mirror of
https://git.savannah.gnu.org/git/parallel.git
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242 lines
7.8 KiB
Bash
Executable file
242 lines
7.8 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) 2016,2017
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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.bash
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_names_of_ALIASES() {
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compgen -a
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}
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_bodies_of_ALIASES() {
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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 "$@"
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}
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_remove_bad_NAMES() {
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# Do not transfer vars and funcs from env_parallel
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grep -Ev '^(_names_of_ALIASES|_bodies_of_ALIASES|_names_of_maybe_FUNCTIONS|_names_of_FUNCTIONS|_bodies_of_FUNCTIONS|_names_of_VARIABLES|_bodies_of_VARIABLES|_remove_bad_NAMES|_prefix_PARALLEL_ENV|_get_ignored_VARS|_make_grep_REGEXP|_ignore_UNDERSCORE|_alias_NAMES|_list_alias_BODIES|_function_NAMES|_list_function_BODIES|_variable_NAMES|_list_variable_VALUES|_prefix_PARALLEL_ENV|PARALLEL_TMP)$' |
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# Filter names matching --env
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grep -E "^$_grep_REGEXP"\$ | grep -vE "^$_ignore_UNDERSCORE"\$ |
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grep -vFf <(readonly) |
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grep -Ev '^(BASHOPTS|BASHPID|EUID|GROUPS|FUNCNAME|DIRSTACK|_|PIPESTATUS|PPID|SHELLOPTS|UID|USERNAME|BASH_[A-Z_]+)$'
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}
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_prefix_PARALLEL_ENV() {
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shopt 2>/dev/null |
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perl -pe 's:\s+off:;: and s/^/shopt -u /;
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s:\s+on:;: and s/^/shopt -s /;
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s:;$:&>/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, "<", "$ENV{HOME}/.parallel/ignored_vars")) {
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print STDERR "parallel: Error: ",
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"Run \"parallel --record-env\" in a clean environment first.\n";
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} else {
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chomp(@ignored_vars = <IN>);
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$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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' -- "$@"
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}
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# Get the --env variables if set
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# --env _ should be ignored
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# and convert a b c to (a|b|c)
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# If --env not set: Match everything (.*)
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_make_grep_REGEXP() {
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perl -e '
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for(@ARGV){
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/^_$/ 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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# 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 parallel`" == "" ]; then
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echo 'env_parallel: Error: parallel must be in $PATH.' >&2
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return 255
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fi
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# Grep regexp for vars given by --env
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_grep_REGEXP="`_make_grep_REGEXP \"$@\"`"
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# Deal with --env _
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_ignore_UNDERSCORE="`_get_ignored_VARS \"$@\"`"
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# --record-env
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# Bash is broken in version 3.2.25 and 4.2.39
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# The crazy '[ "`...`" == 0 ]' is needed for the same reason
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if [ "`perl -e 'exit grep { /^--record-env$/ } @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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# Grep alias names
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_alias_NAMES="`_names_of_ALIASES | _remove_bad_NAMES`"
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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`"
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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`"
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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 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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$_list_variable_VALUES;
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`"
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export PARALLEL_ENV
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unset _list_alias_BODIES
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unset _list_variable_VALUES
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unset _list_function_BODIES
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# Test if environment is too big
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if [ "`which true`" == "$_which_true" ] ; then
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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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else
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unset PARALLEL_ENV;
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echo "env_parallel: Error: Your environment is too big." >&2
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echo "env_parallel: Error: Try running this in a clean environment once:" >&2
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echo "env_parallel: Error: env_parallel --record-env" >&2
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echo "env_parallel: Error: And the use '--env _'" >&2
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echo "env_parallel: Error: For details see: man env_parallel" >&2
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return 255
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fi
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}
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parset() {
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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="$1"
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shift
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if [ "$_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 myvar echo ::: foo >&2
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return 255
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fi
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echo "$_parset_name" |
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perl -ne 'chomp;for (split /[, ]/) {
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if(not /^[a-zA-Z_][a-zA-Z_0-9]*$/) {
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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 $exitval;
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' || return 255
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if echo "$_parset_name" | grep -E ',| ' >/dev/null ; then
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# $1 contains , or space
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# Split on , or space to get the names
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eval "$(
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# Compute results into files
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parallel --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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# $1 contains no space or ,
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# => $1 is the name of the array to put data into
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eval $_parset_name="( $( parallel --files -k "$@" |
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perl -pe 'chop;$_="\"\`cat $_; rm $_\`\" "' ) )"
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fi
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}
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