hide require/library calls in background process due to R CMD check

DESCRIPTION

@@ -7,11 +7,11 @@ Authors@R: c(
 Title: A Lightweight, Modern and Flexible Logging Utility
 Description: Inspired by the the 'futile.logger' R package and 'logging' Python module, this utility provides a flexible and extensible way of formatting and delivering log messages with low overhead.
 Version: 0.2.0
-Date: 2020-11-17
+Date: 2021-03-03
 URL: https://daroczig.github.io/logger/
 BugReports: https://github.com/daroczig/logger/issues
 Encoding: UTF-8
-RoxygenNote: 7.0.2
+RoxygenNote: 7.1.1
 License: AGPL-3
 Imports:
   utils

R/appenders.R

@@ -345,8 +345,9 @@ appender_async <- function(appender, batch = 1, namespace = 'async_logger',
     log_trace(paste('Async writer PID:', async_writer_process$get_pid()), namespace = 'async_logger')
 
     ## load minimum required packages
-    async_writer_process$run(function() require('logger'))
-    async_writer_process$run(function() require('txtq'))
+    async_writer_process$run(function() source(system.file(
+        'load-packages-in-background-process.R',
+        package = 'logger')))
     async_writer_process$run(init)
 
     ## connect to the message queue

inst/load-packages-in-background-process.R

@@ -0,0 +1,4 @@
+## this is to be called in the background process of appender_async
+## because having library/require calls in that function throws false R CMD check alerts
+require('logger')
+require('txtq')