[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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[2032] | 7 | # Copyright B. Cornec 2007-2016
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[1528] | 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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[405] | 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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[1507] | 17 | use Carp 'confess';
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[405] | 18 | use Data::Dumper;
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| 19 | use ProjectBuilder::Base;
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[1148] | 20 | use ProjectBuilder::Version;
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[405] | 21 |
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| 22 | # Inherit from the "Exporter" module which handles exporting functions.
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| 23 |
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[1156] | 24 | use vars qw($VERSION $REVISION @ISA @EXPORT);
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[405] | 25 | use Exporter;
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| 26 |
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| 27 | # Export, by default, all the functions into the namespace of
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| 28 | # any code which uses this module.
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| 29 |
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| 30 | our @ISA = qw(Exporter);
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[2154] | 31 | our @EXPORT = qw(pb_conf_init pb_conf_add pb_conf_read pb_conf_read_if pb_conf_write pb_conf_get pb_conf_get_if pb_conf_get_all pb_conf_get_hash pb_conf_cache);
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[1156] | 32 | ($VERSION,$REVISION) = pb_version_init();
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[405] | 33 |
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[898] | 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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[409] | 38 |
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[1495] | 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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[898] | 43 | # We consider that values can not change during the life of pb
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[1495] | 44 | my $h = ();
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[898] | 45 |
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[405] | 46 | =pod
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| 47 |
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| 48 | =head1 NAME
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| 49 |
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| 50 | ProjectBuilder::Conf, part of the project-builder.org - module dealing with configuration files
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| 51 |
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| 52 | =head1 DESCRIPTION
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| 53 |
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| 54 | This modules provides functions dealing with configuration files.
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| 55 |
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| 56 | =head1 SYNOPSIS
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| 57 |
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| 58 | use ProjectBuilder::Conf;
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| 59 |
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| 60 | #
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| 61 | # Read hash codes of values from a configuration file and return table of pointers
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| 62 | #
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| 63 | my ($k1, $k2) = pb_conf_read_if("$ENV{'HOME'}/.pbrc","key1","key2");
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| 64 | my ($k) = pb_conf_read("$ENV{'HOME'}/.pbrc","key");
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| 65 |
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| 66 | =head1 USAGE
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| 67 |
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[2152] | 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 | 1. /usr/share/pb/pb.conf - the read-only system conf file provided by install
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| 72 | 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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| 73 | 3. /path/to/project.pb - Configuration file for the project we're building for
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| 74 | 4. /(vm|ve|rm)path/to/.pbrc - configuration file for VM, VE or RM specific parameters. Cumulative should be orthogonal
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| 75 | 5. $HOME/.pbrc - user's configuration file
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| 76 |
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[405] | 77 | =over 4
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| 78 |
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[505] | 79 | =item B<pb_conf_init>
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| 80 |
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[898] | 81 | This function setup the environment PBPROJ for project-builder function usage from other projects.
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[505] | 82 | The first parameter is the project name.
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[898] | 83 | It sets up environment variables (PBPROJ)
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[505] | 84 |
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| 85 | =cut
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| 86 |
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| 87 | sub pb_conf_init {
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| 88 |
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[1907] | 89 | my $proj=shift;
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[505] | 90 |
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[1495] | 91 | pb_log(1,"Entering pb_conf_init\n");
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[1584] | 92 | #
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| 93 | # Check project name
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| 94 | # Could be with env var PBPROJ
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| 95 | # or option -p
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| 96 | # if not defined take the first in conf file
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| 97 | #
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| 98 | if ((defined $ENV{'PBPROJ'}) &&
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| 99 | (not defined $proj)) {
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| 100 | pb_log(2,"PBPROJ env var setup ($ENV{'PBPROJ'}) so using it\n");
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| 101 | $proj = $ENV{'PBPROJ'};
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| 102 | }
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| 103 |
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[505] | 104 | if (defined $proj) {
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| 105 | $ENV{'PBPROJ'} = $proj;
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| 106 | } else {
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| 107 | $ENV{'PBPROJ'} = "default";
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| 108 | }
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[1495] | 109 | pb_log(1,"PBPROJ = $ENV{'PBPROJ'}\n");
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[505] | 110 | }
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| 111 |
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| 112 |
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[1495] | 113 | =item B<pb_conf_cache>
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[505] | 114 |
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[1495] | 115 | This function caches the configuration file content passed as first parameter into the a hash passed in second parameter
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| 116 | It returns the modified hash
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| 117 | Can be used in correlation with the %h hash to store permanently values or not if temporarily.
