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# Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#
# utility functions for reading and setting environment defaults
package Yahoo::Vespa::Defaults;
use strict;
use warnings;
use Carp ();
BEGIN { # - Define exports from this module
use base 'Exporter';
our @EXPORT = qw(
considerFallback
readConfFile
);
}
return 1;
########################## Default exported functions ########################
sub considerFallback {
my ( $varname, $value ) = @_;
my $prevVal = $ENV{$varname};
if ( ! defined $value || $value eq '' ) {
# print STDERR " (debug) skipping empty value for $varname\n";
return;
}
if ( defined $prevVal && ! $prevVal eq '' ) {
# print STDERR " (debug) $varname already is '$prevVal', skipping new value '$value'\n";
return;
}
$ENV{$varname} = $value;
}
# Use this function to
sub readConfFile {
my $vHome = $ENV{'VESPA_HOME'};
if ( $vHome eq "" || ! -d $vHome ) {
die "Bad or missing VESPA_HOME environment variable $vHome\n";
}
my $deffile = $vHome . '/conf/vespa/default-env.txt' ;
if ( -f $deffile ) {
open(DEFFILE, $deffile) or die "Cannot open '$deffile'\n";
while (<DEFFILE>) {
chomp;
my ( $action, $varname, $value ) = split(' ', $_, 3);
if ( $varname !~ m{^\w+$} ) {
# print STDERR "INVALID variable name '$varname' in $deffile, skipping\n";
next;
}
if ( $action eq 'fallback' ) {
considerFallback($varname, $value);
}
}
close(DEFFILE);
}
}
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