Vcs: Use additional tools paths from VCS systems

Use the additional tools installed by VCS tools in the generic
Vcs settings to find patch and ssh-askpass.

Task-number: QTCREATORBUG-11637
Change-Id: Icfd297af56710861316efbe2fec1f4dc440370b2
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/vcsbase/commonsettingspage.cpp

@@ -33,8 +33,11 @@
 #include "ui_commonsettingspage.h"
 
 #include <coreplugin/icore.h>
+#include <coreplugin/vcsmanager.h>
+
+#include <utils/environment.h>
+#include <utils/hostosinfo.h>
 
-#include <QDebug>
 #include <QCoreApplication>
 
 namespace VcsBase {
@@ -60,6 +63,11 @@ CommonSettingsWidget::CommonSettingsWidget(QWidget *parent) :
     m_ui->patchChooser->setToolTip(patchToolTip);
     m_ui->patchChooser->setExpectedKind(Utils::PathChooser::ExistingCommand);
     m_ui->patchChooser->setHistoryCompleter(QLatin1String("Vcs.PatchCommand.History"));
+
+    updatePath();
+
+    connect(Core::VcsManager::instance(), SIGNAL(configurationChanged(const IVersionControl*)),
+            this, SLOT(updatePath()));
 }
 
 CommonSettingsWidget::~CommonSettingsWidget()
@@ -105,6 +113,15 @@ QString CommonSettingsWidget::searchKeyWordMatchString() const
     return rc;
 }
 
+void CommonSettingsWidget::updatePath()
+{
+    Utils::Environment env = Utils::Environment::systemEnvironment();
+    QStringList toAdd = Core::VcsManager::additionalToolsPath();
+    env.appendOrSetPath(toAdd.join(QString(Utils::HostOsInfo::pathListSeparator())));
+    m_ui->patchChooser->setEnvironment(env);
+    m_ui->sshPromptChooser->setEnvironment(env);
+}
+
 // --------------- VcsBaseSettingsPage
 CommonOptionsPage::CommonOptionsPage(QObject *parent) :
     VcsBaseOptionsPage(parent)

src/plugins/vcsbase/commonsettingspage.h

@@ -55,6 +55,9 @@ public:
 
     QString searchKeyWordMatchString() const;
 
+private slots:
+    void updatePath();
+
 private:
     Ui::CommonSettingsPage *m_ui;
 };