Created
June 19, 2020 17:00
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Pad strings in fish
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function string-pad --description 'Pad strings to a particular length using a character' | |
set -l options | |
set -a options "h/help" | |
set -a options "l/left" | |
set -a options "r/right" | |
set -a options "m/max=!_validate_int" | |
set -a options "n/count=!_validate_int" | |
set -a options "c/char=" | |
argparse --name="string-pad" $options -- $argv | |
or return | |
if set -q _flag_h | |
echo "string-pad [-l/--left] [-r/--right] [-n/--count|-m/max <int>] [-c/--char <char>] [<str> [<str>...]]" | |
return | |
end | |
if test \( -z "$_flag_n" -a -z "$_flag_m" \) | |
set _flag_n 0 | |
else if test \( -n "$_flag_n" -a -n "$_flag_m" \) | |
set_color red; echo "Must provide either -n/--count or -m/--max."; set_color normal | |
return | |
end | |
if ! set -q _flag_c; set _flag_c " "; end | |
if test (string length $_flag_c) -gt 1 | |
set_color red; echo "-c/--char must be a single character: $_flag_c"; set_color normal | |
return | |
end | |
if test \( -z "$_flag_l" -a -z "$_flag_r" \) | |
set _flag_l "-l" | |
end | |
if set -q _flag_n | |
if set -q _flag_l | |
set prefix (string repeat -n $_flag_n $_flag_c) | |
end | |
if set -q _flag_r | |
set suffix (string repeat -n $_flag_n $_flag_c) | |
end | |
for arg in $argv | |
printf "%s%s%s\n" $prefix $arg $suffix | |
end | |
else | |
for arg in $argv | |
set -l delta (math $_flag_m - (string length $arg)) | |
if test $delta -le 0 | |
set _left_len 0 | |
set _right_len 0 | |
else if test \( -n "$_flag_l" -a -n "$_flag_r" \) | |
set _left_len (math -s 0 $delta / 2) | |
set _right_len (math $delta - $_left_len) | |
else if set -q _flag_r | |
set _left_len 0 | |
set _right_len $delta | |
else | |
set _left_len $delta | |
set _right_len 0 | |
end | |
set -l prefix (string repeat -n $_left_len $_flag_c) | |
set -l suffix (string repeat -n $_right_len $_flag_c) | |
printf "%s%s%s\n" $prefix $arg $suffix | |
end | |
end | |
end |
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