mirror of
https://github.com/fish-shell/fish-shell.git
synced 2024-11-28 04:03:39 +08:00
50 lines
1.1 KiB
Fish
50 lines
1.1 KiB
Fish
|
# If seq is not installed, then define a function that invokes __fish_fallback_seq
|
||
|
|
# test -x in /usr/bin/seq because that's where it usually is and
|
||
|
|
# that's substantially cheaper than the type function
|
||
|
|
|
||
|
|
if begin ; not test -x /usr/bin/seq ; and not type -f seq > /dev/null; end
|
||
|
|
# No seq command
|
||
|
|
function seq --description "Print sequences of numbers"
|
||
|
|
__fish_fallback_seq $argv
|
||
|
|
end
|
||
|
|
|
||
|
|
function __fish_fallback_seq --description "Fallback implementation of the seq command"
|
||
|
|
|
||
|
|
set -l from 1
|
||
|
|
set -l step 1
|
||
|
|
set -l to 1
|
||
|
|
|
||
|
|
switch (count $argv)
|
||
|
|
case 1
|
||
|
|
set to $argv[1]
|
||
|
|
|
||
|
|
case 2
|
||
|
|
set from $argv[1]
|
||
|
|
set to $argv[2]
|
||
|
|
|
||
|
|
case 3
|
||
|
|
set from $argv[1]
|
||
|
|
set step $argv[2]
|
||
|
|
set to $argv[3]
|
||
|
|
|
||
|
|
case '*'
|
||
|
|
printf (_ "%s: Expected 1, 2 or 3 arguments, got %d\n") seq (count $argv)
|
||
|
|
exit 1
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
for i in $from $step $to
|
||
|
|
if not echo $i | grep -E '^-?[0-9]*([0-9]*|\.[0-9]+)$' >/dev/null
|
||
|
|
printf (_ "%s: '%s' is not a number\n") seq $i
|
||
|
|
exit 1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
if [ $step -ge 0 ]
|
||
|
|
echo "for( i=$from; i<=$to ; i+=$step ) i;" | bc
|
||
|
|
else
|
||
|
|
echo "for( i=$from; i>=$to ; i+=$step ) i;" | bc
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|