ci: make Gitea primary Linux forge

.gitea/workflows/ci.yml

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+name: Rust CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  fmt:
+    name: cargo fmt
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1
+        with:
+          components: rustfmt
+          cache: false
+
+      - name: Check formatting
+        uses: actions-rust-lang/rustfmt@4066006ec54a31931b9b1fddfd38f2fdf2d27143 # v1
+
+  clippy:
+    name: cargo clippy
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1
+        with:
+          components: clippy
+          cache: false
+
+      - name: Run clippy
+        run: |
+          cargo clippy \
+            --workspace \
+            --all-targets \
+            --all-features \
+            --locked \
+            -- -D warnings
+
+      - name: Run clippy without default features
+        run: |
+          cargo clippy \
+            --workspace \
+            --all-targets \
+            --no-default-features \
+            --locked \
+            -- -D warnings
+
+  verify:
+    name: cargo ${{ matrix.task }} (${{ matrix.target }})
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - task: check
+            target: x86_64-unknown-linux-gnu
+            musl: false
+
+          - task: test
+            target: x86_64-unknown-linux-gnu
+            musl: false
+
+          - task: check
+            target: x86_64-unknown-linux-musl
+            musl: true
+
+          - task: test
+            target: x86_64-unknown-linux-musl
+            musl: true
+
+    runs-on: ubuntu-latest
+    timeout-minutes: 25
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install musl toolchain
+        if: matrix.musl
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends musl-tools
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1
+        with:
+          target: ${{ matrix.target }}
+          cache: false
+
+      - name: Run ${{ matrix.task }} with all features
+        run: |
+          cargo ${{ matrix.task }} \
+            --workspace \
+            --all-targets \
+            --all-features \
+            --target ${{ matrix.target }} \
+            --locked
+
+      - name: Run ${{ matrix.task }} without default features
+        run: |
+          cargo ${{ matrix.task }} \
+            --workspace \
+            --all-targets \
+            --no-default-features \
+            --target ${{ matrix.target }} \
+            --locked
+
+  docs:
+    name: cargo doc
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    env:
+      RUSTDOCFLAGS: "-D warnings"
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1
+        with:
+          cache: false
+
+      - name: Check docs
+        run: |
+          cargo doc \
+            --workspace \
+            --all-features \
+            --no-deps \
+            --locked

.gitea/workflows/fuzz.yml

@@ -0,0 +1,67 @@
+name: Proto Fuzz Smoke
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+  # Pinned for reproducibility; bump deliberately alongside `fuzz/Cargo.lock`.
+  CARGO_FUZZ_VERSION: 0.13.1
+
+jobs:
+  fuzz-smoke:
+    name: cargo fuzz smoke
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install stable Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1
+        with:
+          cache: false
+
+      - name: Install nightly Rust toolchain
+        # Installed alongside, but deliberately not made the directory
+        # default: cargo-fuzz itself is built with the default stable
+        # toolchain below, and only `fuzz build`/`fuzz run` are run with
+        # `+nightly`. Building cargo-fuzz's own dependency tree under a
+        # nightly override can trip build scripts (e.g. rustix) that gate
+        # unstable internal attributes on detecting a nightly compiler.
+        run: rustup toolchain install nightly --profile minimal --no-self-update
+
+      - name: Install cargo-fuzz
+        run: cargo install cargo-fuzz --locked --version "${CARGO_FUZZ_VERSION}"
+
+      - name: Build all fuzz targets
+        run: cargo +nightly fuzz build
+        working-directory: fuzz
+
+      - name: Run bounded fuzz smoke for every target
+        # A single job building once and running each target sequentially
+        # avoids recompiling the fuzz workspace per target. Ten seconds per
+        # target is enough to catch a broken harness or an obvious
+        # regression; this is not meant to be exhaustive fuzzing.
+        run: |
+          set -euo pipefail
+          for target in decode_request decode_open_reply decode_echo_reply decode_params decode_varint; do
+            echo "::group::fuzz smoke: ${target}"
+            cargo +nightly fuzz run "${target}" -- \
+              -max_total_time=10 \
+              -timeout=5
+            echo "::endgroup::"
+          done
+        working-directory: fuzz

