Git: Support move/copy detection for blame

Fixes: QTCREATORBUG-20462
Change-Id: Ib2ea14de6a60691a1ed27cd07aac282557d69015
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/git/gitclient.cpp

@@ -588,6 +588,15 @@ public:
                                    tr("Ignore whitespace only changes.")),
                    settings.boolPointer(GitSettings::ignoreSpaceChangesInBlameKey));
 
+        const QList<ComboBoxItem> logChoices = {
+            ComboBoxItem(tr("No Move Detection"), ""),
+            ComboBoxItem(tr("Detect Moves Within File"), "-M"),
+            ComboBoxItem(tr("Detect Moves Between Files"), "-M -C"),
+            ComboBoxItem(tr("Detect Moves and Copies Between Files"), "-M -C -C")
+        };
+        mapSetting(addComboBox({}, logChoices),
+                   settings.intPointer(GitSettings::blameMoveDetection));
+
         addButton(tr("Reload"), Utils::Icons::RELOAD.icon());
     }
 };

src/plugins/git/gitsettings.cpp

@@ -37,6 +37,7 @@ const QLatin1String GitSettings::showTagsKey("ShowTags");
 const QLatin1String GitSettings::omitAnnotationDateKey("OmitAnnotationDate");
 const QLatin1String GitSettings::ignoreSpaceChangesInDiffKey("SpaceIgnorantDiff");
 const QLatin1String GitSettings::ignoreSpaceChangesInBlameKey("SpaceIgnorantBlame");
+const QLatin1String GitSettings::blameMoveDetection("BlameDetectMove");
 const QLatin1String GitSettings::diffPatienceKey("DiffPatience");
 const QLatin1String GitSettings::winSetHomeEnvironmentKey("WinSetHomeEnvironment");
 const QLatin1String GitSettings::gitkOptionsKey("GitKOptions");
@@ -56,6 +57,7 @@ GitSettings::GitSettings()
     declareKey(showTagsKey, false);
     declareKey(omitAnnotationDateKey, false);
     declareKey(ignoreSpaceChangesInDiffKey, true);
+    declareKey(blameMoveDetection, 0);
     declareKey(ignoreSpaceChangesInBlameKey, true);
     declareKey(diffPatienceKey, true);
     declareKey(winSetHomeEnvironmentKey, true);

src/plugins/git/gitsettings.h

@@ -48,6 +48,7 @@ public:
     static const QLatin1String omitAnnotationDateKey;
     static const QLatin1String ignoreSpaceChangesInDiffKey;
     static const QLatin1String ignoreSpaceChangesInBlameKey;
+    static const QLatin1String blameMoveDetection;
     static const QLatin1String diffPatienceKey;
     static const QLatin1String winSetHomeEnvironmentKey;
     static const QLatin1String gitkOptionsKey;

src/plugins/vcsbase/vcsbaseeditorconfig.cpp

@@ -255,16 +255,20 @@ QStringList VcsBaseEditorConfig::argumentsForOption(const OptionMapping &mapping
     if (action && action->isChecked())
         return mapping.options;
 
+    QStringList args;
     const QComboBox *cb = qobject_cast<const QComboBox *>(mapping.object);
-    if (cb) {
+    if (!cb)
-        const QString value = cb->itemData(cb->currentIndex()).toString();
-        QStringList args;
-        foreach (const QString &option, mapping.options)
-            args << option.arg(value);
         return args;
-    }
 
-    return QStringList();
+    const QString value = cb->itemData(cb->currentIndex()).toString();
+    if (value.isEmpty())
+        return args;
+
+    if (mapping.options.isEmpty())
+        args += value.split(' ');
+    else
+        args += mapping.options.first().arg(value);
+    return args;
 }
 
 void VcsBaseEditorConfig::updateMappedSettings()