1 | #!/usr/bin/perl -w
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2 | #
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3 | # ProjectBuilder Conf module
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4 | # Conf files subroutines brought by the the Project-Builder project
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5 | # which can be easily used by wahtever perl project
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6 | #
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7 | # Copyright B. Cornec 2007-2016
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8 | # Eric Anderson's changes are (c) Copyright 2012 Hewlett Packard
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9 | # Provided under the GPL v2
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10 | #
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11 | # $Id$
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12 | #
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13 |
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14 | package ProjectBuilder::Conf;
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15 |
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16 | use strict;
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17 | use Carp 'confess';
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18 | use Data::Dumper;
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19 | use ProjectBuilder::Base;
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20 | use ProjectBuilder::Version;
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21 |
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22 | # Inherit from the "Exporter" module which handles exporting functions.
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23 |
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24 | use vars qw($VERSION $REVISION $PBCONFVER @ISA @EXPORT);
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25 | use Exporter;
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26 |
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27 | # Export, by default, all the functions into the namespace of
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28 | # any code which uses this module.
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29 |
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30 | our @ISA = qw(Exporter);
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31 | our @EXPORT = qw(pb_conf_init pb_conf_add pb_conf_read pb_conf_read_if pb_conf_write pb_conf_get pb_conf_get_if pb_conf_get_all pb_conf_get_hash pb_conf_cache pb_conf_update_v0);
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32 | ($VERSION,$REVISION,$PBCONFVER) = pb_version_init();
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33 |
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34 | # Global hash of conf files
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35 | # Key is the conf file name
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36 | # Value is its rank
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37 | my %pbconffiles;
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38 |
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39 | # Global hash of conf file content
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40 | # Key is the config keyword
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41 | # Value is a hash whose key depends on the nature of the config keyword as documented
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42 | # and value is the confguration value
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43 | # We consider that values can not change during the life of pb
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44 | my $h = ();
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45 |
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46 | =pod
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47 |
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48 | =head1 NAME
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49 |
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50 | ProjectBuilder::Conf, part of the project-builder.org - module dealing with configuration files
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51 |
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52 | =head1 DESCRIPTION
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53 |
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54 | This modules provides functions dealing with configuration files.
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55 |
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56 | =head1 SYNOPSIS
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57 |
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58 | use ProjectBuilder::Conf;
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59 |
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60 | #
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61 | # Read hash codes of values from a configuration file and return table of pointers
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62 | #
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63 | my ($k1, $k2) = pb_conf_read_if("$ENV{'HOME'}/.pbrc.yml","key1","key2");
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64 | my ($k) = pb_conf_read("$ENV{'HOME'}/.pbrc.yml","key");
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65 |
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66 | =head1 USAGE
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67 |
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68 | The configuration files are loaded in a specific order from most generic to the most specific
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69 | to allow for overwrite to work:
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70 |
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71 | For recent versions of pb (>= 0.15):
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72 | 1. /usr/share/pb/pb.yml - the read-only system conf file provided by install
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73 | 2. /etc/pb/pb.yml - the same global conf file given to the sysadmin in order to make system wide modifications
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74 | 3. /path/to/project.yml - Configuration file for the project we're building for
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75 | 4. /vm|vepath/to/.pbrc.yml - configuration file for VM, VE or RM specific parameters. Cumulative should be orthogonal
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76 | 5. $HOME/.pbrc.yml - user's configuration file
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77 |
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78 | For versions of pb up to 0.14:
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79 | 1. /usr/share/pb/pb.conf - the read-only system conf file provided by install
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80 | 2. /etc/pb/pb.conf - the same global conf file given to the sysadmin in order to make system wide modifications
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81 | 3. /path/to/project.pb - Configuration file for the project we're building for
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82 | 4. /(vm|ve|rm)path/to/.pbrc - configuration file for VM, VE or RM specific parameters. Cumulative should be orthogonal
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83 | 5. $HOME/.pbrc - user's configuration file
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84 |
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85 | The format of the configuration file is as follows:
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86 |
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87 | For recent versions of pb (>= 0.15):
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88 | YAML format is now used - The version of the configuration files is
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89 |
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90 | Supposing the file is called "$ENV{'HOME'}/.pbrc.yml", containing the following:
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91 |
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92 | $ cat $HOME/.pbrc.yml
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93 | ---
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94 | pbver:
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95 | - pb: 3
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96 | - default: 1
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97 | pblist:
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98 | - pb: 12,25
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99 |
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100 | calling it like this:
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101 |
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102 | my ($k1, $k2) = pb_conf_read_if("$ENV{'HOME'}/.pbrc.yml","pbver","pblist");
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103 |
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104 | will allow to get the mapping:
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105 |
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106 | $k1->{'pb'} contains 3
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107 | $k1->{'default'} contains 1
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108 | $k2->{'pb'} contains 12,25
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109 |
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110 | For versions of pb up to 0.14:
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111 | An own format was used - The version of the configuration files is 0
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112 |
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113 | key tag = value1,value2,...
