Split MSRV in Two Parts (#4204)

* Split MSRV in two parts

* Use toml

* Fix CI

* Update names and cache hits for various jobs

* Comment

.github/workflows/ci.yml

@@ -12,7 +12,11 @@ env:
   CARGO_TERM_COLOR: always
   RUST_LOG: info
   RUST_BACKTRACE: full
-  MSRV: 1.65
+  # This is the MSRV used by `wgpu` itself and all surrounding infrastructure.
+  REPO_MSRV: "1.70"
+  # This is the MSRV used by the `wgpu-core`, `wgpu-hal`, and `wgpu-types` crates,
+  # to ensure that they can be used with firefox.
+  CORE_MSRV: "1.65"
   PKG_CONFIG_ALLOW_CROSS: 1 # allow android to work
   RUSTFLAGS: --cfg=web_sys_unstable_apis -D warnings
   RUSTDOCFLAGS: -Dwarnings
@@ -32,7 +36,7 @@ env:
 # It adds overhead to the build and another point of failure.
 
 jobs:
-  check-msrv:
+  check:
     strategy:
       fail-fast: false
       matrix:
@@ -95,10 +99,11 @@ jobs:
       - name: checkout repo
         uses: actions/checkout@v4
 
-      - name: Install MSRV toolchain
+      - name: Install Repo MSRV toolchain
         run: |
-          rustup toolchain install ${{ env.MSRV }} --no-self-update --profile=minimal --component clippy --target ${{ matrix.target }}
-          rustup default ${{ env.MSRV }}
+          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component clippy --target ${{ matrix.target }}
+          rustup override set ${{ env.REPO_MSRV }}
+          cargo -V
 
       - name: disable debug
         shell: bash
@@ -176,6 +181,64 @@ jobs:
           # build docs
           cargo doc --target ${{ matrix.target }} --all-features --no-deps
 
+  # We run minimal checks on the MSRV of the core crates, ensuring that
+  # its dependency tree does not cause issues for firefox.
+  #
+  # We don't test all platforms, just ones with different dependency stacks.
+  check-core-msrv:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Windows
+          - name: Windows x86_64
+            os: windows-2022
+            target: x86_64-pc-windows-msvc
+
+          # MacOS
+          - name: MacOS x86_64
+            os: macos-12
+            target: x86_64-apple-darwin
+
+          # Linux
+          - name: Linux x86_64
+            os: ubuntu-22.04
+            target: x86_64-unknown-linux-gnu
+
+    name: MSRV Check ${{ matrix.name }}
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: checkout repo
+        uses: actions/checkout@v4
+
+      - name: Install Core MSRV toolchain
+        run: |
+          rustup toolchain install ${{ env.CORE_MSRV }} --no-self-update --profile=minimal --component clippy --target ${{ matrix.target }}
+          rustup override set ${{ env.CORE_MSRV }}
+          cargo -V
+
+      - name: disable debug
+        shell: bash
+        run: |
+          mkdir -p .cargo
+          echo """
+          [profile.dev]
+          debug = false" >> .cargo/config.toml
+
+      - name: caching
+        uses: Swatinem/rust-cache@v2
+        with:
+          key: msrv-check-${{ matrix.target }}-${{ env.CACHE_SUFFIX }}
+
+      - name: check native
+        shell: bash
+        run: |
+          set -e
+
+          # check wgpu-core with all features. This will also get wgpu-hal and wgpu-types.
+          cargo check --target ${{ matrix.target }} --all-features -p wgpu-core
+
   wasm-test:
     name: Test WebAssembly
     runs-on: ubuntu-latest
@@ -183,6 +246,12 @@ jobs:
       - name: checkout repo
         uses: actions/checkout@v4
 
+      - name: Install Repo MSRV toolchain
+        run: |
+          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component clippy --target wasm32-unknown-unknown
+          rustup override set ${{ env.REPO_MSRV }}
+          cargo -V
+
       - name: Install wasm-pack
         uses: taiki-e/install-action@v2
         with:
@@ -213,7 +282,6 @@ jobs:
             os: ubuntu-22.04
             backends: vulkan gl
 
-
     name: Test ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
 
@@ -311,6 +379,12 @@ jobs:
       - name: checkout repo
         uses: actions/checkout@v4
 
+      - name: Install Repo MSRV toolchain
+        run: |
+          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component rustfmt
+          rustup override set ${{ env.REPO_MSRV }}
+          cargo -V
+
       - name: disable debug
         shell: bash
         run: |
@@ -322,7 +396,7 @@ jobs:
       - name: caching
         uses: Swatinem/rust-cache@v2
         with:
-          key: clippy-${{ matrix.target }}-${{ matrix.kind }}-${{ env.CACHE_SUFFIX }}
+          key: doctests-${{ env.CACHE_SUFFIX }}
 
       - name: run doctests
         shell: bash
@@ -338,11 +412,17 @@ jobs:
       - name: checkout repo
         uses: actions/checkout@v4
 
+      - name: Install Repo MSRV toolchain
+        run: |
+          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component rustfmt
+          rustup override set ${{ env.REPO_MSRV }}
+          cargo -V
+
       - name: run rustfmt
         run: |
           cargo fmt -- --check
 
