added build and version

Author: enrichman

.gitignore

@@ -1,2 +1,3 @@
 *.bin
 out
+build

README.md

@@ -14,3 +14,32 @@ To install from source clone the project and run
 ```bash
 go install ./...
 ```
+
+## Usage
+
+To download a TEK export run `gaen download` with a supported app (`immuni` or `swisscovid`, at the moment):
+
+```
+gaen download immuni
+```
+
+This will download the export in a `out/immuni/xxx` folder.
+
+Then you can decode the export running
+
+```
+gaen decode out/immuni/xxx/export.bin
+```
+
+and this will output the first TEK with the first RPI:
+
+```
+TEK: [+KYwhAsB9QEq0PvaJfo4+Q==] - [F8 A6 30 84 B 1 F5 1 2A D0 FB DA 25 FA 38 F9]
+
+RPI:
+{
+        "id": "q7WZAsXPgkuE+BEiadwLPQ==",
+        "id_bytes": "AB B5 99 2 C5 CF 82 4B 84 F8 11 22 69 DC B 3D",
+        "interval": "2020-10-03T02:00:00+02:00"
+}
+```

build.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+VERSION=$(git describe --tags)
+ARCH=amd64
+
+for OS in linux darwin windows;
+do
+    GOARCH=${ARCH} GOOS=${OS} go build -ldflags "-X main.version=${VERSION}" -o build/gaen-${VERSION}-${OS}-${ARCH} .
+done

go.sum

@@ -57,6 +57,7 @@ github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgf
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=

main.go

@@ -6,12 +6,13 @@ import (
 	"fmt"
 	"gaen/export"
 	"io/ioutil"
-	"strings"
 
 	"github.com/spf13/cobra"
 	"google.golang.org/protobuf/proto"
 )
 
+var version = "0.0.0-dev"
+
 var rootCmd = &cobra.Command{
 	Use:   "gaen",
 	Short: "gaen is a cli to interact with the Google Apple Exposure Notification",
@@ -21,7 +22,7 @@ var versionCmd = &cobra.Command{
 	Use:   "version",
 	Short: "Print the gaen version number",
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Println("Print: " + strings.Join(args, " "))
+		fmt.Println("gaen version " + version)
 	},
 }