mirror of
https://git.savannah.gnu.org/git/parallel.git
synced 2024-11-22 05:57:54 +00:00
431 lines
14 KiB
Bash
Executable file
431 lines
14 KiB
Bash
Executable file
#!/usr/bin/env bash
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# This file must be sourced in bash:
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#
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# source `which env_parallel.bash`
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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) 2016-2023 Ole Tange, http://ole.tange.dk and Free
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# 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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#
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# SPDX-FileCopyrightText: 2021-2023 Ole Tange, http://ole.tange.dk and Free Software and Foundation, Inc.
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# SPDX-License-Identifier: GPL-3.0-or-later
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# shellcheck disable=SC2006
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env_parallel() {
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# env_parallel.bash
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_names_of_ALIASES() {
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# No aliases will return false. This error should be ignored.
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compgen -a || true
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}
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_bodies_of_ALIASES() {
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local _i
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for _i in "$@"; do
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# shellcheck disable=SC2046
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if [ $(alias "$_i" | wc -l) == 1 ] ; then
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true Alias is a single line. Good.
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else
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_warning_PAR "Alias '$_i' contains newline."
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_warning_PAR "Make sure the command has at least one newline after '$_i'."
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_warning_PAR "See BUGS in 'man env_parallel'."
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fi
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done
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alias "$@"
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}
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_names_of_FUNCTIONS() {
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compgen -A function
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}
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_bodies_of_FUNCTIONS() {
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typeset -f "$@"
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}
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_names_of_VARIABLES() {
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compgen -A variable
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}
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_bodies_of_VARIABLES() {
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typeset -p "$@"
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}
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_ignore_HARDCODED() {
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# Copying $RANDOM will cause it not to be random
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# The rest cannot be detected as read-only
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echo '(RANDOM|_|TIMEOUT|GROUPS|FUNCNAME|DIRSTACK|PIPESTATUS|USERNAME|BASHPID|BASH_[A-Z_]+)'
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}
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_ignore_READONLY() {
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# shellcheck disable=SC1078,SC1079,SC2026
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readonly | perl -e '@r = map {
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chomp;
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# sh on UnixWare: readonly TIMEOUT
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# ash: readonly var='val'
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# ksh: var='val'
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# mksh: PIPESTATUS[0]
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s/^(readonly )?([^=\[ ]*?)(\[\d+\])?(=.*|)$/$2/ or
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# bash: declare -ar BASH_VERSINFO=([0]="4" [1]="4")
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# zsh: typeset -r var='val'
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s/^\S+\s+\S+\s+(\S[^=]*)(=.*|$)/$1/;
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$_ } <>;
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$vars = join "|",map { quotemeta $_ } @r;
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print $vars ? "($vars)" : "(,,nO,,VaRs,,)";
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'
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}
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_remove_bad_NAMES() {
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# Do not transfer vars and funcs from env_parallel
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# shellcheck disable=SC2006
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_ignore_RO="`_ignore_READONLY`"
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# shellcheck disable=SC2006
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_ignore_HARD="`_ignore_HARDCODED`"
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# To avoid depending on grep dialect, use Perl version of:
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# grep -Ev '^(...)$' |
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perl -ne '/^(
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PARALLEL_ENV|
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PARALLEL_TMP|
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_alias_NAMES|
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_bodies_of_ALIASES|
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_bodies_of_FUNCTIONS|
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_bodies_of_VARIABLES|
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_error_PAR|
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_function_NAMES|
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_get_ignored_VARS|
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_grep_REGEXP|
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_ignore_HARD|
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_ignore_HARDCODED|
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_ignore_READONLY|
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_ignore_RO|
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_ignore_UNDERSCORE|
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_list_alias_BODIES|
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_list_function_BODIES|
