Support building on Windows

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
         os: [ubuntu-latest, macos-latest]
         version: ['Release', 'Debug']
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install dependencies (Ubuntu)
         if: runner.os == 'Linux'
         run: sudo apt-get install libsqlite3-dev
@@ -19,3 +19,27 @@ jobs:
         run: brew install sqlite3
       - run: uname -a; BUILDTYPE=${{ matrix.version }} make
       - run: make test
+
+  test-windows:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        version: ['Release', 'Debug']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: msys2/setup-msys2@v2
+        with:
+          update: true
+          install: >-
+            mingw-w64-x86_64-toolchain
+            mingw-w64-x86_64-sqlite3
+      - shell: msys2 {0}
+        #run: uname -a; BUILDTYPE=${{ matrix.version }} mingw32-make CXXFLAGS="-static-libgcc -static-libstdc++"
+        run: uname -a; BUILDTYPE=${{ matrix.version }} mingw32-make
+      - name: Upload binary artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: tippecanoe-binary
+          path: ./tippecanoe.exe
+      - shell: msys2 {0}
+        run: mingw32-make test

Makefile

@@ -16,6 +16,14 @@ RELEASE_FLAGS := -O3 -DNDEBUG
 DEBUG_FLAGS := -O0 -DDEBUG -fno-inline-functions -fno-omit-frame-pointer
 
 
+# Determine the null device based on the operating system
+ifeq ($(OS),Windows_NT)
+    NULL_DEVICE := /dev/null
+else
+    NULL_DEVICE := /dev/null
+endif
+
+
 OS := $(shell uname -s)
 ifeq ($(OS),FreeBSD)
 ADVSHELL = /usr/local/bin/bash
@@ -121,7 +129,7 @@ testargs = \
                             $(subst _, ,$(1))))))))
 
 %.json.check:
-	./tippecanoe -q -a@ -f -o [email protected] $(call testargs,$(patsubst %.json.check,%,$(word 4,$(subst /, ,$@)))) $(foreach suffix,$(suffixes),$(sort $(wildcard $(subst $(SPACE),/,$(wordlist 1,2,$(subst /, ,$@)))/*.$(suffix)))) < /dev/null
+	./tippecanoe -q -a@ -f -o [email protected] $(call testargs,$(patsubst %.json.check,%,$(word 4,$(subst /, ,$@)))) $(foreach suffix,$(suffixes),$(sort $(wildcard $(subst $(SPACE),/,$(wordlist 1,2,$(subst /, ,$@)))/*.$(suffix)))) < $(NULL_DEVICE)
 	./tippecanoe-decode -x generator [email protected] > [email protected]
 	cmp [email protected] $(patsubst %.check,%,$@)
 	rm [email protected] [email protected]
@@ -138,7 +146,7 @@ fewer-tests: tippecanoe tippecanoe-decode geobuf-test raw-tiles-test parallel-te
 %.json.checkbuf:
 	for i in $(wildcard $(subst $(SPACE),/,$(wordlist 1,2,$(subst /, ,$@)))/*.json); do ./tippecanoe-json-tool -w $$i | ./node_modules/geobuf/bin/json2geobuf > $$i.geobuf; done
 	for i in $(wildcard $(subst $(SPACE),/,$(wordlist 1,2,$(subst /, ,$@)))/*.json.gz); do gzip -dc $$i | ./tippecanoe-json-tool -w | ./node_modules/geobuf/bin/json2geobuf > $$i.geobuf; done
-	./tippecanoe -q -a@ -f -o [email protected] $(call testargs,$(patsubst %.json.checkbuf,%,$(word 4,$(subst /, ,$@)))) $(foreach suffix,$(suffixes),$(addsuffix .geobuf,$(sort $(wildcard $(subst $(SPACE),/,$(wordlist 1,2,$(subst /, ,$@)))/*.$(suffix))))) < /dev/null
+	./tippecanoe -q -a@ -f -o [email protected] $(call testargs,$(patsubst %.json.checkbuf,%,$(word 4,$(subst /, ,$@)))) $(foreach suffix,$(suffixes),$(addsuffix .geobuf,$(sort $(wildcard $(subst $(SPACE),/,$(wordlist 1,2,$(subst /, ,$@)))/*.$(suffix))))) < $(NULL_DEVICE)
 	./tippecanoe-decode -x generator [email protected] | sed 's/checkbuf/check/g' | sed 's/\.geobuf//g' > [email protected]
 	cmp [email protected] $(patsubst %.checkbuf,%,$@)
 	rm [email protected] [email protected]
@@ -156,7 +164,7 @@ parallel-test: $(eval SHELL:=$(ADVSHELL))
 	cat tests/parallel/in[1234].json | ./tippecanoe -q -z5 -f -pi -l test -n test -o tests/parallel/linear-pipe.mbtiles
 	cat tests/parallel/in[1234].json | ./tippecanoe -q -z5 -f -pi -l test -n test -P -o tests/parallel/parallel-pipe.mbtiles
 	cat tests/parallel/in[1234].json | sed 's/^/@/' | tr '@' '\036' | ./tippecanoe -q -z5 -f -pi -l test -n test -o tests/parallel/implicit-pipe.mbtiles
-	./tippecanoe -q -z5 -f -pi -l test -n test -P -o tests/parallel/parallel-pipes.mbtiles <(cat tests/parallel/in1.json) <(cat tests/parallel/empty1.json) <(cat tests/parallel/empty2.json) <(cat tests/parallel/in2.json) /dev/null <(cat tests/parallel/in3.json) <(cat tests/parallel/in4.json)
+	./tippecanoe -q -z5 -f -pi -l test -n test -P -o tests/parallel/parallel-pipes.mbtiles <(cat tests/parallel/in1.json) <(cat tests/parallel/empty1.json) <(cat tests/parallel/empty2.json) <(cat tests/parallel/in2.json) $(NULL_DEVICE) <(cat tests/parallel/in3.json) <(cat tests/parallel/in4.json)
 	./tippecanoe-decode -x generator -x generator_options tests/parallel/linear-file.mbtiles > tests/parallel/linear-file.json
 	./tippecanoe-decode -x generator -x generator_options tests/parallel/parallel-file.mbtiles > tests/parallel/parallel-file.json
 	./tippecanoe-decode -x generator -x generator_options tests/parallel/linear-pipe.mbtiles > tests/parallel/linear-pipe.json
@@ -303,7 +311,7 @@ overzoom-test: tippecanoe-overzoom
 	rm tests/pbf/13-1310-3166-8-30.pbf tests/pbf/13-1310-3166-8-30.pbf.json.check
 	# No features in child tile
 	./tippecanoe-overzoom -o tests/pbf/14-2616-6331.pbf tests/pbf/11-327-791.pbf 11/327/791 14/2616/6331
-	cmp tests/pbf/14-2616-6331.pbf /dev/null
+	cmp tests/pbf/14-2616-6331.pbf $(NULL_DEVICE)
 	rm tests/pbf/14-2616-6331.pbf
 	# Thinning
 	# 243 features in the source tile tests/pbf/0-0-0-pop.pbf

