#!/usr/bin/perl -w =encoding utf8 =head1 NAME env_parallel - export environment to GNU parallel =head1 SYNOPSIS B [options for GNU Parallel] =head1 DESCRIPTION B is a shell function that exports the current environment to GNU B. If the shell function is not loaded, a dummy script will be run instead that explains how to install the function. B is beta quality and not production ready. B is 0.1 sec slower at startup than pure GNU B, and takes up to 15 ms to start a job. Due to the problem with environment space (see below) the recommended usage is: # Run once to record the "empty" environment env_parallel --record-env # Define whatever you want to use alias myalias=echo myvar=it myfunc() { myalias $1 $myvar works.; } # Use --env _ to only transfer the names not in the "empty" environment env_parallel --env _ -S localhost myfunc ::: Yay, In B: # Run once to record the "empty" environment env_parallel --record-env # Define whatever you want to use alias myalias 'echo \!* $myvar works.' set myvar=it # Use --env _ to only transfer the names not in the "empty" environment env_parallel --env _ -S localhost myalias ::: Yay, =head2 Environment space By default B will export all environment variables, arrays, aliases, functions and shell options (see details for the individual shells below). But this only works if the size of the current environment is smaller than the maximal length of a command and smaller than half of the max if running remotely. E.g. The max size of Bash's command is 128 KB, so B will fail if B is bigger than 128 KB. Technically the limit is in execve(1) which IPC::open3 uses. Bash completion functions are well-known for taking up well over 128 KB of environment space and the primary reason for causing B to fail. Instead you can use B<--env> to specify which variables, arrays, aliases and functions to export as this will only export those with the given name. =head1 OPTIONS Same as GNU B. =head1 SUPPORTED SHELLS =head2 Bash B<--env> is supported to export only the variable, alias, function, or array with the given name. Multiple B<--env>s can be given. Installation Put this in $HOME/.bashrc: . `which env_parallel.bash` E.g. by doing: echo '. `which env_parallel.bash`' >> $HOME/.bashrc =over 8 =item aliases alias myecho='echo aliases' env_parallel myecho ::: work env_parallel -S server myecho ::: work env_parallel --env myecho myecho ::: work env_parallel --env myecho -S server myecho ::: work =item functions myfunc() { echo functions $*; } env_parallel myfunc ::: work env_parallel -S server myfunc ::: work env_parallel --env myfunc myfunc ::: work env_parallel --env myfunc -S server myfunc ::: work =item variables myvar=variables env_parallel echo '$myvar' ::: work env_parallel -S server echo '$myvar' ::: work env_parallel --env myvar echo '$myvar' ::: work env_parallel --env myvar -S server echo '$myvar' ::: work =item arrays myarray=(arrays work, too) env_parallel -k echo '${myarray[{}]}' ::: 0 1 2 env_parallel -k -S server echo '${myarray[{}]}' ::: 0 1 2 env_parallel -k --env myarray echo '${myarray[{}]}' ::: 0 1 2 env_parallel -k --env myarray -S server echo '${myarray[{}]}' ::: 0 1 2 =back =head2 csh B<--env> is supported to export only the variable, alias, or array with the given name. Multiple B<--env>s can be given. B for B breaks B<$PARALLEL>, so do not use B<$PARALLEL>. Installation Put this in $HOME/.cshrc: source `which env_parallel.csh` E.g. by doing: echo 'source `which env_parallel.csh`' >> $HOME/.cshrc =over 8 =item aliases alias myecho 'echo aliases' env_parallel myecho ::: work env_parallel -S server myecho ::: work env_parallel --env myecho myecho ::: work env_parallel --env myecho -S server myecho ::: work =item functions Not supported by B. =item variables set myvar=variables env_parallel echo '$myvar' ::: work env_parallel -S server echo '$myvar' ::: work env_parallel --env myvar echo '$myvar' ::: work env_parallel --env myvar -S server echo '$myvar' ::: work =item arrays with no special chars set myarray=(arrays work, too) env_parallel -k echo \$'{myarray[{}]}' ::: 1 2 3 env_parallel -k -S server echo \$'{myarray[{}]}' ::: 1 2 3 env_parallel -k --env myarray echo \$'{myarray[{}]}' ::: 1 2 3 env_parallel -k --env myarray -S server echo \$'{myarray[{}]}' ::: 1 2 3 =back =head2 