Track path formats not expanding in `set_fields` during import

[dchesbro]

When importing or re-importing albums I use the set_fields option to format incoming field metadata -- in my case using the beets-titlecase plugin. I would expect my configuration to format the artist and title fields using the %tcp{} function, but instead they are not expanded and written as $Title and $Artist_diff.

Disabling plugins completely prevents, the issue, but also negates the value of using this software for me. Disabling bandcamp convert deezer discogs spotify replaygain web specifically also prevents the issue, but I haven't been able to figure out why.

Problem

Running this command in verbose (-vv) mode:

$ beet -vv /downloads/!!!\ -\ Let\ It\ Be\ Blue\ \(2022\)\ -\ WEB\ V0/

Led to this problem:

Should be imported as `/music/!!! - (2002) Let It Be Blue [VBR V0]/01. Normal People.mp3...` but is instead imported as `/music/!!! - (2002) Let It Be Blue [VBR V0]/01. $Title ($Artist_feat).mp3...

Setup

• OS: Alpine Linux
• Python version: 3.10
• beets version: 2.2.0
• Turning off plugins made problem go away (yes/no): See note above

My configuration (output of beet config) is:

album_fields:
  mp3_info: |
    import re

    m = items[0].get('bitrate_mode', '')
    s = re.sub('b|vbr-new|vbr-old|-| ', '', items[0].get('encoder_settings', ''))

    if m == '':
      m = 'CBR'

      if not all(item.bitrate == items[0].bitrate for item in items):
        m = 'VBR'

    if 'preset' in s:
      s = re.sub('altpreset|preset', 'AP', s)
      s = s.replace('extreme', 'E').replace('insane', 'I').replace('standard', 'S')

    if s == '':
      if m == 'CBR':
        s = items[0].get('bitrate', 0) // 1000
      else:
        t = 0

        for item in items:
          t += item.bitrate

        s = t // len(items) // 1000

    return ' '.join(filter(None, [m,str(s)]))

albumtypes:
  bracket: '()'
  ignore_va: compilation soundtrack
  types:
    - ep: 'EP'
    - single: 'Single'

art_filename: front
bandcamp:
  art: yes
  search_max: 4

convert:
  auto: yes
  command: /config/convert.sh $source $dest
  extension: mp3
  ffmpeg: /usr/bin/ffmpeg
  never_convert_lossy_files: yes
  threads: 2

directory: /music
discogs:
  user_token: rPDwowNqqLtLBFbtFtYcxlMZRBZMEteWdBiLhAUR

fetchart:
  auto: yes
  cover_format: JPEG
  deinterlace: yes
  high_resolution: yes
  minwidth: 1000
  maxwidth: 1000
  quality: 100
  sources:
    - itunes
    - coverart: releasegroup
    - deezer
    - coverart: releasegroup
    - filesystem

format_album: $albumartist/($year) $album
format_item: ($year) $album/%if{$multi_disc,$disc_alt}$track. $title ($artist)
ftintitle:
  auto: yes
  format: (Feat. {0})

import:
  bell: yes
  copy: yes
  detail: yes
  from_scratch: yes
  log: /config/beets.log
  resume: ask
  set_fields:
    album: %tcp{$album%if{$albumdisambig, [$albumdisambig]}%if{$atypes, $atypes}}
    albumartist: %tcp{$albumartist}
    artist: %tcp{$artist_feat}
    title: %tcp{$title}
  timid: yes
  write: yes

importadded:
  preserve_mtimes: yes
  preserve_write_mtimes: yes

importreplace:
  replacements:
    - album_fields: album artist title
      item_fields: album artist title
      replace:
        '[\u2010-\u2015]': '-'
        '[\u2018-\u201B]': ''''
        '[\u201C-\u201F]': '"'
        '[\u2026]': '...'
        '\b([Aa]\.?[Kk]\.?[Aa]\.?)': 'AKA'
        '\b(Mr\.?)\b': 'Mr.'
        '\b(Mrs\.?)\b': 'Mrs.'
        '\b(Ms\.?)\b': 'Ms.'
        '\b([Vv]\.?[Ss]\.?)\b': 'vs.'

item_fields:
  artist_diff: 1 if albumartist != artist else 0
  artist_feat: |
    a = artist

    if 'Feat.' in a:
      a = ' & '.join(a.rsplit(' and ', 1))

    return a
  disc_alt: u'%d' % (disc)
  multi_disc: 1 if disctotal > 1 else 0

library: library.db
match:
  preferred:
    countries: ['US']
    media: ['Digital Media|File', 'CD']

paths:
  default: $albumartist - ($year) $album%if{$mp3_info, [$mp3_info]}/%if{$multi_disc,$disc_alt}$track. $title%if{$artist_diff, ($artist)}
  singleton: Non-Album/$track. $title ($artist)

per_disc_numbering: yes
pluginpath:
  - /config/plugins/beets-importreplace
  - /config/plugins/beets-tcp
plugins: albumtypes bandcamp chroma convert deezer discogs duplicates edit fetchart ftintitle fuzzy importadded importreplace info inline missing replaygain tcp web zero
replace:
  '[\x00-\x1F]': _
  '[\xE2-\xE6]': a
  '[\xE8-\xEB]': e
  '[\xEC-\xEF]': i
  '[\xF2-\xF6]': o
  '[\xF8]': o
  '[<>:"\?\*\|]': _
  '\.$': ''
  '\s+$': ''
  '^\.': ''

sort_album: albumartist+ year+ album+
sort_item: year+ album+ disc+ track+ artist+
tcp:
  asis: [
    # artists
    '$hort', 'AFI', 'INXS', 'MGMT',

    # default overrides
    'The',

    # misc.
    'ABC', 'AT&T', 'DJ', 'DNA', 'XXX',
    
    # road abbreviations
    'Blvd', 'Ln', 'Rd', 'St',
  ]

threaded: yes
va_name: Various Artists
ui:
  color: yes

zero:
  keep_fields: album albumartist albumtype artist comp disc disctotal rg_album_gain rg_album_peak rg_track_gain rg_track_peak singleton title track year