From 80b5d41eb6ede259bacca1a66dab2805d3a76694 Mon Sep 17 00:00:00 2001
From: Matthew Howle <mdhowle@gmail.com>
Date: Wed, 8 Jul 2020 19:07:56 -0400
Subject: [PATCH 1/2] Overwrite changelog only when modified

---
 src/downloader.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/downloader.cpp b/src/downloader.cpp
index 6968ab8..81f402a 100644
--- a/src/downloader.cpp
+++ b/src/downloader.cpp
@@ -2331,6 +2331,22 @@ void Downloader::saveChangelog(const std::string& changelog, const std::string&
         }
     }
 
+    // Check if changelog matches current changelog
+    if (boost::filesystem::exists(filepath))
+    {
+        std::ifstream ifs(filepath);
+        if (ifs)
+        {
+            std::string current_changelog((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>());
+            ifs.close();
+            if (changelog == current_changelog)
+            {
+                std::cout << "Changelog unchanged. Skipping: " << filepath << std::endl;
+                return;
+            }
+        }
+    }
+
     std::ofstream ofs(filepath);
     if (ofs)
     {

From 5cef659e9818d8df6a81ea32844596ee700c3e6c Mon Sep 17 00:00:00 2001
From: Matthew Howle <mdhowle@users.noreply.github.com>
Date: Sun, 20 Sep 2020 00:33:56 -0400
Subject: [PATCH 2/2] Adjust wording to be more precise

The variable name "current_changelog" was ambiguous. It could apply to both the newly obtained changelog from GOG and the previously saved changelog on the filesystem.
---
 src/downloader.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/downloader.cpp b/src/downloader.cpp
index 81f402a..97212ba 100644
--- a/src/downloader.cpp
+++ b/src/downloader.cpp
@@ -2331,15 +2331,15 @@ void Downloader::saveChangelog(const std::string& changelog, const std::string&
         }
     }
 
-    // Check if changelog matches current changelog
+    // Check whether the changelog has changed
     if (boost::filesystem::exists(filepath))
     {
         std::ifstream ifs(filepath);
         if (ifs)
         {
-            std::string current_changelog((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>());
+            std::string existing_changelog((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>());
             ifs.close();
-            if (changelog == current_changelog)
+            if (changelog == existing_changelog)
             {
                 std::cout << "Changelog unchanged. Skipping: " << filepath << std::endl;
                 return;