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| 118 |
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| 119 | =cut
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| 120 |
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| 121 | sub pb_conf_cache {
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| 122 |
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| 123 | my $cf = shift;
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| 124 | my $lh = shift;
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| 125 |
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[2077] | 126 | # Read the content of the config file and cache it in the %h hash then available for queries
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[1538] | 127 | open(CONF,$cf) || confess "Unable to open $cf";
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[1495] | 128 | while(<CONF>) {
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[1905] | 129 | next if (/^#/);
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[2077] | 130 | if (/^\s*([A-z0-9-_.]+)\s+([[A-z0-9-_.\?\[\]\*\+\\]+)\s*=\s*(.*)$/) {
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[1495] | 131 | pb_log(3,"DEBUG: 1:$1 2:$2 3:$3\n");
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| 132 | $lh->{$1}->{$2}=$3;
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| 133 | }
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| 134 | }
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| 135 | close(CONF);
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| 136 | return($lh);
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| 137 | }
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| 138 |
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[409] | 139 | =item B<pb_conf_add>
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| 140 |
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[1495] | 141 | This function adds the configuration file to the list last, and cache their content in the %h hash
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[409] | 142 |
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| 143 | =cut
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| 144 |
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| 145 | sub pb_conf_add {
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| 146 |
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[415] | 147 | pb_log(2,"DEBUG: pb_conf_add with ".Dumper(@_)."\n");
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[1495] | 148 | my $lh;
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[898] | 149 |
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| 150 | foreach my $cf (@_) {
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[1495] | 151 | if (! -r $cf) {
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| 152 | pb_log(0,"WARNING: pb_conf_add can not read $cf\n");
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| 153 | next;
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| 154 | }
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[898] | 155 | # Skip already used conf files
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[1495] | 156 | return($lh) if (defined $pbconffiles{$cf});
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| 157 |
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[2154] | 158 | # The new conf file overload values already managed
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[898] | 159 | my $num = keys %pbconffiles;
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[1495] | 160 | pb_log(2,"DEBUG: pb_conf_cache of $cf at position $num\n");
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[898] | 161 | $pbconffiles{$cf} = $num;
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[1495] | 162 |
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| 163 | # Read the content of the config file
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| 164 | $lh = pb_conf_cache($cf,$lh);
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| 165 | # and cache it in the %h hash for further queries but after the previous
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| 166 | # as we load conf files in reverse order (most precise first)
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| 167 | pb_conf_add_last_in_hash($lh)
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[409] | 168 | }
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[898] | 169 | }
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[409] | 170 |
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[1495] | 171 |
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[405] | 172 | =item B<pb_conf_read_if>
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| 173 |
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| 174 | This function returns a table of pointers on hashes
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| 175 | corresponding to the keys in a configuration file passed in parameter.
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| 176 | If that file doesn't exist, it returns undef.
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| 177 |
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| 178 | The format of the configuration file is as follows:
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| 179 |
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| 180 | key tag = value1,value2,...
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| 181 |
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| 182 | Supposing the file is called "$ENV{'HOME'}/.pbrc", containing the following:
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| 183 |
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| 184 | $ cat $HOME/.pbrc
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| 185 | pbver pb = 3
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| 186 | pbver default = 1
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| 187 | pblist pb = 12,25
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| 188 |
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| 189 | calling it like this:
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| 190 |
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| 191 | my ($k1, $k2) = pb_conf_read_if("$ENV{'HOME'}/.pbrc","pbver","pblist");
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| 192 |
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| 193 | will allow to get the mapping:
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| 194 |
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| 195 | $k1->{'pb'} contains 3
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[409] | 196 | $k1->{'default'} contains 1
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[405] | 197 | $k2->{'pb'} contains 12,25
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| 198 |
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| 199 | Valid chars for keys and tags are letters, numbers, '-' and '_'.