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114 |
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115 | Supposing the file is called "$ENV{'HOME'}/.pbrc", containing the following:
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116 |
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117 | $ cat $HOME/.pbrc
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118 | pbver pb = 3
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119 | pbver default = 1
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120 | pblist pb = 12,25
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121 |
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122 | calling it like this:
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123 |
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124 | my ($k1, $k2) = pb_conf_read_if("$ENV{'HOME'}/.pbrc","pbver","pblist");
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125 |
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126 | will allow to get the mapping:
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127 |
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128 | $k1->{'pb'} contains 3
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129 | $k1->{'default'} contains 1
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130 | $k2->{'pb'} contains 12,25
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131 |
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132 | Valid chars for keys and tags are letters, numbers, '-' and '_'.
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133 |
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134 | =over 4
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135 |
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136 | =item B<pb_conf_init>
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137 |
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138 | This function setup the environment PBPROJ for project-builder function usage from other projects.
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139 | The first parameter is the project name.
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140 | It sets up environment variables (PBPROJ)
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141 |
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142 | =cut
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143 |
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144 | sub pb_conf_init {
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145 |
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146 | my $proj=shift;
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147 |
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148 | pb_log(1,"Entering pb_conf_init\n");
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149 | #
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150 | # Check project name
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151 | # Could be with env var PBPROJ
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152 | # or option -p
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153 | # if not defined take the first in conf file
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154 | #
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155 | if ((defined $ENV{'PBPROJ'}) &&
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156 | (not defined $proj)) {
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157 | pb_log(2,"PBPROJ env var setup ($ENV{'PBPROJ'}) so using it\n");
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158 | $proj = $ENV{'PBPROJ'};
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159 | }
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160 |
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161 | if (defined $proj) {
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162 | $ENV{'PBPROJ'} = $proj;
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163 | } else {
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164 | $ENV{'PBPROJ'} = "default";
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165 | }
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166 | pb_log(1,"PBPROJ = $ENV{'PBPROJ'}\n");
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167 | }
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168 |
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169 |
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170 | =item B<pb_conf_cache>
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171 |
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172 | This function caches the configuration file content passed as first parameter into the hash passed in second parameter
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173 | It returns the modified hash
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174 | Can be used in correlation with the %h hash to store permanently values or not if temporarily.
