docker-plugin: fix daemon state

Changed daemon state to actually check the docker runtime to determine
if its available or not.

Change-Id: I9e183658dfc7c34e229aec2a332cf303793284e5
Reviewed-by: hjk <hjk@qt.io>

9 files changed, 223 insertions, 29 deletions

diff --git a/.clang-format b/.clang-format
index 97f7f2b234..7077765291 100644
--- a/.clang-format
+++ b/.clang-format
@@ -99,6 +99,7 @@ PenaltyExcessCharacter: 50
 PenaltyReturnTypeOnItsOwnLine: 300
 PointerAlignment: Right
 ReflowComments:  false
+RemoveBracesLLVM: true
 SortIncludes:    true
 SortUsingDeclarations: true
 SpaceAfterCStyleCast: true
diff --git a/src/plugins/docker/CMakeLists.txt b/src/plugins/docker/CMakeLists.txt
index 3153b10bb1..68903c630b 100644
--- a/src/plugins/docker/CMakeLists.txt
+++ b/src/plugins/docker/CMakeLists.txt
@@ -2,6 +2,7 @@ add_qtc_plugin(Docker
   PLUGIN_DEPENDS Core ProjectExplorer QtSupport
   SOURCES
     docker_global.h
+    dockerapi.cpp dockerapi.h
     dockerbuildstep.cpp dockerbuildstep.h
     dockerconstants.h
     dockerdevice.cpp dockerdevice.h
diff --git a/src/plugins/docker/docker.qbs b/src/plugins/docker/docker.qbs
index 3c6680604a..1e79fa8f5b 100644
--- a/src/plugins/docker/docker.qbs
+++ b/src/plugins/docker/docker.qbs
@@ -12,6 +12,8 @@ QtcPlugin {
 
