tisonkun commented on code in PR #13:
URL: https://github.com/apache/datasketches-rust/pull/13#discussion_r2618836255


##########
.github/workflows/ci.yml:
##########
@@ -0,0 +1,122 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+name: CI
+on:
+  pull_request:
+    branches: [ main ]
+  push:
+    branches: [ main ]
+
+# Concurrency strategy:
+#   github.workflow: distinguish this workflow from others
+#   github.event_name: distinguish `push` event from `pull_request` event
+#   github.event.number: set to the number of the pull request if 
`pull_request` event
+#   github.run_id: otherwise, it's a `push` event, only cancel if we rerun the 
workflow
+#
+# Reference:
+#   https://docs.github.com/en/actions/using-jobs/using-concurrency
+#   
https://docs.github.com/en/actions/learn-github-actions/contexts#github-context
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ 
github.event.number || github.run_id }}
+  cancel-in-progress: true
+jobs:
+  check:
+    name: Check
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+      - name: Delete rust-toolchain.toml
+        run: rm rust-toolchain.toml
+      - name: Install toolchain
+        uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rustfmt,clippy
+      - uses: Swatinem/rust-cache@v2
+      - uses: taiki-e/install-action@v2
+        with:
+          tool: typos-cli,taplo-cli,hawkeye
+      - name: Check all
+        run: |
+          hawkeye check
+          taplo format --check
+          typos
+          cargo +nightly fmt --all -- --check
+          cargo +nightly clippy --all-targets --all-features -- -D warnings
+
+  msrv:
+    name: Resolve MSRV
+    runs-on: ubuntu-24.04
+    outputs:
+      rust-versions: ${{ steps.metadata.outputs.rust-versions }}
+    steps:
+      - uses: actions/checkout@v6
+      - name: Delete rust-toolchain.toml
+        run: rm rust-toolchain.toml
+      - name: Install toolchain
+        uses: dtolnay/rust-toolchain@nightly
+      - id: metadata
+        run: |
+          msrv=$(cargo metadata --format-version 1 --no-deps | jq -r 
'.packages[] | select(.name == "datasketches") | .rust_version')
+          echo "MSRV: $msrv"
+          echo "rust-versions=[\"${msrv}\", \"stable\"]" >> "$GITHUB_OUTPUT"

Review Comment:
   Use `yq` over `cargo metadata` since `cargo metadata` can hardly tell what 
is "our crate". (You must hardcode the crate name as above)
   
   ```
   msrv=$(yq '.package.rust-version' Cargo.toml)
   ```
   
   Directly read from Cargo.toml. The only ceveat is that if later we move to a 
workspace setup, it would be `msrv=$(yq '.workspace.package.rust-version' 
Cargo.toml)` like what I'm testing on https://github.com/fast/logforth/pull/203.



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