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175 |
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176 | =cut
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177 |
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178 | sub pb_conf_cache {
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179 |
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180 | my $cf = shift;
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181 | my $lh = shift;
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182 |
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183 | my $ldfunc;
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184 |
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185 | # Read the content of the config file and cache it in the %h hash then available for queries
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186 | if ($PBCONFVER < 1) {
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187 | open(CONF,$cf) || confess "Unable to open $cf";
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188 | # This is the original conf file format for versions up to 0.14
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189 | while(<CONF>) {
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190 | next if (/^#/);
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191 | if (/^\s*([A-z0-9-_.]+)\s+([[A-z0-9-_.\?\[\]\*\+\\]+)\s*=\s*(.*)$/) {
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192 | pb_log(3,"DEBUG: 1:$1 2:$2 3:$3\n");
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193 | my ($what, $var, $value) = ($1, $2, $3);
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194 | # Add support for multi-lines
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195 | while ($value =~ s/\\\s*$//o) {
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196 | $_ = <CONF>;
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197 | die "Still processing continuations for $what $var at EOF" if (not defined $_);
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198 | s/[\r\n]//go;
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199 | $value .= "\n$_";
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200 | }
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201 | $lh->{$what}->{$var}=$value;
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202 | } elsif ((/^\s*#/o) || (/^\s*$/o)) {
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203 | # ignore
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204 | } else {
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205 | chomp();
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206 | warn "unexpected line '$_' in $cf";
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207 | }
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208 | }
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209 | close(CONF);
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210 | } else {
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211 | eval {
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212 | require YAML;
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213 | YAML->import();
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214 | };
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215 | if ($@) {
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216 | eval {
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217 | # No YAML found using a more std but less complete one. Old perl only
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218 | require Module::Build::YAML;
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219 | Module::Build::YAML->import();
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220 | };
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221 | if ($@) {
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222 | die "Unable to handle YAML configuration files without a YAML.pm module\n";
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223 | } else {
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224 | $ldfunc = \&Module::Build::YAML::LoadFile;
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225 | }
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226 | } else {
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227 | $ldfunc = \&YAML::LoadFile;
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228 | }
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229 |
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230 | pb_log(1,"Loading YAML conf file $cf\n");
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231 | my $lh0 = $ldfunc->($cf);
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232 | foreach my $k (keys %$lh0) {
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233 | if (defined $lh->{$k}) {
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234 | foreach my $k2 (keys %{$lh0->{$k}}) {
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235 | $lh->{$k}->{$k2} = $lh0->{$k}->{$k2};
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236 | }
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237 | } else {
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238 | $lh->{$k} = $lh0->{$k};
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239 | }
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240 | }
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241 | }
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242 | return($lh);
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243 | }
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244 |
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245 | =item B<pb_conf_add>
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246 |
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247 | This function adds the configuration file to the list last, and cache their content in the %h hash
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248 |
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249 | =cut
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250 |
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251 | sub pb_conf_add {
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252 |
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253 | pb_log(2,"DEBUG: pb_conf_add with ".Dumper(@_)."\n");
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254 | my $lh;
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255 |
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256 | foreach my $cf (@_) {
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257 | if (! -r $cf) {
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258 | pb_log(0,"WARNING: pb_conf_add can not read $cf\n");
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259 | next;
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260 | }
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261 | # Skip already used conf files
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262 | return($lh) if (defined $pbconffiles{$cf});
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263 |
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264 | # The new conf file overload values already managed
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265 | my $num = keys %pbconffiles;
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266 | pb_log(2,"DEBUG: pb_conf_cache of $cf at position $num\n");
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267 | $pbconffiles{$cf} = $num;
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268 |
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269 | # Read the content of the config file
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270 | $lh = pb_conf_cache($cf,$lh);
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271 | # and cache it in the %h hash for further queries but after the previous
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272 | # as we load conf files in reverse order (most precise first)
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273 | pb_conf_add_last_in_hash($lh)
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274 | }
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275 | }
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276 |
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277 |
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278 | =item B<pb_conf_read_if>
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279 |
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280 | This function returns a table of pointers on hashes
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281 | corresponding to the keys in a configuration file passed in parameter.
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282 | If that file doesn't exist, it returns undef.
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283 |
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284 | The file read is forgotten after its usage. If you want permanent caching of the data, use pb_conf_add then pb_conf_get
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285 |
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286 | =cut
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287 |
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288 | sub pb_conf_read_if {
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289 |
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290 | my $conffile = shift;
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291 | my @param = @_;
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292 |
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293 | open(CONF,$conffile) || return((undef));
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294 | close(CONF);
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295 | return(pb_conf_read($conffile,@param));
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296 | }
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297 |
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298 | =item B<pb_conf_read>
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299 |
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300 | This function is similar to B<pb_conf_read_if> except that it dies when the file in parameter doesn't exist.
