X-Git-Url: https://git.openstreetmap.org/chef.git/blobdiff_plain/d8fc1ec5f984b7ab6a7886e054c9dd272d3678b1..5a75898a87099ed06d5ec5c52f7751689d102388:/cookbooks/tile/files/default/ruby/expire.rb

diff --git a/cookbooks/tile/files/default/ruby/expire.rb b/cookbooks/tile/files/default/ruby/expire.rb
deleted file mode 100755
index 917b75747..000000000
--- a/cookbooks/tile/files/default/ruby/expire.rb
+++ /dev/null
@@ -1,161 +0,0 @@
-#!/usr/bin/ruby
-
-require 'rubygems'
-require 'proj4'
-require 'xml/libxml'
-require 'set'
-require 'pg'
-require 'time'
-
-module Expire
-  # projection object to go from latlon -> spherical mercator
-  PROJ = Proj4::Projection.new(["+proj=merc", "+a=6378137", "+b=6378137", 
-                                "+lat_ts=0.0", "+lon_0=0.0", "+x_0=0.0",
-                                "+y_0=0", "+k=1.0", "+units=m", 
-                                "+nadgrids=@null", "+no_defs +over"])
-  
-  # width/height of the spherical mercator projection
-  SIZE=40075016.6855784
-  # the size of the meta tile blocks
-  METATILE = 8
-  # the directory root for meta tiles
-  HASH_ROOT = "/tiles/default/"
-  # database parameters
-  DBNAME="gis"
-  DBHOST=""
-  #DBPORT=5432
-  DBPORT=5432
-  DBTABLE="planet_osm_nodes"
-  
-  # turns a spherical mercator coord into a tile coord
-  def Expire.tile_from_merc(point, zoom)
-    # renormalise into unit space [0,1]
-    point.x = 0.5 + point.x / SIZE
-    point.y = 0.5 - point.y / SIZE
-    # transform into tile space
-    point.x = point.x * 2 ** zoom
-    point.y = point.y * 2 ** zoom
-    # chop of the fractional parts
-    [point.x.to_int, point.y.to_int, zoom]
-  end
-  
-  # turns a latlon -> tile x,y given a zoom level
-  def Expire.tile_from_latlon(latlon, zoom)
-    # first convert to spherical mercator
-    point = PROJ.forward(latlon)
-    tile_from_merc(point, zoom)
-  end
-  
-  # this must match the definition of xyz_to_meta in mod_tile
-  def Expire.xyz_to_meta(x, y, z)
-    # mask off the final few bits
-    x &= ~(METATILE - 1)
-    y &= ~(METATILE - 1)
-    # generate the path
-    hash_path = (0..4).collect { |i| 
-      (((x >> 4*i) & 0xf) << 4) | ((y >> 4*i) & 0xf) 
-    }.reverse.join('/')
-    z.to_s + '/' + hash_path + ".meta"
-  end
-  
-  # time to reset to, some very stupidly early time, before OSM started
-  EXPIRY_TIME = Time.parse("2000-01-01 00:00:00")
-
-  # expire the meta tile by setting the modified time back 
-  def Expire.expire_meta(meta)
-    puts "Expiring #{meta}"
-    File.utime(EXPIRY_TIME, EXPIRY_TIME, meta)
-  end
-  
-  def Expire.expire(change_file, min_zoom, max_zoom, tile_dirs)
-    do_expire(change_file, min_zoom, max_zoom) do |set|
-      new_set = Set.new
-      meta_set = Set.new
-
-      # turn all the tiles into expires, putting them in the set
-      # so that we don't expire things multiple times
-      set.each do |xy|
-        # this has to match the routine in mod_tile
-        meta = xyz_to_meta(HASH_ROOT, xy[0], xy[1], xy[2])
-
-        # check each style working out what needs expiring
-        tile_dirs.each do |tile_dir|
-          meta_set.add(tile_dir + "/" + meta) if File.exist?(tile_dir + "/" + meta)
-        end
-        
-        # add the parent into the set for the next round
-        new_set.add([xy[0] / 2, xy[1] / 2, xy[2] - 1])
-      end
-      
-      # expire all meta tiles
-      meta_set.each do |meta|
-        expire_meta(meta)
-      end
-
-      # return the new set, consisting of all the parents
-      new_set
-    end
-  end
-
-  def Expire.do_expire(change_file, min_zoom, max_zoom, &block)
-    # read in the osm change file
-    doc = XML::Document.file(change_file)
-    
-    # hash map to contain all the nodes
-    nodes = Hash.new
-    
-    # we put all the nodes into the hash, as it doesn't matter whether the node was
-    # added, deleted or modified - the tile will need updating anyway.
-    doc.find('//node').each do |node|
-      lat = node['lat'].to_f
-      if lat < -85
-        lat = -85
-      end
-      if lat > 85
-        lat = 85
-      end
-      point = Proj4::Point.new(Math::PI * node['lon'].to_f / 180, 
-                               Math::PI * lat / 180)
-      nodes[node['id'].to_i] = tile_from_latlon(point, max_zoom)
-    end
-    
-    # now we look for all the ways that have changed and put all of their nodes into
-    # the hash too. this will add too many nodes, as it is possible a long way will be
-    # changed at only a portion of its length. however, due to the non-local way that
-    # mapnik does text placement, it may stil not be enough.
-    #
-    # also, we miss cases where nodes are deleted from ways where that node is not 
-    # itself deleted and the coverage of the point set isn't enough to encompass the
-    # change.
-    conn = PG::Connection.new(:host => DBHOST, :port => DBPORT, :dbname => DBNAME)
-    doc.find('//way/nd').each do |node|
-      node_id = node['ref'].to_i
-      unless nodes.include? node_id
-        # this is a node referenced but not added, modified or deleted, so it should
-        # still be in the postgis DB.
-        res = conn.query("select lon, lat from #{DBTABLE} where id=#{node_id};")
-        
-        # loop over results, adding tiles to the change set
-        res.each do |row|
-          point = Proj4::Point.new(row[0].to_f / 100.0, row[1].to_f / 100.0)
-          nodes[node_id] = tile_from_merc(point, max_zoom)
-        end
-
-        # Discard results
-        res.clear
-      end
-    end
-    
-    # create a set of all the tiles at the maximum zoom level which are touched by 
-    # any of the nodes we've collected. we'll create the tiles at other zoom levels
-    # by a simple recursion.
-    set = Set.new nodes.values
-    
-    # expire tiles and shrink to the set of parents
-    (max_zoom).downto(min_zoom) do |z|
-      # allow the block to work on the set, returning the set at the next
-      # zoom level
-      set = yield set
-    end
-  end
-end