From: Steven Baltakatei Sandoval Date: Fri, 13 Jan 2023 04:09:11 +0000 (+0000) Subject: feat(up/bkt-read_stdin_psarg):add bash func to read stdin and posarg X-Git-Tag: 0.7.0~1 X-Git-Url: https://zdv2.bktei.com/gitweb/BK-2020-03.git/commitdiff_plain/b04a0c0f98b848c825faab171cbf52629ab6f2a5?hp=--cc feat(up/bkt-read_stdin_psarg):add bash func to read stdin and posarg - Note: bash function name: read_stdin_psarg() --- b04a0c0f98b848c825faab171cbf52629ab6f2a5 diff --git a/unitproc/bkt-read_stdin_psarg b/unitproc/bkt-read_stdin_psarg new file mode 100644 index 0000000..50f76a7 --- /dev/null +++ b/unitproc/bkt-read_stdin_psarg @@ -0,0 +1,50 @@ +#!/usr/bin/env bash + +yell() { echo "$0: $*" >&2; } # print script path and all args to stderr +die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status +must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails +read_stdin_psarg() { + # Desc: Consumes stdin and reads arguments; outputs as stdout lines + # Input: stdin (consumes) + # Input: args + # Output: stdout (newline delimited) + # Example: read_stdin_psarg "$@" + # Depends: GNU bash (version 5.1.16) + local input_stdin input_psarg output; + + # Store stdin + if [[ -p /dev/stdin ]]; then + input_stdin="$(cat -)"; + fi; + yell "DEBUG:$(declare -p input_stdin)"; + + # Store arguments + if [[ $# -gt 0 ]]; then + input_psarg="$@"; + fi; + yell "DEBUG:$(declare -p input_psarg)"; + + # Combine as output array elements + ## Read in stdin + if [[ -n $input_stdin ]]; then + while read -r line; do + output+=("$line"); + done < <(printf "%s\n" "$input_stdin"); + fi; + ## Read in positional arguments + if [[ -n $input_psarg ]]; then + for arg in "$@"; do + output+=("$arg"); + done; + fi; + yell "DEBUG:$(declare -p output)"; + + # Print to stdout + printf "%s\n" "${output[@]}"; +}; # read stdin and positional argument to stdout lines + +main() { + read_stdin_psarg "$@"; +}; + +main "$@";