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_list_variable_VALUES|
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_make_grep_REGEXP|
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_names_of_ALIASES|
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_names_of_FUNCTIONS|
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_names_of_VARIABLES|
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_names_of_maybe_FUNCTIONS|
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_parallel_exit_CODE|
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_prefix_PARALLEL_ENV|
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_prefix_PARALLEL_ENV|
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_remove_bad_NAMES|
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_remove_readonly|
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_variable_NAMES|
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_warning_PAR|
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_which_PAR)$/x and next;
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# Filter names matching --env
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/^'"$_grep_REGEXP"'$/ or next;
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/^'"$_ignore_UNDERSCORE"'$/ and next;
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# Remove readonly variables
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/^'"$_ignore_RO"'$/ and next;
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/^'"$_ignore_HARD"'$/ and next;
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print;'
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}
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_prefix_PARALLEL_ENV() {
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shopt 2>/dev/null |
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perl -pe 's:\s+off:;: and s/^/shopt -u /;
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s:\s+on:;: and s/^/shopt -s /;
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s:;$:&>/dev/null;:';
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echo 'shopt -s expand_aliases &>/dev/null';
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}
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_get_ignored_VARS() {
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perl -e '
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for(@ARGV){
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$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, "<", "$ENV{HOME}/.parallel/ignored_vars")) {
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print STDERR "parallel: Error: ",
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"Run \"parallel --record-env\" in a clean environment first.\n";
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} else {
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chomp(@ignored_vars = <IN>);
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}
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}
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if($ENV{PARALLEL_IGNORED_NAMES}) {
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push @ignored_vars, split/\s+/, $ENV{PARALLEL_IGNORED_NAMES};
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chomp @ignored_vars;
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}
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$vars = join "|",map { quotemeta $_ } @ignored_vars;
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print $vars ? "($vars)" : "(,,nO,,VaRs,,)";
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' -- "$@"
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}
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# Get the --env variables if set
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# --env _ should be ignored
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# and convert a b c to (a|b|c)
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# If --env not set: Match everything (.*)
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_make_grep_REGEXP() {
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perl -e '
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for(@ARGV){
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/^_$/ 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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' -- "$@"
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}
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_which_PAR() {
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# type returns:
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# ll is an alias for ls -l (in ash)
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# bash is a tracked alias for /bin/bash
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# true is a shell builtin (in bash)
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# myfunc is a function (in bash)
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# myfunc is a shell function (in zsh)
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# which is /usr/bin/which (in sh, bash)
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# which is hashed (/usr/bin/which)
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# gi is aliased to `grep -i' (in bash)
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# aliased to `alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'
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# Return 0 if found, 1 otherwise
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LANG=C type "$@" |
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perl -pe '$exit += (s/ is an alias for .*// ||
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s/ is aliased to .*// ||
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s/ is a function// ||
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s/ is a shell function// ||
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s/ is a shell builtin// ||
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s/.* is hashed .(\S+).$/$1/ ||
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s/.* is (a tracked alias for )?//);
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END { exit not $exit }'
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}
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_warning_PAR() {
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echo "env_parallel: Warning: $*" >&2
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}
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_error_PAR() {
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echo "env_parallel: Error: $*" >&2
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}
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# Bash is broken in version 3.2.25 and 4.2.39
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# The crazy '[ "`...`" == "" ]' is needed for the same reason
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if [ "`_which_PAR parallel`" == "" ]; then
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# shellcheck disable=SC2016
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_error_PAR 'parallel must be in $PATH.'