-  check-msrv-cts_runner:
+  check-cts-runner:
     name: Clippy cts_runner
     runs-on: ubuntu-latest
     steps:
@@ -351,8 +431,9 @@ jobs:
 
       - name: Install MSRV toolchain
         run: |
-          rustup toolchain install ${{ env.MSRV }} --no-self-update --profile=minimal --component clippy
-          rustup default ${{ env.MSRV }}
+          rustup toolchain install ${{ env.REPO_MSRV }} --no-self-update --profile=minimal --component clippy
+          rustup override set ${{ env.REPO_MSRV }}
+          cargo -V
 
       - name: disable debug
         shell: bash
@@ -365,14 +446,17 @@ jobs:
       - name: caching
         uses: Swatinem/rust-cache@v2
         with:
-          key: cts_runner-${{ env.CACHE_SUFFIX }}
+          key: cts-runner-${{ env.CACHE_SUFFIX }}
 
       - name: build Deno
         run: |
           cargo clippy --manifest-path cts_runner/Cargo.toml
 
+  # Separate job so that new advisories don't block CI.
+  #
+  # This job is not required to pass for PRs to be merged.
   cargo-deny-check-advisories:
-    name: "Run `cargo deny check advisories`"
+    name: "cargo-deny advisories"
     runs-on: ubuntu-latest
     steps:
       - name: checkout repo
@@ -383,10 +467,10 @@ jobs:
         with:
           command: check advisories
           arguments: --all-features --workspace
-          rust-version: ${{ env.MSRV }}
+          rust-version: ${{ env.REPO_MSRV }}
 
   cargo-deny-check-rest:
-    name: "Run `cargo deny check`"
+    name: "cargo-deny"
     runs-on: ubuntu-latest
     steps:
       - name: checkout repo
@@ -397,4 +481,4 @@ jobs:
         with:
           command: check bans licenses sources
           arguments: --all-features --workspace
-          rust-version: ${{ env.MSRV }}
+          rust-version: ${{ env.REPO_MSRV }}

.github/workflows/cts.yml

@@ -11,7 +11,7 @@ env:
   CARGO_INCREMENTAL: false
   CARGO_TERM_COLOR: always
   RUST_BACKTRACE: full
-  MSRV: 1.65
+  MSRV: "1.70"
 
 jobs:
   cts:
@@ -49,10 +49,11 @@ jobs:
           cd cts
           git checkout $(cat ../wgpu/cts_runner/revision.txt)
 
-      - name: Install MSRV toolchain
+      - name: Install Repo MSRV toolchain
         run: |
           rustup toolchain install ${{ env.MSRV }} --no-self-update --profile=minimal --target ${{ matrix.target }}
-          rustup default ${{ env.MSRV }}
+          rustup override set ${{ env.MSRV }}
+          cargo -V
 
       - name: caching
         uses: Swatinem/rust-cache@v2

Cargo.toml

@@ -26,7 +26,7 @@ default-members = [
 
 [workspace.package]
 edition = "2021"
-rust-version = "1.65"
+rust-version = "1.70"
 keywords = ["graphics"]
 license = "MIT OR Apache-2.0"
 homepage = "https://wgpu.rs/"

examples/timestamp-queries/src/main.rs

@@ -141,7 +141,7 @@ impl Queries {
         encoder.resolve_query_set(
             &self.set,
             // TODO(https://github.com/gfx-rs/wgpu/issues/3993): Musn't be larger than the number valid queries in the set.
-            0..self.next_unused_query as u32,
+            0..self.next_unused_query,
             &self.resolve_buffer,
             0,
         );

rust-toolchain.toml

@@ -5,6 +5,6 @@
 # to the user in the error, instead of "error: invalid channel name '[toolchain]'".
 
 [toolchain]
-channel = "1.65"
+channel = "1.70"
 components = ["rustfmt", "clippy"]
 targets = ["wasm32-unknown-unknown"]

wgpu-core/Cargo.toml

@@ -9,6 +9,12 @@ repository = "https://github.com/gfx-rs/wgpu"
 keywords = ["graphics"]
 license = "MIT OR Apache-2.0"
 
+# Override the workspace's `rust-version` key. Firefox uses `cargo vendor` to
+# copy the crates it actually uses out of the workspace, so it's meaningful for
+# them to have less restrictive MSRVs individually than the workspace as a
+# whole, if their code permits. See `../README.md` for details.
+rust-version = "1.65"
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]

wgpu-hal/Cargo.toml

@@ -13,7 +13,7 @@ license = "MIT OR Apache-2.0"
 # copy the crates it actually uses out of the workspace, so it's meaningful for
 # them to have less restrictive MSRVs individually than the workspace as a
 # whole, if their code permits. See `../README.md` for details.
-rust-version = "1.60"
+rust-version = "1.65"
 
 [package.metadata.docs.rs]
 # Ideally we would enable all the features.

wgpu-types/Cargo.toml

@@ -9,6 +9,12 @@ repository = "https://github.com/gfx-rs/wgpu"
 keywords = ["graphics"]
 license = "MIT OR Apache-2.0"
 
+# Override the workspace's `rust-version` key. Firefox uses `cargo vendor` to
+# copy the crates it actually uses out of the workspace, so it's meaningful for
+# them to have less restrictive MSRVs individually than the workspace as a
+# whole, if their code permits. See `../README.md` for details.
+rust-version = "1.65"
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]