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Export library: Dont use /tmp on Linux for exporting the FTS database as some boneheaded Linux distros mount /tmp in RAM which can be very small. Fixes #2126863 [Calibre Fails to Export Library](https://bugs.launchpad.net/calibre/+bug/2126863)

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Kovid Goyal 2025-10-05 12:26:14 +05:30
parent ab621d8de0
commit 5a5ff4e86a
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1 changed files with 24 additions and 17 deletions
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41
src/calibre/db/cache.py
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@ -14,7 +14,8 @@ import sys
import traceback
import weakref
from collections import defaultdict
from collections.abc import Iterable, MutableSet, Set
from collections.abc import Iterable, Iterator, MutableSet, Set
from contextlib import contextmanager
from functools import partial, wraps
from io import DEFAULT_BUFFER_SIZE, BytesIO
from queue import Queue
@ -3153,29 +3154,35 @@ class Cache:
progress(fname, poff, total)
poff += 1
@contextmanager
def tempfile_for_export(name: str) -> Iterator[str]:
import tempfile
fd, ans = tempfile.mkstemp(suffix=name, dir=exporter.base)
os.close(fd)
try:
yield ans
finally:
os.remove(ans)
report_progress('metadata.db')
pt = PersistentTemporaryFile('-export.db')
pt.close()
self.backend.backup_database(pt.name)
dbkey = key_prefix + ':::' + 'metadata.db'
with open(pt.name, 'rb') as f:
exporter.add_file(f, dbkey)
os.remove(pt.name)
with tempfile_for_export('-export.db') as tf:
self.backend.backup_database(tf)
dbkey = key_prefix + ':::' + 'metadata.db'
with open(tf, 'rb') as f:
exporter.add_file(f, dbkey)
if has_fts:
report_progress('full-text-search.db')
pt = PersistentTemporaryFile('-export.db')
pt.close()
self.backend.backup_fts_database(pt.name)
ftsdbkey = key_prefix + ':::full-text-search.db'
with open(pt.name, 'rb') as f:
exporter.add_file(f, ftsdbkey)
os.remove(pt.name)
notesdbkey = key_prefix + ':::notes.db'
with PersistentTemporaryFile('-export.db') as pt:
with tempfile_for_export('-export.db') as tf:
self.backend.backup_fts_database(tf)
ftsdbkey = key_prefix + ':::full-text-search.db'
with open(tf, 'rb') as f:
exporter.add_file(f, ftsdbkey)
with tempfile_for_export('-export.db') as tf, open(tf, 'r+b') as pt:
self.backend.export_notes_data(pt)
pt.flush()
pt.seek(0)
report_progress('notes.db')
notesdbkey = key_prefix + ':::notes.db'
exporter.add_file(pt, notesdbkey)
format_metadata = {}