This gist converts your Dash Snippets to a Quiver Notebook. Assumes you Snippets.dash file is in the same directory and produces a Snippets.qvnotebook directory that can be imported into Quiver.

dash-to-quiver.rb

require "json"
require "sqlite3"
require "fileutils"

notebook_name = "Snippets.qvnotebook"
notebook_uuid = SecureRandom.uuid
FileUtils::mkdir_p(notebook_name)
notebook_meta = {
  name: "Imported from Dash",
  uuid: notebook_uuid
}
File.open("#{notebook_name}/meta.json", "w") { |f| f.puts notebook_meta.to_json }

db = SQLite3::Database.new("Snippets.dash")
db.execute("select sid, title, body, syntax from snippets") do |note_row|
  tags = []
  db.execute("select t.tag from tags t, tagsIndex ti where t.tid = ti.tid AND ti.sid = ?", note_row.first) do |tag_row|
    tags << tag_row.first
  end
  note_syntax = case note_row[3]
  when "Shell"
    "sh"
  else
    note_row[3].downcase
  end
  note_uuid = SecureRandom.uuid
  FileUtils::mkdir_p("#{notebook_name}/#{note_uuid}.qvnote")
  note_meta = {
    created_at: Time.now.to_i,
    updated_at: Time.now.to_i,
    tags: tags,
    title: note_row[1],
    uuid: note_uuid
  }
  File.open("#{notebook_name}/#{note_uuid}.qvnote/meta.json", "w") { |f| f.puts note_meta.to_json }

  note_content = {
    title: note_row[1],
    cells: [
      {
        type: "code",
        language: note_syntax,
        data: note_row[2]
      }
    ]
  }
  File.open("#{notebook_name}/#{note_uuid}.qvnote/content.json", "w") { |f| f.puts note_content.to_json }
end