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https://github.com/notwa/rc
synced 2024-06-28 18:17:11 -07:00
add simple argc-checking utility
this will be replaced in the next commit because i just thought of a better interface.
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81
sh/argc
Normal file
81
sh/argc
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@ -0,0 +1,81 @@
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#!/usr/bin/env sh
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# YES_ZSH
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# YES_BASH
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# YES_DASH
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# YES_ASH
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argc() { ### @-
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### ```sh
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### # usage:
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###
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### myfunc() {
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### argc X "$0" "$@" || return;
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### # ^-- replace X with one of the following:
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### # * N to expect an *exact* (==) number of arguments,
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### # * +N to expect *at least* (>=) some number of arguments,
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### # * -N to expect *at most* (<=) some number of arguments,
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### # where N is an integer between 0 and 9.
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### }
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### ```
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if [ $# -lt 2 ] || [ -z "$1" ] || [ -z "$2" ]; then
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printf 'usage: %s (N|+N|-N) "$0" "$@" || return\n' "$0" >&2
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return 2
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fi
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local want="$1"; shift
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local zero="$1"; shift
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local err=''
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case "$want" in
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# i realize hardcoding each case like this *looks* terrible,
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# but consider: there's only thirty cases we need to handle.
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# plus, i can write a specific error message for each.
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0) [ $# -eq 0 ] || err='expected no arguments, got';;
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1) [ $# -eq 1 ] || err='expected exactly one argument, got';;
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2) [ $# -eq 2 ] || err='expected exactly two arguments, got';;
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3) [ $# -eq 3 ] || err='expected exactly three arguments, got';;
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4) [ $# -eq 4 ] || err='expected exactly four arguments, got';;
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5) [ $# -eq 5 ] || err='expected exactly five arguments, got';;
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6) [ $# -eq 6 ] || err='expected exactly six arguments, got';;
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7) [ $# -eq 7 ] || err='expected exactly seven arguments, got';;
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8) [ $# -eq 8 ] || err='expected exactly eight arguments, got';;
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9) [ $# -eq 9 ] || err='expected exactly nine arguments, got';;
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+0) :;; # anything goes
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+1) [ $# -ge 1 ] || err='expected at least one argument, got';;
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+2) [ $# -ge 2 ] || err='expected at least two arguments, got';;
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+3) [ $# -ge 3 ] || err='expected at least three arguments, got';;
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+4) [ $# -ge 4 ] || err='expected at least four arguments, got';;
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+5) [ $# -ge 5 ] || err='expected at least five arguments, got';;
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+6) [ $# -ge 6 ] || err='expected at least six arguments, got';;
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+7) [ $# -ge 7 ] || err='expected at least seven arguments, got';;
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+8) [ $# -ge 8 ] || err='expected at least eight arguments, got';;
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+9) [ $# -ge 9 ] || err='expected at least nine arguments, got';;
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-0) [ $# -le 0 ] || err='expected no arguments, got';;
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-1) [ $# -le 1 ] || err='expected at most one argument, got';;
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-2) [ $# -le 2 ] || err='expected at most two arguments, got';;
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-3) [ $# -le 3 ] || err='expected at most three arguments, got';;
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-4) [ $# -le 4 ] || err='expected at most four arguments, got';;
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-5) [ $# -le 5 ] || err='expected at most five arguments, got';;
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-6) [ $# -le 6 ] || err='expected at most six arguments, got';;
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-7) [ $# -le 7 ] || err='expected at most seven arguments, got';;
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-8) [ $# -le 8 ] || err='expected at most eight arguments, got';;
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-9) [ $# -le 9 ] || err='expected at most nine arguments, got';;
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*)
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printf 'usage: %s (N|+N|-N) "$0" "$@" || return\n' "$0" >&2
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return 2;;
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esac
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if [ -n "$err" ]; then
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printf '%s: %s %s\n' "$zero" "$err" "$#" >&2
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return 1
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fi
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return 0
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}
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[ "${SOURCING:-0}" -gt 0 ] || argc "$@"
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@ -24,7 +24,7 @@ _M_LESS_INSANE="$_M_PRE_EMPH,acompressor=threshold=0.0020:ratio=1.41:attack=1000
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_M_NEO="equalizer=700:o:1.3:-5,equalizer=1200:o:1.3:-3,equalizer=1090:o:0.5:-5,equalizer=970:o:1.2:-10,equalizer=4100:o:0.3:-6"
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getladspa() {
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[ $# -eq 1 ] || { printf "%s\n" "$0: expected exactly one argument" >&2; return 1; }
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argc 1 "$0" "$@" || return