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301 |
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302 | =cut
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303 |
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304 | sub pb_conf_read {
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305 |
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306 | my $conffile = shift;
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307 | my @param = @_;
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308 | my @ptr;
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309 | my $lh;
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310 |
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311 | $lh = pb_conf_cache($conffile,$lh);
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312 |
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313 | foreach my $param (@param) {
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314 | push @ptr,$lh->{$param};
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315 | }
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316 | return(@ptr);
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317 | }
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318 |
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319 | =item B<pb_conf_write>
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320 |
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321 | This function writes in the file passed as first parameter the hash of values passed as second parameter
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322 |
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323 | =cut
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324 |
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325 | sub pb_conf_write {
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326 |
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327 | my $conffile = shift;
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328 | my $h = shift;
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329 | my $dpfunc;
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330 |
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331 | confess "No configuration file defined to write into !" if (not defined $conffile);
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332 | confess "No hash defined to read from !" if (not defined $h);
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333 | open(CONF,"> $conffile") || confess "Unable to write into $conffile";
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334 |
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335 | if ($PBCONFVER < 1) {
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336 | # This is the original conf file format for versions up to 0.14
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337 | foreach my $p (sort keys %$h) {
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338 | my $j = $h->{$p};
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339 | foreach my $k (sort keys %$j) {
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340 | print CONF "$p $k = $j->{$k}\n";
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341 | }
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342 | }
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343 | } else {
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344 | # This is the new YAML format
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345 | eval {
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346 | require YAML;
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347 | YAML->import();
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348 | };
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349 | if ($@) {
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350 | eval {
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351 | # No YAML found using a more std but less complete one. Old perl only
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352 | require Module::Build::YAML;
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353 | Module::Build::YAML->import();
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354 | };
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355 | if ($@) {
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356 | die "Unable to handle YAML configuration files without a YAML.pm module\n";
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357 | } else {
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358 | $dpfunc = \&Module::Build::YAML::Dump;
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359 | }
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360 | } else {
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361 | $dpfunc = \&YAML::Dump;
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362 | }
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363 |
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364 | pb_log(1,"Writing YAML conf file $conffile\n");
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365 | print CONF $dpfunc->($h);
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366 | }
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367 | close(CONF);
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368 | }
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369 |
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370 |
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371 |
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372 | =item B<pb_conf_get_in_hash_if>
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373 |
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374 | This function returns a table, corresponding to a set of values queried in the hash passed in parameter or undef if it doesn't exist.
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375 | It takes a table of keys as an input parameter.
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376 |
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377 | =cut
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378 |
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379 | sub pb_conf_get_in_hash_if {
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380 |
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381 | my $lh = shift || return(());
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382 | my @params = @_;
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383 | my @ptr = ();
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384 |
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385 | pb_log(2,"DEBUG: pb_conf_get_in_hash_if on params ".join(' ',@params)."\n");
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386 | foreach my $k (@params) {
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387 | push @ptr,$lh->{$k};
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388 | }
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389 |
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390 | pb_log(2,"DEBUG: pb_conf_get_in_hash_if returns\n".Dumper(@ptr));
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391 | return(@ptr);
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392 | }
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393 |
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394 |
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395 |
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396 | =item B<pb_conf_get_if>
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397 |
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398 | This function returns a table, corresponding to a set of values queried in the %h hash or undef if it doen't exist. It takes a table of keys as an input parameter.
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399 |
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400 | =cut
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401 |
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402 | sub pb_conf_get_if {
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403 |
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404 | my @param = @_;
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405 | my @return = pb_conf_get_in_hash_if($h,@_);
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406 | my $proj = undef;
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407 |
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408 | if (not defined $ENV{'PBPROJ'}) {
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409 | $proj = "unknown";
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410 | } else {
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411 | $proj = $ENV{'PBPROJ'};
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412 | }
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413 |
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414 | foreach my $i (0..$#param) {
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415 | if (not defined $return[$i]->{$proj}) {
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416 | $return[$i]->{$proj} = $return[$i]->{'default'} if (defined $return[$i]->{'default'});
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417 | }
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418 | }
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419 | return(@return);
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420 | }
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421 |
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422 | =item B<pb_conf_add_last_in_hash>
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423 |
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424 | This function merges the values passed in the hash parameter into the %h hash, but only if itdoesn't already contain a value, or if the value is more precise (real value instead of default)
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425 |
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426 | It is used internally by pb_conf_add and is not exported.
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427 |
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428 | =cut
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429 |
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430 | sub pb_conf_add_last_in_hash {
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431 |
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432 | my $ptr = shift;
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433 |
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434 | return if (not defined $ptr);
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435 | # TODO: test $ptr is a hash pointer
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436 |
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437 | # When called without correct initialization, try to work anyway with default as project
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438 | pb_conf_init("default") if (not defined $ENV{'PBPROJ'});
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439 |
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440 | my @params = (sort keys %$ptr);
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441 |
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442 | # Everything is returned via @h
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443 | # @h contains the values overloading what @ptr may contain.
