Add Homebrew tap automation and bump to 0.3.1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: lightsofapollo

.github/workflows/release.yml

@@ -323,3 +323,21 @@ jobs:
 
       - name: Publish package
         run: npm publish --access public
+
+  update-homebrew:
+    name: Update Homebrew tap
+    runs-on: ubuntu-latest
+    needs: publish-release
+    if: startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.ref_name }}
+
+      - name: Update tap formula
+        env:
+          GH_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}
+        run: |
+          VERSION="${GITHUB_REF_NAME#v}"
+          ./homebrew/update-tap.sh "$VERSION"

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "attn"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2024"
 description = "A beautiful markdown viewer that launches from the CLI"
 license = "MIT"

Cargo.toml

@@ -0,0 +1,33 @@
+class Attn < Formula
+  desc "A beautiful markdown viewer that launches from the CLI"
+  homepage "https://github.com/lightsofapollo/attn"
+  license "MIT"
+  version "%%VERSION%%"
+
+  on_macos do
+    on_arm do
+      url "https://github.com/lightsofapollo/attn/releases/download/v#{version}/attn-v#{version}-darwin-arm64"
+      sha256 "%%SHA256_DARWIN_ARM64%%"
+    end
+  end
+
+  on_linux do
+    on_intel do
+      url "https://github.com/lightsofapollo/attn/releases/download/v#{version}/attn-v#{version}-linux-x64"
+      sha256 "%%SHA256_LINUX_X64%%"
+    end
+  end
+
+  def install
+    downloaded = Dir["attn-v*"].first
+    if downloaded
+      mv downloaded, "attn"
+    end
+    chmod 0755, "attn"
+    bin.install "attn"
+  end
+
+  test do
+    assert_match "markdown viewer", shell_output("#{bin}/attn --help")
+  end
+end

homebrew/attn.rb.template

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Updates the homebrew-attn tap formula with real SHA256 values from a release.
+#
+# Usage:
+#   ./homebrew/update-tap.sh <version>
+#
+# Requires: curl, gh (for pushing to the tap repo)
+#
+# Called by CI after publish-release, or manually after cutting a release.
+
+REPO="lightsofapollo/attn"
+TAP_REPO="lightsofapollo/homebrew-attn"
+
+VERSION="${1:?Usage: update-tap.sh <version>}"
+TAG="v${VERSION}"
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+TEMPLATE="${SCRIPT_DIR}/attn.rb.template"
+
+if [ ! -f "$TEMPLATE" ]; then
+  echo "Template not found: ${TEMPLATE}" >&2
+  exit 1
+fi
+
+echo "Fetching SHA256 checksums for ${TAG}..."
+
+SHA_DARWIN_ARM64="$(curl -sfL "https://github.com/${REPO}/releases/download/${TAG}/attn-${TAG}-darwin-arm64.sha256" | awk '{print $1}')"
+SHA_LINUX_X64="$(curl -sfL "https://github.com/${REPO}/releases/download/${TAG}/attn-${TAG}-linux-x64.sha256" | awk '{print $1}')"
+
+if [ -z "$SHA_DARWIN_ARM64" ]; then
+  echo "Failed to fetch darwin-arm64 SHA256" >&2
+  exit 1
+fi
+if [ -z "$SHA_LINUX_X64" ]; then
+  echo "Failed to fetch linux-x64 SHA256" >&2
+  exit 1
+fi
+
+echo "  darwin-arm64: ${SHA_DARWIN_ARM64}"
+echo "  linux-x64:    ${SHA_LINUX_X64}"
+
+# Generate formula from template
+FORMULA="$(sed \
+  -e "s/%%VERSION%%/${VERSION}/g" \
+  -e "s/%%SHA256_DARWIN_ARM64%%/${SHA_DARWIN_ARM64}/g" \
+  -e "s/%%SHA256_LINUX_X64%%/${SHA_LINUX_X64}/g" \
+  "$TEMPLATE")"
+
+# Get the current file SHA from the tap repo (needed for the GitHub API update)
+CURRENT_SHA="$(gh api "repos/${TAP_REPO}/contents/Formula/attn.rb" --jq '.sha' 2>/dev/null || true)"
+
+ARGS=(
+  --method PUT
+  --field "message=Update attn to ${VERSION}"
+  --field "content=$(echo "$FORMULA" | base64)"
+  --field "branch=main"
+)
+
+if [ -n "$CURRENT_SHA" ]; then
+  ARGS+=(--field "sha=${CURRENT_SHA}")
+fi
+
+gh api "repos/${TAP_REPO}/contents/Formula/attn.rb" "${ARGS[@]}"
+
+echo "Formula updated in ${TAP_REPO}"