Add support for Garmin

backend/Makefile

@@ -125,5 +125,7 @@ $(WEBAPP_DIR)/%.json: $(TOPOJSON_DIR)/%.json
 
 webapp: $(WEBAPP_DIR)/municipalities.json $(WEBAPP_DIR)/limits_IT_regions.json $(WEBAPP_DIR)/limits_IT_provinces.json
 
+include garmin.mk
+
 clean:
 	rm -rf $(WORK_DIR)

backend/garmin.mk

@@ -0,0 +1,101 @@
+# Makefile based on https://github.com/lucadelu/ital.img by Luca Delucchi
+
+MKGMAP_URL ?= https://www.mkgmap.org.uk/download/mkgmap-r4917.tar.gz
+MKGMAP_DIR = $(WORK_DIR)/mkgmap
+MKGMAP = $(MKGMAP_DIR)/mkgmap.jar
+MKGMAP_XMX = 8G
+MKGMAP_PRIORITY = 10
+SPLITTER_URL ?= https://www.mkgmap.org.uk/download/splitter-r653.jar
+SPLITTER = $(MKGMAP_DIR)/splitter.jar
+SEA_URL = https://www.thkukuk.de/osm/data/sea-latest.zip
+SEA_DIR = $(MKGMAP_DIR)/sea
+SEA = $(SEA_DIR)/.dirstamp
+BOUNDS_URL = https://www.thkukuk.de/osm/data/bounds-latest.zip
+BOUNDS_DIR = $(MKGMAP_DIR)/bounds
+BOUNDS = $(BOUNDS_DIR)/.dirstamp
+
+REPO_URL = https://github.com/lucadelu/ital.img.git
+REPO_DIR = $(MKGMAP_DIR)/ital.img
+REPO = $(REPO_DIR)/.git/HEAD
+STYLES = styles/.directory
+STYLES_DIR = $(REPO_DIR)/$(dir $(STYLES))
+
+NATION = $(notdir $(patsubst %/,%,$COUNTRY))
+
+.PHONY: setup_garmin garmin_regioni
+
+$(MKGMAP):
+	$(dir_guard)
+	curl -s "$(MKGMAP_URL)" | bsdtar --strip-components 1 -xf- -C "$(MKGMAP_DIR)"
+
+$(SPLITTER): $(MKGMAP)
+	curl -s "$(SPLITTER_URL)" -o "$@"
+
+$(SEA):
+	$(dir_guard)
+	curl -s "$(SEA_URL)" | bsdtar --strip-components 1 -xf- -C "$(SEA_DIR)"
+	touch $@
+
+$(BOUNDS):
+	$(dir_guard)
+	curl -s "$(BOUNDS_URL)" | bsdtar -xf- -C "$(BOUNDS_DIR)"
+	touch $@
+
+$(REPO):
+	cd $(dir $(REPO_DIR)) && git clone -n --depth=1 --filter=tree:0 $(REPO_URL) $(notdir $(REPO_DIR))
+
+$(STYLES): $(REPO)
+	cd $(REPO_DIR) && git sparse-checkout set --no-cone $(dir $(STYLES))
+	cd $(REPO_DIR) && git checkout
+
+setup_garmin: $(MKGMAP) $(SPLITTER) $(SEA) $(BOUNDS) $(STYLES)
+setup: setup_garmin
+
+PBF_FILES_REGIONI = $(wildcard $(PBF_DIR)/regioni/*.osm.pbf)
+garmin_regioni: $(subst /pbf/,/garmin/,$(PBF_FILES_REGIONI:.osm.pbf=.tar.gz))
+all: garmin_regioni
+
+.NOTPARALLEL:
+.ONESHELL:
+$(OUTPUT)/garmin/%.tar.gz: $(PBF_DIR)/%.osm.pbf
+	$(dir_guard)
+	set -eux
+	area_id=$(basename $@ .tar)
+	area_name="${area_id#*_}"
+	trap "rm -rf "$@".temp/" EXIT
+	java -Xmx"$(MKGMAP_XMX)" -jar "$(SPLITTER)" \
+		--max-areas=4096 --max-nodes=3000000 --wanted-admin-level=8 \
+		--output-dir="$@".temp/ "$<"
+	java -Xmx"$(MKGMAP_XMX)" -jar "$(MKGMAP)" \
+		--style-file="$(STYLES_DIR)/general" \
+		--latin1 \
+		--country-name=Italia \
+		--country-abbr="$(NATION)" \
+		--region-name="$(area_name)" \
+		--area-name="$(area_name)" \
+		--family-name="Mappe regionali ital.img" \
+		--description="$(area_name)" \
+		--precomp-sea="$(SEA_DIR)" \
+		--generate-sea \
+		--bounds="$(BOUNDS_DIR)" \
+		--max-jobs \
+		--route \
+		--drive-on=detect,right \
+		--process-destination \
+		--process-exits \
+		--location-autofill=is_in,nearest \
+		--index \
+		--split-name-index \
+		--housenumbers \
+		--add-pois-to-areas \
+		--link-pois-to-ways \
+		--preserve-element-order \
+		--verbose \
+		--name-tag-list=name,name:it,loc_name,reg_name,nat_name \
+		--draw-priority="$(MKGMAP_PRIORITY)" \
+		--reduce-point-density=3.2 \
+		--make-opposite-cycleways \
+		--gmapsupp \
+		--output-dir="$@".temp/ \
+		"$@".temp/*.osm.pbf
+	tar -czf "$@" "$@".temp/gmapsupp.img

backend/scripts/topojson.sh

@@ -25,7 +25,8 @@ select json_object(
                 'adm', admin_level,
                 '.osm.pbf', 'pbf/regioni/' || filename || '.osm.pbf',
                 '.gpkg', 'gpkg/regioni/' || filename || '.gpkg',
-                '.obf', 'obf/regioni/' || filename || '.obf'
+                '.obf', 'obf/regioni/' || filename || '.obf',
+                '.tar.gz', 'garmin/regioni/' || filename || '.tar.gz'
              )
          ))
        )

shell.nix

@@ -31,6 +31,8 @@ pkgs.mkShellNoCC {
     # mapshaper and topojson
     nodePackages.npm
     nodejs-slim_21
+    # garmin styles
+    git
   ];
   shellHook = ''
     export LD_LIBRARY_PATH="${lib-path}"