From: Steven Baltakatei Sandoval Date: Mon, 15 Jul 2024 23:33:54 +0000 (+0000) Subject: feat(user/zeropad.sh):Remove unnecessary leading zeroes X-Git-Url: https://zdv2.bktei.com/gitweb/BK-2020-03.git/commitdiff_plain/0564bc200e84856a1ab37483439bad0900b00552?ds=sidebyside feat(user/zeropad.sh):Remove unnecessary leading zeroes --- diff --git a/user/zeropad.sh b/user/zeropad.sh index b9b032b..242b30b 100755 --- a/user/zeropad.sh +++ b/user/zeropad.sh @@ -4,7 +4,7 @@ # Example: zeropad.sh; # zeropad.sh ".jpg"; # Input: arg1 str file extension of files to apply changes to -# Version: 0.1.1 +# Version: 0.2.0 declare fext; # file extension @@ -20,31 +20,55 @@ list_files() { | grep -E -- "${fext}$" ; fi; }; # list pwd file basenames +remove_leading_zeroes() { + # Desc: Removes leading zeroes from lines + # Input: stdin + # Output: stdout + # Depends: BK-2020-03 read_stdin() + # Version: 0.0.1 + while read -r line; do + printf "%s\n" "$line" | sed -E -e 's/(^0*)([0-9].*)/\2/'; + done; +}; +get_max_digits() { + # Desc: Returns max leading digits of pwd filenames + # Depends: list_files() + # BK-2020-03: remove_leading_zeroes() + # GNU sed 4.8 + # GNU awk 5.1.0 + local output; + + # Find the maximum number of leading digits in the filenames of working dir + output="$(list_files | remove_leading_zeroes \ + | awk '{ match($0, /^[0-9]+/); if (RLENGTH > max) max=RLENGTH } END { print max }' )"; + # declare -p max_digits; # debug + printf "%s" "$output"; +}; # return max digits to stdout main () { # Read file extension if provided if [[ -n "$1" ]]; then fext="$1"; fi; - # Find the maximum number of leading digits in the filenames of working dir - max_digits="$(list_files | sed -e 's/[^0-9].*//' | awk '{ if(length > L) L=length } END { print L }')"; - # declare -p max_digits; # debug + max_digits="$(get_max_digits)"; # Loop over the files and rename them while read -r file; do + # Skip files with no leading digits re='^[0-9]+'; if [[ ! "$file" =~ $re ]]; then continue; fi; # Extract the leading digits - digits="$(echo "$file" | sed 's/\([0-9]*\).*/\1/')"; + digits="$(echo "$file" | sed -E 's/([0-9]*).*/\1/')"; # all leading digits + digits_nlz="$(echo "$digits" | remove_leading_zeroes)"; # no leading zeroes # Zero-pad the digits - padded_digits="$(printf "%0${max_digits}d" "$digits")"; + padded_digits="$(printf "%0${max_digits}d" "$digits_nlz")"; # Construct the new filename new_file="${padded_digits}${file#${digits}}"; # Rename the file if [[ "$file" == "$new_file" ]]; then continue; fi; - mv -n "$file" "$new_file" - # declare -p file new_file; # debug + mv -n "$file" "$new_file"; + #declare -p max_digits file digits digits_nlz padded_digits new_file # debug done < <(list_files); }; # main program