ci: add CI with Github Actions

.github/workflows/ci.yml

@@ -0,0 +1,63 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  report:
+    needs:
+      - lint-aux
+      - rustfmt
+      - clippy
+      - build-and-test
+    if: always()
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Report success
+        if: "!contains(needs.*.result, 'failure') && !contains(needs.*.result, 'cancelled')"
+        run: exit 0
+      - name: Report failure
+        if: "contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled')"
+        run: exit 1
+
+  lint-aux:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: ./ci/install-lint-deps.sh
+      - name: Run auxilary lints
+        run: ./ci/lint-aux.sh
+
+  rustfmt:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust
+        run: ./ci/install-rust.sh stable.txt --profile minimal -c rustfmt
+      - name: Run rustfmt
+        run: cargo fmt --all -- --check
+
+  clippy:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust
+        run: ./ci/install-rust.sh stable.txt --profile minimal -c clippy
+      - name: Run clippy
+        run: ./ci/clippy.sh
+
+  build-and-test:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        include:
+          - rust-version: msrv.txt
+          - rust-version: stable.txt
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust
+        run: ./ci/install-rust.sh "${{ matrix.rust-version }}" --profile minimal
+      - name: Build and test
+        run: ./ci/build-and-test.sh

ci/build-and-test.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+export RUSTDOCFLAGS="-D warnings"
+
+cargo fetch --locked
+
+cargo build --workspace --all-targets --frozen
+cargo test --workspace --frozen
+cargo doc --workspace --frozen

ci/clippy.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cargo fetch --locked
+cargo clippy --workspace --all-targets --frozen -- -D warnings

ci/install-lint-deps.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+sudo apt-get update
+sudo apt-get install -y --no-install-recommends shellcheck
+
+sudo gem install mdl

ci/install-rust.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+rust_version="$1"
+shift
+
+if [[ "$rust_version" = *.txt ]]; then
+  rust_version="$(cat "ci/rust-versions/$rust_version")"
+fi
+
+echo "Installing Rust $rust_version"
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain "$rust_version" "$@"
+echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

ci/lint-aux.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+echo "Checking MSRV consistency"
+
+msrv="$(cat ci/rust-versions/msrv.txt)"
+msrv="${msrv%.*}"
+
+if [ "$(grep rust-version Cargo.toml)" != "rust-version = \"$msrv\"" ]; then
+  echo "Incorrect rust-version in Cargo.toml"
+  exit 1
+fi
+
+echo "Checking shell scripts with shellcheck"
+find . -type f -name "*.sh" -not -path "./.git/*" -print0 | xargs -0 shellcheck
+
+echo "Checking markdown documents with markdownlint"
+find . -type f -name "*.md" -not -path "./.git/*" -print0 | xargs -0 mdl

ci/rust-versions/msrv.txt

@@ -0,0 +1 @@
+1.74.0

ci/rust-versions/stable.txt

@@ -0,0 +1 @@
+1.77.0