[405] | 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 | # $Id$
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| 8 | #
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| 9 |
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| 10 | package ProjectBuilder::Conf;
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| 11 |
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| 12 | use strict;
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| 13 | use Data::Dumper;
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| 14 | use ProjectBuilder::Base;
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| 15 |
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| 16 | # Inherit from the "Exporter" module which handles exporting functions.
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| 17 |
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| 18 | use Exporter;
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| 19 |
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| 20 | # Export, by default, all the functions into the namespace of
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| 21 | # any code which uses this module.
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| 22 |
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| 23 | our @ISA = qw(Exporter);
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[409] | 24 | our @EXPORT = qw(pb_conf_init pb_conf_add pb_conf_read pb_conf_read_if pb_conf_get pb_conf_get_if);
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[405] | 25 |
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[409] | 26 | # Global list of conf files
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| 27 | our @pbconffiles = ();
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| 28 |
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[405] | 29 | =pod
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| 30 |
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| 31 | =head1 NAME
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| 32 |
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| 33 | ProjectBuilder::Conf, part of the project-builder.org - module dealing with configuration files
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| 34 |
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| 35 | =head1 DESCRIPTION
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| 36 |
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| 37 | This modules provides functions dealing with configuration files.
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| 38 |
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| 39 | =head1 SYNOPSIS
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| 40 |
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| 41 | use ProjectBuilder::Conf;
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| 42 |
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| 43 | #
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| 44 | # Read hash codes of values from a configuration file and return table of pointers
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| 45 | #
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| 46 | my ($k1, $k2) = pb_conf_read_if("$ENV{'HOME'}/.pbrc","key1","key2");
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| 47 | my ($k) = pb_conf_read("$ENV{'HOME'}/.pbrc","key");
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| 48 |
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| 49 | =head1 USAGE
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| 50 |
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| 51 | =over 4
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| 52 |
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[505] | 53 | =item B<pb_conf_init>
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| 54 |
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| 55 | This function setup the environment PBPROJ for project-builder function usage rfom other projects.
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| 56 | The first parameter is the project name.
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| 57 | It sets up environement variables (PBPROJ)
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| 58 |
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| 59 | =cut
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| 60 |
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| 61 | sub pb_conf_init {
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| 62 |
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| 63 | my $proj=shift || undef;
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| 64 |
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| 65 | if (defined $proj) {
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| 66 | $ENV{'PBPROJ'} = $proj;
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| 67 | } else {
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| 68 | $ENV{'PBPROJ'} = "default";
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| 69 | }
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| 70 | }
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| 71 |
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| 72 |
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| 73 |
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[409] | 74 | =item B<pb_conf_add>
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| 75 |
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| 76 | This function adds the configuration file to the list last.
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| 77 |
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| 78 | =cut
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| 79 |
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| 80 | sub pb_conf_add {
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| 81 |
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[415] | 82 | pb_log(2,"DEBUG: pb_conf_add with ".Dumper(@_)."\n");
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| 83 | push(@pbconffiles,@_);
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[409] | 84 | }
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| 85 |
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[405] | 86 | =item B<pb_conf_read_if>
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| 87 |
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| 88 | This function returns a table of pointers on hashes
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| 89 | corresponding to the keys in a configuration file passed in parameter.
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| 90 | If that file doesn't exist, it returns undef.
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| 91 |
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| 92 | The format of the configuration file is as follows:
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| 93 |
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| 94 | key tag = value1,value2,...
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| 95 |
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| 96 | Supposing the file is called "$ENV{'HOME'}/.pbrc", containing the following:
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| 97 |
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| 98 | $ cat $HOME/.pbrc
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| 99 | pbver pb = 3
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| 100 | pbver default = 1
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| 101 | pblist pb = 12,25
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| 102 |
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| 103 | calling it like this:
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| 104 |
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| 105 | my ($k1, $k2) = pb_conf_read_if("$ENV{'HOME'}/.pbrc","pbver","pblist");
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| 106 |
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| 107 | will allow to get the mapping:
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| 108 |
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| 109 | $k1->{'pb'} contains 3
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[409] | 110 | $k1->{'default'} contains 1
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[405] | 111 | $k2->{'pb'} contains 12,25
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| 112 |
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| 113 | Valid chars for keys and tags are letters, numbers, '-' and '_'.