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return 255
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fi
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# Grep regexp for vars given by --env
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# shellcheck disable=SC2006
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_grep_REGEXP="`_make_grep_REGEXP \"$@\"`"
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unset _make_grep_REGEXP
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# Deal with --env _
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# shellcheck disable=SC2006
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_ignore_UNDERSCORE="`_get_ignored_VARS \"$@\"`"
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unset _get_ignored_VARS
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# --record-env
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# Bash is broken in version 3.2.25 and 4.2.39
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# The crazy '[ "`...`" == 0 ]' is needed for the same reason
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if [ "`perl -e 'exit grep { /^--record-env$/ } @ARGV' -- "$@"; echo $?`" == 0 ] ; then
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true skip
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else
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(_names_of_ALIASES;
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_names_of_FUNCTIONS;
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_names_of_VARIABLES) |
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cat > "$HOME"/.parallel/ignored_vars
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return 0
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fi
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# --session
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# Bash is broken in version 3.2.25 and 4.2.39
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# The crazy '[ "`...`" == 0 ]' is needed for the same reason
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if [ "`perl -e 'exit grep { /^--session$/ } @ARGV' -- "$@"; echo $?`" == 0 ] ; then
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true skip
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else
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# Insert ::: between each level of session
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# so you can pop off the last ::: at --end-session
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# shellcheck disable=SC2006
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PARALLEL_IGNORED_NAMES="`echo \"$PARALLEL_IGNORED_NAMES\";
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echo :::;
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(_names_of_ALIASES;
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_names_of_FUNCTIONS;
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_names_of_VARIABLES) | perl -ne '
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BEGIN{
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map { $ignored_vars{$_}++ }
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split/\s+/, $ENV{PARALLEL_IGNORED_NAMES};
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}
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chomp;
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for(split/\s+/) {
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if(not $ignored_vars{$_}) {
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print $_,\"\\n\";
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}
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}
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'`"
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export PARALLEL_IGNORED_NAMES
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return 0
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fi
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# Bash is broken in version 3.2.25 and 4.2.39
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# The crazy '[ "`...`" == 0 ]' is needed for the same reason
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if [ "`perl -e 'exit grep { /^--end.?session$/ } @ARGV' -- "$@"; echo $?`" == 0 ] ; then
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true skip
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else
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# Pop off last ::: from PARALLEL_IGNORED_NAMES
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# shellcheck disable=SC2006
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PARALLEL_IGNORED_NAMES="`perl -e '
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$ENV{PARALLEL_IGNORED_NAMES} =~ s/(.*):::.*?$/$1/s;
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print $ENV{PARALLEL_IGNORED_NAMES}
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'`"
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return 0
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fi
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# Grep alias names
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# shellcheck disable=SC2006
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_alias_NAMES="`_names_of_ALIASES | _remove_bad_NAMES | xargs echo`"
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_list_alias_BODIES="_bodies_of_ALIASES $_alias_NAMES"
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if [ "$_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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# shellcheck disable=SC2006
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_function_NAMES="`_names_of_FUNCTIONS | _remove_bad_NAMES | xargs echo`"
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_list_function_BODIES="_bodies_of_FUNCTIONS $_function_NAMES"
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if [ "$_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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# shellcheck disable=SC2006
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_variable_NAMES="`_names_of_VARIABLES | _remove_bad_NAMES | xargs echo`"
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_list_variable_VALUES="_bodies_of_VARIABLES $_variable_NAMES"
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if [ "$_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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_which_TRUE="`_which_PAR true`"
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# Copy shopt (so e.g. extended globbing works)
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# But force expand_aliases as aliases otherwise do not work
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PARALLEL_ENV="`
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_prefix_PARALLEL_ENV
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$_list_alias_BODIES;
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$_list_function_BODIES;
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$_list_variable_VALUES;
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`"
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export PARALLEL_ENV
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unset _list_alias_BODIES _list_variable_VALUES _list_function_BODIES
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unset _bodies_of_ALIASES _bodies_of_VARIABLES _bodies_of_FUNCTIONS
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unset _names_of_ALIASES _names_of_VARIABLES _names_of_FUNCTIONS
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unset _ignore_HARDCODED _ignore_READONLY _ignore_UNDERSCORE
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unset _remove_bad_NAMES _grep_REGEXP
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unset _prefix_PARALLEL_ENV
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# Test if environment is too big
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if [ "`_which_PAR true`" == "$_which_TRUE" ] ; then
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parallel "$@"
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_parallel_exit_CODE=$?
