File.WriteAllText truncates the destination before writing, so an interrupted
write leaves a half-written or empty Settings.json, and the in-process lock added
in the previous commit cannot help a reader in another process - the GUI and the
CLI share this file.
Route every write through Dinah.Core.IO.AtomicFileWriter, which writes a sibling
temp file, flushes to disk and renames it over the destination. Validate the temp
file parses as json before the swap, the same way JsonFilePersister<T> already
saves AccountsSettings.json, so a bad payload leaves the existing file untouched.
Co-authored-by: rmcrackan <rmcrackan@gmail.com>
Configuration.Instance is a process-wide singleton read and written from the UI
thread, BackgroundWorker callbacks and download workers at the same time, but
PersistentDictionary guarded only its file writes. Its two Dictionary caches were
touched without synchronization, so concurrent inserts eventually corrupted them
and threw "Operations that change non-concurrent collections must have exclusive
access" (issue #1959, reported from MainVM.UpdateCountsBw_Completed reading
AutoDownloadEpisodes while a second GetCounts pass ran).
Reads on the file were unguarded too: Exists/GetJObject could observe a partially
written Settings.json, and readFile responds to empty contents by rewriting the
file, so a reader racing a writer could scramble the settings on disk.
Take one lock across each operation's cache and file access, and keep logging
outside it by having writeFile report whether it rewrote the file.
Co-authored-by: rmcrackan <rmcrackan@gmail.com>
Introduce <is-> Tag. Like <has-> but with additional check on content.
Retrieve objects instead of string for conditions
Pass undefined formats as null instead of empty strings
- Update all project runtime targets
- Update all dependencies
- NOTE: Using Npgsql.EntityFrameworkCore.PostgreSQL RTM build from MyGet
- Delete unused pubxml files (they were made redundant by recent workflow changes)
- Replace Libation.sln with Libation.slnx
