ClearCase: Support systems without external diff

CC's internal diff is worthless, just disable multiple files actions

Change-Id: Ia8541e6edc6582777fc141da849819a5a11543b6
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@nokia.com>

src/plugins/clearcase/clearcaseplugin.cpp

@@ -706,8 +706,13 @@ void ClearCasePlugin::undoHijackCurrent()
     const QString fileName = state.relativeCurrentFile();
 
     bool keep = false;
+    bool askKeep = true;
+    if (m_settings.extDiffAvailable) {
         QString diffres = diffExternal(ccGetFileVersion(state.topLevel(), fileName), fileName);
-    if (diffres.at(0) != QLatin1Char('F')) { // Files are identical
+        if (diffres.at(0) == QLatin1Char('F')) // Files are identical
+            askKeep = false;
+    }
+    if (askKeep) {
         Ui::UndoCheckOut unhijackUi;
         QDialog unhijackDlg;
         unhijackUi.setupUi(&unhijackDlg);
@@ -749,6 +754,11 @@ void ClearCasePlugin::ccDiffWithPred(const QStringList &files)
             diffGraphical(file);
         return; // done here, diff is opened in a new window
     }
+    if (!m_settings.extDiffAvailable) {
+        VcsBase::VcsBaseOutputWindow::instance()->appendError(
+                    tr("External diff is required to compare multiple files."));
+        return;
+    }
     QString result;
     foreach (const QString &file, files) {
         if (m_statusMap->value(QDir::fromNativeSeparators(file)).status == FileStatus::Hijacked)
@@ -814,6 +824,11 @@ void ClearCasePlugin::diffActivity()
     QTC_ASSERT(state.hasTopLevel(), return);
     if (ClearCase::Constants::debug)
         qDebug() << Q_FUNC_INFO;
+    if (!m_settings.extDiffAvailable) {
+        VcsBase::VcsBaseOutputWindow::instance()->appendError(
+                    tr("External diff is required to compare multiple files."));
+        return;
+    }
     QString topLevel = state.topLevel();
     QString activity = QInputDialog::getText(0, tr("Enter Activity"), tr("Activity Name"), QLineEdit::Normal, m_activity);
     if (activity.isEmpty())
@@ -1148,6 +1163,7 @@ void ClearCasePlugin::describe(const QString &source, const QString &changeNr)
     const ClearCaseResponse response =
             runCleartool(topLevel, args, m_settings.timeOutMS(), 0, codec);
     description = response.stdOut;
+    if (m_settings.extDiffAvailable)
         description += diffExternal(id);
 
     // Re-use an existing view if possible to support

src/plugins/clearcase/clearcasesettings.cpp

@@ -98,6 +98,7 @@ void ClearCaseSettings::fromSettings(QSettings *settings)
     promptToCheckIn = settings->value(QLatin1String(promptToCheckInKeyC), false).toBool();
     disableIndexer = settings->value(QLatin1String(disableIndexerKeyC), false).toBool();
     indexOnlyVOBs = settings->value(QLatin1String(indexOnlyVOBsC), QString()).toString();
+    extDiffAvailable = !Utils::Environment::systemEnvironment().searchInPath(QLatin1String("diff")).isEmpty();
     settings->beginGroup(QLatin1String(totalFilesKeyC));
     foreach (const QString &view, settings->childKeys())
         totalFiles[view] = settings->value(view).toInt();

src/plugins/clearcase/clearcasesettings.h

@@ -73,6 +73,7 @@ public:
     bool promptToCheckIn;
     bool disableIndexer;
     QString indexOnlyVOBs;
+    bool extDiffAvailable;
     QHash<QString, int> totalFiles;
 };
 

src/plugins/clearcase/settingspage.cpp

@@ -37,6 +37,7 @@
 
 #include <coreplugin/icore.h>
 #include <extensionsystem/pluginmanager.h>
+#include <utils/environment.h>
 #include <utils/pathchooser.h>
 
 #include <QCoreApplication>
@@ -71,6 +72,7 @@ ClearCaseSettings SettingsPageWidget::settings() const
     rc.disableIndexer = m_ui.disableIndexerCheckBox->isChecked();
     rc.diffArgs = m_ui.diffArgsEdit->text();
     rc.indexOnlyVOBs = m_ui.indexOnlyVOBsEdit->text();
+    rc.extDiffAvailable = m_ui.externalDiffRadioButton->isEnabled();
     return rc;
 }
 
