From 90598056d4399eb79879c713bba35083b20664f0 Mon Sep 17 00:00:00 2001
From: Claude <sjat+claude@ziethen.dk>
Date: Sun, 17 May 2026 17:24:34 +0200
Subject: [PATCH] ci: build slides via Forgejo Actions runner
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Adds .forgejo/workflows/build-slides.yml triggering on push to main and
manual dispatch. Job runs in node:20-bookworm-slim, installs marp-cli +
python3, mounts /srv/slides/html into /output, and invokes
build-slides.sh with OUTPUT_DIR=/output.

build-slides.sh now honors OUTPUT_DIR/SLIDES_TITLE/REPO_WEB_URL env
overrides (defaults preserve local-dev behavior), wipes stale .html
before each build, and regenerates a styled index.html listing every
deck — replacing the equivalent logic from the old webhook update.sh.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 .forgejo/workflows/build-slides.yml | 29 ++++++++++++++++++
 build-slides.sh                     | 47 +++++++++++++++++++++++------
 2 files changed, 67 insertions(+), 9 deletions(-)
 create mode 100644 .forgejo/workflows/build-slides.yml

diff --git a/.forgejo/workflows/build-slides.yml b/.forgejo/workflows/build-slides.yml
new file mode 100644
index 0000000..b0a7f3a
--- /dev/null
+++ b/.forgejo/workflows/build-slides.yml
@@ -0,0 +1,29 @@
+name: Build slides
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: self-hosted
+    container:
+      image: node:20-bookworm-slim
+      volumes:
+        - /srv/slides/html:/output
+    env:
+      OUTPUT_DIR: /output
+    steps:
+      - name: Install build dependencies
+        run: |
+          set -e
+          apt-get update -qq
+          apt-get install -y --no-install-recommends git python3 ca-certificates
+          npm install -g @marp-team/marp-cli
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build slides into /output
+        run: bash build-slides.sh
diff --git a/build-slides.sh b/build-slides.sh
index 417a5c6..5e9732d 100755
--- a/build-slides.sh
+++ b/build-slides.sh
@@ -2,7 +2,14 @@
 set -euo pipefail
 
 REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-OUTPUT_DIR="$REPO_ROOT/slides"
+OUTPUT_DIR="${OUTPUT_DIR:-$REPO_ROOT/slides}"
+SLIDES_TITLE="${SLIDES_TITLE:-MakerFLOSS Slides}"
+REPO_WEB_URL="${REPO_WEB_URL:-https://forgejo.makerfloss.eu/sjat/MakerFLOSS}"
+
+mkdir -p "$OUTPUT_DIR"
+
+# Wipe previously built slides so deleted/de-tagged .md files disappear.
+find "$OUTPUT_DIR" -maxdepth 1 -name "*.html" -delete
 
 # Find all markdown files with marp: true frontmatter
 SLIDES=()
@@ -18,7 +25,7 @@ fi
 echo "Found ${#SLIDES[@]} presentation(s):"
 printf '  %s\n' "${SLIDES[@]}"
 
-# Create temp output directory for Docker
+# Create temp output directory for Docker fallback
 TEMP_OUTPUT=$(mktemp -d)
 chmod 777 "$TEMP_OUTPUT"
 trap "rm -rf '$TEMP_OUTPUT'" EXIT
@@ -27,7 +34,6 @@ if command -v marp &>/dev/null; then
   marp --html --output "$OUTPUT_DIR/" "${SLIDES[@]}"
 else
   echo "marp not found locally — using Docker (marpteam/marp-cli)..."
-  # Process each slide individually in Docker
   for slide in "${SLIDES[@]}"; do
     REL_SLIDE="${slide#${REPO_ROOT}/}"
     BASENAME=$(basename "${slide%.*}")
@@ -36,14 +42,9 @@ else
       -v "$TEMP_OUTPUT":/home/marp/output \
       marpteam/marp-cli --html --output "/home/marp/output/${BASENAME}.html" "$REL_SLIDE"
   done
+  cp "$TEMP_OUTPUT"/*.html "$OUTPUT_DIR/" 2>/dev/null || true
 fi
 
-# Ensure output directory exists
-mkdir -p "$OUTPUT_DIR"
-
-# Copy generated HTML files to final output directory
-cp "$TEMP_OUTPUT"/*.html "$OUTPUT_DIR/" 2>/dev/null || true
-
 # Inject mermaid.js into any HTML that contains mermaid code blocks.
 # Marp emits fenced mermaid blocks as <pre><code class="language-mermaid">.
 # The script finds those elements, replaces them with <div class="mermaid">,
@@ -90,4 +91,32 @@ else
   echo "Warning: python3 not found — skipping mermaid injection"
 fi
 
+# Regenerate index.html listing every built deck.
+INDEX="$OUTPUT_DIR/index.html"
+{
+  printf '<!DOCTYPE html><html lang="en"><head><meta charset="utf-8">'
+  printf '<meta name="viewport" content="width=device-width,initial-scale=1">'
+  printf '<title>%s</title>' "$SLIDES_TITLE"
+  printf '<style>'
+  printf 'body{font-family:sans-serif;max-width:700px;margin:3rem auto;padding:0 1.5rem;background:#fafafa;}'
+  printf 'h1{font-size:1.6rem;margin-bottom:.25rem;}p.sub{color:#666;margin-top:0;}'
+  printf 'ul{list-style:none;padding:0;margin-top:2rem;}'
+  printf 'li{border:1px solid #e0e0e0;border-radius:6px;margin:.75rem 0;background:#fff;}'
+  printf 'li a{display:block;padding:1rem 1.25rem;text-decoration:none;color:#1a1a1a;font-size:1.05rem;}'
+  printf 'li a:hover{background:#f0f4ff;border-radius:6px;}'
+  printf 'footer{margin-top:3rem;color:#aaa;font-size:.8rem;}'
+  printf '</style></head><body>'
+  printf '<h1>%s</h1>' "$SLIDES_TITLE"
+  printf '<p class="sub">Built from <a href="%s">%s</a></p>' \
+    "$REPO_WEB_URL" "${REPO_WEB_URL#https://}"
+  printf '<ul>'
+  find "$OUTPUT_DIR" -maxdepth 1 -name "*.html" ! -name "index.html" | sort | while IFS= read -r html; do
+    name=$(basename "$html" .html)
+    printf '<li><a href="%s">%s</a></li>' "$(basename "$html")" "$name"
+  done
+  printf '</ul>'
+  printf '<footer>Last built: %s &middot; <a href="https://marp.app">Marp</a></footer>' "$(date -Iseconds)"
+  printf '</body></html>'
+} > "$INDEX"
+
 echo "Done — slides in $OUTPUT_DIR/"