Generate multiple parallelizable SQL files (#839)

Generate multiple SQL files to be imported in parallel.
The files will respect the cross-layer dependencies,
so they can be all ingested at the same time.

Makefile

@@ -88,7 +88,7 @@ help:
 
 .PHONY: init-dirs
 init-dirs:
-	@mkdir -p build
+	@mkdir -p build/sql
 	@mkdir -p data
 	@mkdir -p cache
 
@@ -101,7 +101,7 @@ build/mapping.yaml: init-dirs
 
 .PHONY: build-sql
 build-sql: init-dirs
-	$(DOCKER_COMPOSE) run $(DC_OPTS) openmaptiles-tools generate-sql openmaptiles.yaml > build/tileset.sql
+	$(DOCKER_COMPOSE) run $(DC_OPTS) openmaptiles-tools generate-sql openmaptiles.yaml --dir ./build/sql
 
 .PHONY: clean
 clean:

docker-compose.yml

@@ -41,7 +41,7 @@ services:
     volumes:
       - .:/tileset
       - ./data:/import
-      - ./build:/sql
+      - ./build/sql:/sql
       - ./build:/mapping
       - ./cache:/cache
 

quickstart.sh

@@ -201,7 +201,7 @@ make clean
 
 echo " "
 echo "-------------------------------------------------------------------------------------"
-echo "====> : Code generating from the layer definitions ( ./build/mapping.yaml; ./build/tileset.sql )"
+echo "====> : Code generating from the layer definitions ( ./build/mapping.yaml; ./build/sql/* )"
 echo "      : The tool source code: https://github.com/openmaptiles/openmaptiles-tools "
 echo "      : But we generate the tm2source, Imposm mappings and SQL functions from the layer definitions! "
 make all