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#!/usr/bin/env zsh
# This file must be sourced in sh/ash/dash/bash/ksh/mksh/zsh:
#
# . env_parallel.sh
# source env_parallel.ash
# source env_parallel.dash
# source env_parallel.bash
# source env_parallel.ksh
# source env_parallel.mksh
# source env_parallel.zsh
#
# after which 'env_parallel' works
#
#
# Copyright (C) 2016-2024 Ole Tange, http://ole.tange.dk 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 <http://www.gnu.org/licenses/>
# or write to the Free Software Foundation, Inc., 51 Franklin St,
# Fifth Floor, Boston, MA 02110-1301 USA
#
# SPDX-FileCopyrightText: 2021-2024 Ole Tange, http://ole.tange.dk and Free Software and Foundation, Inc.
# SPDX-License-Identifier: GPL-3.0-or-later
# shellcheck disable=SC2006
env_parallel() {
# env_parallel.{sh,ash,dash,bash,ksh,mksh,zsh}
# Check shell dialect
if [ -n "$BASH_VERSION" ]; then
_shell_DIALECT=bash
_eval_needed=false
_prefix_PARALLEL_ENV=_prefix_PARALLEL_ENV_bash
elif [ -n "$ZSH_VERSION" ]; then
_shell_DIALECT=zsh
_eval_needed=true
_prefix_PARALLEL_ENV=false
elif [ -n "$KSH_VERSION" ]; then
_shell_DIALECT=ksh
_eval_needed=false
_prefix_PARALLEL_ENV=false
else
# Dash/ash - can these be detected better?
_shell_DIALECT="sh"
_eval_needed=false
_prefix_PARALLEL_ENV=false
fi
_names_of_ALIASES() {
_names_of_ALIASES_$_shell_DIALECT
}
_names_of_ALIASES_sh() {
# alias fails on Unixware 5
for _i in `alias 2>/dev/null | perl -ne 's/^alias //;s/^(\S+)=.*/$1/ && print' 2>/dev/null`; do
# Check if this name really is an alias
# or just part of a multiline alias definition
if alias "$_i" >/dev/null 2>/dev/null; then
echo "$_i"
fi
done
}
_names_of_ALIASES_bash() {
# No aliases will return false. This error should be ignored.
# shellcheck disable=SC3044
compgen -a || true
}
_names_of_ALIASES_ksh() {
alias | perl -pe 's/=.*//'
}
_names_of_ALIASES_zsh() {
# shellcheck disable=SC2086,SC2296
print -l ${(k)aliases}
}
_bodies_of_ALIASES() {
_bodies_of_ALIASES_$_shell_DIALECT "$@"
}
_bodies_of_ALIASES_sh() {
# alias may return:
# myalias='definition' (GNU/Linux ash)
# alias myalias='definition' (FreeBSD ash)
# so remove 'alias ' from first line
for _i in "$@"; do
echo 'alias '"`alias "$_i" | perl -pe '1..1 and s/^alias //'`"
done
}
_bodies_of_ALIASES_bash() {
# shellcheck disable=SC3043
local _i
for _i in "$@"; do
# shellcheck disable=SC2046
if [ $(alias "$_i" | wc -l) = 1 ] ; then
true Alias is a single line. Good.
else
_warning_PAR "Alias '$_i' contains newline."
_warning_PAR "Make sure the command has at least one newline after '$_i'."
_warning_PAR "See BUGS in 'man env_parallel'."