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| 200 |
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[1495] | 201 | 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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| 202 |
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[405] | 203 | =cut
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| 204 |
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| 205 | sub pb_conf_read_if {
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| 206 |
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| 207 | my $conffile = shift;
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| 208 | my @param = @_;
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| 209 |
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| 210 | open(CONF,$conffile) || return((undef));
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| 211 | close(CONF);
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| 212 | return(pb_conf_read($conffile,@param));
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| 213 | }
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| 214 |
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| 215 | =item B<pb_conf_read>
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| 216 |
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| 217 | 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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| 218 |
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| 219 | =cut
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| 220 |
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| 221 | sub pb_conf_read {
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| 222 |
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| 223 | my $conffile = shift;
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| 224 | my @param = @_;
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| 225 | my @ptr;
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[1495] | 226 | my $lh;
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[405] | 227 |
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[1495] | 228 | $lh = pb_conf_cache($conffile,$lh);
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| 229 |
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| 230 | foreach my $param (@param) {
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| 231 | push @ptr,$lh->{$param};
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[405] | 232 | }
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[1495] | 233 | return(@ptr);
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| 234 | }
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[405] | 235 |
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[1904] | 236 | =item B<pb_conf_write>
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[1495] | 237 |
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[1904] | 238 | This function writes in the file passed ias first parameter the hash of values passed as second parameter
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[1495] | 239 |
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[1904] | 240 | =cut
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| 241 |
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| 242 | sub pb_conf_write {
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| 243 |
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| 244 | my $conffile = shift;
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[1905] | 245 | my $h = shift;
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[1904] | 246 |
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[1905] | 247 | confess "No configuration file defined to write into !" if (not defined $conffile);
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| 248 | confess "No hash defined to read from !" if (not defined $h);
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| 249 | open(CONF,"> $conffile") || confess "Unable to write into $conffile";
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[1904] | 250 |
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[1907] | 251 | foreach my $p (sort keys %$h) {
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[1905] | 252 | my $j = $h->{$p};
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[1907] | 253 | foreach my $k (sort keys %$j) {
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[1905] | 254 | print CONF "$p $k = $j->{$k}\n";
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[1904] | 255 | }
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| 256 | }
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| 257 | close(CONF);
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| 258 | }
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| 259 |
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| 260 |
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| 261 |
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[1495] | 262 | =item B<pb_conf_get_in_hash_if>
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| 263 |
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[1594] | 264 | 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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| 265 | It takes a table of keys as an input parameter.
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[1495] | 266 |
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| 267 | =cut
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| 268 |
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| 269 | sub pb_conf_get_in_hash_if {
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| 270 |
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| 271 | my $lh = shift || return(());
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| 272 | my @params = @_;
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| 273 | my @ptr = ();
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| 274 |
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| 275 | pb_log(2,"DEBUG: pb_conf_get_in_hash_if on params ".join(' ',@params)."\n");
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| 276 | foreach my $k (@params) {
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| 277 | push @ptr,$lh->{$k};
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[405] | 278 | }
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[1495] | 279 |
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| 280 | pb_log(2,"DEBUG: pb_conf_get_in_hash_if returns\n".Dumper(@ptr));
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[405] | 281 | return(@ptr);
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| 282 | }
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| 283 |
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[1495] | 284 |
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| 285 |
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[409] | 286 | =item B<pb_conf_get_if>
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[405] | 287 |
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[1495] | 288 | 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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[405] | 289 |
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[409] | 290 | The format of the configurations file is as follows:
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| 291 |
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| 292 | key tag = value1,value2,...
