Terminal: Add remote devices to shell selection

Change-Id: Id28471aaf3e91ef493f48ab28207230f3fb513c2
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/terminal/shellmodel.cpp

@@ -0,0 +1,111 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
+
+#include "shellmodel.h"
+
+#include <utils/algorithm.h>
+#include <utils/environment.h>
+#include <utils/filepath.h>
+
+#include <QFileIconProvider>
+#include <QStandardPaths>
+
+namespace Terminal::Internal {
+
+using namespace Utils;
+
+FilePaths availableShells()
+{
+    if (Utils::HostOsInfo::isWindowsHost()) {
+        FilePaths shells;
+
+        FilePath comspec = FilePath::fromUserInput(qtcEnvironmentVariable("COMSPEC"));
+        shells << comspec;
+
+        if (comspec.fileName() != "cmd.exe") {
+            FilePath cmd = FilePath::fromUserInput(QStandardPaths::findExecutable("cmd.exe"));
+            shells << cmd;
+        }
+
+        FilePath powershell = FilePath::fromUserInput(
+            QStandardPaths::findExecutable("powershell.exe"));
+        if (powershell.exists())
+            shells << powershell;
+
+        FilePath bash = FilePath::fromUserInput(QStandardPaths::findExecutable("bash.exe"));
+        if (bash.exists())
+            shells << bash;
+
+        FilePath git_bash = FilePath::fromUserInput(QStandardPaths::findExecutable("git.exe"));
+        if (git_bash.exists())
+            shells << git_bash.parentDir().parentDir().pathAppended("usr/bin/bash.exe");
+
+        FilePath msys2_bash = FilePath::fromUserInput(QStandardPaths::findExecutable("msys2.exe"));
+        if (msys2_bash.exists())
+            shells << msys2_bash.parentDir().pathAppended("usr/bin/bash.exe");
+
+        return shells;
+    } else {
+        FilePath shellsFile = FilePath::fromString("/etc/shells");
+        const auto shellFileContent = shellsFile.fileContents();
+        QTC_ASSERT_EXPECTED(shellFileContent, return {});
+
+        QString shellFileContentString = QString::fromUtf8(*shellFileContent);
+
+        // Filter out comments ...
+        const QStringList lines
+            = Utils::filtered(shellFileContentString.split('\n', Qt::SkipEmptyParts),
+                              [](const QString &line) { return !line.trimmed().startsWith('#'); });
+
+        // Convert lines to file paths ...
+        const FilePaths shells = Utils::transform(lines, [](const QString &line) {
+            return FilePath::fromUserInput(line.trimmed());
+        });
+
+        // ... and filter out non-existing shells.
+        return Utils::filtered(shells, [](const FilePath &shell) { return shell.exists(); });
+    }
+}
+
+struct ShellModelPrivate
+{
+    QList<ShellModelItem> localShells;
+};
+
+ShellModel::ShellModel(QObject *parent)
+    : QObject(parent)
+    , d(new ShellModelPrivate())
+{
+    QFileIconProvider iconProvider;
+
+    const FilePaths shells = availableShells();
+    for (const FilePath &shell : shells) {
+        ShellModelItem item;
+        item.icon = iconProvider.icon(shell.toFileInfo());
+        item.name = shell.toUserOutput();
+        item.openParameters.shellCommand = {shell, {}};
+        d->localShells << item;
+    }
+}
+
+ShellModel::~ShellModel() = default;
+
+QList<ShellModelItem> ShellModel::local() const
+{
+    return d->localShells;
+}
+
+QList<ShellModelItem> ShellModel::remote() const
+{
+    const auto deviceCmds = Utils::Terminal::Hooks::instance().getTerminalCommandsForDevicesHook()();
+
+    const QList<ShellModelItem> deviceItems
+        = Utils::transform(deviceCmds,
+                           [](const Utils::Terminal::NameAndCommandLine &item) -> ShellModelItem {
+                               return ShellModelItem{item.name, {}, {item.commandLine, {}, {}}};
+                           });
+
+    return deviceItems;
+}
+
+} // namespace Terminal::Internal