     files: [
         "docker_global.h",
+        "dockerapi.cpp",
+        "dockerapi.h",
         "dockerbuildstep.cpp",
         "dockerbuildstep.h",
         "dockerconstants.h",
diff --git a/src/plugins/docker/dockerapi.cpp b/src/plugins/docker/dockerapi.cpp
new file mode 100644
index 0000000000..b733b18320
--- /dev/null
+++ b/src/plugins/docker/dockerapi.cpp
@@ -0,0 +1,121 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "dockerapi.h"
+
+#include <coreplugin/progressmanager/progressmanager.h>
+#include <utils/qtcprocess.h>
+
+#include <QLoggingCategory>
+#include <QtConcurrent>
+
+#include <thread>
+
+Q_LOGGING_CATEGORY(dockerApiLog, "qtc.docker.api", QtDebugMsg);
+
+namespace Docker {
+namespace Internal {
+
+using namespace Utils;
+
+DockerApi *s_instance{nullptr};
+
+DockerApi::DockerApi()
+{
+    s_instance = this;
+}
+
+DockerApi *DockerApi::instance()
+{
+    return s_instance;
+}
+
+bool DockerApi::canConnect()
+{
+    QtcProcess process;
+    FilePath dockerExe = findDockerClient();
+    if (dockerExe.isEmpty() || !dockerExe.isExecutableFile())
+        return false;
+
+    bool result = false;
+
+    process.setCommand(CommandLine(dockerExe, QStringList{"info"}));
+    connect(&process, &QtcProcess::done, [&process, &result] {
+        qCInfo(dockerApiLog) << "'docker info' result:\n" << qPrintable(process.allOutput());
+        if (process.result() == ProcessResult::FinishedWithSuccess)
+            result = true;
+    });
+
+    process.start();
+    process.waitForFinished();
+
+    return result;
+}
+
+void DockerApi::checkCanConnect()
+{
+    std::unique_lock lk(m_daemonCheckGuard, std::try_to_lock);
+    if (!lk.owns_lock())
+        return;
+
+    m_dockerDaemonAvailable = nullopt;
+    dockerDaemonAvailableChanged();
+
+    auto future = QtConcurrent::run(QThreadPool::globalInstance(), [lk = std::move(lk), this] {
+        m_dockerDaemonAvailable = canConnect();
+        dockerDaemonAvailableChanged();
+    });
+
+    Core::ProgressManager::addTask(future, tr("Checking docker daemon"), "DockerPlugin");
+}
+
+void DockerApi::recheckDockerDaemon()
+{
+    QTC_ASSERT(s_instance, return );
+    s_instance->checkCanConnect();
+}
+
+Utils::optional<bool> DockerApi::dockerDaemonAvailable()
+{
+    if (!m_dockerDaemonAvailable.has_value())
+        checkCanConnect();
+    return m_dockerDaemonAvailable;
+}
+
+Utils::optional<bool> DockerApi::isDockerDaemonAvailable()
+{
+    QTC_ASSERT(s_instance, return nullopt);
+    return s_instance->dockerDaemonAvailable();
+}
+
+FilePath DockerApi::findDockerClient()
+{
+    if (m_dockerExecutable.isEmpty() || m_dockerExecutable.isExecutableFile())
+        m_dockerExecutable = FilePath::fromString("docker").searchInPath();
+    return m_dockerExecutable;
+}
+
+} // namespace Internal
+} // namespace Docker
diff --git a/src/plugins/docker/dockerapi.h b/src/plugins/docker/dockerapi.h
new file mode 100644
index 0000000000..186a5ccfd9
--- /dev/null
+++ b/src/plugins/docker/dockerapi.h
@@ -0,0 +1,68 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <QMutex>
+#include <QObject>
+
+#include <utils/filepath.h>
+#include <utils/guard.h>
+#include <utils/optional.h>
+
+namespace Docker {
+namespace Internal {
+
+class DockerApi : public QObject
+{
+    Q_OBJECT
+
+public:
+    DockerApi();
+
+    static DockerApi *instance();
+
+    bool canConnect();
+    void checkCanConnect();
+    static void recheckDockerDaemon();
+
+signals:
+    void dockerDaemonAvailableChanged();
+
+public:
+    Utils::optional<bool> dockerDaemonAvailable();
+    static Utils::optional<bool> isDockerDaemonAvailable();
+
+private:
+    Utils::FilePath findDockerClient();
+
+private:
+    Utils::FilePath m_dockerExecutable;
+    Utils::optional<bool> m_dockerDaemonAvailable;
+    QMutex m_daemonCheckGuard;
+};
+
+} // namespace Internal
+} // namespace Docker
diff --git a/src/plugins/docker/dockerdevice.cpp b/src/plugins/docker/dockerdevice.cpp
index 314119ead3..772d9c541a 100644
--- a/src/plugins/docker/dockerdevice.cpp
+++ b/src/plugins/docker/dockerdevice.cpp
@@ -317,7 +317,7 @@ void DockerDevice::updateContainerAccess() const
 
 void DockerDevicePrivate::stopCurrentContainer()
 {
-    if (m_container.isEmpty() || !DockerPlugin::isDaemonRunning().value_or(false))
+    if (m_container.isEmpty() || !DockerApi::isDockerDaemonAvailable().value_or(false))
         return;
 
     if (m_shell) {
@@ -412,7 +412,7 @@ void DockerDevicePrivate::startContainer()
         // negative exit codes indicate problems like no docker daemon, missing permissions,
         // no shell and seem to result in exit codes 125+
         if (exitCode > 120) {
-            DockerPlugin::setGlobalDaemonState(false);
+            DockerApi::recheckDockerDaemon();
             LOG("DOCKER DAEMON NOT RUNNING?");
             MessageManager::writeFlashing(tr("Docker daemon appears to be not running. "
                                              "Verify daemon is up and running and reset the "
@@ -428,12 +428,10 @@ void DockerDevicePrivate::startContainer()
     m_shell->waitForStarted();
 
     if (!m_shell->isRunning()) {
-        DockerPlugin::setGlobalDaemonState(false);
+        DockerApi::recheckDockerDaemon();
         LOG("DOCKER SHELL FAILED");
         return;
     }
-
-    DockerPlugin::setGlobalDaemonState(true);
 }
 
 void DockerDevicePrivate::updateContainerAccess()
@@ -441,7 +439,7 @@ void DockerDevicePrivate::updateContainerAccess()
     if (!m_container.isEmpty())
         return;
 
