1 files changed, 50 insertions, 0 deletions
diff --git a/tools/asciidoctor-unicodeconverter.rb b/tools/asciidoctor-unicodeconverter.rb
new file mode 100644
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--- /dev/null
+++ b/tools/asciidoctor-unicodeconverter.rb
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+# Copyright (C) 2023 Thomas Weißschuh <thomas@t-8ch.de>
+# Extension for asciidoctor to remove unicode dash in first section of manpage
+
+require 'asciidoctor/extensions'
+
+module UnicodeConverter
+  BEFORE_NAME_SECTION = 1
+  IN_NAME_SECTION = 2
+  AFTER_NAME_SECTION = 3
+
+  class Preprocessor < Asciidoctor::Extensions::Preprocessor
+    include Asciidoctor::Logging
+
+    def process document, reader
+      lines = reader.read_lines
+      state = BEFORE_NAME_SECTION
+      command = document.attributes['docname'].rpartition('.')[0]
+      lines.map! do |line|
+        if state == IN_NAME_SECTION
+          if line.sub! " \u2013 ", " - " or line.sub! " \u2014 ", " - "
+            logger.warn "replacing unicode dash in name section of #{document.attributes['docfile']}"
+          end
+
+          if line.start_with? command and not line.include? ',' and not line.start_with? "#{command} - "
+            logger.warn "adding dash to name section of #{document.attributes['docfile']}"
+            line.sub! command, "#{command} - "
+          end
+        end
+
+        if line.start_with? '== '
+          if state == BEFORE_NAME_SECTION
+            state = IN_NAME_SECTION
+          else if state == IN_NAME_SECTION
+            state = AFTER_NAME_SECTION
+          end
+        end
+      end
+
+        line
+      end
+      reader.restore_lines lines
+      reader
+    end
+  end
+
+  Asciidoctor::Extensions.register do
+    preprocessor Preprocessor
+  end
+
+end