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