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| 293 |
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[1495] | 294 | It will gather the values from all the configurations files passed to pb_conf_add, and return the values for the keys
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[409] | 295 |
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| 296 | $ cat $HOME/.pbrc
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| 297 | pbver pb = 1
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| 298 | pblist pb = 4
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| 299 | $ cat $HOME/.pbrc2
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| 300 | pbver pb = 3
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| 301 | pblist default = 5
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| 302 |
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| 303 | calling it like this:
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| 304 |
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[505] | 305 | pb_conf_add("$HOME/.pbrc","$HOME/.pbrc2");
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[409] | 306 | my ($k1, $k2) = pb_conf_get_if("pbver","pblist");
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| 307 |
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| 308 | will allow to get the mapping:
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| 309 |
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| 310 | $k1->{'pb'} contains 3
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| 311 | $k2->{'pb'} contains 4
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| 312 |
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| 313 | Valid chars for keys and tags are letters, numbers, '-' and '_'.
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| 314 |
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| 315 | =cut
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| 316 |
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| 317 | sub pb_conf_get_if {
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| 318 |
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[2154] | 319 | my @param = @_;
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| 320 | my @return = pb_conf_get_in_hash_if($h,@_);
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| 321 | my $proj = undef;
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| 322 |
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| 323 | if (not defined $ENV{'PBPROJ'}) {
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| 324 | $proj = "unknown";
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| 325 | } else {
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| 326 | $proj = $ENV{'PBPROJ'};
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[405] | 327 | }
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[409] | 328 |
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[2154] | 329 | foreach my $i (0..$#param) {
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| 330 | if (not defined $return[$i]->{$proj}) {
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| 331 | $return[$i]->{$proj} = $return[$i]->{'default'} if (defined $return[$i]->{'default'});
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| 332 | }
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| 333 | }
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| 334 | return(@return);
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| 335 | }
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| 336 |
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[1495] | 337 | =item B<pb_conf_add_last_in_hash>
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[405] | 338 |
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[1495] | 339 | 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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[405] | 340 |
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[1495] | 341 | It is used internally by pb_conf_add and is not exported.
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[409] | 342 |
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| 343 | =cut
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| 344 |
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[1495] | 345 | sub pb_conf_add_last_in_hash {
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[409] | 346 |
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[1907] | 347 | my $ptr = shift;
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[409] | 348 |
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[1495] | 349 | return if (not defined $ptr);
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| 350 | # TODO: test $ptr is a hash pointer
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[405] | 351 |
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[1509] | 352 | # When called without correct initialization, try to work anyway with default as project
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| 353 | pb_conf_init("default") if (not defined $ENV{'PBPROJ'});
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| 354 |
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[1495] | 355 | my @params = (sort keys %$ptr);
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[405] | 356 |
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[1495] | 357 | # Everything is returned via @h
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| 358 | # @h contains the values overloading what @ptr may contain.
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[2154] | 359 | my @h = pb_conf_get_in_hash_if($h,@params);
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[1495] | 360 | my @ptr = pb_conf_get_in_hash_if($ptr,@params);
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[409] | 361 |
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[405] | 362 | my $p1;
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| 363 | my $p2;
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| 364 |
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[1495] | 365 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash params: ".Dumper(@params)."\n");
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[2154] | 366 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash current hash: ".Dumper(@h)."\n");
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| 367 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash new inputs: ".Dumper(@ptr)."\n");
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[405] | 368 |
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[1495] | 369 | foreach my $i (0..$#params) {
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| 370 | $p1 = $h[$i];
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| 371 | $p2 = $ptr[$i];
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[2154] | 372 | # Always try to take the param from h in priority
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[1495] | 373 | # in order to mask what could be defined already in ptr
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[405] | 374 | if (not defined $p2) {
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[415] | 375 | # exit if no p1 either
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[1509] | 376 | next if (not defined $p1);
