fixed usage with JULIA_DEBUG

Project.toml

@@ -1,7 +1,7 @@
 name = "LoggingExtras"
 uuid = "e6f89c97-d47a-5376-807f-9c37f3926c36"
 authors = ["Frames White <oxinabox@ucc.asn.au>", "Collaborators <https://github.com/JuliaLogging/LoggingExtras.jl/graphs/contributors>"]
-version = "1.0.1"
+version = "1.0.2"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"

src/CompositionalLoggers/common.jl

@@ -4,9 +4,10 @@
 # before passing anything on.
 
 # For checking child logger, need to check both `min_enabled_level` and `shouldlog`
-function comp_shouldlog(logger, args...)
-    level = first(args)
-    min_enabled_level(logger) <= level && shouldlog(logger, args...)
+function comp_shouldlog(logger, level, _module, group, id)
+    (min_enabled_level(logger) <= level && shouldlog(logger, level, _module, group, id)) ||
+        Base.CoreLogging.env_override_minlevel(group, _module)
+        # `env_override_minlevel` is the internal function that makes JULIA_DEBUG environment variable work
 end
 
 # For checking if child logger will take the message you are sending

test/runtests.jl

@@ -297,6 +297,51 @@ end
     @test length(logger.logs) == 1
 end
 
+# Define a module for testing conditional debug messages
+module JuliaDebugTest
+
+    function debug_message(str)
+        @debug str
+    end
+
+end
+
+@testset "JULIA_DEBUG" begin
+    expected_messages = 0
+    logger = TestLogger(min_level=Info)
+    with_logger(logger) do
+        JuliaDebugTest.debug_message("debug")
+    end
+    @test length(logger.logs) == expected_messages
+
+    extra_logger = TransformerLogger(logger) do log
+        merge(log, (; message="New message"))
+    end
+    with_logger(extra_logger) do
+        JuliaDebugTest.debug_message("debug")
+    end
+    @test length(logger.logs) == expected_messages
+
+    ENV["JULIA_DEBUG"] = "JuliaDebugTest"
+    with_logger(logger) do
+        JuliaDebugTest.debug_message("debug")
+        expected_messages += 1
+    end
+    @test length(logger.logs) == expected_messages
+
+    with_logger(extra_logger) do
+        JuliaDebugTest.debug_message("debug")
+        expected_messages += 1
+    end
+    @test length(logger.logs) == expected_messages
+
+    delete!(ENV, "JULIA_DEBUG")
+    with_logger(extra_logger) do
+        JuliaDebugTest.debug_message("debug")
+    end
+    @test length(logger.logs) == expected_messages
+end
+
 @testset "Deprecations" begin
     # Nothing is currently deprecated
 end