add option to control how far to indent nested list markers

CHANGELOG.adoc

@@ -7,6 +7,10 @@ For a detailed view of what has changed, refer to the {uri-repo}/commits/master[
 
 == Unreleased
 
+=== Added
+
+* Add :nested_list_marker_indent API option and --nested-list-marker-indent CLI option to control how many spaces to indent nested list markers per indent level
+
 === Fixed
 
 * Convert language tag on source block to lowercase (#106)

lib/kramdown-asciidoc/api.rb

@@ -27,6 +27,7 @@ module AsciiDoc
   # @option opts [Symbol] :wrap (:preserve) the line wrapping behavior to apply (:preserve, :ventilate, or :none).
   # @option opts [Integer] :heading_offset (0) the heading offset to apply to heading levels.
   # @option opts [Boolean] :auto_links (true) whether to allow raw URLs to be recognized as links.
+  # @option opts [Integer] :nested_list_marker_indent (1) how many spaces to indent nested list markers per indent level.
   # @option opts [Hash] :attributes ({}) additional AsciiDoc attributes to add to header of output document; reserved
   #   attributes, like stem, may be overridden; some attributes may impact conversion, such as idprefix and idseparator
   # @option opts [String] :imagesdir (nil) the prefix to remove from image references found in the Markdown document;
@@ -85,6 +86,7 @@ def self.convert markdown, opts = {}
   # @option opts [Symbol] :wrap (:preserve) the line wrapping behavior to apply (:preserve, :ventilate, or :none).
   # @option opts [Integer] :heading_offset (0) the heading offset to apply to heading levels.
   # @option opts [Boolean] :auto_links (true) whether to allow raw URLs to be recognized as links.
+  # @option opts [Integer] :nested_list_marker_indent (1) how many spaces to indent nested list markers per indent level.
   # @option opts [Hash] :attributes ({}) additional AsciiDoc attributes to add to header of output document; reserved
   #   attributes, like stem, may be overridden; some attributes may impact conversion, such as idprefix and idseparator
   # @option opts [String] :imagesdir (nil) the prefix to remove from image references found in the Markdown document;

lib/kramdown-asciidoc/cli.rb

@@ -75,6 +75,10 @@ def parse args
           options[:auto_links] = auto_links
         end
 
+        opts.on '--nested-list-marker-indent=NUMBER', ::Integer, 'Set how many spaces to indent nested list markers per indent level (default: 1)' do |nested_list_marker_indent|
+          options[:nested_list_marker_indent] = nested_list_marker_indent
+        end
+
         opts.on '-h', '--help', 'Display this help text and exit' do
           $stdout.write opts.help
           return 0

lib/kramdown-asciidoc/converter.rb

@@ -92,6 +92,7 @@ def initialize root, opts
       @ids_seen = {}
       @footnote_ids = ::Set.new
       @auto_links = opts.fetch :auto_links, true
+      @nested_list_marker_indent = [opts[:nested_list_marker_indent] || 1, 0].max
       @diagram_languages = opts[:diagram_languages] || %w(plantuml mermaid)
       @heading_offset = opts[:heading_offset] || 0
       @imagesdir = opts[:imagesdir] || @attributes['imagesdir']
@@ -338,7 +339,7 @@ def convert_li el, opts
         remaining = children
         primary_lines = ['{blank}']
       end
-      primary_lines.unshift %(#{indent > 0 ? ' ' * indent : ''}#{marker * level} #{primary_lines.shift})
+      primary_lines.unshift %(#{indent > 0 ? ' ' * (indent * @nested_list_marker_indent) : ''}#{marker * level} #{primary_lines.shift})
       writer.add_lines primary_lines
       return if remaining.empty?
       if remaining.find {|n| (type = n.type) == :blank ? nil : ((BLOCK_TYPES.include? type) ? true : break) }

