1#!/usr/bin/env dash 2 3# This file must be sourced in dash: 4# 5# . `which env_parallel.dash` 6# 7# after which 'env_parallel' works 8# 9# 10# Copyright (C) 2016-2021 Ole Tange, http://ole.tange.dk and Free 11# Software Foundation, Inc. 12# 13# This program is free software; you can redistribute it and/or modify 14# it under the terms of the GNU General Public License as published by 15# the Free Software Foundation; either version 3 of the License, or 16# (at your option) any later version. 17# 18# This program is distributed in the hope that it will be useful, but 19# WITHOUT ANY WARRANTY; without even the implied warranty of 20# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21# General Public License for more details. 22# 23# You should have received a copy of the GNU General Public License 24# along with this program; if not, see <http://www.gnu.org/licenses/> 25# or write to the Free Software Foundation, Inc., 51 Franklin St, 26# Fifth Floor, Boston, MA 02110-1301 USA 27# 28# SPDX-FileCopyrightText: 2021 Ole Tange, http://ole.tange.dk and Free Software and Foundation, Inc. 29# SPDX-License-Identifier: GPL-3.0-or-later 30 31env_parallel() { 32 # based on env_parallel.sh 33 34 _names_of_ALIASES() { 35 # alias fails on Unixware 5 36 for _i in `alias 2>/dev/null | perl -ne 's/^alias //;s/^(\S+)=.*/$1/ && print' 2>/dev/null`; do 37 # Check if this name really is an alias 38 # or just part of a multiline alias definition 39 if alias $_i >/dev/null 2>/dev/null; then 40 echo $_i 41 fi 42 done 43 } 44 _bodies_of_ALIASES() { 45 # alias may return: 46 # myalias='definition' (GNU/Linux ash) 47 # alias myalias='definition' (FreeBSD ash) 48 # so remove 'alias ' from first line 49 for _i in "$@"; do 50 echo 'alias '"`alias $_i | perl -pe '1..1 and s/^alias //'`" 51 done 52 } 53 _names_of_maybe_FUNCTIONS() { 54 set | perl -ne '/^([A-Z_0-9]+)\s*\(\)\s*\{?$/i and print "$1\n"' 55 } 56 _names_of_FUNCTIONS() { 57 # myfunc is a function 58 LANG=C type `_names_of_maybe_FUNCTIONS` | 59 perl -ne '/^(\S+) is a function$/ and not $seen{$1}++ and print "$1\n"' 60 } 61 _bodies_of_FUNCTIONS() { 62 LANG=C type "$@" | perl -ne '/^(\S+) is a function$/ or print' 63 } 64 _names_of_VARIABLES() { 65 # This may screw up if variables contain \n and = 66 set | perl -ne 's/^(\S+?)=.*/$1/ and print;' 67 } 68 _bodies_of_VARIABLES() { 69 # Crappy typeset -p 70 for _i in "$@" 71 do 72 perl -e 'print @ARGV' "$_i=" 73 eval echo \"\$$_i\" | perl -e '$/=undef; $a=<>; chop($a); print $a' | 74 perl -pe 's/[\002-\011\013-\032\\\#\?\`\(\)\{\}\[\]\^\*\<\=\>\~\|\; \"\!\$\&\202-\377]/\\$&/go;'"s/'/\\\'/g; s/[\n]/'\\n'/go;"; 75 echo 76 done 77 } 78 _ignore_HARDCODED() { 79 # These names cannot be detected 80 echo '(_|TIMEOUT)' 81 } 82 _ignore_READONLY() { 83 readonly | perl -e '@r = map { 84 chomp; 85 # sh on UnixWare: readonly TIMEOUT 86 # ash: readonly var='val' 87 # ksh: var='val' 88 s/^(readonly )?([^= ]*)(=.*|)$/$2/ or 89 # bash: declare -ar BASH_VERSINFO=([0]="4" [1]="4") 90 # zsh: typeset -r var='val' 91 s/^\S+\s+\S+\s+(\S[^=]*)(=.*|$)/$1/; 92 $_ } <>; 93 $vars = join "|",map { quotemeta $_ } @r; 94 print $vars ? "($vars)" : "(,,nO,,VaRs,,)"; 95 ' 96 } 97 _remove_bad_NAMES() { 98 # Do not transfer vars and funcs from env_parallel 99 _ignore_RO="`_ignore_READONLY`" 100 _ignore_HARD="`_ignore_HARDCODED`" 101 # Macos-grep does not like long patterns 102 # Old Solaris grep does not support -E 103 # Perl Version of: 104 # grep -Ev '^(...)