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https://github.com/notwa/rc
synced 2024-05-18 01:53:22 -07:00
change argc interface (now $# comes first instead of $@)
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39
sh/argc
39
sh/argc
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@ -6,53 +6,58 @@
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argc() { ### @- validate the number of arguments in a function.
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### ```sh
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### # usage: myfunc() { argc -(eq|le|ge) [0-9] "$0" "$@" || return; }
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### # usage: myfunc() { argc $# -(eq|le|ge) [0-9] "$0" || return; }
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###
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### myfunc() {
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### # use one of the following:
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### argc -eq N "$0" "$@" || return
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### argc -le N "$0" "$@" || return
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### argc -ge N "$0" "$@" || return
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### argc $# -eq N "$0" || return
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### argc $# -le N "$0" || return
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### argc $# -ge N "$0" || return
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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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# local usage='usage: myfunc() { %s -(eq|lt|gt|le|ge) [0-9] "$0" "$@" || return; }\n'
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local usage='usage: myfunc() { %s -(eq|le|ge) [0-9] "$0" "$@" || return; }\n'
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local usage='usage: myfunc() { %s $# -(eq|le|ge) [0-9] "$0" || return; }\n'
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# note that $zero can be empty, but must be set.
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if [ $# -lt 3 ] || [ -z "$1" ] || [ -z "$2" ] || [ "${3+x}" != x ]; then
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if [ $# -ne 4 ] || [ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ]; then
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printf "$usage" argc >&2
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return 2
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fi
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local argc="$1"; shift
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local cond="$1"; shift
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local want="$1"; shift
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local zero="$1"; shift
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local many='' plural=''
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[ "$want" = 1 ] || plural='s'
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if [ "$argc" != "${argc%%[!0-9]*}" ]; then
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printf "$usage" argc >&2
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return 2
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fi
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case "$cond" in
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'-eq') many='exactly';;
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# '-lt') many='fewer than';;
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# '-gt') many='more than';;
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'-le') many='at most';;
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'-ge') many='at least';;
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*)
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('-eq') many='exactly';;
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('-le') many='at most';;
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('-ge') many='at least';;
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(*)
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printf "$usage" argc >&2
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return 2;;
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esac
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case "$want" in
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[0-9]) :;; # no error, continue.
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*)
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([0-9]) :;; # no error, continue.
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(*)
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printf "$usage" argc >&2
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return 2;;
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esac
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if [ ! $# "$cond" "$want" ]; then
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if [ "$argc" "$cond" "$want" ] 2>/dev/null; then
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:
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else
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local err="expected $many $want argument$plural, got"
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printf '%s: %s %s\n' "$zero" "$err" "$#" >&2
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printf '%s: %s %s\n' "$zero" "$err" "$argc" >&2
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return 1
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fi
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@ -15,7 +15,7 @@ baknow() { ### @- backup files by appending their timestamps given by [`now`.](#
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### -rw-r--r-- 1 notwa None 0 Dec 25 2001 butts
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### -rw-r--r-- 1 notwa None 0 Dec 25 2001 butts.2001-12-26_01800000.bak
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### ```
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 1 "$0" || return
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local ret=0
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for f; do
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cp -ip "$f" "$f.$(now "$f").bak" || ret=1
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4
sh/cutv
4
sh/cutv
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@ -7,8 +7,8 @@
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cutv() { ### @-
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### (WIP) create a short clip of a long video file.
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argc -ge 2 "$0" "$@" || return
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argc -le 4 "$0" "$@" || return
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argc $# -ge 2 "$0" || return
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argc $# -le 4 "$0" || return
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local nel="${1?missing length parameter}"
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local f="${2?missing file parameter}"
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local g="cut."${${f##*/}%.*}".mp4"
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2
sh/stfu
2
sh/stfu
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@ -35,7 +35,7 @@ stfu() { ### @-
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###
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###
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### ```
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 1 "$0" || return
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local dirty=0 temp="$STFU_DIR"
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if [ -z "$temp" ]; then
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@ -14,7 +14,7 @@ mpvs() { ### @- invoke mpv with some extra flags suited for streamed sources.
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}
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getladspa() {
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argc -eq 1 "$0" "$@" || return
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argc $# -eq 1 "$0" || return
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printf '%s' volume
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if [ -e "/usr/lib/ladspa/${1}.so" ]; then
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printf '%s' "ladspa=f=${1}:p=${1}"
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@ -36,7 +36,7 @@ _M_DANNY="$_M_PRE_EMPH,alimiter,dynaudnorm=f=400:g=5:p=1:m=32:r=0.1:c=1:s=9:t=0.
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_M_LEVEL="$(getladspa crap_level)"
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earphones() {
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argc -eq 0 "$0" "$@" || return
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argc $# -eq 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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@ -47,7 +47,7 @@ case "$(uname -n | tr A-Z a-z)" in
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neobanshee)
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speakers() {
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argc -eq 0 "$0" "$@" || return
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argc $# -eq 0 "$0" || return
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_M_PROCESS="highpass=311,$_M_KILL,$_M_NEO,alimiter=level_in=2"
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}
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speakers
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@ -56,7 +56,7 @@ case "$(uname -n | tr A-Z a-z)" in
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banshee)
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_M_SPEAKERS="$(getladspa crap_eq_const_T420)"
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speakers() {
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argc -eq 0 "$0" "$@" || return
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argc $# -eq 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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@ -69,7 +69,7 @@ esac
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mpv_watch() { ### @-
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### play some media in mpv with a bunch of unnecessary filters.
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 1 "$0" || return
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pushd ~/play >/dev/null
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local url="$1"; shift
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@ -88,7 +88,7 @@ mpv_watch() { ### @-
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mpv_stream() { ### @-
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### watch a stream in mpv with a bunch of unnecessary filters.
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 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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@ -97,7 +97,7 @@ mpv_stream() { ### @-
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twitch() { ### @-
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### watch a twitch stream in mpv with a bunch of unnecessary filters.
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 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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@ -110,7 +110,7 @@ yt() { ### @-
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###
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### **NOTE:** there also exists a yt(1) program provided by
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### the *python3-yt* package that i don't use.
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 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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@ -118,7 +118,7 @@ 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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argc -ge 1 "$0" "$@" || return
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argc $# -ge 1 "$0" || return
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local vid="$1"; shift
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# --ytdl-format=22/95/300/best
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yt "$vid" "$@"
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@ -127,26 +127,26 @@ ytg() { # @-
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ytll() { ### @-
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### watch a stream from youtube in mpv, etcetera etcetera.
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### this is the low latency version that does not support seeking.
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 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 from youtube in mpv. like `ytll`, but with a preference for different formats.
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argc -ge 1 "$0" "$@" || return
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argc $# -ge 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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argc -ge 1 "$0" "$@" || return
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argc $# -ge 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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argc -ge 1 "$0" "$@" || return
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argc $# -ge 1 "$0" || return
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# --ytdl-format=251/300/best
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_M_PROCESS="acompressor=threshold=0.001:ratio=1.33:attack=900:release=6000:makeup=6:knee=8:mix=0.9,alimiter" \
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yt "$@" --volume=90
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