1 files changed, 62 insertions, 0 deletions
diff --git a/Win64Depends.sh b/Win64Depends.sh
new file mode 100644
index 0000000..17f8995
--- /dev/null
+++ b/Win64Depends.sh
@@ -0,0 +1,62 @@
+#!/bin/sh -e
+# Win64Depends.sh: download dependencies from MSYS2 for cross-compilation.
+# Dependencies: AWK, sed, sha256sum, cURL, bsdtar
+repository=https://repo.msys2.org/mingw/mingw64/
+
+status() {
+	echo "$(tput bold)-- $*$(tput sgr0)"
+}
+
+dbsync() {
+	status Fetching repository DB
+	[ -f db.tsv ] || curl -# "$repository/mingw64.db" | bsdtar -xOf- | awk '
+		function flush() { print f["%NAME%"] f["%FILENAME%"] f["%DEPENDS%"] }
+		NR > 1 && $0 == "%FILENAME%" { flush(); for (i in f) delete f[i] }
+		!/^[^%]/ { field = $0; next } { f[field] = f[field] $0 "\t" }
+		field == "%SHA256SUM%" { path = "*packages/" f["%FILENAME%"]
+			sub(/\t$/, "", path); print $0, path > "db.sums" } END { flush() }
+	' > db.tsv
+}
+
+fetch() {
+	status Resolving "$@"
+	mkdir -p packages
+	awk -F'\t' 'function get(name,    i, a) {
+		if (visited[name]++ || !(name in filenames)) return
+		print filenames[name]; split(deps[name], a); for (i in a) get(a[i])
+	} BEGIN { while ((getline < "db.tsv") > 0) {
+		filenames[$1] = $2; deps[$1] = ""; for (i = 3; i <= NF; i++) {
+			gsub(/[<=>].*/, "", $i); deps[$1] = deps[$1] $i FS }
+	} for (i = 0; i < ARGC; i++) get(ARGV[i]) }' "$@" | tee db.want | \
+	while IFS= read -r name
+	do
+		status Fetching "$name"
+		[ -f "packages/$name" ] || curl -#o "packages/$name" "$repository/$name"
+	done
+}
+
+verify() {
+	status Verifying checksums
+	sha256sum --ignore-missing --quiet -c db.sums
+}
+
+extract() {
+	status Extracting packages
+	for subdir in *
+	do [ -d "$subdir" -a "$subdir" != packages ] && rm -rf -- "$subdir"
+	done
+	while IFS= read -r name
+	do bsdtar -xf "packages/$name" --strip-components 1
+	done < db.want
+}
+
+# This directory name matches the prefix in .pc files, so we don't need to
+# modify them (pkgconf has --prefix-variable, but CMake can't pass that option).
+mkdir -p mingw64
+cd mingw64
+dbsync
+fetch mingw-w64-x86_64-hidapi mingw-w64-x86_64-libusb
+verify
+extract
+
+status Success