name: C Header File
on:
  push:
    branches:
      - main
  pull_request:

permissions:
  contents: read

# Cancel the workflow if a new one is triggered from the same PR, branch, or tag, except on main.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}

jobs:
  c-header-file:
    name: "C Header File"
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

    - uses: actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af # v1.0.7
      with:
        toolchain: stable

    - name: Build the library and generate the C header file
      run: cargo build --features capi --release --no-default-features

    - name: Ensure that there is no diff in the header file.
      run: git diff --exit-code include/avif/avif.h