IDEA-212048 vcs: trim commit messages for enormous commits

GitOrigin-RevId: 08c2fb9d4301e77ecb3024181a2884ad2ffe425e

platform/lang-impl/src/com/intellij/unscramble/AnnotateStackTraceAction.java

@@ -291,7 +291,7 @@ public class AnnotateStackTraceAction extends DumbAwareAction {
       if (revision != null) {
         return XmlStringUtil.escapeString(
           revision.getAuthor() + " " + DateFormatUtil.formatDateTime(revision.getDate()) + "\n" +
-          revision.getMessage()
+          VcsUtil.trimCommitMessageToSaneSize(revision.getMessage())
         );
       }
       return null;

platform/vcs-api/src/com/intellij/vcsUtil/VcsUtil.java

@@ -19,6 +19,7 @@ import com.intellij.ide.util.PropertiesComponent;
 import com.intellij.openapi.actionSystem.AnActionEvent;
 import com.intellij.openapi.actionSystem.CommonDataKeys;
 import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.application.ApplicationNamesInfo;
 import com.intellij.openapi.application.ReadAction;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.fileEditor.FileDocumentManager;
@@ -64,6 +65,9 @@ public class VcsUtil {
 
   @NotNull private static final VcsRoot FICTIVE_ROOT = new VcsRoot(null, null);
 
+  private static final int MAX_COMMIT_MESSAGE_LENGTH = 50000;
+  private static final int MAX_COMMIT_MESSAGE_LINES = 3000;
+
   public static int getMaxVcsLoadedFileSize() {
     return ourMaxLoadedFileSize;
   }
@@ -603,4 +607,34 @@ public class VcsUtil {
       .collect(Collectors.toSet());
   }
 
+  @NotNull
+  public static String trimCommitMessageToSaneSize(@NotNull String message) {
+    int nthLine = nthIndexOf(message, '\n', MAX_COMMIT_MESSAGE_LINES);
+    if (nthLine != -1 && nthLine < MAX_COMMIT_MESSAGE_LENGTH) {
+      return trimCommitMessageAt(message, nthLine);
+    }
+    if (message.length() > MAX_COMMIT_MESSAGE_LENGTH + 50) {
+      return trimCommitMessageAt(message, MAX_COMMIT_MESSAGE_LENGTH);
+    }
+    return message;
+  }
+
+  private static String trimCommitMessageAt(@NotNull String message, int index) {
+    return String.format("%s\n\n... Commit message is too long and was truncated by %s ...",
+                         message.substring(0, index),
+                         ApplicationNamesInfo.getInstance().getProductName());
+  }
+
+  private static int nthIndexOf(@NotNull String text, char c, int n) {
+    assert n > 0;
+    int length = text.length();
+    int count = 0;
+    for (int i = 0; i < length; i++) {
+      if (text.charAt(i) == c) {
+        count++;
+        if (count == n) return i;
+      }
+    }
+    return -1;
+  }
 }

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/issueLinks/IssueLinkHtmlRenderer.java

@@ -21,6 +21,7 @@ import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vcs.IssueNavigationConfiguration;
 import com.intellij.util.containers.Convertor;
 import com.intellij.util.ui.UIUtil;
+import com.intellij.vcsUtil.VcsUtil;
 import com.intellij.xml.util.XmlStringUtil;
 
 import java.util.List;
@@ -40,7 +41,7 @@ public class IssueLinkHtmlRenderer {
   @SuppressWarnings({"HardCodedStringLiteral"})
   public static String formatTextWithLinks(Project project, String str, Convertor<? super String, String> convertor) {
     if (StringUtil.isEmpty(str)) return "";
-    String comment = XmlStringUtil.escapeString(str, false);
+    String comment = XmlStringUtil.escapeString(VcsUtil.trimCommitMessageToSaneSize(str), false);
 
     StringBuilder commentBuilder = new StringBuilder();
     IssueNavigationConfiguration config = IssueNavigationConfiguration.getInstance(project);

platform/vcs-log/impl/src/com/intellij/vcs/log/ui/frame/CommitPresentationUtil.java

@@ -20,6 +20,7 @@ import com.intellij.vcs.log.VcsCommitMetadata;
 import com.intellij.vcs.log.VcsShortCommitDetails;
 import com.intellij.vcs.log.VcsUser;
 import com.intellij.vcs.log.util.VcsUserUtil;
+import com.intellij.vcsUtil.VcsUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -128,6 +129,8 @@ public class CommitPresentationUtil {
   private static String formatCommitText(@NotNull Project project,
                                          @NotNull String fullMessage,
                                          @NotNull Set<String> resolvedHashes) {
+    fullMessage = VcsUtil.trimCommitMessageToSaneSize(fullMessage);
+
     Font font = getCommitMessageFont();
     Convertor<String, String> convertor = s -> replaceHashes(s, resolvedHashes);
 

plugins/git4idea/src/git4idea/annotate/GitFileAnnotation.java

@@ -164,6 +164,7 @@ public class GitFileAnnotation extends FileAnnotation {
 
     String commitMessage = getCommitMessage(revisionNumber);
     if (commitMessage == null) commitMessage = lineInfo.getSubject() + "\n...";
+    commitMessage = VcsUtil.trimCommitMessageToSaneSize(commitMessage);
 
     return "commit " + revisionNumber.asString() +
            "\nAuthor: " + lineInfo.getAuthor() +