icinga2/lib/config/configcompiler.cpp

234 lines
6.4 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "config/configcompiler.hpp"
#include "config/configitem.hpp"
#include "base/logger.hpp"
#include "base/utility.hpp"
#include "base/context.hpp"
#include "base/exception.hpp"
#include <fstream>
#include <boost/foreach.hpp>
using std::ifstream;
using namespace icinga;
std::vector<String> ConfigCompiler::m_IncludeSearchDirs;
/**
* Constructor for the ConfigCompiler class.
*
* @param path The path of the configuration file (or another name that
* identifies the source of the configuration text).
* @param input Input stream for the configuration file.
* @param zone The zone.
*/
ConfigCompiler::ConfigCompiler(const String& path, std::istream *input, const String& zone)
: m_Path(path), m_Input(input), m_Zone(zone)
{
InitializeScanner();
}
/**
* Destructor for the ConfigCompiler class.
*/
ConfigCompiler::~ConfigCompiler(void)
{
DestroyScanner();
}
/**
* Reads data from the input stream. Used internally by the lexer.
*
* @param buffer Where to store data.
* @param max_size The maximum number of bytes to read from the stream.
* @returns The actual number of bytes read.
*/
size_t ConfigCompiler::ReadInput(char *buffer, size_t max_size)
{
m_Input->read(buffer, max_size);
return static_cast<size_t>(m_Input->gcount());
}
/**
* Retrieves the scanner object.
*
* @returns The scanner object.
*/
void *ConfigCompiler::GetScanner(void) const
{
return m_Scanner;
}
/**
* Retrieves the path for the input file.
*
* @returns The path.
*/
String ConfigCompiler::GetPath(void) const
{
return m_Path;
}
void ConfigCompiler::SetZone(const String& zone)
{
m_Zone = zone;
}
String ConfigCompiler::GetZone(void) const
{
return m_Zone;
}
/**
* Handles an include directive.
*
* @param include The path from the include directive.
* @param search Whether to search global include dirs.
* @param debuginfo Debug information.
*/
void ConfigCompiler::HandleInclude(const String& include, bool search, const DebugInfo& debuginfo)
{
String path;
if (search || (include.GetLength() > 0 && include[0] == '/'))
path = include;
else
path = Utility::DirName(GetPath()) + "/" + include;
String includePath = path;
if (search) {
BOOST_FOREACH(const String& dir, m_IncludeSearchDirs) {
String spath = dir + "/" + include;
if (Utility::PathExists(spath)) {
includePath = spath;
break;
}
}
}
std::vector<ConfigItem::Ptr> items;
if (!Utility::Glob(includePath, boost::bind(&ConfigCompiler::CompileFile, _1, m_Zone), GlobFile) && includePath.FindFirstOf("*?") == String::NPos) {
std::ostringstream msgbuf;
msgbuf << "Include file '" + include + "' does not exist: " << debuginfo;
BOOST_THROW_EXCEPTION(std::invalid_argument(msgbuf.str()));
}
}
/**
* Handles recursive includes.
*
* @param include The directory path.
* @param pattern The file pattern.
* @param debuginfo Debug information.
*/
void ConfigCompiler::HandleIncludeRecursive(const String& include, const String& pattern, const DebugInfo&)
{
String path;
if (include.GetLength() > 0 && include[0] == '/')
path = include;
else
path = Utility::DirName(GetPath()) + "/" + include;
Utility::GlobRecursive(path, pattern, boost::bind(&ConfigCompiler::CompileFile, _1, m_Zone), GlobFile);
}
/**
* Handles the library directive.
*
* @param library The name of the library.
*/
void ConfigCompiler::HandleLibrary(const String& library)
{
(void) Utility::LoadExtensionLibrary(library);
}
/**
* Compiles a stream.
*
* @param path A name identifying the stream.
* @param stream The input stream.
* @returns Configuration items.
*/
void ConfigCompiler::CompileStream(const String& path, std::istream *stream, const String& zone)
{
CONTEXT("Compiling configuration stream with name '" + path + "'");
stream->exceptions(std::istream::badbit);
ConfigCompiler ctx(path, stream, zone);
ctx.Compile();
}
/**
* Compiles a file.
*
* @param path The path.
* @returns Configuration items.
*/
void ConfigCompiler::CompileFile(const String& path, const String& zone)
{
CONTEXT("Compiling configuration file '" + path + "'");
std::ifstream stream;
stream.open(path.CStr(), std::ifstream::in);
if (!stream)
BOOST_THROW_EXCEPTION(posix_error()
<< boost::errinfo_api_function("std::ifstream::open")
<< boost::errinfo_errno(errno)
<< boost::errinfo_file_name(path));
Log(LogInformation, "ConfigCompiler")
<< "Compiling config file: " << path;
return CompileStream(path, &stream, zone);
}
/**
* Compiles a snippet of text.
*
* @param path A name identifying the text.
* @param text The text.
* @returns Configuration items.
*/
void ConfigCompiler::CompileText(const String& path, const String& text, const String& zone)
{
std::stringstream stream(text);
return CompileStream(path, &stream, zone);
}
/**
* Adds a directory to the list of include search dirs.
*
* @param dir The new dir.
*/
void ConfigCompiler::AddIncludeSearchDir(const String& dir)
{
Log(LogInformation, "ConfigCompiler")
<< "Adding include search dir: " << dir;
m_IncludeSearchDirs.push_back(dir);
}