Fix new rubocop warnings

app/controllers/api/amf_controller.rb

@@ -114,18 +114,18 @@ module Api
 
     def amf_handle_error(call, rootobj, rootid)
       yield
-    rescue OSM::APIAlreadyDeletedError => ex
-      [-4, ex.object, ex.object_id]
-    rescue OSM::APIVersionMismatchError => ex
-      [-3, [rootobj, rootid], [ex.type.downcase, ex.id, ex.latest]]
-    rescue OSM::APIUserChangesetMismatchError => ex
-      [-2, ex.to_s]
-    rescue OSM::APIBadBoundingBox => ex
-      [-2, "Sorry - I can't get the map for that area. The server said: #{ex}"]
-    rescue OSM::APIError => ex
-      [-1, ex.to_s]
-    rescue StandardError => ex
-      [-2, "An unusual error happened (in #{call}). The server said: #{ex}"]
+    rescue OSM::APIAlreadyDeletedError => e
+      [-4, e.object, e.object_id]
+    rescue OSM::APIVersionMismatchError => e
+      [-3, [rootobj, rootid], [e.type.downcase, e.id, e.latest]]
+    rescue OSM::APIUserChangesetMismatchError => e
+      [-2, e.to_s]
+    rescue OSM::APIBadBoundingBox => e
+      [-2, "Sorry - I can't get the map for that area. The server said: #{e}"]
+    rescue OSM::APIError => e
+      [-1, e.to_s]
+    rescue StandardError => e
+      [-2, "An unusual error happened (in #{call}). The server said: #{e}"]
     end
 
     def amf_handle_error_with_timeout(call, rootobj, rootid)

app/controllers/api/changesets_controller.rb

@@ -364,10 +364,10 @@ module Api
       end
       # stupid Time seems to throw both of these for bad parsing, so
       # we have to catch both and ensure the correct code path is taken.
-    rescue ArgumentError => ex
-      raise OSM::APIBadUserInput, ex.message.to_s
-    rescue RuntimeError => ex
-      raise OSM::APIBadUserInput, ex.message.to_s
+    rescue ArgumentError => e
+      raise OSM::APIBadUserInput, e.message.to_s
+    rescue RuntimeError => e
+      raise OSM::APIBadUserInput, e.message.to_s
     end
 
     ##

app/controllers/api/map_controller.rb

@@ -22,8 +22,8 @@ module Api
         bbox = BoundingBox.from_bbox_params(params)
         bbox.check_boundaries
         bbox.check_size
-      rescue StandardError => err
-        report_error(err.message)
+      rescue StandardError => e
+        report_error(e.message)
         return
       end
 

app/controllers/api/tracepoints_controller.rb

@@ -25,8 +25,8 @@ module Api
         bbox = BoundingBox.from_bbox_params(params)
         bbox.check_boundaries
         bbox.check_size
-      rescue StandardError => err
-        report_error(err.message)
+      rescue StandardError => e
+        report_error(e.message)
         return
       end
 

app/controllers/application_controller.rb

@@ -37,8 +37,8 @@ class ApplicationController < ActionController::Base
     elsif session[:token]
       session[:user] = current_user.id if self.current_user = User.authenticate(:token => session[:token])
     end
-  rescue StandardError => ex
-    logger.info("Exception authorizing user: #{ex}")
+  rescue StandardError => e
+    logger.info("Exception authorizing user: #{e}")
     reset_session
     self.current_user = nil
   end
@@ -185,22 +185,22 @@ class ApplicationController < ActionController::Base
 