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444 | my @h = pb_conf_get_in_hash_if($h,@params);
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445 | my @ptr = pb_conf_get_in_hash_if($ptr,@params);
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446 |
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447 | my $p1;
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448 | my $p2;
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449 |
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450 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash params: ".Dumper(@params)."\n");
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451 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash current hash: ".Dumper(@h)."\n");
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452 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash new inputs: ".Dumper(@ptr)."\n");
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453 |
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454 | foreach my $i (0..$#params) {
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455 | $p1 = $h[$i];
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456 | $p2 = $ptr[$i];
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457 | # Always try to take the param from h in priority
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458 | # in order to mask what could be defined already in ptr
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459 | if (not defined $p2) {
|
---|
460 | # exit if no p1 either
|
---|
461 | next if (not defined $p1);
|
---|
462 | } else {
|
---|
463 | # Ref found in p2
|
---|
464 | if (not defined $p1) {
|
---|
465 | # No ref in p1 so use p2's value
|
---|
466 | $p1 = $p2;
|
---|
467 | } else {
|
---|
468 | # Both are defined - handling the overloading
|
---|
469 | # Now copy back into p1 all p2 content
|
---|
470 | # as p1 content always has priority over p2
|
---|
471 | if (not defined $p1->{$ENV{'PBPROJ'}}) {
|
---|
472 | if (defined $p2->{$ENV{'PBPROJ'}}) {
|
---|
473 | $p1->{$ENV{'PBPROJ'}} = $p2->{$ENV{'PBPROJ'}};
|
---|
474 | }
|
---|
475 | }
|
---|
476 | # Now copy back into p1 all p2 content which doesn't exist in p1
|
---|
477 | # # p1 content always has priority over p2
|
---|
478 | foreach my $k (keys %$p2) {
|
---|
479 | $p1->{$k} = $p2->{$k} if (not defined $p1->{$k});
|
---|
480 | }
|
---|
481 | }
|
---|
482 | }
|
---|
483 | $h->{$params[$i]} = $p1;
|
---|
484 | }
|
---|
485 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash output: ".Dumper($h)."\n");
|
---|
486 | }
|
---|
487 |
|
---|
488 | =item B<pb_conf_get>
|
---|
489 |
|
---|
490 | This function is the same B<pb_conf_get_if>, except that it tests each returned value as they need to exist in that case.
|
---|
491 |
|
---|
492 | =cut
|
---|
493 |
|
---|
494 | sub pb_conf_get {
|
---|
495 |
|
---|
496 | my @param = @_;
|
---|
497 | my @return = pb_conf_get_if(@param);
|
---|
498 | my $proj = undef;
|
---|
499 |
|
---|
500 | if (not defined $ENV{'PBPROJ'}) {
|
---|
501 | $proj = "unknown";
|
---|
502 | } else {
|
---|
503 | $proj = $ENV{'PBPROJ'};
|
---|
504 | }
|
---|
505 |
|
---|
506 | confess "No params found for $proj" if (not @return);
|
---|
507 |
|
---|
508 | foreach my $i (0..$#param) {
|
---|
509 | confess "No $param[$i] defined for $proj" if (not defined $return[$i]);
|
---|
510 | }
|
---|
511 | return(@return);
|
---|
512 | }
|
---|
513 |
|
---|
514 |
|
---|
515 | =item B<pb_conf_get_all>
|
---|
516 |
|
---|
517 | This function returns an array with all configuration parameters
|
---|
518 |
|
---|
519 | =cut
