mirror of
https://git.savannah.gnu.org/git/parallel.git
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119 lines
3.9 KiB
Bash
Executable file
119 lines
3.9 KiB
Bash
Executable file
#!/usr/bin/env ksh
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# This file must be sourced in ksh:
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#
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# source `which env_parallel.ksh`
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#
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# after which 'env_parallel' works
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#
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#
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# Copyright (C) 2016
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# Ole Tange and Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, see <http://www.gnu.org/licenses/>
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# or write to the Free Software Foundation, Inc., 51 Franklin St,
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# Fifth Floor, Boston, MA 02110-1301 USA
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env_parallel() {
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# env_parallel.ksh
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# Get the --env variables if set
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# --env _ should be ignored
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# and convert a b c to (a|b|c)
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# If --env not set: Match everything (.*)
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_grep_REGEXP="$(
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perl -e '
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for(@ARGV){
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/^_$/ and $next_is_env = 0;
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$next_is_env and push @envvar, split/,/, $_;
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$next_is_env = /^--env$/;
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}
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$vars = join "|",map { quotemeta $_ } @envvar;
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print $vars ? "($vars)" : "(.*)";
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' -- "$@"
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)"
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# Deal with --env _
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_ignore_UNDERSCORE="$(
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perl -e '
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for(@ARGV){
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$next_is_env and push @envvar, split/,/, $_;
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$next_is_env=/^--env$/;
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}
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if(grep { /^_$/ } @envvar) {
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if(not open(IN, "<", "$ENV{HOME}/.parallel/ignored_vars")) {
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print STDERR "parallel: Error: ",
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"Run \"parallel --record-env\" in a clean environment first.\n";
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} else {
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chomp(@ignored_vars = <IN>);
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$vars = join "|",map { quotemeta $_ } "env_parallel", @ignored_vars;
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print $vars ? "($vars)" : "(,,nO,,VaRs,,)";
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}
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}
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' -- "$@"
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)"
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# --record-env
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if ! perl -e 'exit grep { /^--record-env$/ } @ARGV' -- "$@"; then
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(alias | perl -pe 's/=.*//';
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typeset +p -f | perl -pe 's/\(\).*//';
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typeset +p | perl -pe 's/^typeset .. //') |
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cat > $HOME/.parallel/ignored_vars
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return 0
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fi
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# Grep alias names
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_alias_NAMES="$(alias | perl -pe 's/=.*//' |
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grep -E "^$_grep_REGEXP"\$ | grep -vE "^$_ignore_UNDERSCORE"\$ )"
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_list_alias_BODIES="alias $_alias_NAMES | perl -pe 's/^/alias /'"
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if [[ "$_alias_NAMES" = "" ]] ; then
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# no aliases selected
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_list_alias_BODIES="true"
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fi
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unset _alias_NAMES
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# Grep function names
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_function_NAMES="$(typeset +p -f | perl -pe 's/\(\).*//' |
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grep -E "^$_grep_REGEXP"\$ | grep -vE "^$_ignore_UNDERSCORE"\$ )"
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_list_function_BODIES="typeset -f $_function_NAMES"
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if [[ "$_function_NAMES" = "" ]] ; then
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# no functions selected
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_list_function_BODIES="true"
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fi
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unset _function_NAMES
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# Grep variable names
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_variable_NAMES="$(typeset +p | perl -pe 's/^typeset .. //' |
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grep -E "^$_grep_REGEXP"\$ | grep -vE "^$_ignore_UNDERSCORE"\$ |
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grep -Ev '^(PIPESTATUS)$')"
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_list_variable_VALUES="typeset -p $_variable_NAMES"
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if [[ "$_variable_NAMES" = "" ]] ; then
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# no variables selected
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_list_variable_VALUES="true"
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fi
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unset _variable_NAMES
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# eval is needed for aliases - cannot explain why
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export PARALLEL_ENV="$(
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eval $_list_alias_BODIES;
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$_list_variable_VALUES;
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$_list_function_BODIES)";
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unset _list_alias_BODIES
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unset _list_variable_VALUES
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unset _list_function_BODIES
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`which parallel` "$@";
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_parallel_exit_CODE=$?
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unset PARALLEL_ENV;
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return $_parallel_exit_CODE
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}
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