Allow '0'- and ' '-prefixed ordered list markers in MD005/MD029 (fixes #126).

doc/Rules.md

@@ -190,6 +190,31 @@ for the list to fix it:
   * Nested Item 3
 ```
 
+Sequentially-ordered list markers are usually left-aligned such that all items
+have the same starting column:
+
+```markdown
+...
+8. Item
+9. Item
+10. Item
+11. Item
+...
+```
+
+This rule also supports right-alignment of list markers such that all items have
+the same ending column:
+
+```markdown
+...
+ 8. Item
+ 9. Item
+10. Item
+11. Item
+...
+```
+
+
 <a name="md006"></a>
 
 ## MD006 - Consider starting bulleted lists at the beginning of the line
@@ -850,6 +875,17 @@ Example invalid list for all styles:
 3. Done.
 ```
 
+This rule supports 0-prefixing ordered list items for uniform indentation:
+
+```markdown
+...
+08. Item
+09. Item
+10. Item
+11. Item
+...
+```
+
 <a name="md030"></a>
 
 ## MD030 - Spaces after list markers

lib/md005.js

@@ -10,10 +10,32 @@ module.exports = {
   "tags": [ "bullet", "ul", "indentation" ],
   "function": function MD005(params, onError) {
     shared.flattenLists().forEach(function forList(list) {
+      const expectedIndent = list.indent;
+      let expectedEnd = 0;
+      let actualEnd = -1;
+      let endMatching = false;
       list.items.forEach(function forItem(item) {
-        shared.addErrorDetailIf(onError, item.lineNumber, list.indent,
-          shared.indentFor(item), null,
-          shared.rangeFromRegExp(item.line, shared.listItemMarkerRe));
+        const actualIndent = shared.indentFor(item);
+        if (list.unordered) {
+          shared.addErrorDetailIf(onError, item.lineNumber,
+            expectedIndent, actualIndent, null,
+            shared.rangeFromRegExp(item.line, shared.listItemMarkerRe));
+        } else {
+          const match = shared.orderedListItemMarkerRe.exec(item.line);
+          actualEnd = match && match[0].length;
+          expectedEnd = expectedEnd || actualEnd;
+          if ((expectedIndent !== actualIndent) || endMatching) {
+            if (expectedEnd === actualEnd) {
+              endMatching = true;
+            } else {
+              const detail = endMatching ?
+                `Expected: (${expectedEnd}); Actual: (${actualEnd})` :
+                `Expected: ${expectedIndent}; Actual: ${actualIndent}`;
+              shared.addError(onError, item.lineNumber, detail, null,
+                shared.rangeFromRegExp(item.line, shared.listItemMarkerRe));
+            }
+          }
+        }
       });
     });
   }

lib/md029.js

@@ -4,8 +4,6 @@
 
 const shared = require("./shared");
 
-const numberRe = /^[\s>]*([^.)]*)[.)]/;
-
 module.exports = {
   "names": [ "MD029", "ol-prefix" ],
   "description": "Ordered list item prefix",
@@ -17,12 +15,12 @@ module.exports = {
         let listStyle = style;
         if (listStyle === "one_or_ordered") {
           const second = (list.items.length > 1) &&
-            numberRe.exec(list.items[1].line);
+            shared.orderedListItemMarkerRe.exec(list.items[1].line);
           listStyle = (second && (second[1] !== "1")) ? "ordered" : "one";
         }
         let number = 1;
         list.items.forEach(function forItem(item) {
-          const match = numberRe.exec(item.line);
+          const match = shared.orderedListItemMarkerRe.exec(item.line);
           shared.addErrorDetailIf(onError, item.lineNumber,
             String(number), !match || match[1],
             "Style: " + (listStyle === "one" ? "1/1/1" : "1/2/3"),

lib/shared.js

@@ -17,7 +17,8 @@ module.exports.inlineCommentRe = inlineCommentRe;
 // Regular expressions for range matching
 module.exports.atxHeadingSpaceRe = /^#+\s*\S/;
 module.exports.bareUrlRe = /(?:http|ftp)s?:\/\/[^\s]*/i;
-module.exports.listItemMarkerRe = /^[\s>]*(?:[*+-]|\d+\.)\s+/;
+module.exports.listItemMarkerRe = /^[\s>]*(?:[*+-]|\d+[.)])\s+/;
+module.exports.orderedListItemMarkerRe = /^[\s>]*0*(\d+)[.)]/;
 
 // readFile options for reading with the UTF-8 encoding
 module.exports.utf8Encoding = { "encoding": "utf8" };

test/detailed-results-MD001-MD010.md

@@ -15,3 +15,16 @@
 Text 
 
 Text	text
+
+ 1. One
+ 2. Two
+ 3. Three
+ 4. Four
+5. Five
+ 6. Six
+ 7. Seven
+ 8. Eight
+ 9. Nine
+10. Ten
+ 11. Eleven
+12. Twelve

test/detailed-results-MD001-MD010.results.json

@@ -39,6 +39,22 @@
         "errorContext": null,
         "errorRange": [1, 3]
     },
+    {
+        "lineNumber": 23,
+        "ruleNames": [ "MD005", "list-indent" ],
+        "ruleDescription": "Inconsistent indentation for list items at the same level",
+        "errorDetail": "Expected: 1; Actual: 0",
+        "errorContext": null,
+        "errorRange": [1, 3]
+    },
+    {
+        "lineNumber": 29,
+        "ruleNames": [ "MD005", "list-indent" ],
+        "ruleDescription": "Inconsistent indentation for list items at the same level",
+        "errorDetail": "Expected: (3); Actual: (4)",
+        "errorContext": null,
+        "errorRange": [1, 5]
+    },
     {
         "lineNumber": 12,
         "ruleNames": [ "MD006", "ul-start-left" ],

test/list-item-prefix-alignment.md

@@ -0,0 +1,96 @@
+# List Alignment
+
+## Leading Spaces
+
+ 1. One
+ 2. Two
+ 3. Three
+ 4. Four
+ 5. Five
+ 6. Six
+ 7. Seven
+ 8. Eight
+ 9. Nine
+10. Ten
+11. Eleven
+12. Twelve
+
+## Leading Zeroes
+
+01. One
+02. Two
+03. Three
+04. Four
+05. Five
+06. Six
+07. Seven
+08. Eight
+09. Nine
+10. Ten
+11. Eleven
+12. Twelve
+
+## Double Leading Zeroes
+
+001. One
+002. Two
+003. Three
+
+## Nested Lists
+
+- Item
+- Item
+  01. One
+  02. Two
+  03. Three
+  04. Four
+  05. Five
+  06. Six
+  07. Seven
+  08. Eight
+  09. Nine
+  10. Ten
+  11. Eleven
+  12. Twelve
+- Item
+- Item
+   1. One
+   2. Two
+   3. Three
+   4. Four
+   5. Five
+   6. Six
+   7. Seven
+   8. Eight
+   9. Nine
+  10. Ten
+  11. Eleven
+  12. Twelve
+- Item
+- Item
+
+## Another Nested List
+
+01. One
+02. Two
+    01. One
+    02. Two
+03. Three
+04. Four
+
+## Leading Spaces Errors
+
+  1. One
+  2. Two
+  3. Three
+  4. Four
+ 5. Five {MD005}
+  6. Six
+  7. Seven
+  8. Eight
+  9. Nine
+ 10. Ten
+  11. Eleven {MD005}
+ 12. Twelve
+13. Thirteen {MD005}
+ 14. Fourteen