fix(user/bk-copy-rand-music):Follow direct symlinks to files
[BK-2020-03.git] / unitproc / bkt-writeArg
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e81d4d96
SBS
1#!/bin/bash
2
3# Desc: Template function to write data supplied as argument
4
5yell() { echo "$0: $*" >&2; } # Yell, Die, Try Three-Fingered Claw technique; # Ref/Attrib: https://stackoverflow.com/a/25515370
6die() { yell "$*"; exit 111; }
7try() { "$@" || die "cannot $*"; }
8writeArg(){
9 # Desc: Writes first argument with subsequent arguments as options
10 # Usage: writeArg "$(echo "Data to be written.")" [output path] ([cmd1] [cmd2] [cmd3] [cmd4]...)
11 # Input: arg1: data to be written
12 # arg2: output path
13 # arg3+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ")
14 # Output: file written to disk
15 # Example: decrypt multiple large files in parallel
16 # writeArg "$(cat /tmp/largefile1.gpg)" /tmp/largefile1 "gpg --decrypt" &
17 # writeArg "$(cat /tmp/largefile2.gpg)" /tmp/largefile2 "gpg --decrypt" &
18 # writeArg "$(cat /tmp/largefile3.gpg)" /tmp/largefile3 "gpg --decrypt" &
19 # Depends: bash 5
20
21 # Set command strings
22 if ! [ -z "$3" ]; then CMD1="$3"; else CMD1="tee /dev/null "; fi # command string 1
23 if ! [ -z "$4" ]; then CMD2="$4"; else CMD2="tee /dev/null "; fi # command string 2
24 if ! [ -z "$5" ]; then CMD3="$5"; else CMD3="tee /dev/null "; fi # command string 3
25 if ! [ -z "$6" ]; then CMD4="$6"; else CMD4="tee /dev/null "; fi # command string 4
26
27 # Debug
28 yell "CMD1:$CMD1"
29 yell "CMD2:$CMD2"
30 yell "CMD3:$CMD3"
31 yell "CMD4:$CMD4"
32 # Write
33 echo "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$2";
34
32472039 35} # Write Bash var to file
e81d4d96
SBS
36
37#==BEGIN sample code==
38myFile="/tmp/$(date +%s)..original"
39echo "how are you doing?" > "$myFile"
40myVAR="$(cat $myFile)"
41writeArg "$myVAR" "$myFile..LOUD_CHILD" "tee /tmp/cloneityclone " "tr '[:lower:]' '[:upper:]'"
42#==END sample code==
43
44# Author: Steven Baltakatei Sandoval
45# License: GPLv3+