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update math to use argparse

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This commit is contained in:
Kurtis Rader 2017-07-13 13:53:46 -07:00
parent 140e6204be
commit e8243af20b
1 changed files with 13 additions and 17 deletions
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26
share/functions/math.fish
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@ -1,24 +1,20 @@
function math --description "Perform math calculations in bc"
set -l scale 0 # default is integer arithmetic
set -l options 'h/help' 's/scale='
argparse -n math --min-args=1 $options -- $argv
or return
if set -q argv[1]
switch $argv[1]
case '-s*' # user wants to specify the scale of the output
set scale (string replace -- '-s' '' $argv[1])
if not string match -q -r '^\d+$' "$scale"
echo 'Expected an integer to follow -s' >&2
return 2 # missing argument is an error
end
set -e argv[1]
case -h --h --he --hel --help
if set -q _flag_help
__fish_print_help math
return 0
end
end
if not set -q argv[1]
return 2 # no arguments is an error
set -l scale 0 # default is integer arithmetic
if set -q _flag_scale
set scale $_flag_scale
if not string match -q -r '^\d+$' "$scale"
printf (_ "%s: Expected an integer to follow --scale") math >&2
return 2 # missing argument is an error
end
end
# Set BC_LINE_LENGTH to a ridiculously high number so it only uses one line for most results.