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| 114 |
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| 115 | =cut
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| 116 |
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| 117 | sub pb_conf_read_if {
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| 118 |
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| 119 | my $conffile = shift;
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| 120 | my @param = @_;
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| 121 |
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| 122 | open(CONF,$conffile) || return((undef));
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| 123 | close(CONF);
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| 124 | return(pb_conf_read($conffile,@param));
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| 125 | }
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| 126 |
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| 127 | =item B<pb_conf_read>
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| 128 |
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| 129 | 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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| 130 |
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| 131 | =cut
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| 132 |
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| 133 | sub pb_conf_read {
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| 134 |
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| 135 | my $conffile = shift;
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| 136 | my @param = @_;
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| 137 | my $trace;
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| 138 | my @ptr;
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| 139 | my %h;
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| 140 |
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| 141 | open(CONF,$conffile) || die "Unable to open $conffile";
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| 142 | while(<CONF>) {
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[638] | 143 | if (/^\s*([A-z0-9-_.]+)\s+([[A-z0-9-_.]+)\s*=\s*(.+)$/) {
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[405] | 144 | pb_log(3,"DEBUG: 1:$1 2:$2 3:$3\n");
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| 145 | $h{$1}{$2}=$3;
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| 146 | }
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| 147 | }
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| 148 | close(CONF);
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| 149 |
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| 150 | for my $param (@param) {
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| 151 | push @ptr,$h{$param};
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| 152 | }
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| 153 | return(@ptr);
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| 154 | }
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| 155 |
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[409] | 156 | =item B<pb_conf_get_if>
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[405] | 157 |
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[409] | 158 | This function returns a table, corresponding to a set of values querried in the conf files or undef if it doen't exist. It takes a table of keys as an input parameter.
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[405] | 159 |
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[409] | 160 | The format of the configurations file is as follows:
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| 161 |
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| 162 | key tag = value1,value2,...
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| 163 |
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[505] | 164 | It will gather the values from all the configurations files passed to pb_conf_add, and return the values for the keys, taking in account the order of conf files, to manage overloading.
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[409] | 165 |
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| 166 | $ cat $HOME/.pbrc
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| 167 | pbver pb = 1
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| 168 | pblist pb = 4
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| 169 | $ cat $HOME/.pbrc2
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| 170 | pbver pb = 3
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| 171 | pblist default = 5
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| 172 |
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| 173 | calling it like this:
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| 174 |
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[505] | 175 | pb_conf_add("$HOME/.pbrc","$HOME/.pbrc2");
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[409] | 176 | my ($k1, $k2) = pb_conf_get_if("pbver","pblist");
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| 177 |
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| 178 | will allow to get the mapping:
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| 179 |
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| 180 | $k1->{'pb'} contains 3
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| 181 | $k2->{'pb'} contains 4
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| 182 |
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| 183 | Valid chars for keys and tags are letters, numbers, '-' and '_'.
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| 184 |
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| 185 | =cut
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| 186 |
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| 187 | sub pb_conf_get_if {
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| 188 |
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[405] | 189 | my @param = @_;
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| 190 |
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[409] | 191 | my $ptr = undef;
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[405] | 192 |
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[409] | 193 | # the most important conf file is first, so read them in revers order
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| 194 | foreach my $f (reverse @pbconffiles) {
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| 195 | $ptr = pb_conf_get_fromfile_if("$f",$ptr,@param);
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[405] | 196 | }
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[409] | 197 |
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| 198 | return(@$ptr);
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[405] | 199 | }
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| 200 |
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[409] | 201 | =item B<pb_conf_fromfile_if>
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[405] | 202 |
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[409] | 203 | This function returns a pointer on a table, corresponding to a merge of values querried in the conf file and the pointer on another table passed as parameter. It takes a table of keys as last input parameter.
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| 204 |
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| 205 | my ($k1) = pb_conf_fromfile_if("$HOME/.pbrc",undef,"pbver","pblist");
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| 206 | my ($k2) = pb_conf_fromfile_if("$HOME/.pbrc3",$k1,"pbver","pblist");
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| 207 |
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| 208 | It is used internally by pb_conf_get_if and is not exported yet.
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| 209 |
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| 210 | =cut
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| 211 |
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| 212 |
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| 213 | sub pb_conf_get_fromfile_if {
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| 214 |
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| 215 | my $conffile = shift;
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| 216 | my $ptr2 = shift || undef;
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[405] | 217 | my @param = @_;
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| 218 |
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| 219 | # Everything is returned via ptr1
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| 220 | my @ptr1 = ();
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| 221 | my @ptr2 = ();
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| 222 |
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[409] | 223 | # @ptr1 contains the values overloading what @ptr2 may contain.
