Merge pull request github#7797 from github/hmac/pin-rust

Ruby: Pin Rust to 1.54

Author: hmac

.github/workflows/ruby-build.yml

@@ -50,7 +50,7 @@ jobs:
             ~/.cargo/registry
             ~/.cargo/git
             ruby/target
-          key: ${{ runner.os }}-ruby-rust-cargo-${{ hashFiles('ruby/**/Cargo.lock') }}
+          key: ${{ runner.os }}-ruby-rust-cargo-${{ hashFiles('ruby/rust-toolchain.toml', 'ruby/**/Cargo.lock') }}
       - name: Check formatting
         run: cargo fmt --all -- --check
       - name: Build

ruby/actions/create-extractor-pack/action.yml

@@ -9,7 +9,7 @@ runs:
           ~/.cargo/registry
           ~/.cargo/git
           ruby/target
-        key: ${{ runner.os }}-ruby-qltest-cargo-${{ hashFiles('ruby/**/Cargo.lock') }}
+        key: ${{ runner.os }}-ruby-qltest-cargo-${{ hashFiles('ruby/rust-toolchain.toml', 'ruby/**/Cargo.lock') }}
     - name: Build Extractor
       shell: bash
       run: scripts/create-extractor-pack.sh

ruby/rust-toolchain.toml

@@ -0,0 +1,6 @@
+# This file specifies the Rust version used to develop and test the Ruby
+# extractor. It is set to the lowest version of Rust we want to support.
+
+[toolchain]
+channel = "1.54"
+profile = "default"