no-emdash.yml

name: No em dashes

# Fails a PR that introduces an em dash (U+2014) or en dash (U+2013) into any tracked text file. The repo style forbids
# them: use a colon, or reword the sentence, instead (see CLAUDE.md). A spaced ASCII hyphen stand-in is banned too, caught by
# tools/dash-lint. This check is a fast grep over tracked files, so
# it runs unconditionally rather than behind a changed-paths gate: an em dash can land in any text file, not a fixed set.

on:
  push:
    branches: [main]
  pull_request:
  workflow_dispatch:

permissions: {}

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  no-emdash:
    name: No em dashes
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
        with:
          go-version-file: go.mod
          cache: false

      - name: Check for em/en dashes in tracked files
        run: bash tools/lint-no-emdash.sh

      - name: Check for spaced-hyphen em dashes in prose, comments, and strings
        run: git ls-files -z | go run ./tools/dash-lint