Integrated log rotation is a good option, but for some corner cases it would be good to have an option to disable it.
For example if you use /dev/stdout as your log file.

Right now I'm running a docker container with flibgolite, and logs are interrupted every 1-2 days. Restart helps. The only suspicion is log rotation.

Steps to reproduce:

1. take a big archive, for example fb2.flibusta.net (just for tests, we don't justify the piracy)
2. move all the zip files into books/new
3. wait

<...>
INFO:	2022/07/11 17:23:29 file 550971.fb2 from f.fb2-550756-552903.zip has been added
INFO:	2022/07/11 17:23:30 file 186024.fb2 from f.fb2-185838-188548.zip has been added
INFO:	2022/07/11 17:23:31 Router --->URL: [/opds]
2022/07/11 17:23:33 database is locked (5) (SQLITE_BUSY)
panic: database is locked (5) (SQLITE_BUSY)

goroutine 24 [running]:
log.Panic({0xc000845ad8?, 0xba9070?, 0xc000028020?})
	/usr/local/go/src/log/log.go:385 +0x65
github.com/vinser/flibgolite/pkg/database.(*DB).NewBook(0xc000010890, 0xc000845e60)
	/flibgolite/pkg/database/database.go:50 +0x32b
github.com/vinser/flibgolite/pkg/stock.(*Handler).indexFB2Zip(0xc0003c9ec0, {0xc000292e40, 0x31})
	/flibgolite/pkg/stock/stock.go:275 +0xc25
github.com/vinser/flibgolite/pkg/stock.(*Handler).ScanDir.func1()
	/flibgolite/pkg/stock/stock.go:107 +0x45
created by github.com/vinser/flibgolite/pkg/stock.(*Handler).ScanDir
	/flibgolite/pkg/stock/stock.go:106 +0x852

Restart helps

Got this:

INFO:   2022/07/23 09:41:38 Router --->URL: [/opds/genres?code=sf_action]
2022/07/23 09:41:38 sql: Scan error on column index 4, name "format": destination not a pointer

root@OpenWrt:/mnt/sda5/books$ ./flibgolite-linux-arm-6
I: 18:01:39 Service is running unix-systemv.
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x5ffc38]

goroutine 20 [running]:
github.com/vinser/flibgolite/pkg/stock.(*Handler).indexFB2Zip(0x165b740, {0x159eaf0, 0x46})
/home/vinser/Dev/flibgolite/pkg/stock/stock.go:279 +0xa0c
github.com/vinser/flibgolite/pkg/stock.(*Handler).ScanDir.func1()
/home/vinser/Dev/flibgolite/pkg/stock/stock.go:109 +0x40
created by github.com/vinser/flibgolite/pkg/stock.(*Handler).ScanDir
/home/vinser/Dev/flibgolite/pkg/stock/stock.go:108 +0x9f0

root@OpenWrt:/mnt/sda5/books$ cat ./logs/scan.log
SERVICE: 2022/10/19 17:59:07 New acquisitions scanning started...
INFO: 2022/10/19 17:59:07 scanning folder /mnt/sda5/torrent/Downloads/Books/Flibusta.Net for new books.../n
DEBUG: 2022/10/19 17:59:07 stock.go:105: zip: f.usr-524141-526015.zip
DEBUG: 2022/10/19 17:59:07 stock.go:251:

File : 524142.pdf
NonUTF8 : false
Modified : 2018-07-02 02:11:34 +0300 +0300
CRC32 : 3177836722
UncompressedSize64 : 26640417

INFO: 2022/10/19 17:59:07 file 524142.pdf from f.usr-524141-526015.zip has unsupported format ".pdf"
DEBUG: 2022/10/19 17:59:07 stock.go:273:

To test flibgolite on OS X I have no MAC hardware. I hope it will run good :)

Would be nice to have an official image on dockerhub or somewhere else, as it's one of the most convenient ways to deploy software.

It would be useful for the application to work with a single folder of the book stock

OpenSearch requests from tested clients like (fbreader and bookreader) can't be issued or don't processed

Doesn't find Ukrainian "Усмiшки" with search string "усмi*", but with "усм*" it does.

STOCK folder is created with not enough permissions