kde-plasma/libksysguard: Add method CGroupDataModel::isAvailable

Backport upstream commit 76a3570ab2f9fab98aa6ccc9ceafbbc29323db06 to fix
a runtime crash happening without systemd.

KDE-Bug: https://bugs.kde.org/show_bug.cgi?id=433013
Reported-by: jospezial <jospezial@gmx.de>
Closes: https://bugs.gentoo.org/766755
Package-Manager: Portage-3.0.14, Repoman-3.0.2
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

2 files changed, 168 insertions, 0 deletions

diff --git a/kde-plasma/libksysguard/files/libksysguard-5.21.0-fix-non-systemd-crash.patch b/kde-plasma/libksysguard/files/libksysguard-5.21.0-fix-non-systemd-crash.patch
new file mode 100644
index 000000000000..ec7c57e133a3
--- /dev/null
+++ b/kde-plasma/libksysguard/files/libksysguard-5.21.0-fix-non-systemd-crash.patch
@@ -0,0 +1,96 @@
+From 76a3570ab2f9fab98aa6ccc9ceafbbc29323db06 Mon Sep 17 00:00:00 2001
+From: David Edmundson <kde@davidedmundson.co.uk>
+Date: Thu, 4 Feb 2021 10:47:43 +0000
+Subject: [PATCH] Add method CGroupDataModel::isAvailable
+
+This returns true if the root is pointing to a valid path. The idea
+being that non-systemd systems won't have applications scoped correctly,
+nor a relevant user slice.
+
+By communicating this we can dislpay the entry as not working in the UI.
+
+
+(cherry picked from commit 6d42960456f145d178579a1debb726bd0c7dcee6)
+---
+ processcore/cgroup_data_model.cpp | 21 ++++++++++++++++++++-
+ processcore/cgroup_data_model.h   |  5 +++++
+ 2 files changed, 25 insertions(+), 1 deletion(-)
+
+diff --git a/processcore/cgroup_data_model.cpp b/processcore/cgroup_data_model.cpp
+index 46a36c3..4278a2c 100644
+--- a/processcore/cgroup_data_model.cpp
++++ b/processcore/cgroup_data_model.cpp
+@@ -48,6 +48,7 @@ public:
+     QHash<QString, KSysGuard::ProcessAttribute* > m_availableAttributes;
+     QVector<KSysGuard::ProcessAttribute* > m_enabledAttributes;
+ 
++    bool m_available = false;
+     QString m_root;
+     QScopedPointer<CGroup> m_rootGroup;
+ 
+@@ -367,9 +368,22 @@ void CGroupDataModel::setRoot(const QString &root)
+         return;
+     }
+     d->m_root = root;
+-    d->m_rootGroup.reset(new CGroup(root));
+     emit rootChanged();
+     QMetaObject::invokeMethod(this, [this] {update();}, Qt::QueuedConnection);
++
++    const QString path = CGroup::cgroupSysBasePath() + root;
++    bool available = QFile::exists(path);
++
++    if (available) {
++        d->m_rootGroup.reset(new CGroup(root));
++    } else {
++        d->m_rootGroup.reset();
++    }
++
++    if (available != d->m_available) {
++        d->m_available = available;
++        emit availableChanged();
++    }
+ }
+ 
+ void CGroupDataModel::update()
+@@ -443,6 +457,11 @@ void CGroupDataModel::update(CGroup *node)
+     }
+ }
+ 
++bool CGroupDataModel::isAvailable() const
++{
++    return d->m_available;
++}
++
+ QVector<Process*> CGroupDataModelPrivate::processesFor(CGroup *app)
+ {
+     if (m_processMap.contains(app)) {
