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|
#!/bin/sh
set -eu
set -o pipefail
usage() {
cat <<-'EOF'
Usage:
rfc [-w FORMAT] RFC_NUMBER
rfc -h
EOF
}
help() {
cat <<-'EOF'
Options:
-w FORMAT Choose between text (txt, the default) and
JSON (json)
-h, --help show this message
EOF
}
for flag in "$@"; do
case "$flag" in
--)
break
;;
--help)
usage
help
exit
;;
*)
;;
esac
done
FORMAT='txt'
while getopts 'w:h' flag; do
case "$flag" in
w)
case "$OPTARG" in
json|txt)
FORMAT="$OPTARG"
;;
*)
printf 'Bad FORMAT options: %s\n' \
"$OPTARG" >&2
exit 2
;;
esac
;;
h)
usage
help
exit
;;
*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
if [ -z "${1:-}" ]; then
echo 'Missing argument RFC_NUMBER' >&2
usage >&2
exit 2
fi
if [ ! -e "$HOME/.local/share/doc/rfc/rfc$1.$FORMAT" ]; then
printf 'Given RFC_NUMBER "%s" does not exist\n' "$1" >&2
exit 2
fi
view() {
if [ -t 1 ]; then
$PAGER
else
cat -
fi
}
case "$FORMAT" in
txt)
cat "$HOME/.local/share/doc/rfc/rfc$1.txt" | view
;;
json)
jq < "$HOME/.local/share/doc/rfc/rfc$1.json" | view
;;
*)
printf 'Unreachable: unsupported FORMAT "%s"\n' \
"$FORMAT" >&2
exit 2
;;
esac
|