@@ -79,16 +81,23 @@ void SettingsPageWidget::setSettings(const ClearCaseSettings &s)
     m_ui.commandPathChooser->setPath(s.ccCommand);
     m_ui.timeOutSpinBox->setValue(s.timeOutS);
     m_ui.autoCheckOutCheckBox->setChecked(s.autoCheckOut);
-    switch (s.diffType) {
-    case GraphicalDiff:
-        m_ui.graphicalDiffRadioButton->setChecked(true);
-        m_ui.diffWidget->setEnabled(false);
-        break;
-    case ExternalDiff:
-        m_ui.externalDiffRadioButton->setChecked(true);
-        m_ui.diffWidget->setEnabled(true);
-        break;
+    bool extDiffAvailable = !Utils::Environment::systemEnvironment().searchInPath(QLatin1String("diff")).isEmpty();
+    if (extDiffAvailable) {
+        m_ui.diffWarningLabel->setVisible(false);
+    } else {
+        QString diffWarning = tr("In order to use External diff, 'diff' command needs to be accessible.");
+#ifdef Q_OS_WIN
+        diffWarning.append(tr(" DiffUtils is available for free download "
+                              "<a href=\"http://gnuwin32.sourceforge.net/packages/diffutils.htm\">here</a>. "
+                              "Please extract it to a directory in your PATH."));
+#endif
+        m_ui.diffWarningLabel->setText(diffWarning);
+        m_ui.externalDiffRadioButton->setEnabled(false);
     }
+    if (extDiffAvailable && s.diffType == ExternalDiff)
+        m_ui.externalDiffRadioButton->setChecked(true);
+    else
+        m_ui.graphicalDiffRadioButton->setChecked(true);
     m_ui.autoAssignActivityCheckBox->setChecked(s.autoAssignActivityName);
     m_ui.historyCountSpinBox->setValue(s.historyCount);
     m_ui.promptCheckBox->setChecked(s.promptToCheckIn);

src/plugins/clearcase/settingspage.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>363</width>
-    <height>384</height>
+    <height>403</height>
    </rect>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
@@ -39,11 +39,17 @@
       <string>Diff</string>
      </property>
      <layout class="QFormLayout" name="formLayout">
+      <property name="fieldGrowthPolicy">
+       <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
+      </property>
       <item row="0" column="0">
        <widget class="QRadioButton" name="graphicalDiffRadioButton">
         <property name="text">
          <string>&amp;Graphical (Single file only)</string>
         </property>
+        <property name="checked">
+         <bool>true</bool>
+        </property>
        </widget>
       </item>
       <item row="1" column="0">
@@ -55,6 +61,9 @@
       </item>
       <item row="1" column="1">
        <widget class="QWidget" name="diffWidget" native="true">
+        <property name="enabled">
+         <bool>false</bool>
+        </property>
         <layout class="QHBoxLayout" name="horizontalLayout">
          <property name="margin">
           <number>0</number>
@@ -75,6 +84,53 @@
         </layout>
        </widget>
       </item>
+      <item row="2" column="0" colspan="2">
+       <widget class="QLabel" name="diffWarningLabel">
+        <property name="palette">
+         <palette>
+          <active>
+           <colorrole role="WindowText">
+            <brush brushstyle="SolidPattern">
+             <color alpha="255">
+              <red>255</red>
+              <green>0</green>
+              <blue>0</blue>
+             </color>
+            </brush>
+           </colorrole>
+          </active>
+          <inactive>
+           <colorrole role="WindowText">
+            <brush brushstyle="SolidPattern">
+             <color alpha="255">
+              <red>255</red>
+              <green>0</green>
+              <blue>0</blue>
+             </color>
+            </brush>
+           </colorrole>
+          </inactive>
+          <disabled>
+           <colorrole role="WindowText">
+            <brush brushstyle="SolidPattern">
+             <color alpha="255">
+              <red>68</red>
+              <green>96</green>
+              <blue>92</blue>
+             </color>
+            </brush>
+           </colorrole>
+          </disabled>
+         </palette>
+        </property>
+        <property name="text">
+         <string/>
+        </property>
+        <property name="wordWrap">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>