|
---|
520 |
|
---|
521 | sub pb_conf_get_all {
|
---|
522 |
|
---|
523 | return(sort keys %$h);
|
---|
524 | }
|
---|
525 |
|
---|
526 |
|
---|
527 | =item B<pb_conf_get_hash>
|
---|
528 |
|
---|
529 | This function returns a pointer to the hash with all configuration parameters
|
---|
530 |
|
---|
531 | =cut
|
---|
532 |
|
---|
533 | sub pb_conf_get_hash {
|
---|
534 |
|
---|
535 | return($h);
|
---|
536 | }
|
---|
537 |
|
---|
538 | =item B<pb_conf_update_v0>
|
---|
539 |
|
---|
540 | This function transform the old configuration v0 file as first param into a new v1 one as second param
|
---|
541 |
|
---|
542 | =cut
|
---|
543 |
|
---|
544 | sub pb_conf_update_v0 {
|
---|
545 |
|
---|
546 | my $orig = shift;
|
---|
547 | my $dest = shift;
|
---|
548 |
|
---|
549 | open(ORIG,$orig) || confess "Unable to open $orig";
|
---|
550 | confess "Will not erase existing $dest while transforming $orig" if (-f $dest);
|
---|
551 | open(DEST,"> $dest") || confess "Unable to write into $dest";
|
---|
552 | print DEST "---\n";
|
---|
553 | my $pbconfverbkp = $PBCONFVER;
|
---|
554 | # We force migration from v0 to v1
|
---|
555 | $PBCONFVER = 0;
|
---|
556 | my $lh0;
|
---|
557 | my $lh1;
|
---|
558 | $lh0 = pb_conf_cache($orig,$lh0);
|
---|
559 | pb_log(2,"lh0:\n".Dumper($lh0)."\n");
|
---|
560 | $PBCONFVER = $pbconfverbkp;
|
---|
561 |
|
---|
562 | pb_log(0,"Converting v0 conf file $orig to v1 conf file $dest\n");
|
---|
563 | # We can't just write the YAML if we want to ckeep comments !
|
---|
564 | while (<ORIG>) {
|
---|
565 | if ($_ =~ /^#/) {
|
---|
566 | # Keep comments
|
---|
567 | print DEST $_;
|
---|
568 | } elsif ($_ =~ /^\s*$/) {
|
---|
569 | # Replace empty lines by comments
|
---|
570 | print DEST "#\n";;
|
---|
571 | } else {
|
---|
572 | if (/^\s*([A-z0-9-_]+)\s+(.+)$/) {
|
---|
573 | # Handle parameters
|
---|
574 | my ($param,$void) = ($1, $2);
|
---|
575 | if (not defined $lh1->{$param}) {
|
---|
576 | pb_log(2,"Converting parameter $param\n");
|
---|
577 | my $param2 = $param;
|
---|
578 | # param pburl in v0 is now pbprojurl in v1
|
---|
579 | $param2 =~ s/pburl/pbprojurl/;
|
---|
580 | print DEST "$param2:\n";
|
---|
581 | foreach my $k (keys %{$lh0->{$param}}) {
|
---|
582 | pb_log(2,"Handling key $k\n");
|
---|
583 | if ($lh0->{$param}->{$k} =~ /^\s*$/) {
|
---|
584 | print DEST " $k: !!str \"\"\n";
|
---|
585 | } else {
|
---|
586 | print DEST " $k: $lh0->{$param}->{$k}\n";
|
---|
587 | }
|
---|
588 | }
|
---|
589 | $lh1->{$param} = 1;
|
---|
590 | }
|
---|
591 | } else {
|
---|
592 | pb_log(0,"Unable to convert line $_\n");
|
---|
593 | }
|
---|
594 | }
|
---|
595 | }
|
---|
596 | close(ORIG);
|
---|
597 | close(DEST);
|
---|
598 | return();
|
---|
599 | }
|
---|
600 |
|
---|
601 | =back
|
---|
602 |
|
---|
603 | =head1 WEB SITES
|
---|
604 |
|
---|
605 | The main Web site of the project is available at L<http://www.project-builder.org/>. Bug reports should be filled using the trac instance of the project at L<http://trac.project-builder.org/>.
|
---|
606 |
|
---|
607 | =head1 USER MAILING LIST
|
---|
608 |
|
---|
609 | None exists for the moment.
|
---|
610 |
|
---|
611 | =head1 AUTHORS
|
---|
612 |
|
---|
613 | The Project-Builder.org team L<http://trac.project-builder.org/> lead by Bruno Cornec L<mailto:bruno@project-builder.org>.
|
---|
614 |
|
---|
615 | =head1 COPYRIGHT
|
---|
616 |
|
---|
617 | Project-Builder.org is distributed under the GPL v2.0 license
|
---|
618 | described in the file C<COPYING> included with the distribution.
|
---|
619 |
|
---|
620 | =cut
|
---|
621 |
|
---|
622 |
|
---|
623 | 1;
|
---|