Merge pull request #5 from github/cross-compile

Support cross-compiling

Author: mhagger

Makefile

@@ -7,9 +7,12 @@ GO := $(CURDIR)/script/go
 GOFMT := $(CURDIR)/script/gofmt
 
 GOFLAGS := \
-	--tags "static" \
 	-ldflags "-X main.BuildVersion=$(shell git rev-parse HEAD) -X main.BuildDescribe=$(shell git describe --tags --always --dirty)"
 
+ifdef USE_ISATTY
+GOFLAGS := $(GOFLAGS) --tags isatty
+endif
+
 GO_SRCS := $(shell cd $(GOPATH)/src/$(PACKAGE) && $(GO) list -f '{{$$ip := .ImportPath}}{{range .GoFiles}}{{printf ".gopath/src/%s/%s\n" $$ip .}}{{end}}{{range .CgoFiles}}{{printf ".gopath/src/%s/%s\n" $$ip .}}{{end}}{{range .TestGoFiles}}{{printf ".gopath/src/%s/%s\n" $$ip .}}{{end}}{{range .XTestGoFiles}}{{printf ".gopath/src/%s/%s\n" $$ip .}}{{end}}' ./...)
 
 .PHONY: all
@@ -20,6 +23,38 @@ bin/git-sizer:
 	mkdir -p bin
 	$(GO) build $(GOFLAGS) -o $@ $(PACKAGE)
 
+# Cross-compile for a bunch of common platforms. Note that this
+# doesn't work with USE_ISATTY:
+.PHONY: common-platforms
+common-platforms: \
+	bin/git-sizer-linux-amd64 \
+	bin/git-sizer-linux-386 \
+	bin/git-sizer-darwin-amd64 \
+	bin/git-sizer-darwin-386 \
+	bin/git-sizer-windows-amd64.exe \
+	bin/git-sizer-windows-386.exe
+
+# Define rules for a bunch of common platforms that are supported by go; see
+#     https://golang.org/doc/install/source#environment
+# You can compile for any other platform in that list by running
+#     make GOOS=foo GOARCH=bar
+
+define PLATFORM_template =
+.PHONY: bin/git-sizer-$(1)-$(2)$(3)
+bin/git-sizer-$(1)-$(2)$(3):
+	mkdir -p bin
+	GOOS=$(1) GOARCH=$(2) $$(GO) build $$(GOFLAGS) -o $$@ $$(PACKAGE)
+endef
+
+$(eval $(call PLATFORM_template,linux,amd64))
+$(eval $(call PLATFORM_template,linux,386))
+
+$(eval $(call PLATFORM_template,darwin,386))
+$(eval $(call PLATFORM_template,darwin,amd64))
+
+$(eval $(call PLATFORM_template,windows,amd64,.exe))
+$(eval $(call PLATFORM_template,windows,386,.exe))
+
 .PHONY: test
 test: bin/git-sizer gotest
 

isatty/isatty_disabled.go

@@ -0,0 +1,7 @@
+// +build !isatty
+
+package isatty
+
+func Isatty(fd uintptr) (bool, error) {
+	return true, nil
+}

isatty/isatty.go renamed to isatty/isatty_enabled.go

@@ -1,3 +1,5 @@
+// +build isatty
+
 package isatty
 
 /*