add gpkg samples

II/Referatas/Makefile

@@ -1,2 +1,30 @@
-mj-referatas.pdf: $(shell git ls-files .)
-	latexmk -g -pdf mj-referatas.tex
+SHELL = /bin/bash
+
+GEN = zeimena.pdf st-simplify-100.pdf st-simplify-150.pdf st-simplify-300.pdf st-simplify-500.pdf
+
+mj-referatas.pdf: mj-referatas.tex version.tex bib.bib zeimena-pretty.pdf $(GEN)
+	latexmk -g -pdf $<
+
+zeimena.pdf: zeimena.gpkg
+	./layer2img.py --infile=$< --size=74x52 --outfile $@
+
+st-simplify-%.pdf: db/.faux_st-simplify-%
+	./layer2img.py --table=douglas_$* --size=74x52 --outfile $@
+
+db/.faux_st-simplify-%: db/.faux_ready st-simplify.sql
+	. ./managedb ; \
+		psql --echo-all -v ON_ERROR_STOP=1 -v tolerance=$* -f st-simplify.sql
+	touch $@
+
+db/.faux_ready: zeimena.gpkg managedb
+	-./managedb stop; rm -fr db
+	./managedb init
+	ogr2ogr -f PostgreSQL "PG:host=127.0.0.1 user=osm dbname=osm" zeimena.gpkg
+	touch $@
+
+GIT_DIR = $(shell git rev-parse --show-toplevel)/.git
+
+version.tex: $(shell git ls-files .) $(GIT_DIR)
+	date "+%F %T %Z" | awk '{print "\\gdef\\GeneratedAt{"$$0"}%"}' > $@
+	[ -n "$$(git status --porcelain)" ] && suffix="-dirty"; \
+		git describe --tags | awk '{print "\\gdef\\VCDescribe{"$$0"'$$suffix'}%"}' >> $@