$' | 105 perl -ne '/^( 106 PARALLEL_ENV| 107 PARALLEL_TMP| 108 _alias_NAMES| 109 _bodies_of_ALIASES| 110 _bodies_of_FUNCTIONS| 111 _bodies_of_VARIABLES| 112 _error_PAR| 113 _function_NAMES| 114 _get_ignored_VARS| 115 _grep_REGEXP| 116 _ignore_HARD| 117 _ignore_HARDCODED| 118 _ignore_READONLY| 119 _ignore_RO| 120 _ignore_UNDERSCORE| 121 _list_alias_BODIES| 122 _list_function_BODIES| 123 _list_variable_VALUES| 124 _make_grep_REGEXP| 125 _names_of_ALIASES| 126 _names_of_FUNCTIONS| 127 _names_of_VARIABLES| 128 _names_of_maybe_FUNCTIONS| 129 _parallel_exit_CODE| 130 _prefix_PARALLEL_ENV| 131 _prefix_PARALLEL_ENV| 132 _remove_bad_NAMES| 133 _remove_readonly| 134 _variable_NAMES| 135 _warning_PAR| 136 _which_PAR)$/x and next; 137 # Filter names matching --env 138 /^'"$_grep_REGEXP"'$/ or next; 139 /^'"$_ignore_UNDERSCORE"'$/ and next; 140 # Remove readonly variables 141 /^'"$_ignore_RO"'$/ and next; 142 /^'"$_ignore_HARD"'$/ and next; 143 print;' 144 } 145 _get_ignored_VARS() { 146 perl -e ' 147 for(@ARGV){ 148 $next_is_env and push @envvar, split/,/, $_; 149 $next_is_env=/^--env$/; 150 } 151 if(grep { /^_$/ } @envvar) { 152 if(not open(IN, "<", "$ENV{HOME}/.parallel/ignored_vars")) { 153 print STDERR "parallel: Error: ", 154 "Run \"parallel --record-env\" in a clean environment first.\n"; 155 } else { 156 chomp(@ignored_vars = <IN>); 157 } 158 } 159 if($ENV{PARALLEL_IGNORED_NAMES}) { 160 push @ignored_vars, split/\s+/, $ENV{PARALLEL_IGNORED_NAMES}; 161 chomp @ignored_vars; 162 } 163 $vars = join "|",map { quotemeta $_ } @ignored_vars; 164 print $vars ? "($vars)" : "(,,nO,,VaRs,,)"; 165 ' -- "$@" 166 } 167 168 # Get the --env variables if set 169 # --env _ should be ignored 170 # and convert a b c to (a|b|c) 171 # If --env not set: Match everything (.*) 172 _make_grep_REGEXP() { 173 perl -e ' 174 for(@ARGV){ 175 /^_$/ and $next_is_env = 0; 176 $next_is_env and push @envvar, split/,/, $_; 177 $next_is_env = /^--env$/; 178 } 179 $vars = join "|",map { quotemeta $_ } @envvar; 180 print $vars ? "($vars)" : "(.*)"; 181 ' -- "$@" 182 } 183 _which_PAR() { 184 # type returns: 185 # ll is an alias for ls -l (in ash) 186 # bash is a tracked alias for /bin/bash 187 # true is a shell builtin (in bash) 188 # myfunc is a function (in bash) 189 # myfunc is a shell function (in zsh) 190 # which is /usr/bin/which (in sh, bash) 191 # which is hashed (/usr/bin/which) 192 # gi is aliased to `grep -i' (in bash) 193 # aliased to `alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde' 194 # Return 0 if found, 1 otherwise 195 LANG=C type "$@" | 196 perl -pe '$exit += (s/ is an alias for .*// || 197 s/ is aliased to .*// || 198 s/ is a function// || 199 s/ is a shell function// || 200 s/ is a shell builtin// || 201 s/.* is hashed .(\S+).$/$1/ || 202 s/.* is (a tracked alias for )?//); 203 END { exit not $exit }' 204 } 205 _warning_PAR() { 206 echo "env_parallel: Warning: $@" >&2 207 } 208 _error_PAR() { 209 echo "env_parallel: Error: $@" >&2 210 } 211 212 if _which_PAR parallel >/dev/null; then 213 true parallel found in path 214 else 215 _error_PAR 'parallel must be in $PATH.' 216 return 255 217 fi 218 219 # Grep regexp for vars given by --env 220 _grep_REGEXP="`_make_grep_REGEXP \"$@\"`" 221 unset _make_grep_REGEXP 222 223 # Deal with --env _ 224 _ignore_UNDERSCORE="`_get_ignored_VARS \"$@\"`" 225 unset _get_ignored_VARS 226 227 # --record-env 228 if perl -e 'exit grep { /^--record-env$/ } @ARGV' -- "$@"; then 229 true skip 230 else 231 (_names_of_ALIASES; 232 _names_of_FUNCTIONS; 233 _names_of_VARIABLES) | 