fi
done
alias "$@"
}
_bodies_of_ALIASES_ksh() {
alias "$@" | perl -pe 's/^/alias /;
sub warning { print STDERR "env_parallel: Warning: @_\n"; }
if(/^alias (\S+)=\$.*\\n/) {
warning("Alias \"$1\" contains newline.");
warning("Make sure the command has at least one newline after \"$1\".");
warning("See BUGS in \"man env_parallel\".");
}'
}
_bodies_of_ALIASES_zsh() {
# shellcheck disable=SC3043
local _i
for _i in "$@"; do
echo 'alias '"$(alias "$_i")"
done
}
_names_of_FUNCTIONS() {
_names_of_FUNCTIONS_$_shell_DIALECT
}
_names_of_FUNCTIONS_bash() {
# shellcheck disable=SC3044
compgen -A function
}
_names_of_maybe_FUNCTIONS() {
set | perl -ne '/^([A-Z_0-9]+)\s*\(\)\s*\{?$/i and print "$1\n"'
}
_names_of_FUNCTIONS_sh() {
# myfunc is a function
# shellcheck disable=SC2046
LANG=C type `_names_of_maybe_FUNCTIONS` |
perl -ne '/^(\S+) is a function$/ and not $seen{$1}++ and print "$1\n"'
}
_names_of_FUNCTIONS_ksh() {
# shellcheck disable=SC3044
typeset +f | perl -pe 's/\(\).*//; s/ .*//;'
}
_names_of_FUNCTIONS_zsh() {
# shellcheck disable=SC2086,SC2296
print -l ${(k)functions}
}
_bodies_of_FUNCTIONS() {
_bodies_of_FUNCTIONS_$_shell_DIALECT "$@"
}
_bodies_of_FUNCTIONS_sh() {
LANG=C type "$@" | perl -ne '/^(\S+) is a function$/ or print'
}
_bodies_of_FUNCTIONS_bash() {
# shellcheck disable=SC3044
typeset -f "$@"
}
_bodies_of_FUNCTIONS_ksh() {
functions "$@"
}
_bodies_of_FUNCTIONS_zsh() {
# shellcheck disable=SC3044
typeset -f "$@"
}
_names_of_VARIABLES() {
_names_of_VARIABLES_$_shell_DIALECT
}
_names_of_VARIABLES_sh() {
# This may screw up if variables contain \n and =
set | perl -ne 's/^(\S+?)=.*/$1/ and print;'
}
_names_of_VARIABLES_bash() {
# shellcheck disable=SC3044
compgen -A variable
}
_names_of_VARIABLES_ksh() {
# shellcheck disable=SC3044
typeset +p |
perl -pe 's/^(type)?set( [-+][a-zA-Z0-9]*)* //; s/(\[\d+\])?=.*//' |
uniq
}
_names_of_VARIABLES_zsh() {
# shellcheck disable=SC2086,SC2296
print -l ${(k)parameters}
}
_bodies_of_VARIABLES() {
_bodies_of_VARIABLES_$_shell_DIALECT "$@"
}
_bodies_of_VARIABLES_sh() {
# Crappy typeset -p
for _i in "$@"
do
perl -e 'print @ARGV' "$_i="
eval echo "\"\$$_i\"" | perl -e '$/=undef; $a=<>; chop($a); print $a' |
perl -pe 's/[\002-\011\013-\032\\\#\?\`\(\)\{\}\[\]\^\*\<\=\>\~\|\; \"\!\$\&\202-\377]/\\$&/go;'"s/'/\\\'/g; s/[\n]/'\\n'/go;";
echo
done
}
_bodies_of_VARIABLES_bash() {
# shellcheck disable=SC3044
typeset -p "$@"
}
_bodies_of_VARIABLES_ksh() {
# shellcheck disable=SC3044
typeset -p "$@"
}
_bodies_of_VARIABLES_zsh() {
# shellcheck disable=SC3044
typeset -p "$@"
}
_ignore_HARDCODED() {
_ignore_HARDCODED_$_shell_DIALECT
}
_ignore_HARDCODED_sh() {
# These names cannot be detected
echo '(_|TIMEOUT|IFS)'
}
_ignore_HARDCODED_bash() {
# Copying $RANDOM will cause it not to be random
# The rest cannot be detected as read-only
echo '(RANDOM|_|TIMEOUT|GROUPS|FUNCNAME|DIRSTACK|PIPESTATUS|USERNAME|BASHPID|BASH_[A-Z_]+)'
