Adopt GOPATH

GOPATH is annoying, but the Go community pushing me to adopt it is even
more annoying.

1 files changed, 25 insertions, 4 deletions

diff --git a/Makefile b/Makefile
index e1c53c5..bef7edf 100644
--- a/Makefile
+++ b/Makefile
@@ -5,18 +5,39 @@ BINDIR ?= $(PREFIX)/bin
 ifeq ($(shell go env GOOS),linux)
 ifeq ($(wildcard .git),)
 $(error Do not build this for Linux. Instead use the Linux kernel module. See wireguard.com/install/ for more info.)
+else
+$(shell printf 'package main\nconst UseTheKernelModuleInstead = 0xdeadbabe\n' > ireallywantobuildon_linux.go)
 endif
 endif
 
 all: wireguard-go
 
-wireguard-go: $(wildcard *.go) $(wildcard */*.go)
-	go build -v -o $@
+export GOPATH := $(CURDIR)/.gopath
+export PATH := $(PATH):$(CURDIR)/.gopath/bin
+GO_IMPORT_PATH := git.zx2c4.com/wireguard-go
+
+.gopath/.created:
+	rm -rf .gopath
+	mkdir -p $(dir .gopath/src/$(GO_IMPORT_PATH))
+	ln -s ../../.. .gopath/src/$(GO_IMPORT_PATH)
+	touch $@
+
+vendor/.created: Gopkg.toml Gopkg.lock .gopath/.created
+	command -v dep >/dev/null || go get -v github.com/golang/dep/cmd/dep
+	cd .gopath/src/$(GO_IMPORT_PATH) && dep ensure -vendor-only -v
+	touch $@
+
+wireguard-go: $(wildcard *.go) $(wildcard */*.go) .gopath/.created vendor/.created
+	go build $(GO_BUILD_EXTRA_ARGS) -v $(GO_IMPORT_PATH)
 
 install: wireguard-go
-	@install -v -d "$(DESTDIR)$(BINDIR)" && install -m 0755 -v wireguard-go "$(DESTDIR)$(BINDIR)/wireguard-go"
+	@install -v -d "$(DESTDIR)$(BINDIR)" && install -v -m 0755 wireguard-go "$(DESTDIR)$(BINDIR)/wireguard-go"
 
 clean:
 	rm -f wireguard-go
 
-.PHONY: clean install
+update-dep:
+	command -v dep >/dev/null || go get -v github.com/golang/dep/cmd/dep
+	cd .gopath/src/$(GO_IMPORT_PATH) && dep ensure -update -v
+
+.PHONY: clean install update-dep