Env::ShellWords - Environment variables for arguments as array
version 0.02
# Tie Interface use Env::ShellWords; tie my @CFLAGS, 'Env::ShellWords', 'CFLAGS'; tie my @LDFLAGS, 'Env::ShellWords', 'LDFLAGS'; # same thing with import interface: use Env::ShellWords qw( @CFLAGS @LDFLAGS ); # usage: $ENV{CFLAGS} = '-DBAR=1'; unshift @CFLAGS, '-I/foo/include'; push @CFLAGS, '-DFOO=Define With Spaces'; # now: # $ENV{CFLAGS} = '-I/foo/include -DBAR=1 -DFOO=Define\\ With\\ Spaces'; unshift @LDFLAGS, '-L/foo/lib'; push @LDFLAGS, '-lfoo';
This module provides an array like interface to environment variables that contain flags. For example Autoconf can uses the environment variables like CFLAGS or LDFLAGS, and this allows you to manipulate those variables without doing space quoting and other messy mucky stuff.
CFLAGS
LDFLAGS
The intent is to use this from alienfile to deal with hierarchical prerequisites.
You can provide split and join callbacks when you tie:
use Env::ShellWords; # split on any space, ignore quotes tie my @FOO, 'Env::ShellWords', sub { split /\s+/, $_[0] }, sub { join ' ', @_ };
Which may be useful if you have to split on words on an operating system with a different specification.
Not especially fast. undef gets mapped to the empty string '' since undef doesn't have a meaning as an argument in a string.
undef
''
Writing to an environment variable using this interface is inherently lossy.
Env
Graham Ollis <plicease@cpan.org>
This software is copyright (c) 2017 by Graham Ollis.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
To install Env::ShellWords, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Env::ShellWords
CPAN shell
perl -MCPAN -e shell install Env::ShellWords
For more information on module installation, please visit the detailed CPAN module installation guide.