python_dev/etcgendex at main · helixmap/python_dev · GitHub

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#!/usr/bin/env python3
# gendex_lsF.py — terminal-style index (ls -F) with LS_COLORS, column-major layout
# @spiralbend 2025-09-10

import os
import stat
import argparse
import datetime
from pathlib import Path

# --- LS_COLORS support ----------------------------------------------------
FG = {30:"black",31:"red",32:"green",33:"yellow",34:"dodgerblue",35:"magenta",36:"cyan",37:"white"}
BG = {code+10: color for code, color in FG.items()}
skipped = 0

def parse_ls_colors():
    raw = os.getenv("LS_COLORS", "")
    cmap = {}
    for part in raw.split(":"):
        if "=" not in part: continue
        key, val = part.split("=", 1)
        codes = [int(x) for x in val.split(";") if x.isdigit()]
        styles = []
        for c in codes:
            if c == 1: styles.append("font-weight:bold")
            elif c == 4: styles.append("text-decoration:underline")
            elif c in FG: styles.append(f"color:{FG[c]}")
            elif c in BG: styles.append(f"background-color:{BG[c]}")
        if styles: cmap[key] = ";".join(styles)
    return cmap

LS_COLOR_MAP = parse_ls_colors()

def color_style(st_mode, full_path):
    if stat.S_ISDIR(st_mode): key = "di"
    elif stat.S_ISLNK(st_mode): key = "ln"
    elif stat.S_ISFIFO(st_mode): key = "pi"
    elif stat.S_ISSOCK(st_mode): key = "so"
    elif stat.S_ISBLK(st_mode): key = "bd"
    elif stat.S_ISCHR(st_mode): key = "cd"
    else: key = "ex" if os.access(full_path, os.X_OK) else "fi"
    if key in LS_COLOR_MAP: return LS_COLOR_MAP[key]
    name = full_path.lower()
    for pat, style in sorted(LS_COLOR_MAP.items(), key=lambda x: -len(x[0])):
        if pat.startswith("*.") and name.endswith(pat[1:].lower()):
            return style
    return ""

def classify_suffix(st_mode, is_dir, full_path):
    if is_dir: return "/"
    if stat.S_ISLNK(st_mode): return "@"
    if stat.S_ISFIFO(st_mode): return "|"
    if stat.S_ISSOCK(st_mode): return "="
    if os.access(full_path, os.X_OK): return "*"
    return ""

# ---------------------------------------------------------------------------

TEMPLATE = """<!DOCTYPE html>
<html>
<head>
  <link rel="icon" type="image/x-icon" href="/favicon.ico?v=2">
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Index of /{path}</title>
  <style>
    html,body,pre,span,a {{ background-color:black!important; font-size:12pt; }}
    @media (max-width: 500px) {{ html,body,pre,span,a {{ font-size:8pt; }} }}
    body {{ margin:0; padding:0; color:lime; font-family:monospace; margin-left:0.5cm; }}
    a {{ color:lime; text-decoration:none; }}
    a:hover {{ text-decoration:underline; }}
    .prompt {{ color:orange }}
    .dir {{ color:white }}
    .cursor {{ display:inline-block; animation: blink 1s steps(1) infinite; }}
    @keyframes blink {{ 50% {{ opacity:0; }} }}
    /* Listing container; JS will set columns; keep items tight like terminal */
    #grid {{ display:grid; grid-auto-rows:min-content; align-items:start; column-gap:2ch; row-gap:0.2em; }}
    .item {{ white-space:pre; }}
  </style>
</head>
<body onload="boot()">
<!-- ::spiralbend:: autogenerated index -->
<script>
function formatLinuxDate(date=new Date()) {{
  const days=['Sun','Mon','Tue','Wed','Thu','Fri','Sat'];
  const months=['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
  const d=date, dayName=days[d.getDay()], monthName=months[d.getMonth()];
  const day=String(d.getDate()).padStart(2,' ');
  const hh=String(d.getHours()).padStart(2,'0');
  const mm=String(d.getMinutes()).padStart(2,'0');
  const ss=String(d.getSeconds()).padStart(2,'0');
  const tz=new Intl.DateTimeFormat('en-US',{{timeZoneName:'short'}}).formatToParts(d).find(p=>p.type==='timeZoneName').value;
  return `${{dayName}} ${{monthName}} ${{day}} ${{hh}}:${{mm}}:${{ss}} ${{tz}} ${{d.getFullYear()}}`;
}}
function chWidth(el) {{
  const t=document.createElement('span');
  t.textContent='0'.repeat(100);
  t.style.visibility='hidden'; t.style.position='absolute'; t.style.whiteSpace='pre';
  el.appendChild(t);
  const w=t.getBoundingClientRect().width/100;
  t.remove(); return w;
}}
function columnMajorReorder(nodes, cols) {{
  const items=[...nodes];
  const rows=Math.ceil(items.length/cols);
  const ordered=[];
  for (let r=0;r<rows;r++) {{
    for (let c=0;c<cols;c++) {{
      const idx=c*rows + r;
      if (items[idx]) ordered.push(items[idx]);
    }}
  }}
  return ordered;
}}
function layout() {{
  const grid=document.getElementById('grid');
  if (!grid) return;
  const items=[...grid.children];
  if (items.length===0) return;
  const maxLen=Math.max(...items.map(n=>parseInt(n.dataset.len||'0',10)));
  const cw=chWidth(grid);
  const cols=Math.max(1, Math.floor(grid.clientWidth / ((maxLen+2)*cw)));
  grid.style.gridTemplateColumns=`repeat(${{cols}}, max-content)`;
  const ordered=columnMajorReorder(items, cols);
  grid.innerHTML='';
  ordered.forEach(n=>grid.appendChild(n));
}}
function boot() {{
  document.getElementById('theDate').textContent=formatLinuxDate();
  layout();
  addEventListener('resize', ()=>layout());
}}
</script>
<pre>