spec/cli_spec.rb

@@ -201,6 +201,34 @@
       (expect $stdout.string).to eql expected
     end
 
+    it 'does not indent ul list markers with --nested-list-marker-indent set to 0' do
+      the_source_file = scenario_file 'ul/nested-0-indent.md'
+      expected = File.read (scenario_file 'ul/nested-0-indent.adoc'), mode: 'rb'
+      (expect subject.run %W(-o - --nested-list-marker-indent=0 #{the_source_file})).to eql 0
+      (expect $stdout.string).to eql expected
+    end
+
+    it 'does not indent ol list markers with --nested-list-marker-indent set to 0' do
+      the_source_file = scenario_file 'ol/nested-0-indent.md'
+      expected = File.read (scenario_file 'ol/nested-0-indent.adoc'), mode: 'rb'
+      (expect subject.run %W(-o - --nested-list-marker-indent=0 #{the_source_file})).to eql 0
+      (expect $stdout.string).to eql expected
+    end
+
+    it 'does indent ul list markers according to --nested-list-marker-indent configuration' do
+      the_source_file = scenario_file 'ul/nested-3-indent.md'
+      expected = File.read (scenario_file 'ul/nested-3-indent.adoc'), mode: 'rb'
+      (expect subject.run %W(-o - --nested-list-marker-indent=3 #{the_source_file})).to eql 0
+      (expect $stdout.string).to eql expected
+    end
+
+    it 'does indent ol list markers according to --nested-list-marker-indent configuration' do
+      the_source_file = scenario_file 'ol/nested-3-indent.md'
+      expected = File.read (scenario_file 'ol/nested-3-indent.adoc'), mode: 'rb'
+      (expect subject.run %W(-o - --nested-list-marker-indent=3 #{the_source_file})).to eql 0
+      (expect $stdout.string).to eql expected
+    end
+
     it 'shifts headings by offset when --heading-offset is used' do
       the_source_file = scenario_file 'heading/offset.md'
       expected = File.read (scenario_file 'heading/offset.adoc'), mode: 'rb'

spec/scenarios/ol/nested-0-indent.adoc

@@ -0,0 +1,11 @@
+. bread
+.. french country
+.. sourdough
+.. multigrain
+. milk
+.. 2%
+... whole
+.. skim
+. eggs
+.. brown
+.. white

spec/scenarios/ol/nested-0-indent.md

@@ -0,0 +1,11 @@
+1. bread
+   1. french country
+   2. sourdough
+   3. multigrain
+2. milk
+   1. 2%
+      1. whole
+   2. skim
+3. eggs
+   1. brown
+   2. white

spec/scenarios/ol/nested-0-indent.opts

@@ -0,0 +1 @@
+:nested_list_marker_indent: 0

spec/scenarios/ol/nested-3-indent.adoc

@@ -0,0 +1,11 @@
+. bread
+   .. french country
+   .. sourdough
+   .. multigrain
+. milk
+   .. 2%
+      ... whole
+   .. skim
+. eggs
+   .. brown
+   .. white

spec/scenarios/ol/nested-3-indent.md

@@ -0,0 +1,11 @@
+1. bread
+   1. french country
+   2. sourdough
+   3. multigrain
+2. milk
+   1. 2%
+      1. whole
+   2. skim
+3. eggs
+   1. brown
+   2. white

spec/scenarios/ol/nested-3-indent.opts

@@ -0,0 +1 @@
+:nested_list_marker_indent: 3

spec/scenarios/ul/nested-0-indent.adoc

@@ -0,0 +1,11 @@
+* bread
+** french country
+** sourdough
+** multigrain
+* milk
+** 2%
+*** whole
+** skim
+* eggs
+** brown
+** white

spec/scenarios/ul/nested-0-indent.md

@@ -0,0 +1,11 @@
+- bread
+  - french country
+  - sourdough
+  - multigrain
+- milk
+  - 2%
+    - whole
+  - skim
+- eggs
+  - brown
+  - white

spec/scenarios/ul/nested-0-indent.opts

@@ -0,0 +1 @@
+:nested_list_marker_indent: 0

spec/scenarios/ul/nested-3-indent.adoc

@@ -0,0 +1,11 @@
+* bread
+   ** french country
+   ** sourdough
+   ** multigrain
+* milk
+   ** 2%
+      *** whole
+   ** skim
+* eggs
+   ** brown
+   ** white

spec/scenarios/ul/nested-3-indent.md

@@ -0,0 +1,11 @@
+- bread
+  - french country
+  - sourdough
+  - multigrain
+- milk
+  - 2%
+    - whole
+  - skim
+- eggs
+  - brown
+  - white

spec/scenarios/ul/nested-3-indent.opts

@@ -0,0 +1 @@
+:nested_list_marker_indent: 3