234 cat > $HOME/.parallel/ignored_vars 235 return 0 236 fi 237 238 # --session 239 if perl -e 'exit grep { /^--session$/ } @ARGV' -- "$@"; then 240 true skip 241 else 242 # Insert ::: between each level of session 243 # so you can pop off the last ::: at --end-session 244 PARALLEL_IGNORED_NAMES="`echo \"$PARALLEL_IGNORED_NAMES\"; 245 echo :::; 246 (_names_of_ALIASES; 247 _names_of_FUNCTIONS; 248 _names_of_VARIABLES) | perl -ne ' 249 BEGIN{ 250 map { $ignored_vars{$_}++ } 251 split/\s+/, $ENV{PARALLEL_IGNORED_NAMES}; 252 } 253 chomp; 254 for(split/\s+/) { 255 if(not $ignored_vars{$_}) { 256 print $_,\"\\n\"; 257 } 258 } 259 '`" 260 export PARALLEL_IGNORED_NAMES 261 return 0 262 fi 263 if perl -e 'exit grep { /^--end.?session$/ } @ARGV' -- "$@"; then 264 true skip 265 else 266 # Pop off last ::: from PARALLEL_IGNORED_NAMES 267 PARALLEL_IGNORED_NAMES="`perl -e ' 268 $ENV{PARALLEL_IGNORED_NAMES} =~ s/(.*):::.*?$/$1/s; 269 print $ENV{PARALLEL_IGNORED_NAMES} 270 '`" 271 return 0 272 fi 273 # Grep alias names 274 _alias_NAMES="`_names_of_ALIASES | _remove_bad_NAMES | xargs echo`" 275 _list_alias_BODIES="_bodies_of_ALIASES $_alias_NAMES" 276 if [ "$_alias_NAMES" = "" ] ; then 277 # no aliases selected 278 _list_alias_BODIES="true" 279 fi 280 unset _alias_NAMES 281 282 # Grep function names 283 _function_NAMES="`_names_of_FUNCTIONS | _remove_bad_NAMES | xargs echo`" 284 _list_function_BODIES="_bodies_of_FUNCTIONS $_function_NAMES" 285 if [ "$_function_NAMES" = "" ] ; then 286 # no functions selected 287 _list_function_BODIES="true" 288 fi 289 unset _function_NAMES 290 291 # Grep variable names 292 _variable_NAMES="`_names_of_VARIABLES | _remove_bad_NAMES | xargs echo`" 293 _list_variable_VALUES="_bodies_of_VARIABLES $_variable_NAMES" 294 if [ "$_variable_NAMES" = "" ] ; then 295 # no variables selected 296 _list_variable_VALUES="true" 297 fi 298 unset _variable_NAMES 299 300 PARALLEL_ENV="` 301 $_list_alias_BODIES; 302 $_list_function_BODIES; 303 $_list_variable_VALUES; 304 `" 305 export PARALLEL_ENV 306 unset _list_alias_BODIES _list_variable_VALUES _list_function_BODIES 307 unset _bodies_of_ALIASES _bodies_of_VARIABLES _bodies_of_FUNCTIONS 308 unset _names_of_ALIASES _names_of_VARIABLES _names_of_FUNCTIONS 309 unset _ignore_HARDCODED _ignore_READONLY _ignore_UNDERSCORE 310 unset _remove_bad_NAMES _grep_REGEXP 311 unset _prefix_PARALLEL_ENV 312 # Test if environment is too big 313 if `_which_PAR true` >/dev/null 2>/dev/null ; then 314 parallel "$@" 315 _parallel_exit_CODE=$? 316 # Clean up variables/functions 317 unset PARALLEL_ENV 318 unset _which_PAR _which_TRUE 319 unset _warning_PAR _error_PAR 320 # Unset _parallel_exit_CODE before return 321 eval "unset _parallel_exit_CODE; return $_parallel_exit_CODE" 322 else 323 unset PARALLEL_ENV; 324 _error_PAR "Your environment is too big." 325 _error_PAR "You can try 3 different approaches:" 326 _error_PAR "1. Run 'env_parallel --session' before you set" 327 _error_PAR " variables or define functions." 