Use defined codes and strings.

Git/main.cpp

@@ -15,6 +15,7 @@
 #include <QRegularExpression>
 #include <QFile>
 #include <QTextStream>
+#include <QRegularExpression>
 
 #include <optional>
 
@@ -90,6 +91,19 @@ int main(int argc, char **argv) {
             if (!gitCmd.pull()) {
                 return -4;
             }
+            QString const result = gitCmd.commandResult().trimmed();
+            if (result.contains("Already", Qt::CaseInsensitive)
+             && result.contains("up", Qt::CaseInsensitive)
+             && result.contains("to", Qt::CaseInsensitive)
+             && result.contains("date", Qt::CaseInsensitive)) {
+                qCritical() << internal::GIT_CUSTOMER_REPO_NO_UPDATE_NECESSARY;
+                return internal::GIT_NOT_NECESSARY_CODE;
+            } else
+            if (result.contains(QRegularExpression("[Uu]pdating\\s+[a-z0-9]{6,}\\.\\.[a-z0-9]{6,}"))) {
+                // Updating 49a97f5..13a0321
+                qCritical() << internal::GIT_CUSTOMER_REPO_UPDATED;
+                return internal::GIT_UPDATED_CODE;
+            }
         } else {
             if (!gitCmd.clone()) {
                 return -3;