koh 0.7.0

koh — a resilient peer-to-peer remote shell: mosh, rewritten in Rust over iroh
Documentation
name: CI

on:
  push:
    branches: [main]
  pull_request:
  schedule:
    # Weekly (Mon 06:00 UTC): re-run the advisory scan so a newly-disclosed CVE against the
    # deliberately `=`-pinned dependency tree surfaces even with no code change.
    - cron: "0 6 * * 1"

# Cancel superseded runs on the same ref.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always

jobs:
  # The same green gate enforced locally: format, lints, and the full test suite.
  gate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy, rustfmt
      - uses: Swatinem/rust-cache@v2
      - name: rustfmt
        run: cargo fmt --all --check
      - name: clippy
        run: cargo clippy --all-targets --locked
      - name: layering guard
        # Enforce the two load-bearing dependency edges the architecture relies on (AR-02). Greps
        # the `use crate::` import form only, so doc-comment rustdoc links can't false-positive.
        run: |
          if grep -rnE '^[[:space:]]*use crate::' src/predict.rs; then
            echo "::error::predict.rs must import nothing from crate:: — keep it a standalone vt100-only library"
            exit 1
          fi
          if grep -rnE '^[[:space:]]*use crate::wire' src/server src/client; then
            echo "::error::server/client must not 'use crate::wire' directly — reach the wire through ssp::Transport"
            exit 1
          fi
          echo "layering edges OK"
      - name: test
        run: cargo test --locked
      - name: docs (deny broken intra-doc links)
        # Catches workspace-era / renamed intra-doc links before they ship a broken docs.rs build.
        run: cargo doc --no-deps --locked
        env:
          RUSTDOCFLAGS: "-D rustdoc::broken_intra_doc_links"

  # Supply-chain tripwire: the `=` pins buy reproducibility, so this is what keeps them from
  # silently aging into a CVE. Advisory ignores (and the rationale) live in deny.toml.
  advisories:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: EmbarkStudios/cargo-deny-action@v2
        with:
          command: check advisories

  # Coverage-guided fuzzing of the untrusted-input decode surfaces (the OpenSSH/OSS-Fuzz doctrine:
  # one harness per attacker-reachable parser). Builds the harnesses, then a short smoke run that
  # MUST stay crash-free — `screen_apply` proves the vt100 panic containment holds, `wire_decode`
  # proves the wire decoders only Err (never panic) on arbitrary bytes.
  fuzz:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@nightly
      - uses: Swatinem/rust-cache@v2
      - name: install cargo-fuzz
        run: cargo install cargo-fuzz --locked
      - name: build fuzz targets
        run: cargo +nightly fuzz build
      - name: smoke (must stay crash-free)
        run: |
          cargo +nightly fuzz run screen_apply -- -max_total_time=45 -rss_limit_mb=4096
          cargo +nightly fuzz run wire_decode  -- -max_total_time=45 -rss_limit_mb=4096