File: squomp.sh 1 #!/bin/sh 2 3 # The MIT License (MIT) 4 # 5 # Copyright © 2020-2025 pacman64 6 # 7 # Permission is hereby granted, free of charge, to any person obtaining a copy 8 # of this software and associated documentation files (the “Software”), to deal 9 # in the Software without restriction, including without limitation the rights 10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 # copies of the Software, and to permit persons to whom the Software is 12 # furnished to do so, subject to the following conditions: 13 # 14 # The above copyright notice and this permission notice shall be included in 15 # all copies or substantial portions of the Software. 16 # 17 # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 # SOFTWARE. 24 25 26 # squomp [filepaths...] 27 # 28 # 29 # SQUeeze and stOMP, by ignoring leading spaces, trailing spaces, even runs 30 # of multiple spaces in the middle of lines, as well as trailing carriage 31 # returns, while also turning runs of empty lines into single empty lines, 32 # and ignoring leading/trailing empty lines, effectively also `squeezing` 33 # lines vertically. 34 # 35 # This script also ensures no lines across inputs are accidentally joined, 36 # since all lines it outputs end with line-feeds, even when the original files 37 # don't. 38 39 40 case "$1" in 41 -h|--h|-help|--help) 42 # show help message, using the info-comment from this very script 43 awk '/^# +squomp /, /^$/ { gsub(/^# ?/, ""); print }' "$0" 44 exit 0 45 ;; 46 esac 47 48 awk ' 49 FNR == 1 { 50 gsub(/^\xef\xbb\xbf/, "") 51 } 52 53 /^\r?$/ { 54 empty = 1 55 next 56 } 57 58 empty { 59 if (n > 0) print "" 60 empty = 0 61 } 62 63 { 64 gsub(/^ +| *\r?$/, "") 65 gsub(/ *\t */, "\t") 66 gsub(/ +/, " ") 67 print; fflush() 68 n++ 69 } 70 ' "$@"