Full rewrite

.github/scripts/create-markdowns.sh

@@ -0,0 +1,218 @@
+#!/usr/bin/env bash
+# Regenerate WALLPAPERS.md (and its 2/3-column variants, and tags/*.md)
+# from the contents of wallpapers/.
+# When a wallpaper has both a static png and an animated gif (same
+# basename), only one row is emitted, previewed with the gif.
+
+set -uo pipefail
+
+wallpapers_dir="wallpapers"
+tags_dir="tags"
+
+if [[ ! -d "$wallpapers_dir" ]]; then
+  exit 0
+fi
+
+# Each entry: name<TAB>basename<TAB>preview<TAB>raw_tags(underscore-joined)
+build_entries() {
+  shopt -s nullglob
+  declare -A seen
+  for file in "$wallpapers_dir"/*.png "$wallpapers_dir"/*.gif; do
+    filename=$(basename "$file")
+    base="${filename%.*}"
+
+    [[ -n "${seen[$base]:-}" ]] && continue
+    seen[$base]=1
+
+    preview="$file"
+    if [[ -f "$wallpapers_dir/$base.gif" ]]; then
+      preview="$wallpapers_dir/$base.gif"
+    fi
+
+    name="${base%%_*}"
+    tags=""
+    if [[ "$base" == *_* ]]; then
+      tags="${base#*_}"
+    fi
+
+    printf '%s\t%s\t%s\t%s\n' "$name" "$base" "$preview" "$tags"
+  done | sort -t $'\t' -k1,1
+}
+
+mapfile -t entries < <(build_entries)
+
+# Collect the sorted, de-duplicated list of tags, and which entries have them.
+declare -A tag_seen
+all_tags=()
+for entry in "${entries[@]}"; do
+  IFS=$'\t' read -r _ _ _ tags_raw <<<"$entry"
+  [[ -z "$tags_raw" ]] && continue
+  IFS='_' read -ra tokens <<<"$tags_raw"
+  for t in "${tokens[@]}"; do
+    if [[ -z "${tag_seen[$t]:-}" ]]; then
+      tag_seen[$t]=1
+      all_tags+=("$t")
+    fi
+  done
+done
+mapfile -t sorted_tags < <(printf '%s\n' "${all_tags[@]}" | sort)
+
+entry_has_tag() {
+  local tags_raw="$1" tag="$2" t
+  IFS='_' read -ra tokens <<<"$tags_raw"
+  for t in "${tokens[@]}"; do
+    [[ "$t" == "$tag" ]] && return 0
+  done
+  return 1
+}
+
+# tags_links <raw_tags> <tag-link-prefix>
+# Turns "foo_bar-baz" into "[foo](<prefix>foo.md), [bar-baz](<prefix>bar-baz.md)"
+tags_links() {
+  local tags_raw="$1" tag_prefix="$2"
+  [[ -z "$tags_raw" ]] && return
+  local -a tokens
+  IFS='_' read -ra tokens <<<"$tags_raw"
+  local out="" t first=1
+  for t in "${tokens[@]}"; do
+    ((first)) || out+=", "
+    first=0
+    out+="[${t}](${tag_prefix}${t}.md)"
+  done
+  printf '%s' "$out"
+}
+
+# render_table <cols> <preview-prefix> <tag-link-prefix> <entries...>
+render_table() {
+  local cols="$1" prefix="$2" tag_prefix="$3"
+  shift 3
+  local -a items=("$@")
+
+  local header="|" sep="|"
+  local i
+  for ((i = 0; i < cols; i++)); do
+    header+=" Preview | Name | Tags |"
+    sep+="---------|------|------|"
+  done
+  echo "$header"
+  echo "$sep"
+
+  local total=${#items[@]}
+  local idx=0
+  while ((idx < total)); do
+    local line="|"
+    local c
+    for ((c = 0; c < cols; c++)); do
+      if ((idx < total)); then
+        local name base preview tags_raw tags_display
+        IFS=$'\t' read -r name base preview tags_raw <<<"${items[idx]}"
+        tags_display="$(tags_links "$tags_raw" "$tag_prefix")"
+        line+=" ![${base}](${prefix}${preview}) | ${name} | ${tags_display} |"
+        ((idx++))
+      else
+        line+="  |  |  |"
+      fi
+    done
+    echo "$line"
+  done
+}
+
+# render_grid <cols> <preview-prefix> <tag-link-prefix> <entries...>
+# Like render_table, but each cell stacks the image with its name and
+# tags underneath instead of using separate Name/Tags columns.
+render_grid() {
+  local cols="$1" prefix="$2" tag_prefix="$3"
+  shift 3
+  local -a items=("$@")
+
+  local header="|" sep="|"
+  local i
+  for ((i = 0; i < cols; i++)); do
+    header+=" |"
+    sep+=":---:|"
+  done
+  echo "$header"
+  echo "$sep"
+
+  local total=${#items[@]}
+  local idx=0
+  while ((idx < total)); do
+    local line="|"
+    local c
+    for ((c = 0; c < cols; c++)); do
+      if ((idx < total)); then
+        local name base preview tags_raw tags_display cell
+        IFS=$'\t' read -r name base preview tags_raw <<<"${items[idx]}"
+        tags_display="$(tags_links "$tags_raw" "$tag_prefix")"
+        cell="![${base}](${prefix}${preview})<br>${name}"
+        [[ -n "$tags_display" ]] && cell+="<br>${tags_display}"
+        line+=" ${cell} |"
+        ((idx++))
+      else
+        line+="  |"
+      fi
+    done
+    echo "$line"
+  done
+}
+
+nav_block() {
+  echo "[1 Column](WALLPAPERS.md) · [2 Columns](WALLPAPERS-2COL.md) · [3 Columns](WALLPAPERS-3COL.md)"
+}
+
+tags_block() {
+  local prefix="$1"
+  echo "<details>"
+  echo "<summary>Tags</summary>"
+  echo
+  local t
+  for t in "${sorted_tags[@]}"; do
+    echo "- [${t}](${prefix}${tags_dir}/${t}.md)"
+  done
+  echo
+  echo "</details>"
+}
+
+generate_main() {
+  local file="$1" cols="$2"
+  {
+    echo "# Wallpapers"
+    echo
+    nav_block
+    echo
+    tags_block ""
+    echo
+    if ((cols > 1)); then
+      render_grid "$cols" "" "${tags_dir}/" "${entries[@]}"
+    else
+      render_table "$cols" "" "${tags_dir}/" "${entries[@]}"
+    fi
+  } >"$file"
+  git add "$file"
+}
+
+generate_main "WALLPAPERS.md" 1
+generate_main "WALLPAPERS-2COL.md" 2
+generate_main "WALLPAPERS-3COL.md" 3
+
+rm -rf "$tags_dir"
+mkdir -p "$tags_dir"
+for t in "${sorted_tags[@]}"; do
+  tag_items=()
+  for entry in "${entries[@]}"; do
+    IFS=$'\t' read -r _ _ _ tags_raw <<<"$entry"
+    if entry_has_tag "$tags_raw" "$t"; then
+      tag_items+=("$entry")
+    fi
+  done
+  {
+    echo "# Tag: ${t}"
+    echo
+    echo "[← All wallpapers](../WALLPAPERS.md)"
+    echo
+    render_table 1 "../" "" "${tag_items[@]}"
+  } >"$tags_dir/$t.md"
+done
+git add "$tags_dir"
+
+echo "Generated WALLPAPERS.md, WALLPAPERS-2COL.md, WALLPAPERS-3COL.md and $tags_dir/"