[devkit] IJPL-200209 add test which ensures that CONTRIBUTING.md examples of commit messages are valid

Signed-off-by: Dmitry Batkovich <dmitry.batkovich@jetbrains.com>

GitOrigin-RevId: 7d9a4771cf587cd65f8fe36c82840397ab1db771

CONTRIBUTING.md

@@ -44,7 +44,7 @@ We strongly recommend following this commit message format:
     - `docs`, `doc`
     - `format`, `style`
 
-     Example: `[ui] typo “accross” → “across”`
+     Example: ```[ui] typo “accross” → “across”```
 
 ## Building the IDE
 

plugins/devkit/intellij.devkit.git/test/IntelliJPlatformPrePushHandlerTest.kt

@@ -1,6 +1,7 @@
 // Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package org.jetbrains.idea.devkit.commit
 
+import com.intellij.openapi.application.PathManager
 import org.junit.Test
 import org.junit.experimental.runners.Enclosed
 import org.junit.runner.RunWith
@@ -8,6 +9,9 @@ import org.junit.runners.Parameterized
 import org.junit.runners.Parameterized.Parameter
 import java.nio.file.Path
 import java.nio.file.Paths
+import kotlin.io.path.div
+import kotlin.io.path.exists
+import kotlin.io.path.readText
 
 @RunWith(Enclosed::class)
 class IntelliJPlatformPrePushHandlerTest {
@@ -332,6 +336,44 @@ class IntelliJPlatformPrePushHandlerTest {
       }
     }
   }
+
+  class ContributingMdCommitMessagesAreValid {
+    @Test
+    fun testCommitMessagesFromContributingMd() {
+      val contributingFile = Path.of(PathManager.getCommunityHomePath()) / "CONTRIBUTING.md"
+      assert(contributingFile.exists()) { "CONTRIBUTING.md file not found at expected location" }
+      
+      val content = contributingFile.readText()
+      val commitMessages = extractCommitMessagesFromMarkdown(content)
+      
+      assert(commitMessages.isNotEmpty()) { "No commit messages found in CONTRIBUTING.md" }
+      
+      commitMessages.forEach { commitMessage ->
+        assert(prePushHandler.isCommitMessageCorrect(commitMessage)) {
+          "Commit message from CONTRIBUTING.md is invalid: '$commitMessage'"
+        }
+      }
+    }
+    
+    private fun extractCommitMessagesFromMarkdown(content: String): List<String> {
+      val codeBlockRegex = Regex("```(.*?)```", RegexOption.DOT_MATCHES_ALL)
+      val commitMessages = mutableListOf<String>()
+      
+      codeBlockRegex.findAll(content).forEach { match ->
+        val codeBlock = match.groupValues[1].trim()
+
+        if (codeBlock.contains("[<") && codeBlock.contains(">]")) {
+          return@forEach
+        }
+
+        if (codeBlock.isNotEmpty()) {
+          commitMessages.add(codeBlock)
+        }
+      }
+      
+      return commitMessages
+    }
+  }
 }
 
 private val prePushHandler = IntelliJPlatformPrePushHandler()