.gitea/workflows/interop-netem.yml

@@ -0,0 +1,76 @@
+name: Netem Interop
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+  GOBIN: ${{ github.workspace }}/.tools/bin
+  IRTT_UPSTREAM_VERSION: v0.9.1
+
+jobs:
+  netem:
+    name: netem interop
+    runs-on: ubuntu-latest
+    timeout-minutes: 25
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1
+        with:
+          cache: false
+
+      - name: Check host tools and network administration access
+        run: |
+          ip -V
+          tc -V
+          go version
+          sudo -n true
+
+      - name: Install upstream irtt
+        run: |
+          mkdir -p "$GOBIN"
+          go install "github.com/heistp/irtt/cmd/irtt@${IRTT_UPSTREAM_VERSION}"
+          "$GOBIN/irtt" version
+
+      - name: Build irtt-rs client
+        run: cargo build -p irtt-rs --bin irtt-client --locked
+
+      - name: Run netem interop comparisons
+        run: |
+          python3 scripts/run_netem_interop_ci.py \
+            --all \
+            --skip-build \
+            --upstream-irtt "$GOBIN/irtt" \
+            --irtt-rs-command "$PWD/target/debug/irtt-client"
+
+      - name: Append netem interop summary
+        if: always()
+        run: |
+          latest_summary="$(find target/interop-netem -mindepth 2 -maxdepth 2 -name github-step-summary.md -type f -print 2>/dev/null | sort | tail -n 1)"
+          if [ -n "$latest_summary" ]; then
+            cat "$latest_summary" >> "$GITEA_STEP_SUMMARY"
+          else
+            echo "No netem interop github-step-summary.md found." >> "$GITEA_STEP_SUMMARY"
+          fi
+
+      - name: Upload netem interop artifacts
+        if: always()
+        uses: https://gitea.com/actions/gitea-upload-artifact@v7
+        with:
+          name: interop-netem
+          path: target/interop-netem

.gitea/workflows/semver.yml

@@ -0,0 +1,40 @@
+name: Semver
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - "irtt-proto/v*.*.*"
+      - "irtt-client/v*.*.*"
+      - "irtt-server/v*.*.*"
+      - "irtt-stats/v*.*.*"
+      - "irtt-rs/v*.*.*"
+
+permissions:
+  contents: read
+
+jobs:
+  semver:
+    name: cargo-semver-checks
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1
+        with:
+          cache: false
+
+      # The action wrapper downloads through the GitHub API and uses the
+      # GitHub cache service. The underlying CLI is portable and preserves
+      # the existing wrapper's `feature-group: all-features` behavior.
+      - name: Install cargo-semver-checks
+        run: cargo install cargo-semver-checks --locked
+
+      - name: Check semver compatibility
+        run: cargo semver-checks check-release --all-features

.gitea/workflows/supply-chain.yml

@@ -0,0 +1,87 @@
+name: Supply chain
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: "41 2 * * 1"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  ACTIONLINT_VERSION: 1.7.7
+
+jobs:
+  cargo-deny:
+    name: cargo-deny ${{ matrix.checks }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Advisories can appear after code was merged. Keep this visible,
+          # but don't let a surprise upstream advisory nuke every unrelated PR.
+          - checks: advisories
+            continue-on-error: true
+
+          # These are policy choices in this repo. They should block PRs.
+          - checks: bans licenses sources
+            continue-on-error: false
+
+    continue-on-error: ${{ matrix.continue-on-error }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Run cargo-deny
+        uses: EmbarkStudios/cargo-deny-action@3c6349835b2b7b196a839186cb8b78e02f7b5f25 # v2
+        with:
+          command: check
+          arguments: --all-features
+          command-arguments: ${{ matrix.checks }}
+
+  actionlint:
+    name: actionlint
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Install actionlint
+        run: go install github.com/rhysd/actionlint/cmd/actionlint@v${ACTIONLINT_VERSION}
+
+      - name: actionlint handwritten workflows
+        # actionlint validates GitHub Actions syntax. It cannot parse Gitea's
+        # required absolute action URL in interop-netem.yml, so that workflow
+        # is checked by the Gitea runner instead.
+        run: |
+          "$(go env GOPATH)/bin/actionlint" \
+            .gitea/workflows/ci.yml \
+            .gitea/workflows/docker-publish.yml \
+            .gitea/workflows/fuzz.yml \
+            .gitea/workflows/semver.yml \
+            .gitea/workflows/supply-chain.yml \
+            .github/workflows/actions-security.yml \
+            .github/workflows/ci-arm.yml \
+            .github/workflows/osv-scanner.yml \
+            .github/workflows/rust-clippy.yml
+
+      - name: actionlint generated release workflow
+        run: >-
+          "$(go env GOPATH)/bin/actionlint" -shellcheck=
+          .github/workflows/irtt-rs-release.yml