forked from mirrors/0ad
wraitii
ee0d204bf6
JSAutoRequest is required before calling into most JSAPI methods, for GC reasons. Calling it is required and fragile as one must not forget. Further, SM52 and later make manipulating JSContext* dangerous as that can cross Compartment(Realm in SM68) barriers (and ScriptInterface now matches a Compartment). The solution to both problems is to avoid using JSContext* in 0 A.D. itself. To achieve this, a Request class is introduced, and must be used to access a JSContext* from a scriptInterface. Further, Request is passed to other ScriptInterface functions isntead of JSContext*, making it obvious that the caller has already called it, reducing errors and redundant JSAutoRequest calls. Only JSNative functions now get a naked JSContext* without protection, but the likelihood of forgetting a request is lower since many ScriptInterface functions now expect it. JSContext* is directly passed to JSAPI functions only. Part of the SM52 migration, stage: SM45 compatible Based on a patch by: Itms Tested By: Freagarach Refs #4893 Differential Revision: https://code.wildfiregames.com/D3088 This was SVN commit r24176.
114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
/* Copyright (C) 2020 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "ModInstaller.h"
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#include "lib/file/vfs/vfs_util.h"
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#include "ps/Filesystem.h"
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#include "ps/XML/Xeromyces.h"
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#include <fstream>
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CModInstaller::CModInstaller(const OsPath& modsdir, const OsPath& tempdir) :
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m_ModsDir(modsdir), m_TempDir(tempdir / "_modscache"), m_CacheDir("cache/")
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{
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m_VFS = CreateVfs();
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CreateDirectories(m_TempDir, 0700);
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}
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CModInstaller::~CModInstaller()
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{
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m_VFS.reset();
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DeleteDirectory(m_TempDir);
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}
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CModInstaller::ModInstallationResult CModInstaller::Install(
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const OsPath& mod,
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const std::shared_ptr<ScriptRuntime>& scriptRuntime,
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bool keepFile)
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{
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const OsPath modTemp = m_TempDir / mod.Basename() / mod.Filename().ChangeExtension(L".zip");
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CreateDirectories(modTemp.Parent(), 0700);
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if (keepFile)
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CopyFile(mod, modTemp, true);
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else
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wrename(mod, modTemp);
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// Load the mod to VFS
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if (m_VFS->Mount(m_CacheDir, m_TempDir / "") != INFO::OK)
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return FAIL_ON_VFS_MOUNT;
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CVFSFile modinfo;
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PSRETURN modinfo_status = modinfo.Load(m_VFS, m_CacheDir / modTemp.Basename() / "mod.json", false);
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m_VFS->Clear();
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if (modinfo_status != PSRETURN_OK)
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return FAIL_ON_MOD_LOAD;
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// Extract the name of the mod
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CStr modName;
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{
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ScriptInterface scriptInterface("Engine", "ModInstaller", scriptRuntime);
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ScriptInterface::Request rq(scriptInterface);
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JS::RootedValue json_val(rq.cx);
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if (!scriptInterface.ParseJSON(modinfo.GetAsString(), &json_val))
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return FAIL_ON_PARSE_JSON;
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JS::RootedObject json_obj(rq.cx, json_val.toObjectOrNull());
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JS::RootedValue name_val(rq.cx);
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if (!JS_GetProperty(rq.cx, json_obj, "name", &name_val))
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return FAIL_ON_EXTRACT_NAME;
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ScriptInterface::FromJSVal(rq, name_val, modName);
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if (modName.empty())
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return FAIL_ON_EXTRACT_NAME;
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}
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const OsPath modDir = m_ModsDir / modName;
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const OsPath modPath = modDir / (modName + ".zip");
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// Create a directory with the following structure:
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// mod-name/
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// mod-name.zip
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CreateDirectories(modDir, 0700);
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if (wrename(modTemp, modPath) != 0)
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return FAIL_ON_MOD_MOVE;
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DeleteDirectory(modTemp.Parent());
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#ifdef OS_WIN
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// On Windows, write the contents of mod.json to a separate file next to the archive:
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// mod-name/
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// mod-name.zip
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// mod.json
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std::ofstream mod_json((modDir / "mod.json").string8());
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if (mod_json.good())
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{
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mod_json << modinfo.GetAsString();
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mod_json.close();
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}
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#endif // OS_WIN
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m_InstalledMods.emplace_back(modName);
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return SUCCESS;
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}
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const std::vector<CStr>& CModInstaller::GetInstalledMods() const
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{
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return m_InstalledMods;
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}
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