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/****************************************************************************
**
** Copyright (C) 2017 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 "haskellmanager.h"
#include "ghcmod.h"
#include <utils/hostosinfo.h>
#include <QCoreApplication>
#include <QDir>
#include <QFileInfo>
#include <QSettings>
#include <unordered_map>
static const char kStackExecutableKey[] = "Haskell/StackExecutable";
using namespace Utils;
namespace Haskell {
namespace Internal {
class HaskellManagerPrivate
{
public:
std::unordered_map<FilePath, std::weak_ptr<AsyncGhcMod>> ghcModCache;
FilePath stackExecutable;
};
Q_GLOBAL_STATIC(HaskellManagerPrivate, m_d)
Q_GLOBAL_STATIC(HaskellManager, m_instance)
HaskellManager *HaskellManager::instance()
{
return m_instance;
}
FilePath HaskellManager::findProjectDirectory(const FilePath &filePath)
{
if (filePath.isEmpty())
return {};
QDir directory(filePath.toFileInfo().isDir() ? filePath.toString()
: filePath.parentDir().toString());
directory.setNameFilters({"stack.yaml", "*.cabal"});
directory.setFilter(QDir::Files | QDir::Readable);
do {
if (!directory.entryList().isEmpty())
return FilePath::fromString(directory.path());
} while (!directory.isRoot() && directory.cdUp());
return {};
}
std::shared_ptr<AsyncGhcMod> HaskellManager::ghcModForFile(const FilePath &filePath)
{
const FilePath projectPath = findProjectDirectory(filePath);
const auto cacheEntry = m_d->ghcModCache.find(projectPath);
if (cacheEntry != m_d->ghcModCache.cend()) {
if (cacheEntry->second.expired())
m_d->ghcModCache.erase(cacheEntry);
else
return cacheEntry->second.lock();
}
auto ghcmod = std::make_shared<AsyncGhcMod>(projectPath);
m_d->ghcModCache.insert(std::make_pair(projectPath, ghcmod));
return ghcmod;
}
FilePath defaultStackExecutable()
{
// stack from brew or the installer script from https://docs.haskellstack.org
// install to /usr/local/bin.
if (HostOsInfo::isAnyUnixHost())
return FilePath::fromString("/usr/local/bin/stack");
return FilePath::fromString("stack");
}
FilePath HaskellManager::stackExecutable()
{
return m_d->stackExecutable;
}
void HaskellManager::setStackExecutable(const FilePath &filePath)
{
if (filePath == m_d->stackExecutable)
return;
m_d->stackExecutable = filePath;
emit m_instance->stackExecutableChanged(m_d->stackExecutable);
}
void HaskellManager::readSettings(QSettings *settings)
{
m_d->stackExecutable = FilePath::fromString(
settings->value(kStackExecutableKey,
defaultStackExecutable().toString()).toString());
emit m_instance->stackExecutableChanged(m_d->stackExecutable);
}
void HaskellManager::writeSettings(QSettings *settings)
{
if (m_d->stackExecutable == defaultStackExecutable())
settings->remove(kStackExecutableKey);
else
settings->setValue(kStackExecutableKey, m_d->stackExecutable.toString());
}
QString HaskellManager::trLookingUp(const QString &name)
{
return QCoreApplication::translate("HaskellManager", "Looking up \"%1\"...").arg(name);
}
} // namespace Internal
} // namespace Haskell
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