fish B<--env> is supported to export only the variable, alias, function, or array with the given name. Multiple B<--env>s can be given. Installation Put this in $HOME/.config/fish/config.fish: source (which env_parallel.fish) E.g. by doing: echo 'source (which env_parallel.fish)' >> $HOME/.config/fish/config.fish =over 8 =item aliases alias myecho 'echo aliases' env_parallel myecho ::: work env_parallel -S server myecho ::: work env_parallel --env myecho myecho ::: work env_parallel --env myecho -S server myecho ::: work =item functions function myfunc echo functions $argv end env_parallel myfunc ::: work env_parallel -S server myfunc ::: work env_parallel --env myfunc myfunc ::: work env_parallel --env myfunc -S server myfunc ::: work =item variables set myvar variables env_parallel echo '$myvar' ::: work env_parallel -S server echo '$myvar' ::: work env_parallel --env myvar echo '$myvar' ::: work env_parallel --env myvar -S server echo '$myvar' ::: work =item arrays set myarray arrays work, too env_parallel -k echo '$myarray[{}]' ::: 1 2 3 env_parallel -k -S server echo '$myarray[{}]' ::: 1 2 3 env_parallel -k --env myarray echo '$myarray[{}]' ::: 1 2 3 env_parallel -k --env myarray -S server echo '$myarray[{}]' ::: 1 2 3 =back =head2 ksh B<--env> is supported to export only the variable, alias, function, or array with the given name. Multiple B<--env>s can be given. Installation Put this in $HOME/.kshrc: source `which env_parallel.ksh` E.g. by doing: echo 'source `which env_parallel.ksh`' >> $HOME/.kshrc =over 8 =item aliases alias myecho='echo aliases' env_parallel myecho ::: work env_parallel -S server myecho ::: work env_parallel --env myecho myecho ::: work env_parallel --env myecho -S server myecho ::: work =item functions myfunc() { echo functions $*; } env_parallel myfunc ::: work env_parallel -S server myfunc ::: work env_parallel --env myfunc myfunc ::: work env_parallel --env myfunc -S server myfunc ::: work =item variables myvar=variables env_parallel echo '$myvar' ::: work env_parallel -S server echo '$myvar' ::: work env_parallel --env myvar echo '$myvar' ::: work env_parallel --env myvar -S server echo '$myvar' ::: work =item arrays myarray=(arrays work, too) env_parallel -k echo '${myarray[{}]}' ::: 0 1 2 env_parallel -k -S server echo '${myarray[{}]}' ::: 0 1 2 env_parallel -k --env myarray echo '${myarray[{}]}' ::: 0 1 2 env_parallel -k --env myarray -S server echo '${myarray[{}]}' ::: 0 1 2 =back =head2 pdksh B<--env> is supported to export only the variable, alias, function, or array with the given name. Multiple B<--env>s can be given. Installation Put this in $HOME/.profile: source `which env_parallel.pdksh` E.g. by doing: echo 'source `which env_parallel.pdksh`' >> $HOME/.profile =over 8 =item aliases alias myecho="echo aliases"; env_parallel myecho ::: work; env_parallel -S server myecho ::: work; env_parallel --env myecho myecho ::: work; env_parallel --env myecho -S server myecho ::: work =item functions myfunc() { echo functions $*; }; env_parallel myfunc ::: work; env_parallel -S server myfunc ::: work; env_parallel --env myfunc myfunc ::: work; env_parallel --env myfunc -S server myfunc ::: work =item variables myvar=variables; env_parallel echo "\$myvar" ::: work; env_parallel -S server echo "\$myvar" ::: work; env_parallel --env myvar echo "\$myvar" ::: work; env_parallel --env myvar -S server echo "\$myvar" ::: work =item arrays myarray=(arrays work, too); env_parallel -k echo "\${myarray[{}]}" ::: 0 1 2; env_parallel -k -S server echo "\${myarray[{}]}" ::: 0 1 2; env_parallel -k --env myarray echo "\${myarray[{}]}" ::: 0 1 2; env_parallel -k --env myarray -S server echo "\${myarray[{}]}" ::: 0 1 2 =back =head2 tcsh B<--env> is supported to export only the variable, alias, or array with the given name. Multiple B<--env>s can be given. B for B breaks B<$PARALLEL>, so do not use B<$PARALLEL>. Installation Put this in $HOME/.tcshrc: source `which env_parallel.tcsh` E.g. by doing: echo 'source `which env_parallel.tcsh`' >> $HOME/.tcshrc =over 8 =item aliases alias myecho 'echo aliases' env_parallel myecho ::: work env_parallel -S server myecho ::: work env_parallel --env myecho myecho ::: work env_parallel --env myecho -S server myecho ::: work =item functions Not supported by