-    if (DockerPlugin::isDaemonRunning().value_or(true) == false)
+    if (DockerApi::isDockerDaemonAvailable().value_or(true) == false)
         return;
 
     if (m_shell)
@@ -899,7 +897,7 @@ bool DockerDevice::writeFileContents(const FilePath &filePath, const QByteArray
 void DockerDevice::runProcess(QtcProcess &process) const
 {
     updateContainerAccess();
-    if (!DockerPlugin::isDaemonRunning().value_or(false))
+    if (!DockerApi::isDockerDaemonAvailable().value_or(false))
         return;
     if (d->m_container.isEmpty()) {
         LOG("No container set to run " << process.commandLine().toUserOutput());
@@ -979,7 +977,7 @@ void DockerDevicePrivate::fetchSystemEnviroment()
 
 bool DockerDevicePrivate::runInContainer(const CommandLine &cmd) const
 {
-    if (!DockerPlugin::isDaemonRunning().value_or(false))
+    if (!DockerApi::isDockerDaemonAvailable().value_or(false))
         return false;
     CommandLine dcmd{"docker", {"exec", m_container}};
     dcmd.addCommandLineAsArgs(cmd);
@@ -997,7 +995,7 @@ bool DockerDevicePrivate::runInContainer(const CommandLine &cmd) const
 
 bool DockerDevicePrivate::runInShell(const CommandLine &cmd) const
 {
-    if (!QTC_GUARD(DockerPlugin::isDaemonRunning().value_or(false))) {
+    if (!QTC_GUARD(DockerApi::isDockerDaemonAvailable().value_or(false))) {
         LOG("No daemon. Could not run " << cmd.toUserOutput());
         return false;
     }
@@ -1023,7 +1021,7 @@ static QByteArray randomHex()
 
 QByteArray DockerDevicePrivate::outputForRunInShell(const CommandLine &cmd) const
 {
-    if (!DockerPlugin::isDaemonRunning().value_or(false))
+    if (!DockerApi::isDockerDaemonAvailable().value_or(false))
         return {};
     QTC_ASSERT(m_shell && m_shell->isRunning(), return {});
     QMutexLocker l(&m_shellMutex);
diff --git a/src/plugins/docker/dockerdevicewidget.cpp b/src/plugins/docker/dockerdevicewidget.cpp
index 5409bc31d1..a652cc27c3 100644
--- a/src/plugins/docker/dockerdevicewidget.cpp
+++ b/src/plugins/docker/dockerdevicewidget.cpp
@@ -71,13 +71,17 @@ DockerDeviceWidget::DockerDeviceWidget(const IDevice::Ptr &device)
         "It will be automatically re-evaluated next time access is needed."));
 
     m_daemonState = new QLabel;
-    updateDaemonStateTexts();
 
-    connect(m_daemonReset, &QToolButton::clicked, this, [this, dockerDevice] {
-        DockerPlugin::setGlobalDaemonState(Utils::nullopt);
+    connect(DockerApi::instance(), &DockerApi::dockerDaemonAvailableChanged, this, [this]{
         updateDaemonStateTexts();
     });
 
+    updateDaemonStateTexts();
+
+    connect(m_daemonReset, &QToolButton::clicked, this, [] {
+        DockerApi::recheckDockerDaemon();
+    });
+
     m_runAsOutsideUser = new QCheckBox(tr("Run as outside user"));
     m_runAsOutsideUser->setToolTip(tr("Uses user ID and group ID of the user running Qt Creator "
                                       "in the docker container."));
@@ -150,7 +154,7 @@ DockerDeviceWidget::DockerDeviceWidget(const IDevice::Ptr &device)
 
         m_kitItemDetector.autoDetect(dockerDevice->id().toString(), searchPaths());
 
