version and releasing

.gitignore

@@ -1,4 +1,5 @@
 gpx
+dist/
 *.DS_Store
 
 # Compiled Object files, Static and Dynamic libs (Shared Objects)

Makefile

@@ -1,11 +1,25 @@
+BUILT := $(shell date -u '+%Y-%m-%d %I:%M:%S')
+TAG := $(shell git tag --points-at HEAD)
+COMMIT := $(shell git rev-parse --short HEAD)
+BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
+GO_VERSION := $(shell go version)
+LDFLAGS += -X "main.Built=$(BUILT)"
+LDFLAGS += -X "main.Commit=$(COMMIT)/$(TAG)"
+LDFLAGS += -X "main.Branch=$(BRANCH)"
+LDFLAGS += -X "main.GoVersion=$(GO_VERSION)"
+BUILD := go build -ldflags '$(LDFLAGS)'
+
 default: build
 
 setup:
 	@go get
 	@go install github.com/benbjohnson/ego/cmd/ego
 
 build: *.go ego.go
-	@go build
+	$(BUILD) .
+
+install: *.go *.ego
+	go install -ldflags '$(LDFLAGS)' .
 
 ego.go: *.ego
 	@ego
@@ -14,4 +28,19 @@ samples: build
 	@rm -f samples/out/*
 	@./gpx -o samples/out -vo 0 samples/in/*
 
-.PHONY: setup samples
+dist:
+	GOOS=darwin GOARCH=arm64 $(BUILD) -o dist/ .
+	tar zcf dist/gpx-osx-arm64.tgz -C dist/ gpx
+	GOOS=darwin GOARCH=amd64 $(BUILD) -o dist/ .
+	tar zcf dist/gpx-osx-amd64.tgz -C dist/ gpx
+	GOOS=linux GOARCH=arm64 $(BUILD) -o dist/ .
+	tar zcf dist/gpx-linux-arm64.tgz -C dist/ gpx
+	GOOS=linux GOARCH=amd64 $(BUILD) -o dist/ .
+	tar zcf dist/gpx-linux-amd64.tgz -C dist/ gpx
+	GOOS=windows GOARCH=amd64 $(BUILD) -o dist/ .
+	tar zcf dist/gpx-windows-amd64.tgz -C dist/ gpx.exe
+
+test:
+	@go test .
+
+.PHONY: setup samples dist test

main.go

@@ -4,14 +4,24 @@ package main
 import (
 	"flag"
 	"fmt"
+	"os"
 	"path/filepath"
 	"sort"
 	"time"
 
 	"github.com/tkrajina/gpxgo/gpx"
 )
 
+var (
+	// Build Parameters
+	Built     string // time built in UTC
+	Commit    string // source commit SHA
+	Branch    string // source branch
+	GoVersion string // Go version used to build
+)
+
 func main() {
+	// flags
 	out := flag.String("o", ".", "directory for generated files")
 	var offset *time.Duration
 	flag.Func("vo", "video time offset for subtitles file, positive offset means video starts ahead of the track", func(ts string) error {
@@ -22,13 +32,24 @@ func main() {
 		offset = &d
 		return nil
 	})
+	fVersion := flag.Bool("version", false, "print version information")
 	flag.Parse()
+
+	if *fVersion {
+		fmt.Println("built on " + Built)
+		fmt.Printf("built from %s@%s\n", Branch, Commit)
+		fmt.Println("built with " + GoVersion)
+		os.Exit(0)
+	}
+
+	// args
 	if len(flag.Args()) == 0 {
 		fmt.Println("Transforms specified gpx files into a gpx, svg and video subtitles files for individual race tracks")
 		fmt.Println("Usage: gpx [-o <dir>] [-vo <duration>] <files>")
 		flag.Usage()
 		return
 	}
+
 	var segments Segments
 	for _, fn := range flag.Args() {
 		g, err := gpx.ParseFile(fn)

segment_test.go

@@ -142,7 +142,7 @@ func Test_Split(t *testing.T) {
 	if err != nil {
 		t.Error(err)
 	}
-	ss := GetSegments(g)
+	ss := GetSegments(g, "")
 	if len(ss) != 1 {
 		t.Fail()
 	}