}
_ignore_HARDCODED_ksh() {
# These names cannot be detected
echo '(_|TIMEOUT|IFS)'
}
_ignore_HARDCODED_zsh() {
# These names cannot be detected
echo '([-\?\#\!\$\*\@\_0]|zsh_eval_context|ZSH_EVAL_CONTEXT|LINENO|IFS|commands|functions|options|aliases|EUID|EGID|UID|GID|dis_patchars|patchars|terminfo|galiases|keymaps|parameters|jobdirs|dirstack|functrace|funcsourcetrace|zsh_scheduled_events|dis_aliases|dis_reswords|dis_saliases|modules|reswords|saliases|widgets|userdirs|historywords|nameddirs|termcap|dis_builtins|dis_functions|jobtexts|funcfiletrace|dis_galiases|builtins|history|jobstates|funcstack|run-help)'
}
_ignore_READONLY() {
_ignore_READONLY_$_shell_DIALECT
}
_parse_READONLY() {
# shellcheck disable=SC1078,SC1079,SC2026
perl -e '@r = map {
chomp;
# sh on UnixWare: readonly TIMEOUT
# ash: readonly var='val'
# ksh: var='val'
# mksh: PIPESTATUS[0]
s/^(readonly )?([^=\[ ]*?)(\[\d+\])?(=.*|)$/$2/ or
# bash: declare -ar BASH_VERSINFO=([0]="4" [1]="4")
# zsh: typeset -r var='val'
s/^\S+\s+\S+\s+(\S[^=]*)(=.*|$)/$1/;
$_ } <>;
$vars = join "|",map { quotemeta $_ } @r;
print $vars ? "($vars)" : "(,,nO,,VaRs,,)";
'
}
_ignore_READONLY_sh() {
readonly | _parse_READONLY
}
_ignore_READONLY_bash() {
readonly | _parse_READONLY
}
_ignore_READONLY_ksh() {
readonly | _parse_READONLY
}
_ignore_READONLY_zsh() {
# shellcheck disable=SC3044
typeset -pr | _parse_READONLY
}
_remove_bad_NAMES() {
# Do not transfer vars and funcs from env_parallel
# shellcheck disable=SC2006
_ignore_RO="`_ignore_READONLY`"
# shellcheck disable=SC2006
_ignore_HARD="`_ignore_HARDCODED`"
# To avoid depending on grep dialect, use Perl version of:
# grep -Ev '^(...)$' |
perl -ne '/^(
PARALLEL_ENV|
PARALLEL_TMP|
_alias_NAMES|
_bodies_of_ALIASES|
_bodies_of_FUNCTIONS|
_bodies_of_VARIABLES|
_error_PAR|
_function_NAMES|
_get_ignored_VARS|
_grep_REGEXP|
_ignore_HARD|
_ignore_HARDCODED|
_ignore_READONLY|
_ignore_RO|
_ignore_UNDERSCORE|
_list_alias_BODIES|
_list_function_BODIES|
_list_variable_VALUES|
_make_grep_REGEXP|
_names_of_ALIASES|
_names_of_FUNCTIONS|
_names_of_VARIABLES|
_names_of_maybe_FUNCTIONS|
_parallel_exit_CODE|
_prefix_PARALLEL_ENV|
_prefix_PARALLEL_ENV_bash|
_remove_bad_NAMES|
_remove_readonly|
_variable_NAMES|
_warning_PAR|
_which_PAR)$/x and next;
# Filter names matching --env
/^'"$_grep_REGEXP"'$/ or next;
/^'"$_ignore_UNDERSCORE"'$/ and next;
# Remove readonly variables
/^'"$_ignore_RO"'$/ and next;
/^'"$_ignore_HARD"'$/ and next;
print;'
}
_prefix_PARALLEL_ENV_bash() {
# shellcheck disable=SC3044
shopt 2>/dev/null |
perl -pe 's:\s+off:;: and s/^/shopt -u /;
s:\s+on:;: and s/^/shopt -s /;
s:;$:&>/dev/null;:';
echo 'shopt -s expand_aliases &>/dev/null';
}
_get_ignored_VARS() {
perl -e '
for(@ARGV){
$next_is_env and push @envvar, split/,/, $_;
$next_is_env=/^--env$/;
}
if(grep { /^_$/ } @envvar) {
