select in Finder front Window from terminal, can add more to the already selected.

selectinfinder.rb

#!/usr/bin/env ruby
#
# 2024-12-17
#   To gist
# 2016-07-25
# 2023-07-29
#   Fixed many mistakes if not all.  It simply adds the new items to the
#   already selected on Finder
# inspired on
# http://www.red-sweater.com/AppleScript/
#
# 2024-01-06
#   Added strip to the args… yes I know, there can be spaces sometimes
#   it helps in terminal after blibros triple click selecting lines
#
# Use:
#   On Terminal do:
#     selectinfinder.rb *pattern*
#   so a list of glob expanded item names in the directory is produced
#       This files are added to the selected ones in the top most window only when both
#   coincide (the window for the first arg and the window with the previously selected items)
#
#     selectinfinder.rb - *pattern*
#
#   does not add
#

# Limitations:
#   It only only selects items in one directory/window, the path for the first one
#   Because of the way finder selection is handled (I thing) no directories can
#   be added



$añade = true
$progn=File.basename($0)

theFinderPath=%x{osascript -e '
tell application "Finder"
  try
    get the POSIX path of (folder of the front window as string)
  on error
    get the POSIX path of (path to desktop folder as string)
  end try
end tell'
}.chomp
Dir.chdir theFinderPath
puts "Front window: #{theFinderPath}"
pattern = []
if ARGV.length>0 then
    ARGV.each do |it0|
        it = it0.strip
        if it == '-h'
            puts <<~END
            #$progn [-] '*.cpp' 'adir/*.py'
                with - it doesn't add but directly selects files
            END
            return 0
        elsif it == '-' then
            $añade = false
        else
            puts "Globbing: #{Dir.pwd}/#{it}"
            pattern += Dir.glob(it)
        end
    end
end
puts "Files to select: #{pattern}"
return if pattern.length == 0



pattern.map! {|d|  (d =~ /^\//)? d : File.join(theFinderPath,d.sub(/^\.\//, ""))}

if $añade then
    alreadySelectedItems = %x{osascript <<-END
        set AppleScript's text item delimiters to ":"
        set selectedItems to {}
        tell application "Finder"
            set selectedItems to selection
        end tell
        set allPaths to {}
        repeat with bob in selectedItems
        set end of allPaths to "/" & POSIX path of (bob as alias)
        end repeat
        allPaths
END}
    puts "There was: #{alreadySelectedItems}"
    allPaths = alreadySelectedItems.chomp.split(/, \//) + pattern
else
    allPaths = pattern
end

puts "There will be: #{allPaths.join ', '}"

allPaths.map! {|x| %Q{posix file "#{x}"} }

allPathString = allPaths.join ", "
puts
puts "allPathString: #{allPathString}"
puts

%x{osascript -e 'tell application "Finder" to activate'}
%x{osascript <<-END
    tell application "Finder" to select { #{allPathString} }
END}