sync.rb

# Script to migrate from obsidian readwise to logseq readwise
# 1. Create a new logseq vault and sync your readwise content into it. Script assumes you are in this new folder.
# 2. Merge obsidian readwise content into new vault using this ruby file
# 3. Delete Readwise folder from obsidian vault
# 4. copy the pages files into your obsidian pages folder

# map of url => new filename
logseq_url_map = Dir["pages/*"].map do |page|
    [File.read(page)[/^\s*url:: (.*)$/, 1], page]
end.to_h
# map of full title => new filename
logseq_full_title_map = Dir["pages/*"].map do |page|
    [File.read(page)[/^\s*full-title:: (.*)$/, 1], page]
end.to_h
# map of new file name => title
logseq_new_title_map = Dir["pages/*"].map do |page|
    [page, File.read(page)[/^\s*title:: (.*)$/, 1]]
end.to_h

# iterate over old obsidian readwise files
Dir.glob("../Notes2.0/Readwise/**/*.md").each do |page|
    content = File.read(page)
    url = content[/^\s*URL:: (.*)$/, 1]
    full_title = content[/^\s*full title:: (.*)$/, 1]
    title = content[/^\s*title:: (.*)$/, 1]

    filename = nil
    # did we find a url? try to match by url
    if !url.nil?
        filename = logseq_url_map[url]
    end
    # url didnt work? did we find a title? try that
    if filename.nil? && !full_title.nil?
        filename = logseq_full_title_map[full_title]
    end
    if filename.nil?
        print "warn #{page} no match\n"
        next
    end
    # replace title with new title format
    content[title] = logseq_new_title_map[filename]
    
    # write obsidian readwise content onto new filename
    File.write(filename, content)
en