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[405] | 377 | } else {
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[409] | 378 | # Ref found in p2
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[405] | 379 | if (not defined $p1) {
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[409] | 380 | # No ref in p1 so use p2's value
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[405] | 381 | $p1 = $p2;
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| 382 | } else {
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| 383 | # Both are defined - handling the overloading
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[2154] | 384 | # Now copy back into p1 all p2 content
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| 385 | # as p1 content always has priority over p2
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[405] | 386 | if (not defined $p1->{$ENV{'PBPROJ'}}) {
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| 387 | if (defined $p2->{$ENV{'PBPROJ'}}) {
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[1594] | 388 | $p1->{$ENV{'PBPROJ'}} = $p2->{$ENV{'PBPROJ'}};
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[405] | 389 | }
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| 390 | }
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| 391 | # Now copy back into p1 all p2 content which doesn't exist in p1
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[2154] | 392 | # # p1 content always has priority over p2
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[405] | 393 | foreach my $k (keys %$p2) {
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| 394 | $p1->{$k} = $p2->{$k} if (not defined $p1->{$k});
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| 395 | }
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| 396 | }
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| 397 | }
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[1495] | 398 | $h->{$params[$i]} = $p1;
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[405] | 399 | }
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[1495] | 400 | pb_log(2,"DEBUG: pb_conf_add_last_in_hash output: ".Dumper($h)."\n");
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[405] | 401 | }
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| 402 |
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[409] | 403 | =item B<pb_conf_get>
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[405] | 404 |
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[409] | 405 | 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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| 406 |
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| 407 | =cut
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| 408 |
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| 409 | sub pb_conf_get {
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| 410 |
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| 411 | my @param = @_;
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| 412 | my @return = pb_conf_get_if(@param);
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[932] | 413 | my $proj = undef;
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[409] | 414 |
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[932] | 415 | if (not defined $ENV{'PBPROJ'}) {
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| 416 | $proj = "unknown";
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| 417 | } else {
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| 418 | $proj = $ENV{'PBPROJ'};
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| 419 | }
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[409] | 420 |
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[1538] | 421 | confess "No params found for $proj" if (not @return);
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[932] | 422 |
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[409] | 423 | foreach my $i (0..$#param) {
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[1507] | 424 | confess "No $param[$i] defined for $proj" if (not defined $return[$i]);
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[409] | 425 | }
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| 426 | return(@return);
|
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| 427 | }
|
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| 428 |
|
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[1495] | 429 |
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[1694] | 430 | =item B<pb_conf_get_all>
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| 431 |
|
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[2077] | 432 | This function returns an array with all configuration parameters
|
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[1694] | 433 |
|
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| 434 | =cut
|
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| 435 |
|
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| 436 | sub pb_conf_get_all {
|
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| 437 |
|
---|
| 438 | return(sort keys %$h);
|
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| 439 | }
|
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| 440 |
|
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[2077] | 441 |
|
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| 442 | =item B<pb_conf_get_hash>
|
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| 443 |
|
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| 444 | This function returns a pointer to the hash with all configuration parameters
|
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| 445 |
|
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| 446 | =cut
|
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| 447 |
|
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| 448 | sub pb_conf_get_hash {
|
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| 449 |
|
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| 450 | return($h);
|
---|
| 451 | }
|
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| 452 |
|
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[405] | 453 | =back
|
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| 454 |
|
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| 455 | =head1 WEB SITES
|
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| 456 |
|
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| 457 | 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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| 458 |
|
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| 459 | =head1 USER MAILING LIST
|
---|
| 460 |
|
---|
| 461 | None exists for the moment.
|
---|
| 462 |
|
---|
| 463 | =head1 AUTHORS
|
---|
| 464 |
|
---|
| 465 | The Project-Builder.org team L<http://trac.project-builder.org/> lead by Bruno Cornec L<mailto:bruno@project-builder.org>.
|
---|
| 466 |
|
---|
| 467 | =head1 COPYRIGHT
|
---|
| 468 |
|
---|
| 469 | Project-Builder.org is distributed under the GPL v2.0 license
|
---|
| 470 | described in the file C<COPYING> included with the distribution.
|
---|
| 471 |
|
---|
| 472 | =cut
|
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| 473 |
|
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| 474 |
|
---|
| 475 | 1;
|
---|