Add Rust MSRV

.github/workflows/ci.yml

@@ -45,6 +45,19 @@ jobs:
           --feature-powerset
           --skip yield,thread_local
 
+  msrv:
+    name: MSRV
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Install Rust 1.65.0
+        run: rustup toolchain install 1.65.0
+      - name: Set Rust 1.65.0 as default
+        run: rustup default 1.65.0
+      - name: Check MSRV
+        run: cargo check --all-features
+
   docs:
     name: Docs
     runs-on: ubuntu-latest

Makefile.toml

@@ -21,6 +21,13 @@ command = "cargo"
 env = { "RUSTDOCFLAGS" = "--cfg docsrs" }
 args = ["doc", "--all-features", "--open"]
 
+# Check MSRV.
+[tasks.msrv]
+toolchain = "1.65.0"
+command = "cargo"
+# TODO: add `--all` for benches.
+args = ["check", "--all-features"]
+
 # Lint all feature combinations with cargo-hack.
 [tasks.lint]
 command = "cargo"
@@ -42,6 +49,11 @@ install_crate = { rustup_component_name = "miri" }
 command = "cargo"
 args = ["miri", "test", "--all-features", "${@}"]
 
+# Check code coverage with tarpaulin (all features).
+[tasks.tarpaulin]
+command = "cargo"
+args = ["tarpaulin", "--all-features", "--engine", "llvm", "--out", "xml"]
+
 # Run Loom tests.
 [tasks.loom-test]
 command = "cargo"
@@ -52,7 +64,7 @@ args = ["test", "--lib", "--release", "--all-features", "${@}"]
 [tasks.loom-check]
 command = "cargo"
 env = { "RUSTFLAGS" = "${CFG_LOOM}" }
-args = ["check", "--profile", "test", "--all-features", "${@}"]
+args = ["check", "--profile", "test", "--all-features"]
 
 # Lint all feature combinations with cargo-hack on test profile and Loom cfg.
 [tasks.loom-lint]

README.md

@@ -177,6 +177,14 @@ This feature implements the [`RawMutex`] trait from the [lock_api] crate for
 `barging::Mutex`. Aliases are provided by the `lock_api` module. This feature
 is `no_std` compatible.
 
+## Minimum Supported Rust Version (MSRV)
+
+This crate is guaranteed to compile on a Minimum Supported Rust Version (MSRV)
+of 1.65.0 and above. This version will not be changed without a minor version
+bump. If you intend to use this crate but can only target a older Rust version,
+feel free to open a issue with your specific target, it is possible to lower
+this crate MSRV substantially, it just has not been explored yet.
+
 ## Related projects
 
 These projects provide MCS lock implementations with slightly different APIs,

src/lib.rs

@@ -189,6 +189,7 @@
 #![allow(clippy::module_name_repetitions)]
 #![allow(clippy::inline_always)]
 #![allow(clippy::doc_markdown)]
+#![warn(rust_2021_compatibility)]
 #![warn(missing_docs)]
 
 pub mod raw;