   def api_call_handle_error
     yield
-  rescue ActiveRecord::RecordNotFound => ex
+  rescue ActiveRecord::RecordNotFound => e
     head :not_found
-  rescue LibXML::XML::Error, ArgumentError => ex
-    report_error ex.message, :bad_request
-  rescue ActiveRecord::RecordInvalid => ex
-    message = "#{ex.record.class} #{ex.record.id}: "
-    ex.record.errors.each { |attr, msg| message << "#{attr}: #{msg} (#{ex.record[attr].inspect})" }
+  rescue LibXML::XML::Error, ArgumentError => e
+    report_error e.message, :bad_request
+  rescue ActiveRecord::RecordInvalid => e
+    message = "#{e.record.class} #{e.record.id}: "
+    e.record.errors.each { |attr, msg| message << "#{attr}: #{msg} (#{e.record[attr].inspect})" }
     report_error message, :bad_request
-  rescue OSM::APIError => ex
-    report_error ex.message, ex.status
-  rescue AbstractController::ActionNotFound => ex
+  rescue OSM::APIError => e
+    report_error e.message, e.status
+  rescue AbstractController::ActionNotFound => e
     raise
-  rescue StandardError => ex
-    logger.info("API threw unexpected #{ex.class} exception: #{ex.message}")
-    ex.backtrace.each { |l| logger.info(l) }
-    report_error "#{ex.class}: #{ex.message}", :internal_server_error
+  rescue StandardError => e
+    logger.info("API threw unexpected #{e.class} exception: #{e.message}")
+    e.backtrace.each { |l| logger.info(l) }
+    report_error "#{e.class}: #{e.message}", :internal_server_error
   end
 
   ##
@@ -227,11 +227,11 @@ class ApplicationController < ActionController::Base
     OSM::Timer.timeout(Settings.web_timeout, Timeout::Error) do
       yield
     end
-  rescue ActionView::Template::Error => ex
-    ex = ex.cause
+  rescue ActionView::Template::Error => e
+    e = e.cause
 
-    if ex.is_a?(Timeout::Error) ||
-       (ex.is_a?(ActiveRecord::StatementInvalid) && ex.message =~ /execution expired/)
+    if e.is_a?(Timeout::Error) ||
+       (e.is_a?(ActiveRecord::StatementInvalid) && e.message =~ /execution expired/)
       render :action => "timeout"
     else
       raise

app/controllers/geocoder_controller.rb

@@ -98,8 +98,8 @@ class GeocoderController < ApplicationController
     end
 
     render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting geocoder.ca: #{ex}"
+  rescue StandardError => e
+    @error = "Error contacting geocoder.ca: #{e}"
     render :action => "error"
   end
 
@@ -166,8 +166,8 @@ class GeocoderController < ApplicationController
     end
 
     render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
+  rescue StandardError => e
+    @error = "Error contacting nominatim.openstreetmap.org: #{e}"
     render :action => "error"
   end
 
@@ -198,8 +198,8 @@ class GeocoderController < ApplicationController
     end
 
     render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting api.geonames.org: #{ex}"
+  rescue StandardError => e
+    @error = "Error contacting api.geonames.org: #{e}"
     render :action => "error"
   end
 
@@ -230,8 +230,8 @@ class GeocoderController < ApplicationController
     end
 
     render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting nominatim.openstreetmap.org: #{ex}"
+  rescue StandardError => e
+    @error = "Error contacting nominatim.openstreetmap.org: #{e}"
     render :action => "error"
   end
 
@@ -261,8 +261,8 @@ class GeocoderController < ApplicationController
     end
 
     render :action => "results"
-  rescue StandardError => ex
-    @error = "Error contacting api.geonames.org: #{ex}"
+  rescue StandardError => e
+    @error = "Error contacting api.geonames.org: #{e}"
     render :action => "error"
   end
 

app/controllers/traces_controller.rb

@@ -113,8 +113,8 @@ class TracesController < ApplicationController
       begin
         @trace = do_create(params[:trace][:gpx_file], params[:trace][:tagstring],
                            params[:trace][:description], params[:trace][:visibility])
-      rescue StandardError => ex
-        logger.debug ex
+      rescue StandardError => e
+        logger.debug e
       end
 
       if @trace.id