<span class="prompt">𝜟<span class="dir"><span style="letter-spacing:-0.5ch;"> </span>{dir}</span>·</span> ls -F
<div id="grid">
{items}
</div>
<span class="prompt">𝜟<span class="dir"><span style="letter-spacing:-0.5ch;"> </span>{dir}</span>·</span> date<br><span id="theDate"></span>
<span class="prompt">𝜟<span class="dir"><span style="letter-spacing:-0.5ch;"> </span>{dir}</span>·</span> <span class="cursor"><b>_</b></span>
</pre>
</body>
</html>
"""

TOKEN = "::spiralbend:: autogenerated index"

def make_item(name, href, full_path, st_mode):
    style = color_style(st_mode, full_path)
    style_attr = f' style="{style}"' if style else ""
    disp = name
    return f'<span class="item" data-len="{len(disp)}"><a href="{href}"{style_attr}>{disp}</a></span>'

def build_index(dirpath, rel_dir, dirnames, filenames, include_dotfiles):
    items = []

    # parent link first
    rel_parent = os.path.relpath(os.path.join(dirpath, ".."), dirpath)
    parent_full = os.path.join(dirpath, "..")
    items.append(make_item("..", rel_parent, parent_full, os.lstat(parent_full).st_mode))

    all_entries = sorted(dirnames + filenames, key=str.lower)
    all_entries = [n for n in all_entries if n.lower() != "index.html"]

    for name in all_entries:
        if not include_dotfiles and name.startswith((".", "__")):
            continue
        full_path = os.path.join(dirpath, name)
        try:
            st = os.lstat(full_path)
        except FileNotFoundError:
            continue
        is_dir = stat.S_ISDIR(st.st_mode)
        suffix = classify_suffix(st.st_mode, is_dir, full_path)
        disp = name + suffix
        href = f"{name}/" if is_dir else name
        items.append(make_item(disp, href, full_path, st.st_mode))

    return TEMPLATE.format(
        path=rel_dir if rel_dir != "." else "",
        dir=Path(rel_dir).name,
        items="\n".join(items),
    )

def process_dir(root, include_dotfiles=False, verbose=False, no_depth=False):
    global skipped
    for dirpath, dirnames, filenames in os.walk(root):
        if no_depth and os.path.abspath(dirpath) != os.path.abspath(root):
            break

        rel_dir = os.path.relpath(dirpath, root)
        if rel_dir != "." and not include_dotfiles and any(part.startswith((".", "__")) for part in rel_dir.split(os.sep)):
            continue

        index_path = os.path.join(dirpath, "index.html")
        index_exists = os.path.exists(index_path)
        html = build_index(dirpath, rel_dir, dirnames, filenames, include_dotfiles)

        if index_exists:
            try:
                with open(index_path, "r") as fh:
                    content = fh.read()
            except Exception as e:
                if verbose: print(f"Error reading {index_path}: {e}")
                continue
            if TOKEN not in content:
                if verbose: print(f"Skipping existing index (no token): {index_path}")
                continue
            if content.strip() == html.strip():
                skipped += 1
                if verbose: print(f"Skipping unmodified index: {index_path}")
                continue

        with open(index_path, "w") as fh:
            fh.write(html)
            print(f"{'Updated' if index_exists else 'Created'} index: {index_path}")

if __name__ == "__main__":
    p = argparse.ArgumentParser(description="Generate ls -F style index.html files with LS_COLORS and column layout.")
    p.add_argument("root", nargs="?", default=".", help="Root directory (default: .)")
    p.add_argument("--include-dotfiles", action="store_true", help="Include dotfiles and dot directories")
    p.add_argument("--verbose", action="store_true", help="Print progress while generating indexes")
    p.add_argument("--no-depth", action="store_true", help="Only generate index.html in the root directory")
    args = p.parse_args()
    process_dir(args.root, include_dotfiles=args.include_dotfiles, verbose=args.verbose, no_depth=args.no_depth)
    if not args.verbose: print(f"Skipped {skipped} unmodified indexes.")