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# Copyright (c) 1997-2024
# Ewgenij Gawrilow, Michael Joswig, and the polymake team
# Technische Universität Berlin, Germany
# https://polymake.org
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any
# later version: http://www.gnu.org/licenses/gpl.txt.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#-------------------------------------------------------------------------------
use strict;
package Polymake;
# additional directories to try => first writable directory for tempfiles
sub find_writable_dir {
foreach ($ENV{TMPDIR}, "/tmp", "/var/tmp", @_, ".") {
return $_ if defined($_) && -d $_ && -w _ && -x _;
}
die <<'.';
Cannot find a writable directory for temporary files.
Please set TMPDIR environment variable to a suitable path.
.
}
# "filename" (relative), [ "dir", ... ] => full_path || undef
sub find_file_in_path {
my ($filename, $dirs)=@_;
my $full_path;
foreach my $dir (@$dirs) {
-f ($full_path="$dir/$filename") and return $full_path;
}
undef
}
# replace ~ with $HOME and remove trailing slashes
sub replace_special_paths {
foreach (@_) {
s{^~(?=/|$)}{$ENV{HOME}};
s{(?<!^)/$}{};
}
}
1
# Local Variables:
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
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