Added gitShowReason(): get lastCommit, message and date of last commit to insert inti

sendLastVersion-message to ISMAS.

git/git_client.cpp

@@ -114,6 +114,47 @@ bool GitClient::gitCloneAndCheckoutBranch() {
     return false;
 }
 
+QStringList GitClient::gitShowReason() {
+    QStringList lst;
+    if (QDir(m_customerRepository).exists()) {
+        // %h: commit (short form)
+        // %s: commit message
+        // %cI: commit date, strict ISO 8601 format
+        Command c("git show -s --format=\"c=%h m=%s d=%cI\"");
+        if (c.execute(m_customerRepository)) {
+            QString const s = c.getCommandResult().trimmed();
+            int const c = s.indexOf("c=");
+            int const m = s.indexOf("m=");
+            int const d = s.indexOf("d=");
+            QString commit{""}, msg{""}, date{""};
+            if (c != -1) {
+                int start = c + 2;
+                if (m >= start) {
+                    int length = m - start;
+                    commit = s.mid(start, length).trimmed();
+
+                    start = m + 2;
+                    if (d >= start) {
+                        length = d - start;
+                        msg = s.mid(start, length).trimmed();
+
+                        start = d + 2;
+                        date = s.mid(start);
+                    }
+                }
+
+                if (!commit.isEmpty() && !msg.isEmpty() && !date.isEmpty()) {
+                    lst << commit << msg << date;
+                }
+            }
+        }
+    } else {
+        qCritical() << "CUSTOMER_REPOSITORY" << m_customerRepository
+                    << "DOES NOT EXIST";
+    }
+    return lst;
+}
+
 /*
  Zu beachten: wird eine datei neu hinzugefuegt (git add/commit) dann aber gleich
  wieder geloscht, so wird sie im diff nicht angezeigt.

git/git_client.h

@@ -50,6 +50,7 @@ class GitClient : public QObject {
     std::optional<QStringList> gitMerge();
 
     QString gitLastCommit(QString fileName);
+    QStringList gitShowReason();
     QString gitBlob(QString fileName);
     QString gitCommitForBlob(QString blob);
     bool gitIsFileTracked(QString file2name);