kicad: change from mysql to sqlite

kicad_lib.rb

@@ -7,15 +7,14 @@ https://docs.kicad.org/master/en/eeschema/eeschema.html#database_libraries
 this script creates views from the partdb table so to create a database for KiCAD
 if wil also output the KiCad database library file
 =end
-require 'mysql2'
+require 'sqlite3'
 require 'json'
 
-CREDENTIALS = "credentials.json"
-raise "database information #{CREDENTIALS} do not exist" unless File.file? CREDENTIALS
-credentials = {}
-JSON.parse(IO.read(CREDENTIALS)).each {|key,value| credentials[key.to_sym] = value}
-Mysql2::Client.default_query_options.merge!(:as => :hash)
-db = Mysql2::Client.new(credentials)
+# database file
+DB_PATH = "partdb.db"
+raise "DB file #{DB_PATH} does not exist" unless File.file? DB_PATH
+db = SQLite3::Database.new(DB_PATH)
+db.results_as_hash = true
 KICAD_FILE = "partdb.kicad_dbl"
 DEBUG = false # print debug information
 
@@ -25,7 +24,8 @@ prop2view = [{property: "kicad_symbol"}, {property: "kicad_footprint"}, {propert
 prop2view.each do |prop|
   puts prop[:property]
   prop[:table] = "part_" + prop[:property].downcase.gsub(/[- \/]/,"_")
-  view = "CREATE OR REPLACE VIEW #{prop[:table]} AS SELECT properties.part AS part, properties.value AS #{prop[:property]} FROM properties JOIN property ON property.id = properties.property WHERE property.name = '#{prop[:property]}'"
+  db.query("DROP VIEW IF EXISTS #{prop[:table]}")
+  view = "CREATE VIEW #{prop[:table]} AS SELECT properties.part AS part, properties.value AS #{prop[:property]} FROM properties JOIN property ON property.id = properties.property WHERE property.name = '#{prop[:property]}'"
   puts view if DEBUG
   db.query(view)
 end
@@ -37,7 +37,8 @@ dist2view = [{property: "LCSC"}, {property: "JLCPCB"}, {property: "DigiKey"}]
 dist2view.each do |prop|
   puts prop[:property]
   prop[:table] = "part_" + prop[:property].downcase.gsub(/[- \/]/,"_")
-  view = "CREATE OR REPLACE VIEW #{prop[:table]} AS SELECT distribution.part AS part, distribution.sku AS #{prop[:property]} FROM distribution JOIN distributor ON distributor.id = distribution.distributor WHERE distributor.name = '#{prop[:property]}'"
+  db.query("DROP VIEW IF EXISTS #{prop[:table]}")
+  view = "CREATE VIEW #{prop[:table]} AS SELECT distribution.part AS part, distribution.sku AS #{prop[:property]} FROM distribution JOIN distributor ON distributor.id = distribution.distributor WHERE distributor.name = '#{prop[:property]}'"
   puts view if DEBUG
   db.query(view)
 end
@@ -57,7 +58,8 @@ categories.uniq!
 categories.each do |category|
   puts category
   table = "kicad_lib_" + category.downcase.gsub(/[- \/]/,"_")
-  view = "CREATE OR REPLACE VIEW #{table} AS "
+  db.query("DROP VIEW IF EXISTS #{table}")
+  view = "CREATE VIEW #{table} AS "
   view += "SELECT part.id, part.name, part.description, "
   (prop2view + dist2view).each do |prop|
     view += "COALESCE(#{prop[:table]}1.#{prop[:property]},#{prop[:table]}2.#{prop[:property]}) AS #{prop[:property]}, "