commit 1b977b82cb1805352e87858ff6300b0f271c7e04 parent 36e9c8c26bc08fda570601b0cbf417bbe8a032f0 Author: Alex Balgavy <alex@balgavy.eu> Date: Mon, 25 Apr 2022 22:18:55 +0200 xe: allow piping amount from stdin Diffstat:
| M | scripts/xe | | | 26 | ++++++++++++++++++++++---- |
1 file changed, 22 insertions(+), 4 deletions(-)
diff --git a/scripts/xe b/scripts/xe @@ -1,12 +1,30 @@ #!/bin/sh # A CLI utility for exchange rates via https://www.xe.com +checkdeps() { + for com in "$@"; do + command -v "$com" >/dev/null 2>&1 \ + || { printf '%s required but not found.\n' "$com" >&2 && exit 1; } + done +} +checkdeps curl pup tr die() { printf '%s\n' "$1" >&2 && exit 1; } -[ $# -eq 3 ] || die 'Usage: xe AMOUNT FROM_CURRENCY TO_CURRENCY' -amount="$1" -from="$(printf '%s' "$2" | tr '[[:lower:]]' '[[:upper:]]')" -to="$(printf '%s' "$3" | tr '[[:lower:]]' '[[:upper:]]')" +# if args == amount from to +if [ $# -eq 3 ]; then + amount="$1" + from="$(printf '%s' "$2" | tr '[:lower:]' '[:upper:]')" + to="$(printf '%s' "$3" | tr '[:lower:]' '[:upper:]')" +# if args == from to, and amount on stdin +elif ! [ -t 0 ] && [ $# -eq 2 ]; then + read -r amount + from="$(printf '%s' "$1" | tr '[:lower:]' '[:upper:]')" + to="$(printf '%s' "$2" | tr '[:lower:]' '[:upper:]')" +# else usage is incorrect +else + die 'Usage: xe AMOUNT FROM_CURRENCY TO_CURRENCY' +fi + curl -sL "https://www.xe.com/currencyconverter/convert/?Amount=$amount&From=$from&To=$to" \ -H 'authority: www.xe.com' \