| # Gaudi Framework, version v21r11 |

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# PathResolver.cpp

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    00001 #include "GaudiKernel/PathResolver.h"
    00002
    00003 #include <iostream>
    00004 #include <string>
    00005 #include <vector>
    00006 #include <stdlib.h>
    00007
    00008 #include <boost/algorithm/string/split.hpp>
    00009 #include <boost/algorithm/string/classification.hpp>
    00010 #include <boost/filesystem.hpp>
    00011
    00012 namespace bf = boost::filesystem;
    00013 using namespace std;
    00014
    00015 #ifdef _WIN32
    00016   static const char* path_separator = ",;";
    00017 #else
    00018   static const char* path_separator = ",:";
    00019 #endif
    00020
    00021 //
    00023 //
    00024
    00025 namespace System {
    00026
    00027 typedef enum {
    00028   PR_regular_file,
    00029   PR_directory
    00030 } PR_file_type;
    00031
    00032 typedef enum {
    00033   PR_local,
    00034   PR_recursive
    00035 } PR_search_type;
    00036
    00037 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00038
    00039 static bool
    00040 PR_find( const bf::path& file, const string& search_list,
    00041          PR_file_type file_type, PathResolver::SearchType search_type,
    00042          string& result ) {
    00043
    00044   bool found(false);
    00045
    00046   // assume that "." is always part of the search path, so check locally first
    00047
    00048   try {
    00049     bf::path local = bf::initial_path() / file;
    00050     if ( ( file_type == PR_regular_file && is_regular_file( local ) ) ||
    00051          ( file_type == PR_directory && is_directory( local ) ) ) {
    00052       result = bf::complete(file).string();
    00053       return true;
    00054     }
    00055   } catch (bf::filesystem_error /*err*/) {
    00056   }
    00057
    00058
    00059   // iterate through search list
    00060   vector<string> spv;
    00061   split(spv, search_list, boost::is_any_of( path_separator), boost::token_compress_on);
    00062   for (vector<string>::const_iterator itr = spv.begin();
    00063        itr != spv.end(); ++itr ) {
    00064
    00065     bf::path fp = *itr / file;
    00066
    00067     try {
    00068       if ( ( file_type == PR_regular_file && is_regular_file( fp ) ) ||
    00069            ( file_type == PR_directory && is_directory( fp ) ) ) {
    00070         result = bf::complete(fp).string();
    00071         return true;
    00072       }
    00073     } catch (bf::filesystem_error /*err*/) {
    00074     }
    00075
    00076
    00077     // if recursive searching requested, drill down
    00078     if (search_type == PathResolver::RecursiveSearch &&
    00079         is_directory( bf::path(*itr) ) ) {
    00080
    00081       bf::recursive_directory_iterator end_itr;
    00082       try {
    00083         for ( bf::recursive_directory_iterator ritr( *itr );
    00084               ritr != end_itr; ++ritr) {
    00085
    00086           // skip if not a directory
    00087           if (! is_directory( bf::path(*ritr) ) ) { continue; }
    00088
    00089           bf::path fp2 = bf::path(*ritr) / file;
    00090           if ( ( file_type == PR_regular_file && is_regular_file( fp2 ) ) ||
    00091                ( file_type == PR_directory && is_directory( fp2 ) ) ) {
    00092             result = bf::complete( fp2 ).string();
    00093             return true;
    00094           }
    00095         }
    00096       } catch (bf::filesystem_error /*err*/) {
    00097       }
    00098     }
    00099
    00100   }
    00101
    00102   return found;
    00103 }
    00104
    00105 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00106
    00107 string
    00108 PathResolver::find_file(const std::string& logical_file_name,
    00109               const std::string& search_path,
    00110               SearchType search_type) {
    00111
    00112   const char* path_env = ::getenv (search_path.c_str ());
    00113
    00114   std::string path_list;
    00115
    00116   if (path_env != 0)
    00117   {
    00118     path_list = path_env;
    00119   }
    00120
    00121   return (find_file_from_list (logical_file_name, path_list, search_type));
    00122 }
    00123
    00124 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00125
    00126 std::string
    00127 PathResolver::find_file_from_list (const std::string& logical_file_name,
    00128                                    const std::string& search_list,
    00129                                    SearchType search_type)
    00130 {
    00131   std::string result("");
    00132
    00133   bf::path lfn( logical_file_name );
    00134
    00135   /* bool found = */
    00136   PR_find (lfn, search_list, PR_regular_file, search_type, result);
    00137
    00138   // The following functionality was in the original PathResolver, but I believe
    00139   // that it's WRONG. It extracts the filename of the requested item, and searches
    00140   // for that if the preceding search fails. i.e., if you're looking for "B/a.txt",
    00141   // and that fails, it will look for just "a.txt" in the search list.
    00142
    00143   // if (! found && lfn.filename() != lfn ) {
    00144   //   result = "";
    00145   //   PR_find (lfn.filename(), search_list, PR_regular_file, search_type, result);
    00146   // }
    00147
    00148   return (result);
    00149 }
    00150
    00151 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00152
    00153 string PathResolver::find_directory (const std::string& logical_file_name,
    00154                                      const std::string& search_path,
    00155                                      SearchType search_type)
    00156 {
    00157   const char* path_env = ::getenv (search_path.c_str ());
    00158
    00159   std::string path_list;
    00160
    00161   if (path_env != 0)
    00162     {
    00163       path_list = path_env;
    00164     }
    00165
    00166   return (find_directory_from_list (logical_file_name, path_list, search_type));
    00167 }
    00168
    00169 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00170
    00171 string
    00172 PathResolver::find_directory_from_list (const std::string& logical_file_name,
    00173                                         const std::string& search_list,
    00174                                         SearchType search_type)
    00175 {
    00176   std::string result;
    00177
    00178   if (!PR_find (logical_file_name, search_list, PR_directory, search_type, result))
    00179   {
    00180     result = "";
    00181   }
    00182
    00183   return (result);
    00184 }
    00185
    00186
    00187 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00188
    00189 PathResolver::SearchPathStatus
    00190 PathResolver::check_search_path (const std::string& search_path)
    00191 {
    00192   const char* path_env = ::getenv (search_path.c_str ());
    00193
    00194   if (path_env == 0) return (EnvironmentVariableUndefined);
    00195
    00196   std::string path_list (path_env);
    00197
    00198   vector<string> spv;
    00199   boost::split( spv, path_list, boost::is_any_of( path_separator ), boost::token_compress_on);
    00200   vector<string>::iterator itr=spv.begin();
    00201
    00202   try {
    00203     for (; itr!= spv.end(); ++itr) {
    00204       bf::path pp(*itr);
    00205       if (!is_directory(pp)) {
    00206         return (UnknownDirectory);
    00207       }
    00208     }
    00209   } catch(bf::filesystem_error /*err*/) {
    00210     return (UnknownDirectory);
    00211   }
    00212
    00213   return ( Ok );
    00214 }
    00215
    00216 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    00217
    00218 std::string PathResolverFindXMLFile (const std::string& logical_file_name)
    00219 {
    00220   return PathResolver::find_file (logical_file_name, "XMLPATH");
    00221 }
    00222
    00223 std::string PathResolverFindDataFile (const std::string& logical_file_name)
    00224 {
    00225   return PathResolver::find_file (logical_file_name, "DATAPATH");
    00226 }
    00227
    00228 }  // System namespace