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#!/usr/bin/perl
# Perl reimplementation of PostgreSQL's pg_config binary.
# We provide this as /usr/bin/pg_config to support cross-compilation using
# libpq-dev. Also, this makes the two installed pg_config copies not conflict
# via their debugging symbols.
#
# This code is released under the terms of the PostgreSQL License.
# Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
# Author: Christoph Berg
use strict;
use warnings;
# no arguments, print all items
if (@ARGV == 0) {
while (<DATA>) {
last if /^$/; # begin of help section
print;
}
exit 0;
}
# --help or -?
if (grep {$_ =~ /^(--help|-\?)$/} @ARGV) {
while (<DATA>) {
last if /^$/; # begin of help section
}
print; # include empty line in output
while (<DATA>) {
next if /^Report bugs/; # Skip bug address in the perl version
print;
}
exit 0;
}
# specific value(s) requested
my %options;
my $help;
while (<DATA>) {
last if /^$/; # begin of help section
/^(\S+) = (.*)/ or die "malformatted data item";
$options{'--' . lc $1} = $2;
}
foreach my $arg (@ARGV) {
unless ($options{$arg}) {
print "pg_config: invalid argument: $arg\n";
print "Try \"pg_config --help\" for more information.\n";
exit 1;
}
print "$options{$arg}\n";
}
exit 0;
# The DATA section consists of the `pg_config` output (one KEY = value item per
# line), and the `pg_config --help` text. The first --help line is empty, which
# we use to detect the beginning of the help section.
__DATA__
INCLUDEDIR = /usr/include/postgresql
pg_config provides information about the installed version of PostgreSQL.
Usage:
pg_config [OPTION]...
Options:
--includedir show location of C header files of the client
interfaces
-?, --help show this help, then exit
With no arguments, all known items are shown.
Report bugs to <pgsql-bugs@postgresql.org>.
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