andrew
543f10e662
run-playlist.sh and import-track.sh had the same beets->#EXTM3U block, but import-track.sh wrote the file non-atomically. Move it to pipeline/lib/m3u.sh as regen_m3u <name> <out>, sourced by both. The helper always writes atomically (temp + rename), so a reader like Navidrome never sees a partial file and a stray wrong-owner leftover .m3u8 is replaced without a chown. Returns 0 always (empty result is a warning), so it's safe as a standalone call under set -e. Verified: tests/test_m3u.py (atomic write with tracks, no file when empty; 44 tests green) plus a live regen against the real library (techno -> 229 tracks, no temp leftover). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
38 lines
1.3 KiB
Bash
38 lines
1.3 KiB
Bash
#!/bin/bash
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# Sourced helper: regenerate one playlist's .m3u8 from the beets library.
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#
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# regen_m3u <playlist_name> <out_path>
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#
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# Writes atomically (temp file in the same dir, then rename over the target):
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# rename(2) is atomic for a reader like Navidrome, and needs write access only
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# on the directory, so it also replaces a stray wrong-owner leftover .m3u8 (e.g.
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# from a pre-container run) without a host-side chown.
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#
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# Relies on the caller's log() function and $LOG. Always returns 0 (an empty
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# result is a warning, not a failure), so it is safe to call as a standalone
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# statement under set -euo pipefail.
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regen_m3u() {
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local playlist_name="$1"
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local out="$2"
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mkdir -p "$(dirname "$out")"
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local beet_output
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# || true: beet ls exits non-zero on no match, which would trip set -e.
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beet_output=$(beet ls -f '$path' "grouping:${playlist_name}" 2>>"$LOG" || true)
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local track_count=0
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[[ -n "$beet_output" ]] && track_count=$(printf '%s\n' "$beet_output" | wc -l)
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if [[ "$track_count" -gt 0 ]]; then
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local tmp="${out}.tmp.$$"
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{
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echo "#EXTM3U"
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echo "$beet_output"
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} > "$tmp"
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mv "$tmp" "$out"
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log "M3U updated with $track_count tracks"
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else
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log "WARNING: beet list returned no tracks for grouping:${playlist_name} — not updating M3U"
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fi
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return 0
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}
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