mirror of https://github.com/Icinga/icinga2.git
332 lines
9.2 KiB
C++
332 lines
9.2 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2015 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 "config/configcompiler.hpp"
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#include "config/configitem.hpp"
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#include "base/logger.hpp"
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#include "base/utility.hpp"
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#include "base/loader.hpp"
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#include "base/context.hpp"
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#include "base/exception.hpp"
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#include <fstream>
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#include <boost/foreach.hpp>
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using namespace icinga;
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std::vector<String> ConfigCompiler::m_IncludeSearchDirs;
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std::map<String, std::vector<ZoneFragment> > ConfigCompiler::m_ZoneDirs;
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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 zone The zone.
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*/
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ConfigCompiler::ConfigCompiler(const String& path, std::istream *input, const String& zone)
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: m_Path(path), m_Input(input), m_Zone(zone), m_Eof(false), m_OpenBraces(0), m_IgnoreNewlines(0)
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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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delete m_Input;
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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 path for the input file.
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*
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* @returns The path.
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*/
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const char *ConfigCompiler::GetPath(void) const
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{
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return m_Path.CStr();
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}
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void ConfigCompiler::SetZone(const String& zone)
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{
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m_Zone = zone;
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}
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String ConfigCompiler::GetZone(void) const
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{
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return m_Zone;
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}
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void ConfigCompiler::CollectIncludes(std::vector<Expression *>& expressions, const String& file, const String& zone)
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{
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expressions.push_back(CompileFile(file, true, zone));
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}
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/**
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* Handles an include directive.
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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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* @param debuginfo Debug information.
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*/
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Expression *ConfigCompiler::HandleInclude(const String& include, bool search, const DebugInfo& debuginfo)
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{
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String path;
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if (search || (include.GetLength() > 0 && include[0] == '/'))
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path = include;
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else
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path = Utility::DirName(GetPath()) + "/" + include;
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String includePath = path;
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if (search) {
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BOOST_FOREACH(const String& dir, m_IncludeSearchDirs) {
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String spath = dir + "/" + include;
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if (Utility::PathExists(spath)) {
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includePath = spath;
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break;
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}
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}
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}
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std::vector<Expression *> expressions;
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if (!Utility::Glob(includePath, boost::bind(&ConfigCompiler::CollectIncludes, boost::ref(expressions), _1, m_Zone), GlobFile) && includePath.FindFirstOf("*?") == String::NPos) {
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std::ostringstream msgbuf;
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msgbuf << "Include file '" + include + "' does not exist";
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BOOST_THROW_EXCEPTION(ScriptError(msgbuf.str(), debuginfo));
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}
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DictExpression *expr = new DictExpression(expressions);
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expr->MakeInline();
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return expr;
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}
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/**
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* Handles recursive includes.
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*
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* @param path The directory path.
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* @param pattern The file pattern.
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* @param debuginfo Debug information.
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*/
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Expression *ConfigCompiler::HandleIncludeRecursive(const String& path, const String& pattern, const DebugInfo&)
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{
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String ppath;
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if (path.GetLength() > 0 && path[0] == '/')
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ppath = path;
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else
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ppath = Utility::DirName(GetPath()) + "/" + path;
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std::vector<Expression *> expressions;
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Utility::GlobRecursive(ppath, pattern, boost::bind(&ConfigCompiler::CollectIncludes, boost::ref(expressions), _1, m_Zone), GlobFile);
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return new DictExpression(expressions);
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}
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void ConfigCompiler::HandleIncludeZone(const String& tag, const String& path, const String& pattern, std::vector<Expression *>& expressions)
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{
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String zoneName = Utility::BaseName(path);
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String ppath;
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if (path.GetLength() > 0 && path[0] == '/')
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ppath = path;
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else
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ppath = Utility::DirName(GetPath()) + "/" + path;
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RegisterZoneDir(tag, ppath, zoneName);
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Utility::GlobRecursive(ppath, pattern, boost::bind(&ConfigCompiler::CollectIncludes, boost::ref(expressions), _1, zoneName), GlobFile);
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}
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/**
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* Handles zone includes.
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*
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* @param tag The tag name.
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* @param path The directory path.
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* @param pattern The file pattern.
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* @param debuginfo Debug information.
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*/
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Expression *ConfigCompiler::HandleIncludeZones(const String& tag, const String& path, const String& pattern, const DebugInfo&)
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{
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String ppath;
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if (path.GetLength() > 0 && path[0] == '/')
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ppath = path;
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else
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ppath = Utility::DirName(GetPath()) + "/" + path;
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std::vector<Expression *> expressions;
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Utility::Glob(ppath + "/*", boost::bind(&ConfigCompiler::HandleIncludeZone, this, tag, _1, pattern, boost::ref(expressions)), GlobDirectory);
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return new DictExpression(expressions);
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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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Loader::LoadExtensionLibrary(library);
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}
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void ConfigCompiler::CompileHelper(void)
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{
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try {
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m_Promise.set_value(boost::shared_ptr<Expression>(Compile()));
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} catch (...) {
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m_Promise.set_exception(boost::current_exception());
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}
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delete this;
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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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Expression *ConfigCompiler::CompileStream(const String& path, std::istream *stream, bool async, const String& zone)
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{
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CONTEXT("Compiling configuration stream with name '" + path + "'");
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stream->exceptions(std::istream::badbit);
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ConfigCompiler* ctx = new ConfigCompiler(path, stream, zone);
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if (async) {
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boost::shared_future<boost::shared_ptr<Expression> > ftr = boost::shared_future<boost::shared_ptr<Expression> >(ctx->m_Promise.get_future());
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Utility::QueueAsyncCallback(boost::bind(&ConfigCompiler::CompileHelper, ctx));
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return new FutureExpression(ftr);
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} else {
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Expression *expr;
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try {
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expr = ctx->Compile();
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} catch (...) {
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delete ctx;
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throw;
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}
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delete ctx;
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return expr;
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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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Expression *ConfigCompiler::CompileFile(const String& path, bool async, const String& zone)
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{
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CONTEXT("Compiling configuration file '" + path + "'");
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std::ifstream *stream = new std::ifstream();
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stream->open(path.CStr(), std::ifstream::in);
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if (!*stream)
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BOOST_THROW_EXCEPTION(posix_error()
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<< boost::errinfo_api_function("std::ifstream::open")
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<< boost::errinfo_errno(errno)
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<< boost::errinfo_file_name(path));
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Log(LogInformation, "ConfigCompiler")
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<< "Compiling config file: " << path;
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return CompileStream(path, stream, async, zone);
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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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Expression *ConfigCompiler::CompileText(const String& path, const String& text, bool async, const String& zone)
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{
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std::stringstream *stream = new std::stringstream(text);
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return CompileStream(path, stream, async, zone);
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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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Log(LogInformation, "ConfigCompiler")
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<< "Adding include search dir: " << dir;
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m_IncludeSearchDirs.push_back(dir);
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}
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std::vector<ZoneFragment> ConfigCompiler::GetZoneDirs(const String& zone)
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{
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std::map<String, std::vector<ZoneFragment> >::const_iterator it;
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it = m_ZoneDirs.find(zone);
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if (it == m_ZoneDirs.end())
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return std::vector<ZoneFragment>();
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else
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return it->second;
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}
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void ConfigCompiler::RegisterZoneDir(const String& tag, const String& ppath, const String& zoneName)
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{
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ZoneFragment zf;
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zf.Tag = tag;
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zf.Path = ppath;
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m_ZoneDirs[zoneName].push_back(zf);
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}
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