decode.cpp

@@ -13,7 +13,11 @@
 #include <fcntl.h>
 #include <dirent.h>
 #include <sys/stat.h>
+#ifdef _WIN32
+#include "mman.h"
+#else
 #include <sys/mman.h>
+#endif
 #include <protozero/pbf_reader.hpp>
 #include "mvt.hpp"
 #include "projection.hpp"
@@ -25,6 +29,10 @@
 #include "pmtiles_file.hpp"
 #include "errors.hpp"
 
+#ifdef _WIN32
+#include "win32_hacks.hpp"
+#endif
+
 int minzoom = 0;
 int maxzoom = 32;
 bool force = false;

dirtiles.cpp

@@ -10,6 +10,9 @@
 #include <limits.h>
 #include <sys/stat.h>
 #include <sqlite3.h>
+#ifdef _WIN32
+#include <direct.h>
+#endif
 #include "jsonpull/jsonpull.h"
 #include "mbtiles.hpp"
 #include "dirtiles.hpp"
@@ -28,16 +31,28 @@ std::string dir_read_tile(std::string base, struct zxy tile) {
 void dir_write_tile(const char *outdir, int z, int tx, int ty, std::string const &pbf) {
 	// Don't check mkdir error returns, since most of these calls to
 	// mkdir will be creating directories that already exist.
+	#ifndef _WIN32
 	mkdir(outdir, S_IRWXU | S_IRWXG | S_IRWXO);
+	#else
+	_mkdir(outdir);
+	#endif
 
 	std::string curdir(outdir);
 	std::string slash("/");
 
 	std::string newdir = curdir + slash + std::to_string(z);
+	#ifndef _WIN32
 	mkdir(newdir.c_str(), S_IRWXU | S_IRWXG | S_IRWXO);
+	#else
+	_mkdir(newdir.c_str());
+	#endif
 
 	newdir = newdir + "/" + std::to_string(tx);
+	#ifndef _WIN32
 	mkdir(newdir.c_str(), S_IRWXU | S_IRWXG | S_IRWXO);
+	#else
+	_mkdir(newdir.c_str());
+	#endif
 
 	newdir = newdir + "/" + std::to_string(ty) + ".pbf";
 
@@ -87,7 +102,11 @@ static bool pbfname(const char *s) {
 void check_dir(const char *dir, char **argv, bool force, bool forcetable) {
 	struct stat st;
 
+	#ifndef _WIN32
 	mkdir(dir, S_IRWXU | S_IRWXG | S_IRWXO);
+	#else
+	_mkdir(dir);
+	#endif
 	std::string meta = std::string(dir) + "/" + "metadata.json";
 	if (force) {
 		unlink(meta.c_str());  // error OK since it may not exist;

geojson.cpp

@@ -9,14 +9,20 @@
 #include <unistd.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#ifdef _WIN32
+#include "mman.h"
+#else
 #include <sys/mman.h>
+#endif
 #include <fcntl.h>
 #include <ctype.h>
 #include <errno.h>
 #include <limits.h>
 #include <sqlite3.h>
 #include <stdarg.h>
+#ifndef _WIN32
 #include <sys/resource.h>
+#endif
 #include <pthread.h>
 #include <vector>
 #include <algorithm>

geometry.cpp

@@ -6,6 +6,9 @@
 #include <algorithm>
 #include <cstdio>
 #include <unistd.h>
+#ifdef _WIN32
+#define _USE_MATH_DEFINES
+#endif
 #include <cmath>
 #include <limits.h>
 #include <sqlite3.h>