CMakeProjectManager: Add package manager auto-setup

Adds CMAKE_PROJECT_INCLUDE_BEFORE as initial CMake parameters
with a path to a auto-setup.cmake script that will run
conan install if a conanfile.txt is found in the prject.

A project can have a local QtCreatorPackageManager.cmake file
that will be loaded if exists.

The auto setup can be controlled via the following CMake variables:

* QT_CREATOR_SKIP_PACKAGE_MANAGER_SETUP
* QT_CREATOR_SKIP_CONAN_SETUP
* QT_CREATOR_SKIP_VCPKG_SETUP

conan.cmake is taken from https://github.com/conan-io/cmake-conan
which takes care of the conan specific compiler cruft. License
is MIT.

Fixes: QTCREATORBUG-25362
Change-Id: I70a6e1abc5600851d048f1590ca24204ce52a503
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp

@@ -31,6 +31,8 @@
 #include "cmakeconfigitem.h"
 #include "cmakekitinformation.h"
 #include "cmakeprojectconstants.h"
+#include "cmakeprojectplugin.h"
+#include "cmakespecificsettings.h"
 #include "configmodel.h"
 #include "configmodelitemdelegate.h"
 
@@ -674,6 +676,14 @@ static QStringList defaultInitialCMakeArguments(const Kit *k, const QString buil
         initialArgs.append(QString::fromLatin1("-DCMAKE_BUILD_TYPE:String=%1").arg(buildType));
     }
 
+    Internal::CMakeSpecificSettings *settings
+        = Internal::CMakeProjectPlugin::projectTypeSpecificSettings();
+
+    // Package manager
+    if (settings->packageManagerAutoSetup())
+        initialArgs.append(QString::fromLatin1("-DCMAKE_PROJECT_INCLUDE_BEFORE:PATH=%1")
+                           .arg("%{IDE:ResourcePath}/package-manager/auto-setup.cmake"));
+
     // Cross-compilation settings:
     if (!isIos(k)) { // iOS handles this differently
         const QString sysRoot = SysRootKitAspect::sysRoot(k).toString();

src/plugins/cmakeprojectmanager/cmakespecificsettings.cpp

@@ -32,6 +32,7 @@ namespace {
 static const char SETTINGS_KEY[] = "CMakeSpecificSettings";
 static const char AFTER_ADD_FILE_ACTION_KEY[] = "ProjectPopupSetting";
 static const char NINJA_PATH[] = "NinjaPath";
+static const char PACKAGE_MANAGER_AUTO_SETUP[] = "PackageManagerAutoSetup";
 }
 
 void CMakeSpecificSettings::fromSettings(QSettings *settings)
@@ -43,12 +44,15 @@ void CMakeSpecificSettings::fromSettings(QSettings *settings)
 
     m_ninjaPath = Utils::FilePath::fromUserInput(
         settings->value(rootKey + NINJA_PATH, QString()).toString());
+
+    m_packageManagerAutoSetup = settings->value(rootKey + PACKAGE_MANAGER_AUTO_SETUP, true).toBool();
 }
 
 void CMakeSpecificSettings::toSettings(QSettings *settings) const
 {
     settings->beginGroup(QString(SETTINGS_KEY));
     settings->setValue(QString(AFTER_ADD_FILE_ACTION_KEY), static_cast<int>(m_afterAddFileToProjectSetting));
+    settings->setValue(QString(PACKAGE_MANAGER_AUTO_SETUP), m_packageManagerAutoSetup);
     settings->endGroup();
 }
 }

src/plugins/cmakeprojectmanager/cmakespecificsettings.h

@@ -50,9 +50,13 @@ public:
 
     Utils::FilePath ninjaPath() const { return m_ninjaPath; }
 
+    void setPackageManagerAutoSetup(bool checked) { m_packageManagerAutoSetup = checked; }
+    bool packageManagerAutoSetup() const { return m_packageManagerAutoSetup; }
+
 private:
     AfterAddFileAction m_afterAddFileToProjectSetting;
     Utils::FilePath m_ninjaPath;
+    bool m_packageManagerAutoSetup = true;
 };
 
 }

src/plugins/cmakeprojectmanager/cmakespecificsettingspage.cpp

@@ -70,6 +70,8 @@ CMakeSpecificSettingWidget::CMakeSpecificSettingWidget(CMakeSpecificSettings *se
         m_ui.neverCopyRadio->setChecked(true);
         break;
     }
+
+    m_ui.packageManagerAutoSetup->setChecked(settings->packageManagerAutoSetup());
 }
 
 void CMakeSpecificSettingWidget::apply()
@@ -77,6 +79,7 @@ void CMakeSpecificSettingWidget::apply()
     int popupSetting = m_ui.newFileAddedCopyToCpliSettingGroup->checkedId();
     m_settings->setAfterAddFileSetting(popupSetting == -1 ? AfterAddFileAction::ASK_USER
                                                   : static_cast<AfterAddFileAction>(popupSetting));
+    m_settings->setPackageManagerAutoSetup(m_ui.packageManagerAutoSetup->isChecked());
     m_settings->toSettings(Core::ICore::settings());
 }
 

src/plugins/cmakeprojectmanager/cmakespecificsettingspage.ui

@@ -60,6 +60,16 @@
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QCheckBox" name="packageManagerAutoSetup">
+     <property name="toolTip">
+      <string>Add the CMAKE_PROJECT_INCLUDE_BEFORE variable pointing to a CMake script that will install dependencies from the conanfile.txt, conanfile.py, or vcpkg.json file from the project source directory.</string>
+     </property>
+     <property name="text">
+      <string>Package manager auto setup</string>
+     </property>
+    </widget>
+   </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">