Updated filename script to work with or without Zettelkasten ID

insert_filename_as_header.rb

#!/usr/bin/ruby
#
# Inserts the file's name as the first header in the file, if it isn't already there.
# Original file saved as filename.bak.
#
# As always, caveat emptor. This code could harm your files, so try it on a backup.
#
Dir.glob('*.md') do |filename|
  puts "working on: #{filename}"
  id_text = nil
  line_cnt = 0
  should_add = false
  title = filename.chomp('.md')

  File.open('temp.txt', 'w') do |temp|

    File.foreach(filename) do |line|
      line_cnt += 1 #increment line count
      if line_cnt == 1 #if we're evaluating first line
        if line !~ /^# #{title}[ ]*$/ #if first line does NOT match title
          temp.puts("# " + title + "\n\n") #then put it there
        end
      end
      temp.puts(line)
    end

  end
  File.rename(filename, filename + '.bak')
  File.rename('temp.txt', filename)
end

make_links_numeric_alpha.sh

#!/bin/bash
#
# Converts links in files from [[20200207151300]] A sample link
# to [[20200207151300 A sample link]]
# Original files saved as filename.bak.
#
# As always, caveat emptor. This code could harm your files, so try it on a backup.
#

sed -i.bak -E 's/\[\[([0-9]{14})\]\] (.+)/\[\[\1 \2\]\]/' *.md

make_links_numeric_only.sh

#!/bin/bash
#
# Converts links in files from [[20200207151300 A sample link]] to
# [[20200207151300]] A sample link
# Original files saved as filename.bak.
#
# As always, caveat emptor. This code could harm your files, so try it on a backup.
#

sed -i.bak -E 's/\[\[([0-9]{14}) (.+)\]\]/\[\[\1\]\] \2/' *.md