[doc] Add deprecation label for deprecated rules

pmd-doc/src/main/java/net/sourceforge/pmd/docs/RuleDocGenerator.java

@@ -38,6 +38,9 @@ public class RuleDocGenerator {
     private static final String RULESET_INDEX_FILENAME_PATTERN = "docs/pages/pmd/rules/${language.tersename}/${ruleset.name}.md";
     private static final String RULESET_INDEX_PERMALINK_PATTERN = "pmd_rules_${language.tersename}_${ruleset.name}.html";
 
+    private static final String DEPRECATION_LABEL_SMALL = "<span style=\"border-radius: 0.25em; color: #fff; padding: 0.2em 0.6em 0.3em; display: inline; background-color: #d9534f; font-size: 75%;\">Deprecated</span> ";
+    private static final String DEPRECATION_LABEL = "<span style=\"border-radius: 0.25em; color: #fff; padding: 0.2em 0.6em 0.3em; display: inline; background-color: #d9534f;\">Deprecated</span> ";
+
     private final Path root;
     private final FileWriter writer;
 
@@ -145,7 +148,9 @@ public class RuleDocGenerator {
                             .replace("${language.tersename}", languageTersename)
                             .replace("${ruleset.name}", getRuleSetFilename(ruleset));
                     link += "#" + rule.getName().toLowerCase(Locale.ROOT);
-                    lines.add("*   [" + rule.getName() + "](" + link + "): " + getShortRuleDescription(rule));
+                    lines.add("*   [" + rule.getName() + "](" + link + "): "
+                            + (rule.isDeprecated() ? DEPRECATION_LABEL_SMALL : "")
+                            + getShortRuleDescription(rule));
                 }
                 lines.add("");
             }
@@ -219,6 +224,10 @@ public class RuleDocGenerator {
                 for (Rule rule : getSortedRules(ruleset)) {
                     lines.add("## " + rule.getName());
                     lines.add("");
+                    if (rule.isDeprecated()) {
+                        lines.add(DEPRECATION_LABEL);
+                        lines.add("");
+                    }
                     if (rule.getSince() != null) {
                         lines.add("**Since:** " + rule.getSince());
                         lines.add("");

pmd-doc/src/test/resources/expected/java.md

@@ -8,5 +8,6 @@ List of rulesets and rules contained in each ruleset.
 *   [Sample](pmd_rules_java_sample.html): Sample ruleset to test rule doc generation.
 
 ## Sample
+*   [DeprecatedSample](pmd_rules_java_sample.html#deprecatedsample): <span style="border-radius: 0.25em; color: #fff; padding: 0.2em 0.6em 0.3em; display: inline; background-color: #d9534f; font-size: 75%;">Deprecated</span> Just some description of a deprecated rule.
 *   [JumbledIncrementer](pmd_rules_java_sample.html#jumbledincrementer): Avoid jumbled loop incrementers - its usually a mistake, and is confusing even if intentional.
 *   [OverrideBothEqualsAndHashcode](pmd_rules_java_sample.html#overridebothequalsandhashcode): Override both public boolean Object.equals(Object other), and public int Object.hashCode(), or ov...

pmd-doc/src/test/resources/expected/sample.md

@@ -6,6 +6,16 @@ folder: pmd/rules/java
 sidebaractiveurl: /pmd_rules_java.html
 editmepath: ../rulesets/ruledoctest/sample.xml
 ---
+## DeprecatedSample
+
+<span style="border-radius: 0.25em; color: #fff; padding: 0.2em 0.6em 0.3em; display: inline; background-color: #d9534f;">Deprecated</span> 
+
+**Since:** 1.0
+
+**Priority:** Medium (3)
+
+Just some description of a deprecated rule.
+
 ## JumbledIncrementer
 
 **Since:** 1.0

pmd-doc/src/test/resources/rulesets/ruledoctest/sample.xml

@@ -82,4 +82,27 @@ public class JumbledIncrementerRule1 {
  ]]>
      </example>
      </rule>
+
+<rule name="DeprecatedSample"
+      language="java"
+      since="1.0"
+      message="Sample rule, which is deprecated"
+      class="net.sourceforge.pmd.lang.rule.XPathRule"
+      externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_sample.html#deprecatedsample"
+      deprecated="true">
+ <description>
+Just some description of a deprecated rule.
+ </description>
+ <priority>3</priority>
+ <properties>
+     <property name="xpath">
+         <value>
+<![CDATA[
+//ForStatement
+]]>
+         </value>
+     </property>
+ </properties>
+ </rule>
+
 </ruleset>