if(not open(IN, "<", "$ENV{HOME}/.parallel/ignored_vars")) {
print STDERR "parallel: Error: ",
"Run \"parallel --record-env\" in a clean environment first.\n";
} else {
chomp(@ignored_vars = <IN>);
}
}
if($ENV{PARALLEL_IGNORED_NAMES}) {
push @ignored_vars, split/\s+/, $ENV{PARALLEL_IGNORED_NAMES};
chomp @ignored_vars;
}
$vars = join "|",map { quotemeta $_ } @ignored_vars;
print $vars ? "($vars)" : "(,,nO,,VaRs,,)";
' -- "$@"
}
# Get the --env variables if set
# --env _ should be ignored
# and convert a b c to (a|b|c)
# If --env not set: Match everything (.*)
_make_grep_REGEXP() {
perl -e '
for(@ARGV){
/^_$/ and $next_is_env = 0;
$next_is_env and push @envvar, split/,/, $_;
$next_is_env = /^--env$/;
}
$vars = join "|",map { quotemeta $_ } @envvar;
print $vars ? "($vars)" : "(.*)";
' -- "$@"
}
_which_PAR() {
# type returns:
# ll is an alias for ls -l (in ash)
# bash is a tracked alias for /bin/bash
# true is a shell builtin (in bash)
# myfunc is a function (in bash)
# myfunc is a shell function (in zsh)
# which is /usr/bin/which (in sh, bash)
# which is hashed (/usr/bin/which)
# gi is aliased to `grep -i' (in bash)
# aliased to `alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'
# Return 0 if found, 1 otherwise
LANG=C type "$@" |
perl -pe '$exit += (s/ is an alias for .*// ||
s/ is aliased to .*// ||
s/ is a function// ||
s/ is a shell function// ||
s/ is a shell builtin// ||
s/.* is hashed .(\S+).$/$1/ ||
s/.* is (a tracked alias for )?//);
END { exit not $exit }'
}
_warning_PAR() {
echo "env_parallel: Warning: $*" >&2
}
_error_PAR() {
echo "env_parallel: Error: $*" >&2
}
if _which_PAR parallel >/dev/null; then
true parallel found in path
else
# shellcheck disable=SC2016
_error_PAR 'parallel must be in $PATH.'
return 255
fi
# Grep regexp for vars given by --env
# shellcheck disable=SC2006
_grep_REGEXP="`_make_grep_REGEXP \"$@\"`"
unset _make_grep_REGEXP
# Deal with --env _
# shellcheck disable=SC2006
_ignore_UNDERSCORE="`_get_ignored_VARS \"$@\"`"
unset _get_ignored_VARS
# --record-env
if perl -e 'exit grep { /^--record-env$/ } @ARGV' -- "$@"; then
true skip
else
(_names_of_ALIASES;
_names_of_FUNCTIONS;
_names_of_VARIABLES) |
cat > "$HOME"/.parallel/ignored_vars
return 0
fi
# --session
if perl -e 'exit grep { /^--session$/ } @ARGV' -- "$@"; then
true skip
else
# Insert ::: between each level of session
# so you can pop off the last ::: at --end-session
# shellcheck disable=SC2006
PARALLEL_IGNORED_NAMES="`echo \"$PARALLEL_IGNORED_NAMES\";
echo :::;
(_names_of_ALIASES;
_names_of_FUNCTIONS;
_names_of_VARIABLES) | perl -ne '
BEGIN{
map { $ignored_vars{$_}++ }
split/\s+/, $ENV{PARALLEL_IGNORED_NAMES};
}
chomp;
for(split/\s+/) {
if(not $ignored_vars{$_}) {
print $_,\"\\n\";
}
}
'`"
export PARALLEL_IGNORED_NAMES
return 0
fi
if perl -e 'exit grep { /^--end.?session$/ } @ARGV' -- "$@"; then
true skip
else
