Use Asciidoctor::LoggerManager to obtain default logger if available

1 files changed, 10 insertions, 2 deletions

diff --git a/lib/asciidoctor/interdoc_reftext/resolver.rb b/lib/asciidoctor/interdoc_reftext/resolver.rb
index 7deac2f..0da8511 100644
--- a/lib/asciidoctor/interdoc_reftext/resolver.rb
+++ b/lib/asciidoctor/interdoc_reftext/resolver.rb
@@ -9,13 +9,21 @@ module Asciidoctor::InterdocReftext
 
     # @param document [Asciidoctor::Document] the document associated with this resolver.
     # @param asciidoc_exts [Array<String>] AsciiDoc file extensions (e.g. `.adoc`).
-    # @param logger [Logger] the logger to use for logging warning and errors.
+    # @param logger [Logger, nil] the logger to use for logging warning and errors.
+    #   Defaults to `Asciidoctor::LoggerManager.logger` if using Asciidoctor 1.5.7+,
+    #   or `Logger.new(STDERR)` otherwise.
     # @param raise_exceptions [Boolean] whether to raise exceptions, or just log them.
     def initialize(document,
                    asciidoc_exts: ['.adoc', '.asciidoc', '.ad'],
-                   logger: ::Logger.new(STDERR),
+                   logger: nil,
                    raise_exceptions: true)
 
+      logger ||= if defined? ::Asciidoctor::LoggerManager
+        ::Asciidoctor::LoggerManager.logger
+      else
+        ::Logger.new(STDERR)
+      end
+
       @document = document
       @asciidoc_exts = asciidoc_exts.dup.freeze
       @logger = logger