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REPLY=volume
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if [ -e "/usr/lib/ladspa/${1}.so" ]; then
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REPLY="ladspa=f=${1}:p=${1}"
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@ -37,7 +37,7 @@ _M_LEVEL="$REPLY"
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_nn="$(uname -n | tr A-Z a-z)"
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earphones() {
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[ $# -eq 0 ] || { printf "%s\n" "$0: unexpected arguments" >&2; return 1; }
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argc 0 "$0" "$@" || return
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_M_PROCESS="lowpass=8000:p=1,$_M_KILL,alimiter=level_out=0.707"
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}
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@ -46,7 +46,7 @@ if [ "$_nn" = spectre ]; then
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fi
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if [ "$_nn" = neobanshee ]; then
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speakers() {
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[ $# -eq 0 ] || { printf "%s\n" "$0: unexpected arguments" >&2; return 1; }
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argc 0 "$0" "$@" || return
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_M_PROCESS="highpass=311,$_M_KILL,$_M_NEO,alimiter=level_in=2"
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}
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speakers
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@ -55,7 +55,7 @@ if [ "$_nn" = banshee ]; then
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getladspa crap_eq_const_T420
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_M_SPEAKERS="$REPLY"
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speakers() {
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[ $# -eq 0 ] || { printf "%s\n" "$0: unexpected arguments" >&2; return 1; }
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argc 0 "$0" "$@" || return
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_M_PROCESS="$_M_LEVEL,$_M_SPEAKERS,alimiter=level_in=0.5"
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}
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speakers
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@ -65,7 +65,7 @@ unset _nn
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mpv_watch() { ### @-
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### watch something in mpv with a bunch of extra audio filtering crap.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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pushd ~/play >/dev/null
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local url="$1"; shift
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mpv \
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@ -77,7 +77,7 @@ mpv_watch() { ### @-
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mpv_stream() { ### @-
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### watch a stream in mpv with a bunch of extra audio filtering crap.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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pushd ~/play >/dev/null
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local url="$1"; shift
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mpvs --af=lavfi="[$_M_PROCESS]" "$@" "$url"
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@ -86,7 +86,7 @@ mpv_stream() { ### @-
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twitch() { ### @-
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### watch a twitch stream in mpv with a bunch of extra audio filtering crap.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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local user="$1"; shift
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mpv_stream "http://twitch.tv/$user" "$@"
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}
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@ -97,7 +97,7 @@ yt() { ### @-
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### remaining arguments are passed to mpv.
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###
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### there exist several variants for more specific use cases.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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local vid="$1"; shift
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[ -e "$vid" ] || [ "$vid" != "${vid#http}" ] || vid="ytdl://$vid"
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mpv_watch "$vid" "$@"
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@ -105,7 +105,7 @@ yt() { ### @-
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ytg() { ### @-
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### watch a youtube video. like `yt`, but with a preference for different formats.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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local vid="$1"; shift
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yt "$vid" --ytdl-format=22/95/300/best "$@"
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}
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@ -113,26 +113,26 @@ ytg() { ### @-
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ytll() { ### @-
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### watch a stream on youtube in mpv, etcetera etcetera.
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### this is the low latency version that does not support seeking.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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youtube-dl -q -f best "$1" -o - | mpv_stream - --no-ytdl
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}
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ytgll() { ### @-
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### watch a stream on youtube in mpv. like `ytll`, but with a preference for different formats.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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youtube-dl -q -f 22/95/300/best "$1" -o - | mpv_stream - --no-ytdl
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}
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ai() { # @-
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# hai domo!
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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yt "$@" --slang=en --sub-font='Tekton Pro' --sub-bold=yes \
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--sub-font-size=60 --sub-border-color='#DD6180' --sub-margin-y=52
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}
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asmr() { # @-
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# for your aural pleasure.
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[ $# -gt 0 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
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argc +1 "$0" "$@" || return
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_M_PROCESS="acompressor=threshold=0.001:ratio=1.33:attack=900:release=6000:makeup=6:knee=8:mix=0.9,alimiter" \
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yt "$@" --volume=90 --ytdl-format=251/300/best
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}
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