use ~/bin like a civilized nixer

1 files changed, 122 insertions, 0 deletions

diff --git a/fun/bin/pipes b/fun/bin/pipes
new file mode 100755
index 0000000..43e7046
--- /dev/null
+++ b/fun/bin/pipes
@@ -0,0 +1,122 @@
+#!/usr/bin/env bash
+# pipes.sh: Animated pipes terminal screensaver.
+#
+# This modified version is maintained at:
+#
+#   https://github.com/livibetter/pipes.sh
+
+# options:
+# s = straight [5-15]
+# f = rate [20-100]
+# t = style [0-5]
+# r = ttl
+
+VERSION=0.1.0
+
+M=32768
+p=1
+f=75 s=13 r=2000 t=0
+w=$(tput cols) h=$(tput lines)
+# ab -> idx = a*4 + b
+# 0: up, 1: right, 2: down, 3: left
+# 00 means going up   , then going up   -> ┃
+# 12 means going right, then going down -> ┓
+sets=(
+    "┃┏ ┓┛━┓  ┗┃┛┗ ┏━"
+    "│╭ ╮╯─╮  ╰│╯╰ ╭─"
+    "│┌ ┐┘─┐  └│┘└ ┌─"
+    "║╔ ╗╝═╗  ╚║╝╚ ╔═"
+    "|+ ++-+  +|++ +-"
+    "|/ \/-\  \|/\ /-"
+)
+v=()
+RNDSTART=0
+NOCOLOR=0
+
+OPTIND=1
+while getopts "p:t:f:s:r:RChv" arg; do
+case $arg in
+    p) ((p=(OPTARG>0)?OPTARG:p));;
+    t) ((OPTARG>=0 && OPTARG<${#sets[@]})) && V+=($OPTARG);;
+    f) ((f=(OPTARG>19 && OPTARG<101)?OPTARG:f));;
+    s) ((s=(OPTARG>4 && OPTARG<16 )?OPTARG:s));;
+    r) ((r=(OPTARG>=0)?OPTARG:r));;
+    R) RNDSTART=1;;
+    C) NOCOLOR=1;;
+    h) echo -e "Usage: $(basename $0) [OPTION]..."
+        echo -e "Animated pipes terminal screensaver.\n"
+        echo -e " -p [1-]\tnumber of pipes (D=1)."
+        echo -e " -t [0-$((${#sets[@]} - 1))]\ttype of pipes, can be used more than once (D=0)."
+        echo -e " -f [20-100]\tframerate (D=75)."
+        echo -e " -s [5-15]\tprobability of a straight fitting (D=13)."
+        echo -e " -r LIMIT\treset after x characters, 0 if no limit (D=2000)."
+        echo -e " -R \t\trandom starting point."
+        echo -e " -C \t\tno color."
+        echo -e " -h\t\thelp (this screen)."
+        echo -e " -v\t\tprint version number.\n"
+        exit 0;;
+    v) echo "$(basename -- "$0") $VERSION"
+        exit 0
+    esac
+done
+
+# set default values if not by options
+((${#V[@]})) || V=(0)
+
+# Attempt to workaround for Bash versions < 4, such as 3.2 on Mac:
+#   https://gist.github.com/livibetter/4689307/#comment-892368
+# Untested--in conduction of using shebang `env bash`--should fall back to
+# `sleep`
+printf -v SLEEP "read -t0.0$((1000/f)) -n 1"
+if $SLEEP &>/dev/null; (($? != 142)); then
+  printf -v SLEEP "sleep 0.0$((1000/f))"
+fi
+
+cleanup() {
+    # clear up standard input
+    read -t 0 && cat </dev/stdin>/dev/null
+
+    tput rmcup
+    tput cnorm
+    stty echo
+    exit 0
+}
+trap cleanup SIGHUP SIGINT SIGTERM
+
+for (( i=1; i<=p; i++ )); do
+    c[i]=$((i%8)) n[i]=0 l[i]=0
+    ((x[i]=RNDSTART==1?RANDOM*w/32768:w/2))
+    ((y[i]=RNDSTART==1?RANDOM*h/32768:h/2))
+    v[i]=${V[${#V[@]} * RANDOM / M]}
+done
+
+stty -echo
+tput smcup
+tput reset
+tput civis
+# any key press exits the loop and this script
+while $SLEEP; (($? > 128)) || [[ $SLEEP = sleep* ]] && (($? == 0)); do
+    for (( i=1; i<=p; i++ )); do
+        # New position:
+        ((${l[i]}%2)) && ((x[i]+=-${l[i]}+2,1)) || ((y[i]+=${l[i]}-1))
+
+        # Loop on edges (change color on loop):
+        ((${x[i]}>w||${x[i]}<0||${y[i]}>h||${y[i]}<0)) && ((c[i]=RANDOM%8, v[i]=V[${#V[@]}*RANDOM/M]))
+        ((x[i]=(x[i]+w)%w))
+        ((y[i]=(y[i]+h)%h))
+
+        # New random direction:
+        ((n[i]=RANDOM%s-1))
+        ((n[i]=(${n[i]}>1||${n[i]}==0)?${l[i]}:${l[i]}+${n[i]}))
+        ((n[i]=(${n[i]}<0)?3:${n[i]}%4))
+
+        # Print:
+        tput cup ${y[i]} ${x[i]}
+        [[ $NOCOLOR == 0 ]] && echo -ne "\033[1;3${c[i]}m"
+        echo -n "${sets[v[i]]:l[i]*4+n[i]:1}"
+        l[i]=${n[i]}
+    done
+    ((r>0 && t*p>=r)) && tput reset && tput civis && t=0 || ((t++))
+done
+
+cleanup
\ No newline at end of file