# Pop off last ::: from PARALLEL_IGNORED_NAMES
# shellcheck disable=SC2006
PARALLEL_IGNORED_NAMES="`perl -e '
$ENV{PARALLEL_IGNORED_NAMES} =~ s/(.*):::.*?$/$1/s;
print $ENV{PARALLEL_IGNORED_NAMES}
'`"
return 0
fi
# Grep alias names
# shellcheck disable=SC2006
_alias_NAMES="`_names_of_ALIASES | _remove_bad_NAMES | xargs echo`"
_list_alias_BODIES="_bodies_of_ALIASES $_alias_NAMES"
if [ "$_alias_NAMES" = "" ] ; then
# no aliases selected
_list_alias_BODIES="true"
fi
unset _alias_NAMES
# Grep function names
# shellcheck disable=SC2006
_function_NAMES="`_names_of_FUNCTIONS | _remove_bad_NAMES | xargs echo`"
_list_function_BODIES="_bodies_of_FUNCTIONS $_function_NAMES"
if [ "$_function_NAMES" = "" ] ; then
# no functions selected
_list_function_BODIES="true"
fi
unset _function_NAMES
# Grep variable names
# shellcheck disable=SC2006
_variable_NAMES="`_names_of_VARIABLES | _remove_bad_NAMES | xargs echo`"
_list_variable_VALUES="_bodies_of_VARIABLES $_variable_NAMES"
if [ "$_variable_NAMES" = "" ] ; then
# no variables selected
_list_variable_VALUES="true"
fi
unset _variable_NAMES
if $_eval_needed ; then
# shellcheck disable=SC2006
PARALLEL_ENV="`
eval $_prefix_PARALLEL_ENV;
eval $_list_alias_BODIES;
eval $_list_function_BODIES;
eval $_list_variable_VALUES;
`"
else
# shellcheck disable=SC2006
PARALLEL_ENV="`
$_prefix_PARALLEL_ENV;
$_list_alias_BODIES;
$_list_function_BODIES;
$_list_variable_VALUES;
`"
fi
export PARALLEL_ENV
# Free up some env space
unset _list_alias_BODIES _list_variable_VALUES _list_function_BODIES
unset _bodies_of_ALIASES _bodies_of_VARIABLES _bodies_of_FUNCTIONS
unset _names_of_ALIASES _names_of_VARIABLES _names_of_FUNCTIONS
unset _ignore_HARDCODED _ignore_READONLY _ignore_UNDERSCORE
unset _remove_bad_NAMES _grep_REGEXP _parse_READONLY
unset _prefix_PARALLEL_ENV
unset _ignore_READONLY_sh _ignore_READONLY_bash
unset _ignore_READONLY_ksh _ignore_READONLY_zsh
unset _ignore_HARDCODED_sh _ignore_HARDCODED_bash
unset _ignore_HARDCODED_ksh _ignore_HARDCODED_zsh
unset _bodies_of_ALIASES_ksh _bodies_of_ALIASES_sh
unset _bodies_of_ALIASES_zsh _bodies_of_FUNCTIONS_bash
unset _bodies_of_FUNCTIONS_ksh _bodies_of_FUNCTIONS_sh
unset _bodies_of_FUNCTIONS_zsh _bodies_of_VARIABLES_bash
unset _bodies_of_VARIABLES_ksh _bodies_of_VARIABLES_sh
unset _bodies_of_VARIABLES_zsh
unset _names_of_ALIASES _names_of_ALIASES_bash
unset _names_of_ALIASES_ksh _names_of_ALIASES_sh
unset _names_of_ALIASES_zsh _names_of_FUNCTIONS
unset _names_of_FUNCTIONS_bash _names_of_FUNCTIONS_ksh
unset _names_of_FUNCTIONS_sh _names_of_FUNCTIONS_zsh
unset _names_of_VARIABLES _names_of_VARIABLES_bash
unset _names_of_VARIABLES_ksh _names_of_VARIABLES_sh
unset _names_of_VARIABLES_zsh _names_of_maybe_FUNCTIONS
# Test if environment is too big by running 'true'
# shellcheck disable=SC2006,SC2092
if `_which_PAR true` >/dev/null 2>/dev/null ; then
parallel "$@"
_parallel_exit_CODE=$?
