File order in archive will be baked into metadata of extracted files

archive-order-to-metadata.sh

#!/bin/bash

# https://github.com/aonez/Keka/issues/932#issuecomment-989762514
# By Matt Sephton @gingerbeardman 2021-12-11
# - Created all versions til then
# By @porg 2021-12-16
# + Hiding file extension on all extracted files
# + Setting creation and modification date of output directory

# Dependencies: p7zip, pipx, osxmetadata, SetFile (ships with Xcode)

# $ brew install p7zip
# $ brew install pipx
# $ pipx install osxmetadata
# $ xcode-select --install
# Check your PATH and confirm operation

# Get base of filename
BASE=$(basename "$1" .zip)

# Get files in zip order, use 7z to respect character encodings
FILES=$(7z l -slt -ba "$1" | grep "Path" | sed 's/Path \= //g;')

# Prepare timestamps
DATESTAMP=$(date -r "$1")
UNIXSTAMP=$(date -jf "%a %b %d %T %Z %Y" "$DATESTAMP" +"%s")
TOUCHSTAMP=$(date -jf "%s" "$UNIXSTAMP" +"%Y%m%d%H%M.%S")
CREATIONSTAMP=$(date -jf "%s" "$UNIXSTAMP" +"%m/%d/%Y %H:%M:%S")
YYYYMMDDhhmmss=$(date -jf "%s" "$UNIXSTAMP" +"%Y-%m-%d %H:%M:%S")

# Unzip and only show interesting lines of output
7z x "$1" -aoa -o"$BASE" | grep "[th]ing"

# Set counters
COUNTER=1

# Info on archive

echo "Files in archive:   $(echo "$FILES" | wc -l | tr -d "[:blank:]" )"
echo "Archive mod-date:   $YYYYMMDDhhmmss"
echo


## Loop through file list

echo "File order in archive will be baked into metadata of extracted files:"
echo "- Finder comment gets sequence number."
echo "- Timestamps will be created artificially:"
echo "  - First file in archive gets same mod-date as archive."
echo "  - Next file will be one second older than the previous file."
echo "  - Mod-dates will also be written to creation-dates for ultimate persistence."
echo
echo "Extracting files..."
echo
echo "Nr\tUnix Date\tYYYY-MM-DD hh:mm:ss\tFile"
echo

echo "$FILES" | while read f
do
  # Show progress
  
  CREATIONSTAMP=$(date -jf "%s" "$UNIXSTAMP" +"%m/%d/%Y %H:%M:%S")
  YYYYMMDDhhmmss=$(date -jf "%s" "$UNIXSTAMP" +"%Y-%m-%d %H:%M:%S")

  echo "$COUNTER\t$UNIXSTAMP\t$YYYYMMDDhhmmss\t$f"
  
  # Encode archive order into metadata

  # Finder comment
  osxmetadata -s findercomment "$COUNTER" "$BASE/$f"
  # Date created, date modified, hide extension
  SetFile -d "$CREATIONSTAMP" -m "$CREATIONSTAMP" -a E "$BASE/$f"	
  # touch -t $TOUCHSTAMP "$BASE/$f"	# Date modified
  

  # Adapt counters
  COUNTER=$((COUNTER+1)) # No zero padding necessary. Finder sorts correctly.
  UNIXSTAMP=$((UNIXSTAMP-1)) # Decrement b/c Finder icon view sorting by date is descending only
done

# Set artificial dates on extraction folder too
SetFile -d "$CREATIONSTAMP" -m "$CREATIONSTAMP" "$BASE/"

echo "\nSetting creation and modification date of output directory...\n"
echo "/\t$UNIXSTAMP\t$YYYYMMDDhhmmss\t$BASE/\n"

echo