-        if (DockerPlugin::isDaemonRunning().value_or(false) == false)
+        if (DockerApi::instance()->dockerDaemonAvailable().value_or(false) == false)
             logView->append(tr("Docker daemon appears to be not running."));
         else
             logView->append(tr("Docker daemon appears to be running."));
@@ -208,7 +212,7 @@ DockerDeviceWidget::DockerDeviceWidget(const IDevice::Ptr &device)
 
 void DockerDeviceWidget::updateDaemonStateTexts()
 {
-    Utils::optional<bool> daemonState = DockerPlugin::isDaemonRunning();
+    Utils::optional<bool> daemonState = DockerApi::instance()->dockerDaemonAvailable();
     if (!daemonState.has_value()) {
         m_daemonReset->setIcon(Icons::INFO.icon());
         m_daemonState->setText(tr("Daemon state not evaluated."));
diff --git a/src/plugins/docker/dockerplugin.cpp b/src/plugins/docker/dockerplugin.cpp
index d195c81d6b..3c07eb2985 100644
--- a/src/plugins/docker/dockerplugin.cpp
+++ b/src/plugins/docker/dockerplugin.cpp
@@ -27,6 +27,7 @@
 
 #include "dockerconstants.h"
 
+#include "dockerapi.h"
 #include "dockerbuildstep.h"
 #include "dockerdevice.h"
 #include "dockersettings.h"
@@ -43,13 +44,15 @@ namespace Internal {
 class DockerPluginPrivate
 {
 public:
-//    DockerSettings settings;
-//    DockerOptionsPage optionsPage{&settings};
+    // DockerSettings settings;
+    // DockerOptionsPage optionsPage{&settings};
 
     DockerDeviceFactory deviceFactory;
 
-//    DockerBuildStepFactory buildStepFactory;
+    // DockerBuildStepFactory buildStepFactory;
     Utils::optional<bool> daemonRunning;
+
+    DockerApi dockerApi;
 };
 
 static DockerPlugin *s_instance = nullptr;
@@ -59,16 +62,10 @@ DockerPlugin::DockerPlugin()
     s_instance = this;
 }
 
-// Utils::null_opt for not evaluated, true or false if it had been evaluated already
-Utils::optional<bool> DockerPlugin::isDaemonRunning()
-{
-    return s_instance ? s_instance->d->daemonRunning : Utils::nullopt;
-}
-
-void DockerPlugin::setGlobalDaemonState(Utils::optional<bool> state)
+DockerApi *DockerPlugin::dockerApi()
 {
-    QTC_ASSERT(s_instance, return);
-    s_instance->d->daemonRunning = state;
+    QTC_ASSERT(s_instance, return nullptr);
+    return &s_instance->d->dockerApi;
 }
 
 DockerPlugin::~DockerPlugin()
diff --git a/src/plugins/docker/dockerplugin.h b/src/plugins/docker/dockerplugin.h
index aa9c093556..7eb1d3b10b 100644
--- a/src/plugins/docker/dockerplugin.h
+++ b/src/plugins/docker/dockerplugin.h
@@ -25,6 +25,8 @@
 
 #pragma once
 
+#include "dockerapi.h"
+
 #include <extensionsystem/iplugin.h>
 
 #include <utils/optional.h>
@@ -36,11 +38,11 @@ class DockerPlugin final : public ExtensionSystem::IPlugin
 {
     Q_OBJECT
     Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "Docker.json")
+
 public:
     DockerPlugin();
 
-    static Utils::optional<bool> isDaemonRunning();
-    static void setGlobalDaemonState(Utils::optional<bool> state);
+    static DockerApi *dockerApi();
 
 private:
     ~DockerPlugin() final;