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annotate gen/configfile.cpp @ 1340:206329112670

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Fix the ldcbinarypath config file rewriting.
author Christian Kamm <kamm incasoftware de>
date Sun, 10 May 2009 18:14:36 +0200
parents 2e98ddd72fa7
children 8309ebaa23d5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #include <iostream>
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2 #include <string>
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3 #include <cassert>
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4 #include <cstring>
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5
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6 #include "llvm/System/Path.h"
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7
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8 #include "libconfig.h++"
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9
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10 #include "gen/configfile.h"
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11
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12 #include "mars.h"
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13
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14 namespace sys = llvm::sys;
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15
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16 ConfigFile::ConfigFile()
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17 {
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18 cfg = new libconfig::Config;
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19 }
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20
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21 ConfigFile::~ConfigFile()
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22 {
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23 delete cfg;
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24 }
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25
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26 bool ConfigFile::read(const char* argv0, void* mainAddr, const char* filename)
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27 {
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28
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29 // try to find the config file
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30
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31 // 1) try the current working dir
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32 sys::Path p = sys::Path::GetCurrentDirectory();
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33 p.appendComponent(filename);
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34
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35 if (!p.exists())
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36 {
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37 // 2) try the user home dir
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38 p = sys::Path::GetUserHomeDirectory();
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39 p.appendComponent(filename);
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40
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41 if (!p.exists())
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42 {
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43 // 3) try the install-prefix/etc
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44 p = sys::Path(LDC_INSTALL_PREFIX);
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45 #if !_WIN32
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46 // Does Window need something similar?
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47 p.appendComponent("etc");
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48 #endif
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49 p.appendComponent(filename);
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50
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51 if (!p.exists())
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52 {
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53 // 4) try next to the executable
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54 p = sys::Path::GetMainExecutable(argv0, mainAddr);
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55 p.eraseComponent();
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56 p.appendComponent(filename);
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57 if (!p.exists())
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58 {
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59 // 5) fail load cfg, users still have the DFLAGS environment var
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60 std::cerr << "Error failed to locate the configuration file: " << filename << std::endl;
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61 return false;
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62 }
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63 }
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64 }
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65 }
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66
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67 try
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68 {
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69 // read the cfg
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70 cfg->readFile(p.c_str());
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71
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72 // make sure there's a default group
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73 if (!cfg->exists("default"))
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74 {
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75 std::cerr << "no default settings in configuration file" << std::endl;
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76 return false;
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77 }
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78 libconfig::Setting& root = cfg->lookup("default");
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79 if (!root.isGroup())
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80 {
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81 std::cerr << "default is not a group" << std::endl;
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82 return false;
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83 }
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84
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85 // handle switches
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86 if (root.exists("switches"))
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87 {
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88 std::string binpathkey = "%%ldcbinarypath%%";
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89 std::string binpath = sys::Path::GetMainExecutable(argv0, mainAddr).getDirname();
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90
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91 libconfig::Setting& arr = cfg->lookup("default.switches");
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92 int len = arr.getLength();
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93 for (int i=0; i<len; i++)
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94 {
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95 std::string v = arr[i];
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96
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97 // replace binpathkey with binpath
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98 size_t p;
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99 while (std::string::npos != (p = v.find(binpathkey)))
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100 v.replace(p, binpathkey.size(), binpath);
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101
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102 switches.push_back(strdup(v.c_str()));
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103 }
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104 }
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105
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106 }
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107 catch(libconfig::FileIOException& fioe)
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108 {
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109 std::cerr << "Error reading configuration file: " << filename << std::endl;
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110 return false;
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111 }
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112 catch(libconfig::ParseException& pe)
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113 {
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114 std::cerr << "Error parsing configuration file: " << filename
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115 << "(" << pe.getLine() << "): " << pe.getError() << std::endl;
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116 return false;
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117 }
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118 catch(...)
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119 {
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120 std::cerr << "Unknown exception caught!" << std::endl;
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121 return false;
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122 }
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123
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124 return true;
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125 }
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126