WIP: use gox for cross platform compiling

.travis.yml

@@ -1,4 +1,33 @@
 language: go
-
+sudo: false
 go:
-  - 1.15.x
+  - tip # Latest go version
+
+before_install:
+  # gox simplifies building for multiple architectures
+  - go get github.com/mitchellh/gox
+
+install:
+  - # skip
+
+script:
+  - go get -t -v ./...
+  - diff -u <(echo -n) <(gofmt -d .)
+  - go vet $(go list ./... | grep -v /vendor/)
+  - gox -cgo -os="linux" -arch="amd64 arm arm64" -output="dist/{{.Dir}}_{{.OS}}_{{.Arch}}" -ldflags "-X main.Version=`git rev-parse --short HEAD`" -verbose ./...
+
+deploy:
+  provider: releases
+  skip_cleanup: true # Important, otherwise the build output would be purged.
+  api_key:
+    # *encrypted* GitHub key, as the output of the Travis CI CLI tool
+    secure: TODO...
+  file:
+    - dist/wg-portal_linux_amd64
+    - dist/wg-portal_linux_arm64
+    - dist/wg-portal_linux_arm
+    - dist/wg-portal.env
+    - dist/wg-portal.service
+  on:
+    repo: h44z/wg-portal
+    tags: true # The deployment happens only if the commit has a tag.

Makefile

@@ -10,15 +10,14 @@ IMAGE=h44z/wg-portal
 
 all: dep build
 
-build: dep $(addsuffix -amd64,$(addprefix $(BUILDDIR)/,$(BINARIES)))
-	cp scripts/wg-portal.service $(BUILDDIR)
-	cp scripts/wg-portal.env $(BUILDDIR)
-
-build-cross-plat: dep build $(addsuffix -arm,$(addprefix $(BUILDDIR)/,$(BINARIES))) $(addsuffix -arm64,$(addprefix $(BUILDDIR)/,$(BINARIES)))
+build: dep
+	mkdir -p $(BUILDDIR)
 	cp scripts/wg-portal.service $(BUILDDIR)
 	cp scripts/wg-portal.env $(BUILDDIR)
+	gox -cgo -os="linux" -arch="amd64 arm arm64" -output="dist/{{.Dir}}_{{.OS}}_{{.Arch}}" -ldflags "-X main.Version=`git rev-parse --short HEAD`" -verbose ./...
 
 dep:
+	$(GOCMD) get github.com/mitchellh/gox
 	$(GOCMD) mod download
 
 validate: dep

cmd/wg-portal/main.go

@@ -12,13 +12,15 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+var Version string = "unknown (local build)"
+
 func main() {
 	_ = setupLogger(logrus.StandardLogger())
 
 	c := make(chan os.Signal, 1)
 	signal.Notify(c, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
 
-	logrus.Infof("Starting WireGuard Portal Server...")
+	logrus.Infof("Starting WireGuard Portal Server [%s]...", Version)
 
 	// Context for clean shutdown
 	ctx, cancel := context.WithCancel(context.Background())

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/jordan-wright/email v4.0.1-0.20200917010138-e1c00e156980+incompatible
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/milosgajdos/tenus v0.0.3
+	github.com/mitchellh/gox v1.0.1 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.7.0
 	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e