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| 224 | @ptr1 = pb_conf_read_if("$conffile", @param) if (defined $conffile);
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| 225 | @ptr2 = @$ptr2 if (defined $ptr2);
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| 226 |
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[405] | 227 | my $p1;
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| 228 | my $p2;
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| 229 |
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[415] | 230 | pb_log(2,"DEBUG: pb_conf_get $conffile: ".Dumper(@ptr1)."\n");
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| 231 | pb_log(2,"DEBUG: pb_conf_get input: ".Dumper(@ptr2)."\n");
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[424] | 232 | pb_log(2,"DEBUG: pb_conf_get param: ".Dumper(@param)."\n");
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[405] | 233 |
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| 234 | foreach my $i (0..$#param) {
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| 235 | $p1 = $ptr1[$i];
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| 236 | $p2 = $ptr2[$i];
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[409] | 237 | # Always try to take the param from ptr1
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| 238 | # in order to mask what could be defined already in ptr2
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[405] | 239 | if (not defined $p2) {
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[415] | 240 | # exit if no p1 either
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[424] | 241 | next if ((not defined $p1) || (not defined $ENV{'PBPROJ'}));
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[409] | 242 | # No ref in p2 so use p1
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[405] | 243 | $p1->{$ENV{'PBPROJ'}} = $p1->{'default'} if ((not defined $p1->{$ENV{'PBPROJ'}}) && (defined $p1->{'default'}));
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| 244 | } else {
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[409] | 245 | # Ref found in p2
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[405] | 246 | if (not defined $p1) {
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[409] | 247 | # No ref in p1 so use p2's value
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[405] | 248 | $p2->{$ENV{'PBPROJ'}} = $p2->{'default'} if ((not defined $p2->{$ENV{'PBPROJ'}}) && (defined $p2->{'default'}));
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| 249 | $p1 = $p2;
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| 250 | } else {
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| 251 | # Both are defined - handling the overloading
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| 252 | if (not defined $p1->{'default'}) {
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| 253 | if (defined $p2->{'default'}) {
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| 254 | $p1->{'default'} = $p2->{'default'};
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| 255 | }
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| 256 | }
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| 257 |
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| 258 | if (not defined $p1->{$ENV{'PBPROJ'}}) {
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| 259 | if (defined $p2->{$ENV{'PBPROJ'}}) {
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| 260 | $p1->{$ENV{'PBPROJ'}} = $p2->{$ENV{'PBPROJ'}} if (defined $p2->{$ENV{'PBPROJ'}});
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| 261 | } else {
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| 262 | $p1->{$ENV{'PBPROJ'}} = $p1->{'default'} if (defined $p1->{'default'});
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| 263 | }
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| 264 | }
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| 265 | # Now copy back into p1 all p2 content which doesn't exist in p1
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[409] | 266 | # p1 content always has priority over p2
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[405] | 267 | foreach my $k (keys %$p2) {
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| 268 | $p1->{$k} = $p2->{$k} if (not defined $p1->{$k});
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| 269 | }
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| 270 | }
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| 271 | }
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| 272 | $ptr1[$i] = $p1;
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| 273 | }
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[415] | 274 | pb_log(2,"DEBUG: pb_conf_get output: ".Dumper(@ptr1)."\n");
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[409] | 275 | return(\@ptr1);
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[405] | 276 | }
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| 277 |
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[409] | 278 | =item B<pb_conf_get>
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[405] | 279 |
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[409] | 280 | 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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| 281 |
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| 282 | =cut
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| 283 |
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| 284 | sub pb_conf_get {
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| 285 |
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| 286 | my @param = @_;
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| 287 | my @return = pb_conf_get_if(@param);
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| 288 |
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| 289 | die "No params found for $ENV{'PBPROJ'}" if (not @return);
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| 290 |
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| 291 | foreach my $i (0..$#param) {
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| 292 | die "No $param[$i] defined for $ENV{'PBPROJ'}" if (not defined $return[$i]);
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| 293 | }
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| 294 | return(@return);
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| 295 | }
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| 296 |
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[405] | 297 | =back
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| 298 |
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| 299 | =head1 WEB SITES
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| 300 |
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| 301 | 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/>.
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| 302 |
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| 303 | =head1 USER MAILING LIST
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| 304 |
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| 305 | None exists for the moment.
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| 306 |
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| 307 | =head1 AUTHORS
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| 308 |
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| 309 | The Project-Builder.org team L<http://trac.project-builder.org/> lead by Bruno Cornec L<mailto:bruno@project-builder.org>.
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| 310 |
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| 311 | =head1 COPYRIGHT
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| 312 |
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| 313 | Project-Builder.org is distributed under the GPL v2.0 license
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| 314 | described in the file C<COPYING> included with the distribution.
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| 315 |
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| 316 | =cut
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| 317 |
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| 318 |
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| 319 | 1;
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