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# Clean up variables/functions
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unset PARALLEL_ENV
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unset _which_PAR _which_TRUE
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unset _warning_PAR _error_PAR
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# Unset _parallel_exit_CODE before return
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eval "unset _parallel_exit_CODE; return $_parallel_exit_CODE"
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else
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unset PARALLEL_ENV;
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_error_PAR "Your environment is too big."
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_error_PAR "You can try 3 different approaches:"
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_error_PAR "1. Run 'env_parallel --session' before you set"
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_error_PAR " variables or define functions."
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_error_PAR "2. Use --env and only mention the names to copy."
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_error_PAR "3. Try running this in a clean environment once:"
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_error_PAR " env_parallel --record-env"
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_error_PAR " And then use '--env _'"
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_error_PAR "For details see: man env_parallel"
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return 255
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fi
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}
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parset() {
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_parset_PARALLEL_PRG=parallel
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_parset_main "$@"
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}
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env_parset() {
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_parset_PARALLEL_PRG=env_parallel
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_parset_main "$@"
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}
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_parset_main() {
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# If $1 contains ',' or space:
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# Split on , to get the destination variable names
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# If $1 is a single destination variable name:
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# Treat it as the name of an array
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#
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# # Create array named myvar
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# parset myvar echo ::: {1..10}
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# echo ${myvar[5]}
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#
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# # Put output into $var_a $var_b $var_c
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# varnames=(var_a var_b var_c)
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# parset "${varnames[*]}" echo ::: {1..3}
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# echo $var_c
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#
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# # Put output into $var_a4 $var_b4 $var_c4
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# parset "var_a4 var_b4 var_c4" echo ::: {1..3}
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# echo $var_c4
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_parset_NAME="$1"
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if [ "$_parset_NAME" = "" ] ; then
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echo parset: Error: No destination variable given. >&2
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echo parset: Error: Try: >&2
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echo parset: Error: ' ' parset myarray echo ::: foo bar >&2
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return 255
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fi
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if [ "$_parset_NAME" = "--help" ] ; then
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echo parset: Error: Usage: >&2
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echo parset: Error: ' ' parset varname GNU Parallel options and command >&2
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echo
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parallel --help
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return 255
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fi
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if [ "$_parset_NAME" = "--version" ] ; then
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# shellcheck disable=SC2006
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echo "parset 20230222 (GNU parallel `parallel --minversion 1`)"
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echo "Copyright (C) 2007-2023 Ole Tange, http://ole.tange.dk and Free Software"
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echo "Foundation, Inc."
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echo "License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>"
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echo "This is free software: you are free to change and redistribute it."
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echo "GNU parallel comes with no warranty."
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echo
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echo "Web site: https://www.gnu.org/software/parallel"
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echo
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echo "When using programs that use GNU Parallel to process data for publication"
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echo "please cite as described in 'parallel --citation'."
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echo
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return 255
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fi
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shift
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# Bash: declare -A myassoc=( )
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# Zsh: typeset -A myassoc=( )
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# Ksh: typeset -A myassoc=( )
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# shellcheck disable=SC2039,SC2169
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if (typeset -p "$_parset_NAME" 2>/dev/null; echo) |
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perl -ne 'exit not (/^declare[^=]+-A|^typeset[^=]+-A/)' ; then
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# This is an associative array
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# shellcheck disable=SC2006
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eval "`$_parset_PARALLEL_PRG -k --_parset assoc,"$_parset_NAME" "$@"`"
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# The eval returns the function!
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else
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# This is a normal array or a list of variable names
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# shellcheck disable=SC2006
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eval "`$_parset_PARALLEL_PRG -k --_parset var,"$_parset_NAME" "$@"`"
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# The eval returns the function!
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fi
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}
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