mirror of
https://git.savannah.gnu.org/git/parallel.git
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319 lines
10 KiB
Bash
Executable file
319 lines
10 KiB
Bash
Executable file
#!/usr/bin/env sh
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# This file must be sourced in sh:
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#
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# . `which env_parallel.sh`
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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) 2016,2017,2018
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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.sh
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_names_of_ALIASES() {
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# alias fails on Unixware 5
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for _i in `alias 2>/dev/null | perl -ne 's/^alias //;s/^(\S+)=.*/$1/ && print' 2>/dev/null`; do
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# Check if this name really is an alias
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# or just part of a multiline alias definition
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if alias $_i >/dev/null 2>/dev/null; then
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echo $_i
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fi
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done
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}
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_bodies_of_ALIASES() {
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# alias may return:
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# myalias='definition' (GNU/Linux ash)
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# alias myalias='definition' (FreeBSD ash)
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# so remove 'alias ' from first line
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for _i in "$@"; do
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echo 'alias '"`alias $_i | perl -pe '1..1 and s/^alias //'`"
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done
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}
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_names_of_maybe_FUNCTIONS() {
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set | perl -ne '/^([A-Z_0-9]+)\s*\(\)\s*\{?$/i and print "$1\n"'
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}
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_names_of_FUNCTIONS() {
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# myfunc is a function
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LANG=C type `_names_of_maybe_FUNCTIONS` |
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perl -ne '/^(\S+) is a function$/ and not $seen{$1}++ and print "$1\n"'
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}
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_bodies_of_FUNCTIONS() {
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LANG=C type "$@" | perl -ne '/^(\S+) is a function$/ or print'
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}
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_names_of_VARIABLES() {
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# This may screw up if variables contain \n and =
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set | perl -ne 's/^(\S+?)=.*/$1/ and print;'
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}
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_bodies_of_VARIABLES() {
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# Crappy typeset -p
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for _i in "$@"
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do
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perl -e 'print @ARGV' "$_i="
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eval echo \"\$$_i\" | perl -e '$/=undef; $a=<>; chop($a); print $a' |
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perl -pe 's/[\002-\011\013-\032\\\#\?\`\(\)\{\}\[\]\^\*\<\=\>\~\|\; \"\!\$\&\202-\377]/\\$&/go;'"s/'/\\\'/g; s/[\n]/'\\n'/go;";
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echo
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done
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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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# Some versions of grep do not support -E: Use perl
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# grep -Ev '^(_names_of_ALIASES|_bodies_of_ALIASES|_names_of_maybe_FUNCTIONS|_names_of_FUNCTIONS|_bodies_of_FUNCTIONS|_names_of_VARIABLES|_bodies_of_VARIABLES|_remove_bad_NAMES|_prefix_PARALLEL_ENV|_get_ignored_VARS|_make_grep_REGEXP|_ignore_UNDERSCORE|_alias_NAMES|_list_alias_BODIES|_function_NAMES|_list_function_BODIES|_variable_NAMES|_list_variable_VALUES|_prefix_PARALLEL_ENV|PARALLEL_TMP)$' |
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perl -ne '/^(_names_of_ALIASES|_bodies_of_ALIASES|_names_of_maybe_FUNCTIONS|_names_of_FUNCTIONS|_bodies_of_FUNCTIONS|_names_of_VARIABLES|_bodies_of_VARIABLES|_remove_bad_NAMES|_prefix_PARALLEL_ENV|_get_ignored_VARS|_make_grep_REGEXP|_ignore_UNDERSCORE|_alias_NAMES|_list_alias_BODIES|_function_NAMES|_list_function_BODIES|_variable_NAMES|_list_variable_VALUES|_prefix_PARALLEL_ENV|PARALLEL_TMP)$/ 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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# Vars set by /bin/sh
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/^(_|TIMEOUT)$/ and next;
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print;'
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}
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_get_ignored_VARS() {
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perl -e '
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for(@ARGV){
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$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 $_ } "env_parallel", @ignored_vars;
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print $vars ? "($vars)" : "(,,nO,,VaRs,,)";
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' -- "$@"
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}
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# Get the --env variables if set
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# --env _ should be ignored
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# and convert a b c to (a|b|c)
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# If --env not set: Match everything (.*)
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_make_grep_REGEXP() {
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perl -e '
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for(@ARGV){
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/^_$/ 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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' -- "$@"
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}
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_which() {
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# type returns:
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# ll is an alias for ls -l (in ash)
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# bash is a tracked alias for /bin/bash
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# true is a shell builtin
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# myfunc is a function (in bash)
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# myfunc is a shell function (in zsh)
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# which is /usr/bin/which
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# which is hashed (/usr/bin/which)
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# aliased to `alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'
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# Return 0 if found, 1 otherwise
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LANG=C type "$@" |
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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() {
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echo "env_parallel: Warning: $@" >&2
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}
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_error() {
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echo "env_parallel: Error: $@" >&2
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}
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if _which parallel >/dev/null; then
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true parallel found in path
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else
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_error 'parallel must be in $PATH.'
