The placeholder for the directory in the writer.file property can affect the append attribute.

[aches]

Describe the bug
When I use System.setProperty("tinylog.directory", path), the append property not works, and the log file gets overwritten every time the application starts.

To Reproduce

writer2          = rolling file
writer2.level    = debug
writer2.file     = #{tinylog.directory}/log_{date:yyyy-MM-dd}.txt
writer2.append   = true
writer2.backups  = 10
writer2.format   = {date: HH:mm:ss.SSS} {level} {class}.{method}():{line}: {message}
writer2.charset = UTF-8
writer2.policies = size: 512mb

java code:
String path = Environment.getExternalStoragePublicDirectory("lb_logs").getPath() + "/"; System.setProperty("tinylog.directory", path);
Environment
tinylog version: 2.7.0
Java version: 11.0.21

[pmwmedia]

The rolling file writer does not support the append property. This property is only for the simple file writer. See: https://tinylog.org/v2/configuration/#file-writer

Actually, the rolling file writer should always append the log file until the policies are met.

Please use String path = Environment.getExternalStoragePublicDirectory("lb_logs").getPath(); . The last path separator is redundant.