~/.cargo/registry
-          ~/.cargo/git
-        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+    - name: Cache Dependencies
+      uses: Swatinem/rust-cache@ce325b60658c1b38465c06cc965b79baf32c1e72
 
     - name: Check
       run: |

xtask/src/flags.rs

@@ -28,7 +28,6 @@ xflags::xflags! {
         }
 
         cmd fuzz-tests {}
-        cmd pre-cache {}
 
         cmd release {
             optional --dry-run
@@ -63,7 +62,6 @@ pub enum XtaskCmd {
     Help(Help),
     Install(Install),
     FuzzTests(FuzzTests),
-    PreCache(PreCache),
     Release(Release),
     Promote(Promote),
     Dist(Dist),
@@ -91,9 +89,6 @@ pub struct Lint;
 #[derive(Debug)]
 pub struct FuzzTests;
 
-#[derive(Debug)]
-pub struct PreCache;
-
 #[derive(Debug)]
 pub struct Release {
     pub dry_run: bool,

xtask/src/main.rs

@@ -18,7 +18,6 @@ mod install;
 mod release;
 mod dist;
 mod metrics;
-mod pre_cache;
 
 use anyhow::{bail, Result};
 use std::{
@@ -41,7 +40,6 @@ fn main() -> Result<()> {
         }
         flags::XtaskCmd::Install(cmd) => cmd.run(),
         flags::XtaskCmd::FuzzTests(_) => run_fuzzer(),
-        flags::XtaskCmd::PreCache(cmd) => cmd.run(),
         flags::XtaskCmd::Release(cmd) => cmd.run(),
         flags::XtaskCmd::Promote(cmd) => cmd.run(),
         flags::XtaskCmd::Dist(flags) => {