328 _error_PAR "2. Use --env and only mention the names to copy." 329 _error_PAR "3. Try running this in a clean environment once:" 330 _error_PAR " env_parallel --record-env" 331 _error_PAR " And then use '--env _'" 332 _error_PAR "For details see: man env_parallel" 333 return 255 334 fi 335} 336 337parset() { 338 _parset_PARALLEL_PRG=parallel 339 _parset_main "$@" 340} 341 342env_parset() { 343 _parset_PARALLEL_PRG=env_parallel 344 _parset_main "$@" 345} 346 347_parset_main() { 348 # If $1 contains ',' or space: 349 # Split on , to get the destination variable names 350 # If $1 is a single destination variable name: 351 # Treat it as the name of an array 352 # 353 # # Create array named myvar 354 # parset myvar echo ::: {1..10} 355 # echo ${myvar[5]} 356 # 357 # # Put output into $var_a $var_b $var_c 358 # varnames=(var_a var_b var_c) 359 # parset "${varnames[*]}" echo ::: {1..3} 360 # echo $var_c 361 # 362 # # Put output into $var_a4 $var_b4 $var_c4 363 # parset "var_a4 var_b4 var_c4" echo ::: {1..3} 364 # echo $var_c4 365 366 _make_TEMP() { 367 # mktemp does not exist on some OS 368 perl -e 'use File::Temp qw(tempfile); 369 $ENV{"TMPDIR"} ||= "/tmp"; 370 print((tempfile(DIR=>$ENV{"TMPDIR"}, TEMPLATE => "parXXXXX"))[1])' 371 } 372 373 _parset_NAME="$1" 374 if [ "$_parset_NAME" = "" ] ; then 375 echo parset: Error: No destination variable given. >&2 376 echo parset: Error: Try: >&2 377 echo parset: Error: ' ' parset myarray echo ::: foo bar >&2 378 return 255 379 fi 380 if [ "$_parset_NAME" = "--help" ] ; then 381 echo parset: Error: Usage: >&2 382 echo parset: Error: ' ' parset varname GNU Parallel options and command >&2 383 echo 384 parallel --help 385 return 255 386 fi 387 if [ "$_parset_NAME" = "--version" ] ; then 388 echo "parset 20211122 (GNU parallel `parallel --minversion 1`)" 389 echo "Copyright (C) 2007-2021 Ole Tange, http://ole.tange.dk and Free Software" 390 echo "Foundation, Inc." 391 echo "License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>" 392 echo "This is free software: you are free to change and redistribute it." 393 echo "GNU parallel comes with no warranty." 394 echo 395 echo "Web site: https://www.gnu.org/software/parallel" 396 echo 397 echo "When using programs that use GNU Parallel to process data for publication" 398 echo "please cite as described in 'parallel --citation'." 399 echo 400 return 255 401 fi 402 shift 403 echo "$_parset_NAME" | 404 perl -ne 'chomp;for (split /[, ]/) { 405 # Allow: var_32 var[3] 406 if(not /^[a-zA-Z_][a-zA-Z_0-9]*(\[\d+\])?$/) { 407 print STDERR "parset: Error: $_ is an invalid variable name.\n"; 408 print STDERR "parset: Error: Variable names must be letter followed by letters or digits.\n"; 409 print STDERR "parset: Error: Usage:\n"; 410 print STDERR "parset: Error: parset varname GNU Parallel options and command\n"; 411 $exitval = 255; 412 } 413 } 414 exit $exitval; 415 ' || return 255 416 _exit_FILE=`_make_TEMP` 417 if perl -e 'exit not grep /,| /, @ARGV' "$_parset_NAME" ; then 418 # $_parset_NAME contains , or space 419 # Split on , or space to get the names 420 eval "` 421 # Compute results into files 422 ($_parset_PARALLEL_PRG --files -k "$@"; echo $? > "$_exit_FILE") | 423 # var1= cat tmpfile1; rm tmpfile1 424 # var2= cat tmpfile2; rm tmpfile2 425 parallel -q echo {2}='\`cat {1}; rm {1}\`' :::: - :::+ \` 426 echo "$_parset_NAME" | 427 perl -pe 's/,/ /g' 428 \` 429 `" 430 else 431 # $_parset_NAME does not contain , or space 432 # => $_parset_NAME is the name of the array to put data into 433 # Supported in: bash zsh ksh mksh 434 # Arrays do not work in: sh ash dash 435 eval "$_parset_NAME=( $( 436 # Compute results into files. Save exit value 437 ($_parset_PARALLEL_PRG --files -k "$@"; echo $? > "$_exit_FILE") | 438 perl -pe 'chop;$_="\"\`cat $_; rm $_\`\" "' 439 ) )" 440 fi 441 unset _parset_NAME _parset_PARALLEL_PRG _parallel_exit_CODE 442 # Unset _exit_FILE before return 443 eval "unset _exit_FILE; return \`cat $_exit_FILE; rm $_exit_FILE\`" 444} 445