+diff --git a/processcore/cgroup_data_model.h b/processcore/cgroup_data_model.h
+index 5ce58aa..1f7d28d 100644
+--- a/processcore/cgroup_data_model.h
++++ b/processcore/cgroup_data_model.h
+@@ -59,6 +59,8 @@ class Q_DECL_EXPORT CGroupDataModel : public QAbstractItemModel
+      */
+     Q_PROPERTY(QString setRoot READ root WRITE setRoot NOTIFY rootChanged)
+ 
++    Q_PROPERTY(bool available READ isAvailable NOTIFY availableChanged)
++
+ public:
+     CGroupDataModel(QObject *parent = nullptr);
+     CGroupDataModel(const QString &root, QObject *parent = nullptr);
+@@ -114,10 +116,13 @@ public:
+      */
+     void update();
+ 
++    bool isAvailable() const;
++
+ Q_SIGNALS:
+     void enabledAttributesChanged();
+     void enabledChanged();
+     void rootChanged();
++    void availableChanged();
+ 
+ protected:
+     virtual bool filterAcceptsCGroup(const QString &id);
+-- 
+GitLab
+
diff --git a/kde-plasma/libksysguard/libksysguard-5.21.0-r1.ebuild b/kde-plasma/libksysguard/libksysguard-5.21.0-r1.ebuild
new file mode 100644
index 000000000000..91254d1119c0
--- /dev/null
+++ b/kde-plasma/libksysguard/libksysguard-5.21.0-r1.ebuild
@@ -0,0 +1,72 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+ECM_DESIGNERPLUGIN="true"
+ECM_TEST="true"
+KFMIN=5.78.0
+PVCUT=$(ver_cut 1-3)
+QTMIN=5.15.2
+VIRTUALX_REQUIRED="test"
+inherit ecm kde.org
+
+DESCRIPTION="Task management and system monitoring library"
+LICENSE="LGPL-2+"
+SLOT="5/9"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
+IUSE="webengine X"
+
+RDEPEND="
+	>=dev-qt/qtdbus-${QTMIN}:5
+	>=dev-qt/qtdeclarative-${QTMIN}:5
+	>=dev-qt/qtgui-${QTMIN}:5
+	>=dev-qt/qtnetwork-${QTMIN}:5
+	>=dev-qt/qtwidgets-${QTMIN}:5
+	>=kde-frameworks/kauth-${KFMIN}:5
+	>=kde-frameworks/kcompletion-${KFMIN}:5
+	>=kde-frameworks/kconfig-${KFMIN}:5
+	>=kde-frameworks/kconfigwidgets-${KFMIN}:5
+	>=kde-frameworks/kcoreaddons-${KFMIN}:5
+	>=kde-frameworks/kdeclarative-${KFMIN}:5
+	>=kde-frameworks/ki18n-${KFMIN}:5
+	>=kde-frameworks/kjobwidgets-${KFMIN}:5
+	>=kde-frameworks/knewstuff-${KFMIN}:5
+	>=kde-frameworks/kpackage-${KFMIN}:5
+	>=kde-frameworks/kwidgetsaddons-${KFMIN}:5
+	>=kde-frameworks/kwindowsystem-${KFMIN}:5
+	sys-libs/zlib
+	webengine? (
+		>=dev-qt/qtwebchannel-${QTMIN}:5
+		>=dev-qt/qtwebengine-${QTMIN}:5
+	)
+	X? (
+		>=dev-qt/qtx11extras-${QTMIN}:5
+		x11-libs/libX11
+		x11-libs/libXres
+	)
+"
+DEPEND="${RDEPEND}
+	!<kde-plasma/plasma-workspace-5.18.80:5
+	>=kde-frameworks/kiconthemes-${KFMIN}:5
+	X? ( x11-base/xorg-proto )
+"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-5.16.0-no-detailed-mem-message.patch" # downstream info
+	"${FILESDIR}/${P}-fix-non-systemd-crash.patch" # bug 766755
+)
+
+src_configure() {
+	local mycmakeargs=(
+		$(cmake_use_find_package webengine Qt5WebChannel)
+		$(cmake_use_find_package webengine Qt5WebEngineWidgets)
+		$(cmake_use_find_package X X11)
+	)
+
+	ecm_src_configure
+}
+
+src_test() {
+	LC_NUMERIC="C" ecm_src_test # bug 695514
+}