From b505f7147e4452090a61950ec92ac877a3ecaca3 Mon Sep 17 00:00:00 2001
From: Thomas Miceli <tho.miceli@gmail.com>
Date: Sat, 18 Mar 2023 23:53:05 +0100
Subject: [PATCH] Truncate diff

---
 internal/git/output_parser.go  | 9 +++++++++
 templates/pages/revisions.html | 4 +++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/internal/git/output_parser.go b/internal/git/output_parser.go
index c7d02a6..3b75cec 100644
--- a/internal/git/output_parser.go
+++ b/internal/git/output_parser.go
@@ -58,6 +58,7 @@ func parseLog(out io.Reader) []*Commit {
 	var currentCommit *Commit
 	var currentFile *File
 	var isContent bool
+	var bytesRead = 0
 
 	for scanner.Scan() {
 		// new commit found
@@ -103,6 +104,7 @@ func parseLog(out io.Reader) []*Commit {
 
 				// create a new file
 				isContent = false
+				bytesRead = 0
 				currentFile = &File{}
 				filenameRegex := regexp.MustCompile(`^diff --git a/(.+) b/(.+)$`)
 				matches := filenameRegex.FindStringSubmatch(string(line))
@@ -131,6 +133,13 @@ func parseLog(out io.Reader) []*Commit {
 
 			if isContent {
 				currentFile.Content += string(line) + "\n"
+
+				bytesRead += len(line)
+				if bytesRead > 2<<18 {
+					currentFile.Truncated = true
+					currentFile.Content = ""
+					isContent = false
+				}
 			}
 
 			scanner.Scan()
diff --git a/templates/pages/revisions.html b/templates/pages/revisions.html
index d1eef7c..40fd01d 100644
--- a/templates/pages/revisions.html
+++ b/templates/pages/revisions.html
@@ -39,7 +39,9 @@
                             </p>
                         </div>
                         <div class="code overflow-auto">
-                            {{ if and (eq $file.Content "") (ne $file.OldFilename "") }}
+                            {{ if $file.Truncated }}
+                                <p class="m-2 ml-4 text-xs">Diff truncated because its too large to be shown</p>
+                            {{ else if and (eq $file.Content "") (ne $file.OldFilename "") }}
                                 <p class="m-2 ml-4 text-xs">File renamed without changes</p>
                             {{ else if eq $file.Content "" }}
                                 <p class="m-2 ml-4 text-xs">Empty file</p>