Use defined codes and strings.

Git/git_command.cpp

@@ -50,12 +50,17 @@ GitCommand::GitCommand()
 }
 
 bool GitCommand::exec(QStringList const &options, int start_timeout, int finish_timeout) {
+    bool ret = false;
     if (GitCommand::initEnv) {
         Command cmd(QString("git"), options, m_workingDirectory,
                     start_timeout, finish_timeout);
-        return cmd.exec();
+        ret = cmd.exec();
+        //qCritical() << __func__ << ":" << __LINE__ << cmd.command()
+        //            << "," << cmd.args()
+        //            << ", result" << cmd.commandResult();
+        m_commandResult = cmd.commandResult();
     }
-    return 0;
+    return ret;
 }
 
 bool GitCommand::check(int start_timeout, int finish_timeout) {

Git/git_command.h

@@ -11,9 +11,14 @@ class GitCommand {
 
     bool exec(QStringList const &options, int start_timeout = 100000,
               int finish_timeout = 100000);
+
+    QString m_commandResult{};
+
 public:
     GitCommand();
 
+    void resetCommandResult() { m_commandResult.clear(); }
+    QString const &commandResult() const { return m_commandResult; }
 
     bool status(int start_timeout = 100000, int finish_timeout = 100000);
     bool check(int start_timeout = 100000, int finish_timeout = 100000);

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;