B. =item variables set myvar=variables env_parallel echo '$myvar' ::: work env_parallel -S server echo '$myvar' ::: work env_parallel --env myvar echo '$myvar' ::: work env_parallel --env myvar -S server echo '$myvar' ::: work =item arrays with no special chars set myarray=(arrays work, too) env_parallel -k echo \$'{myarray[{}]}' ::: 1 2 3 env_parallel -k -S server echo \$'{myarray[{}]}' ::: 1 2 3 env_parallel -k --env myarray echo \$'{myarray[{}]}' ::: 1 2 3 env_parallel -k --env myarray -S server echo \$'{myarray[{}]}' ::: 1 2 3 =back =head2 Zsh B<--env> is supported to export only the variable, alias, function, or array with the given name. Multiple B<--env>s can be given. Installation Put this in $HOME/.zshrc: . `which env_parallel.zsh` E.g. by doing: echo '. `which env_parallel.zsh`' >> $HOME/.zshenv =over 8 =item aliases alias myecho='echo aliases' env_parallel myecho ::: work env_parallel -S server myecho ::: work env_parallel --env myecho myecho ::: work env_parallel --env myecho -S server myecho ::: work =item functions myfunc() { echo functions $*; } env_parallel myfunc ::: work env_parallel -S server myfunc ::: work env_parallel --env myfunc myfunc ::: work env_parallel --env myfunc -S server myfunc ::: work =item variables myvar=variables env_parallel echo '$myvar' ::: work env_parallel -S server echo '$myvar' ::: work env_parallel --env myvar echo '$myvar' ::: work env_parallel --env myvar -S server echo '$myvar' ::: work =item arrays myarray=(arrays work, too) env_parallel -k echo '${myarray[{}]}' ::: 1 2 3 env_parallel -k -S server echo '${myarray[{}]}' ::: 1 2 3 env_parallel -k --env myarray echo '${myarray[{}]}' ::: 1 2 3 env_parallel -k --env myarray -S server echo '${myarray[{}]}' ::: 1 2 3 =back =head1 EXIT STATUS Same as GNU B. =head1 AUTHOR When using GNU B for a publication please cite: O. Tange (2011): GNU Parallel - The Command-Line Power Tool, ;login: The USENIX Magazine, February 2011:42-47. This helps funding further development; and it won't cost you a cent. If you pay 10000 EUR you should feel free to use GNU Parallel without citing. Copyright (C) 2007-10-18 Ole Tange, http://ole.tange.dk Copyright (C) 2008,2009,2010 Ole Tange, http://ole.tange.dk Copyright (C) 2010,2011,2012,2013,2014,2015,2016 Ole Tange, http://ole.tange.dk and Free Software Foundation, Inc. Parts of the manual concerning B compatibility is inspired by the manual of B from GNU findutils 4.4.2. =head1 LICENSE Copyright (C) 2016 Ole Tange and Free Software Foundation, Inc. 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 3 of the License, or at your option any later version. 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. You should have received a copy of the GNU General Public License along with this program. If not, see . =head2 Documentation license I Permission is granted to copy, distribute and/or modify this documentation under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the file fdl.txt. =head2 Documentation license II You are free: =over 9 =item B to copy, distribute and transmit the work =item B to adapt the work =back Under the following conditions: =over 9 =item B You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). =item B If you alter, transform, or build upon this work, you may distribute the resulting work only under the same, similar or a compatible license. =back With the understanding that: =over 9 =item B Any of the above conditions can be waived if you get permission from the copyright holder. =item B Where the work or any of its elements is in the public domain under applicable law, that status is in no way affected by the license. =item B In no way are any of the following rights affected by the license: =over 2 =item * Your fair dealing or fair use rights, or other applicable copyright exceptions and limitations; =item * The author's moral rights; =item * Rights other persons may have either in the work itself or in how the work is used, such as publicity or privacy rights. =back =back =over 9 =item B For any reuse or distribution, you must make clear to others the license terms of this work. =back A copy of the full license is included in the file as cc-by-sa.txt. =head1 DEPENDENCIES B uses GNU B. =head1 SEE ALSO B(1), B(1), B(1), B(1), B(1), B(1) B(1), B(1). =cut