# Clean up variables/functions
unset PARALLEL_ENV
unset _which_PAR _which_TRUE
unset _warning_PAR _error_PAR
# Unset _parallel_exit_CODE before return
eval "unset _parallel_exit_CODE; return $_parallel_exit_CODE"
else
unset PARALLEL_ENV;
_error_PAR "Your environment is too big."
_error_PAR "You can try 3 different approaches:"
_error_PAR "1. Run 'env_parallel --session' before you set"
_error_PAR " variables or define functions."
_error_PAR "2. Use --env and only mention the names to copy."
_error_PAR "3. Try running this in a clean environment once:"
_error_PAR " env_parallel --record-env"
_error_PAR " And then use '--env _'"
_error_PAR "For details see: man env_parallel"
return 255
fi
}
parset() {
_parset_PARALLEL_PRG=parallel
_parset_main "$@"
}
env_parset() {
_parset_PARALLEL_PRG=env_parallel
_parset_main "$@"
}
_parset_main() {
# If $1 contains ',' or space:
# Split on , to get the destination variable names
# If $1 is a single destination variable name:
# Treat it as the name of an array
#
# # Create array named myvar
# parset myvar echo ::: {1..10}
# echo ${myvar[5]}
#
# # Put output into $var_a $var_b $var_c
# varnames=(var_a var_b var_c)
# parset "${varnames[*]}" echo ::: {1..3}
# echo $var_c
#
# # Put output into $var_a4 $var_b4 $var_c4
# parset "var_a4 var_b4 var_c4" echo ::: {1..3}
# echo $var_c4
_parset_NAME="$1"
if [ "$_parset_NAME" = "" ] ; then
echo parset: Error: No destination variable given. >&2
echo parset: Error: Try: >&2
echo parset: Error: ' ' parset myarray echo ::: foo bar >&2
return 255
fi
if [ "$_parset_NAME" = "--help" ] ; then
echo parset: Error: Usage: >&2
echo parset: Error: ' ' parset varname GNU Parallel options and command >&2
echo
parallel --help
return 255
fi
if [ "$_parset_NAME" = "--version" ] ; then
# shellcheck disable=SC2006
echo "parset 20240222 (GNU parallel `parallel --minversion 1`)"
echo "Copyright (C) 2007-2024 Ole Tange, http://ole.tange.dk and Free Software"
echo "Foundation, Inc."
echo "License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>"
echo "This is free software: you are free to change and redistribute it."
echo "GNU parallel comes with no warranty."
echo
echo "Web site: https://www.gnu.org/software/parallel"
echo
echo "When using programs that use GNU Parallel to process data for publication"
echo "please cite as described in the manpage."
echo
return 255
fi
shift
# Bash: declare -A myassoc=( )
# Zsh: typeset -A myassoc=( )
# Ksh: typeset -A myassoc=( )
# shellcheck disable=SC2039,SC2169,SC3044
if (typeset -p "$_parset_NAME" 2>/dev/null; echo) |
perl -ne 'exit not (/^declare[^=]+-A|^typeset[^=]+-A/)' ; then
# This is an associative array
# shellcheck disable=SC2006
eval "`$_parset_PARALLEL_PRG -k --_parset assoc,"$_parset_NAME" "$@"`"
# The eval returns the function!
else
# This is a normal array or a list of variable names
# shellcheck disable=SC2006
eval "`$_parset_PARALLEL_PRG -k --_parset var,"$_parset_NAME" "$@"`"
# The eval returns the function!
fi
}
|