From: Steven Baltakatei Sandoval Date: Sun, 30 Jun 2024 00:23:13 +0000 (+0000) Subject: feat(user/check_order.sh):Add script to check alphabetical order X-Git-Url: https://zdv2.bktei.com/gitweb/BK-2020-03.git/commitdiff_plain/2464c257165200dd78896a4165f33da8dd49583a?hp=e41f7d0594245a0c00cb82f44cee251e11300314 feat(user/check_order.sh):Add script to check alphabetical order --- diff --git a/user/check_order.sh b/user/check_order.sh new file mode 100755 index 0000000..bce5066 --- /dev/null +++ b/user/check_order.sh @@ -0,0 +1,61 @@ +#!/bin/bash +# Desc: Checks stdin for lines out of order. +# Input: stdin +# Output: stdout +# Version: 0.0.1 + +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 $*"; } # runs args as command, reports args if command fails +read_stdin() { + # Desc: Consumes stdin; outputs as stdout lines + # Input: stdin (consumes) + # Output: stdout (newline delimited) + # return 0 stdin read + # return 1 stdin not present + # Example: printf "foo\nbar\n" | read_stdin + # Depends: GNU bash (version 5.1.16), GNU Coreutils 8.32 (cat) + # Version: 0.1.1 + # Attrib: Steven Baltakatei Sandoval (2024-01-29). reboil.com + local input_stdin output; + + # Store stdin + if [[ -p /dev/stdin ]]; then + input_stdin="$(cat -)" || { + echo "FATAL:Error reading stdin." 1>&2; return 1; }; + else + return 1; + fi; + + # Store as output array elements + ## Read in stdin + if [[ -n $input_stdin ]]; then + while read -r line; do + output+=("$line"); + done < <(printf "%s\n" "$input_stdin") || { + echo "FATAL:Error parsing stdin."; return 1; }; + fi; + + # Print to stdout + printf "%s\n" "${output[@]}"; + + return 0; +}; # read stdin to stdout lines +main() { + previous=""; + n=1; + while IFS= read -r line; do + current="$line"; + if [[ -n "$previous" ]] && [[ "$previous" > "$current" ]]; then + yell "STATUS:Line $n is out of order: $line"; + fi; + previous="$current"; + ((n++)); + done < <(read_stdin || die "FATAL:No stdin."); +}; # main program +export -f read_stdin; + +main "$@"; + +# Author: Steven Baltakatei Sandoval +# License: GPLv3+