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#!/usr/bin/env python3
"""Fetch lyrics from Genius for the current (or given) song and write them
in the flat `<artist> - <title>.txt` form that ncmpcpp reads.
Why this exists: ncmpcpp 0.10.1's built-in Genius scraper stops at the first
</div> inside the lyrics container. Genius now nests a LyricsHeader div there,
so ncmpcpp only captures the header ("N Contributors<title> Lyrics") and drops
the actual lyrics. This script parses the current Genius structure correctly.
Usage:
genius-lyrics.py # uses `mpc current` for artist/title
genius-lyrics.py "Artist" "Title"
genius-lyrics.py --force ... # refetch even if a good file already exists
Designed to be safe to call from ncmpcpp's execute_on_song_change: it never
raises to the caller, runs quietly, and skips songs that already have lyrics.
"""
from __future__ import annotations
import html
import json
import os
import re
import subprocess
import sys
import urllib.parse
import urllib.request
LYRICS_DIR = os.path.expanduser(
os.environ.get("NCMPCPP_LYRICS_DIR", "~/.local/share/lyrics")
)
UA = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36"
TIMEOUT = 12
# Content that means a previous (broken) scrape, so we should refetch:
# e.g. "2 Contributorsgestalt Lyrics"
BROKEN_RE = re.compile(r"^\s*\d+\s+Contributors?.*Lyrics\s*$", re.IGNORECASE | re.DOTALL)
MIN_VALID_LEN = 60 # real lyrics are always longer than this
def get(url: str) -> str:
req = urllib.request.Request(url, headers={"User-Agent": UA})
with urllib.request.urlopen(req, timeout=TIMEOUT) as r:
return r.read().decode("utf-8", "replace")
def current_song():
try:
out = subprocess.run(
["mpc", "current", "-f", "%artist%\t%title%"],
capture_output=True, text=True, timeout=5,
).stdout.strip()
except Exception:
return None
if not out or "\t" not in out:
return None
artist, title = out.split("\t", 1)
if not artist or not title:
return None
return artist, title
def lyrics_path(artist: str, title: str) -> str:
# ncmpcpp stores lyrics flat as "<artist> - <title>.txt"; '/' is unsafe.
name = f"{artist} - {title}.txt".replace("/", "_")
return os.path.join(LYRICS_DIR, name)
def needs_fetch(path: str, force: bool) -> bool:
if force or not os.path.exists(path):
return True
try:
with open(path, encoding="utf-8") as f:
content = f.read()
except OSError:
return True
return len(content.strip()) < MIN_VALID_LEN or bool(BROKEN_RE.match(content))
def _norm(s: str) -> str:
# Keep only alphanumerics (Unicode-aware: Korean stays), casefolded.
return "".join(ch for ch in s.casefold() if ch.isalnum())
def _artist_matches(query_artist: str, hit_artist: str) -> bool:
a, b = _norm(query_artist), _norm(hit_artist)
if not a or not b:
return False
return a in b or b in a
def genius_url(artist: str, title: str):
q = urllib.parse.quote(f"{artist} {title}")
try:
data = json.loads(get(f"https://genius.com/api/search/multi?q={q}"))
except Exception:
return None
# Only accept a hit whose artist matches the song's artist. Genius search
# happily returns unrelated songs when it lacks the track; writing those
# would be worse than writing nothing.
for section in data.get("response", {}).get("sections", []):
for hit in section.get("hits", []):
if hit.get("type") != "song":
continue
result = hit.get("result", {})
hit_artist = result.get("primary_artist", {}).get("name", "")
if _artist_matches(artist, hit_artist):
return result.get("url")
return None
def extract_lyrics(page: str) -> str:
# Every verse lives in a data-lyrics-container; concatenate them all.
parts = re.findall(
r'data-lyrics-container="true"[^>]*>(.*?)</div>'
r'(?=\s*<div data-lyrics-container|\s*<div[^>]*class="[^"]*RightSidebar'
r'|\s*</div>\s*<div[^>]*StyledLink|$)',
page, re.S,
)
if not parts:
parts = re.findall(r'data-lyrics-container="true"[^>]*>(.*)', page, re.S)
text = "".join(parts)
# Drop the nested header block (Contributors / "<song> Lyrics") that broke ncmpcpp.
text = re.sub(
r'<div[^>]*data-exclude-from-selection="true".*?</div>\s*</div>\s*</div>',
"", text, flags=re.S,
)
text = re.sub(r"<br\s*/?>", "\n", text) # line breaks
text = re.sub(r"<[^>]+>", "", text) # strip remaining tags
return html.unescape(text).strip()
def write_atomic(path: str, content: str) -> None:
os.makedirs(os.path.dirname(path), exist_ok=True)
tmp = path + ".tmp"
with open(tmp, "w", encoding="utf-8") as f:
f.write(content + "\n")
os.replace(tmp, path)
def main(argv) -> int:
force = "--force" in argv
argv = [a for a in argv if a != "--force"]
if len(argv) >= 2:
artist, title = argv[0], argv[1]
else:
song = current_song()
if not song:
return 0 # nothing playing; nothing to do
artist, title = song
path = lyrics_path(artist, title)
if not needs_fetch(path, force):
return 0
url = genius_url(artist, title)
if not url:
return 0
try:
lyrics = extract_lyrics(get(url))
except Exception:
return 0
if len(lyrics) < MIN_VALID_LEN or BROKEN_RE.match(lyrics):
return 0 # don't overwrite with garbage
write_atomic(path, lyrics)
return 0
if __name__ == "__main__":
try:
sys.exit(main(sys.argv[1:]))
except Exception:
sys.exit(0) # never disrupt ncmpcpp's song-change command
|