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return 255
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fi
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# Grep regexp for vars given by --env
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_grep_REGEXP="`_make_grep_REGEXP \"$@\"`"
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# Deal with --env _
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_ignore_UNDERSCORE="`_get_ignored_VARS \"$@\"`"
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# --record-env
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if perl -e 'exit grep { /^--record-env$/ } @ARGV' -- "$@"; 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 > $HOME/.parallel/ignored_vars
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return 0
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fi
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# --session
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if perl -e 'exit grep { /^--session$/ } @ARGV' -- "$@"; then
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true skip
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else
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PARALLEL_IGNORED_NAMES="`_names_of_ALIASES;
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_names_of_FUNCTIONS;
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_names_of_VARIABLES`"
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export PARALLEL_IGNORED_NAMES
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return 0
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fi
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# Grep alias names
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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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_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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_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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PARALLEL_ENV="`
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$_list_alias_BODIES;
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$_list_function_BODIES;
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$_list_variable_VALUES;
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`"
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export PARALLEL_ENV
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unset _list_alias_BODIES
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unset _list_variable_VALUES
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unset _list_function_BODIES
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unset _grep_REGEXP
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unset _ignore_UNDERSCORE
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# Test if environment is too big
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if `_which true` >/dev/null 2>/dev/null ; then
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parallel "$@";
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_parallel_exit_CODE=$?
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unset PARALLEL_ENV;
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return $_parallel_exit_CODE
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else
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unset PARALLEL_ENV;
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_error "Your environment is too big."
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_error "You can try 3 different approaches:"
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_error "1. Run 'env_parallel --session' before you set"
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_error " variables or define functions."
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_error "2. Use --env and only mention the names to copy."
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_error "3. Try running this in a clean environment once:"
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_error " env_parallel --record-env"
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_error " And then use '--env _'"
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_error "For details see: man env_parallel"
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return 255
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fi
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}
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parset() {
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_parset_parallel_prg=parallel
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_parset_main "$@"
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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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shift
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echo "$_parset_name" |
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perl -ne 'chomp;for (split /[, ]/) {
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# Allow: var_32 var[3]
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if(not /^[a-zA-Z_][a-zA-Z_0-9]*(\[\d+\])?$/) {
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print STDERR "parset: Error: $_ is an invalid variable name.\n";
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print STDERR "parset: Error: Variable names must be letter followed by letters or digits.\n";
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$exitval = 255;
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}
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}
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exit $exitval;
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' || return 255
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if perl -e 'exit not grep /,| /, @ARGV' "$_parset_name" ; then
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# $_parset_name contains , or space
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# Split on , or space to get the names
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eval "`
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# Compute results into files
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$_parset_parallel_prg --files -k "$@" |
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# var1= cat tmpfile1; rm tmpfile1
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# var2= cat tmpfile2; rm tmpfile2
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parallel -q echo {2}='\`cat {1}; rm {1}\`' :::: - :::+ \`
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echo "$_parset_name" |
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perl -pe 's/,/ /g'
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\`
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`"
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else
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# $_parset_name does not contain , or space
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# => $_parset_name is the name of the array to put data into
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# Supported in: bash zsh ksh
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# Arrays do not work in: ash dash
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eval "$_parset_name=( $( $_parset_parallel_prg --files -k "$@" |
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perl -pe 'chop;$_="\"\`cat $_; rm $_\`\" "' ) )"
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fi
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}
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