Shell Programming and Scripting

[sea@manjaro-desktop SWARM]$ time . ./runtime 
........
TODO : swarm.sanity.env
.............
 ----------- TEST AREA -----------
TODO case
# | SWARM 0.1                                                                                  2020.03.12 : 00:33

TODO case
# |                                                   my title                                               | # 

# |                                                                                                               | #
# | left                                               middle                                               right | #
 ----------- TEST AREA -----------

real	0m0.090s
user	0m0.125s
sys	0m0.018s

[sea@manjaro-desktop SWARM]$ ^Ctodo cleanup
bash: unset: `swarm.*': Ist kein gültiger Bezeichner.

[1]   Getötet                ( while ${PS:-\ps} ${PPID:-$PID} | ${GREP:-\grep} ${PPID:-$PID} >> /dev/zero; do
    export WIDTH="$(eval $TPUT cols)"; export LINES="$(eval $TPUT lines)"; $doLogExt && init.log "Updating geometrics for SWARM PID: ${PPID:-$PID}"; sleep ${SWARM_INTERVALL_GEOMETRY:-15};
done )
[2]   Getötet                ( while ${PS:-\ps} ${PPID:-$PID} | ${GREP:-\grep} ${PPID:-$PID} >> /dev/zero; do
    export WIDTH="$(eval $TPUT cols)"; export LINES="$(eval $TPUT lines)"; $doLogExt && init.log "Updating geometrics for SWARM PID: ${PPID:-$PID}"; sleep ${SWARM_INTERVALL_GEOMETRY:-15};
done )
[3]   Getötet                ( while ${PS:-\ps} ${PPID:-$PID} | ${GREP:-\grep} ${PPID:-$PID} >> /dev/zero; do
    export WIDTH="$(eval $TPUT cols)"; export LINES="$(eval $TPUT lines)"; $doLogExt && init.log "Updating geometrics for SWARM PID: ${PPID:-$PID}"; sleep ${SWARM_INTERVALL_GEOMETRY:-15};
done )
[4]   Getötet                ( while ${PS:-\ps} ${PPID:-$PID} | ${GREP:-\grep} ${PPID:-$PID} >> /dev/zero; do
    export WIDTH="$(eval $TPUT cols)"; export LINES="$(eval $TPUT lines)"; $doLogExt && init.log "Updating geometrics for SWARM PID: ${PPID:-$PID}"; sleep ${SWARM_INTERVALL_GEOMETRY:-15};
done )
[5]-  Getötet                ( while ${PS:-\ps} ${PPID:-$PID} | ${GREP:-\grep} ${PPID:-$PID} >> /dev/zero; do
    export WIDTH="$(eval $TPUT cols)"; export LINES="$(eval $TPUT lines)"; $doLogExt && init.log "Updating geometrics for SWARM PID: ${PPID:-$PID}"; sleep ${SWARM_INTERVALL_GEOMETRY:-15};
done )
[6]+  Getötet                ( while ${PS:-\ps} ${PPID:-$PID} | ${GREP:-\grep} ${PPID:-$PID} >> /dev/zero; do
    export WIDTH="$(eval $TPUT cols)"; export LINES="$(eval $TPUT lines)"; $doLogExt && init.log "Updating geometrics for SWARM PID: ${PPID:-$PID}"; sleep ${SWARM_INTERVALL_GEOMETRY:-15};
done )

[sea@manjaro-desktop SWARM]$ time . ./runtime 
........
TODO : swarm.sanity.env
.............
 ----------- TEST AREA -----------
# | SWARM 0.1                                                                                  2020.03.12 : 00:57 | #
# |                                                   my title                                                    | #
# |                                                                                                               | #
# | left                                               middle                                               right | #
real	0m0.099s
user	0m0.114s
sys	0m0.035s

 ----------- TEST AREA -----------
# | SWARM 0.3                                                                                  2020.03.13 : 03:38 | #
# |                                                   my title                                                    | #
# | left                                               middle                                               right | #
# | This                                                 is                                                 piped | #
# | Is this cool? (yn)                                                                                          y | #
0
 ----------- TEST AREA -----------

real	0m1.585s
user	0m0.122s
sys	0m0.044s
[sea@manjaro-desktop prjs]$ time . SWARM/runtime 
........
TODO : swarm.sanity.env
.............n
 ----------- TEST AREA -----------
# | SWARM 0.3                                                                                  2020.03.13 : 03:39 | #
# |                                                   my title                                                    | #
# | left                                               middle                                               right | #
# | This                                                 is                                                 piped | #
# | Is this cool? (yn)                                                                                            | #
1
 ----------- TEST AREA -----------

real	0m0.131s
user	0m0.141s
sys	0m0.043s

	ask() { # "What question?"
	# Ask a yes/no question, returns 0/true for yes and 1/false for no
	# y/n are taken from language file and are used in code
		# Check if 'yesno' is empty, if so, fill with fallback values
		[[ -z "${SWARM_MSG_ASK_YES}${SWARM_MSG_ASK_NO}" ]] && \
			SWARM_MSG_ASK_YES="+" && \
			SWARM_MSG_ASK_NO="-"

		swarm.print.border -e
		# Print the text
		$PRINTF "$(swarm.print.goto $(( ${#SWARM_THEME_DATA[border-left]} + 2  )))$1 (${SWARM_MSG_ASK_YES}${SWARM_MSG_ASK_NO})"
		# Move the cursor
		$PRINTF "$(swarm.print.goto $(( $COLUMNS / 2 * 2 - ${#SWARM_THEME_DATA[border-left]} - 2  )))"
		read -n1 answer
		$PRINTF "$posEND\n"

		case "$answer" in
		"+"|"$SWARM_MSG_ASK_YES")
				return 0
				;;
		"-"|"$SWARM_MSG_ASK_NO")
				return 1
				;;
		*)		return 1
				;;
		esac
	}

[sea/ .bin]$ cat testfile 
(
	declare -g my_test_a="a test"
	export my_test_b="an exported beer"
)
[sea/ .bin]$ . testfile 
[sea/ .bin]$ echo $my_test_a

[sea/ .bin]$ echo $my_test_b

#!/usr/bin/env bash

# @(#) s1       Demonstrate use of option "-g" in "declare".

LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C

(
        declare -g my_test_a="a test"
        export my_test_b="an exported beer"
)

unset my_test_a my_test_b
pl " Results, not in function:"
echo $my_test_a
echo $my_test_b

f1 ()
{
    declare -g my_test_a="a test"
    export my_test_b="an exported beer"
}

unset my_test_a my_test_b
pl " Results, in function f1:"
f1
echo $my_test_a
echo $my_test_b

exit

$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-7-amd64, x86_64
Distribution        : Debian 8.11 (jessie) 
bash GNU bash 4.3.30

-----
 Results, not in function:



-----
 Results, in function f1:
a test
an exported beer

...
In s1 line 21:
echo $my_test_a
     ^-- SC2031: my_test_a was modified in a subshell. That change might be lost. 
...