mirror of https://github.com/Icinga/icinga2.git
274 lines
7.3 KiB
C++
274 lines
7.3 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program 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 this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "i2-config.h"
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using std::ifstream;
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using namespace icinga;
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vector<String> ConfigCompiler::m_IncludeSearchDirs;
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/**
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* Constructor for the ConfigCompiler class.
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*
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* @param path The path of the configuration file (or another name that
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* identifies the source of the configuration text).
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* @param input Input stream for the configuration file.
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* @param includeHandler Handler function for #include directives.
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*/
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ConfigCompiler::ConfigCompiler(const String& path, istream *input,
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HandleIncludeFunc includeHandler)
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: m_Path(path), m_Input(input), m_HandleInclude(includeHandler)
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{
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InitializeScanner();
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}
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/**
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* Destructor for the ConfigCompiler class.
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*/
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ConfigCompiler::~ConfigCompiler(void)
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{
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DestroyScanner();
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}
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/**
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* Reads data from the input stream. Used internally by the lexer.
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*
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* @param buffer Where to store data.
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* @param max_size The maximum number of bytes to read from the stream.
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* @returns The actual number of bytes read.
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*/
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size_t ConfigCompiler::ReadInput(char *buffer, size_t max_size)
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{
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m_Input->read(buffer, max_size);
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return static_cast<size_t>(m_Input->gcount());
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}
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/**
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* Retrieves the scanner object.
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*
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* @returns The scanner object.
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*/
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void *ConfigCompiler::GetScanner(void) const
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{
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return m_Scanner;
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}
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/**
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* Retrieves the result from the compiler.
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*
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* @returns A list of configuration items.
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*/
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vector<ConfigItem::Ptr> ConfigCompiler::GetResultObjects(void) const
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{
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return m_ResultObjects;
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}
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/**
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* Retrieves the resulting type objects from the compiler.
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*
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* @returns A list of type objects.
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*/
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vector<ConfigType::Ptr> ConfigCompiler::GetResultTypes(void) const
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{
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vector<ConfigType::Ptr> types;
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ConfigType::Ptr type;
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BOOST_FOREACH(tie(tuples::ignore, type), m_ResultTypes) {
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types.push_back(type);
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}
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return types;
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}
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/**
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* Retrieves the path for the input file.
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*
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* @returns The path.
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*/
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String ConfigCompiler::GetPath(void) const
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{
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return m_Path;
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}
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/**
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* Handles an include directive by calling the include handler callback
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* function.
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*
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* @param include The path from the include directive.
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* @param search Whether to search global include dirs.
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*/
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void ConfigCompiler::HandleInclude(const String& include, bool search)
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{
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String path = Utility::DirName(GetPath()) + "/" + include;
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vector<ConfigType::Ptr> types;
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m_HandleInclude(path, search, &m_ResultObjects, &types);
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BOOST_FOREACH(const ConfigType::Ptr& type, types) {
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AddType(type);
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}
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}
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/**
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* Handles the library directive.
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*
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* @param library The name of the library.
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*/
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void ConfigCompiler::HandleLibrary(const String& library)
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{
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Utility::LoadIcingaLibrary(library, false);
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}
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/**
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* Compiles a stream.
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*
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* @param path A name identifying the stream.
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* @param stream The input stream.
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* @returns Configuration items.
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*/
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void ConfigCompiler::CompileStream(const String& path,
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istream *stream, vector<ConfigItem::Ptr> *resultItems, vector<ConfigType::Ptr> *resultTypes)
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{
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stream->exceptions(istream::badbit);
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ConfigCompiler ctx(path, stream);
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ctx.Compile();
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if (resultItems) {
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vector<ConfigItem::Ptr> items = ctx.GetResultObjects();
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std::copy(items.begin(), items.end(), std::back_inserter(*resultItems));
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}
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if (resultTypes) {
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vector<ConfigType::Ptr> types = ctx.GetResultTypes();
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std::copy(types.begin(), types.end(), std::back_inserter(*resultTypes));
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}
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}
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/**
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* Compiles a file.
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*
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* @param path The path.
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* @returns Configuration items.
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*/
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void ConfigCompiler::CompileFile(const String& path,
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vector<ConfigItem::Ptr> *resultItems, vector<ConfigType::Ptr> *resultTypes)
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{
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ifstream stream;
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stream.open(path.CStr(), ifstream::in);
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if (!stream)
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throw_exception(invalid_argument("Could not open config file: " + path));
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Logger::Write(LogInformation, "config", "Compiling config file: " + path);
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return CompileStream(path, &stream, resultItems, resultTypes);
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}
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/**
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* Compiles a snippet of text.
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*
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* @param path A name identifying the text.
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* @param text The text.
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* @returns Configuration items.
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*/
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void ConfigCompiler::CompileText(const String& path, const String& text,
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vector<ConfigItem::Ptr> *resultItems, vector<ConfigType::Ptr> *resultTypes)
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{
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stringstream stream(text);
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return CompileStream(path, &stream, resultItems, resultTypes);
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}
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/**
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* Default include handler. Includes the file and returns a list of
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* configuration items.
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*
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* @param include The path from the include directive.
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*/
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void ConfigCompiler::HandleFileInclude(const String& include, bool search,
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vector<ConfigItem::Ptr> *resultItems, vector<ConfigType::Ptr> *resultTypes)
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{
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String includePath = include;
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if (search) {
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String path;
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BOOST_FOREACH(const String& dir, m_IncludeSearchDirs) {
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String path = dir + "/" + include;
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#ifndef _WIN32
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struct stat statbuf;
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if (lstat(path.CStr(), &statbuf) >= 0) {
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#else /* _WIN32 */
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struct _stat statbuf;
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if (_stat(path.CStr(), &statbuf) >= 0) {
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#endif /* _WIN32 */
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includePath = path;
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break;
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}
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}
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}
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vector<ConfigItem::Ptr> items;
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if (!Utility::Glob(includePath, boost::bind(&ConfigCompiler::CompileFile, _1, resultItems, resultTypes)))
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throw_exception(invalid_argument("Include file '" + include + "' does not exist (or no files found for pattern)."));
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}
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/**
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* Adds an object to the result.
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*
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* @param object The configuration item.
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*/
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void ConfigCompiler::AddObject(const ConfigItem::Ptr& object)
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{
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m_ResultObjects.push_back(object);
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}
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/**
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* Adds a directory to the list of include search dirs.
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*
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* @param dir The new dir.
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*/
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void ConfigCompiler::AddIncludeSearchDir(const String& dir)
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{
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Logger::Write(LogInformation, "config", "Adding include search dir: " + dir);
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m_IncludeSearchDirs.push_back(dir);
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}
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void ConfigCompiler::AddType(const ConfigType::Ptr& type)
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{
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m_ResultTypes[type->GetName()] = type;
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}
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ConfigType::Ptr ConfigCompiler::GetTypeByName(const String& name) const
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{
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map<String, ConfigType::Ptr>::const_iterator it;
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it = m_ResultTypes.find(name);
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if (it == m_ResultTypes.end())
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return ConfigType::Ptr();
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return it->second;
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}
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