Add version info

.goreleaser.yml

@@ -2,10 +2,12 @@ builds:
   - id: importer
     binary: importer
     main: ./cmd/importer/main.go
+    hooks:
+      pre: ./tools/prep-release.sh
     goos:
       - darwin
       - linux
-      # - windows # Taking out Windows for now
+      - windows
     goarch:
       - amd64
 

VERSION.txt

@@ -0,0 +1 @@
+0.1.1

go.mod

@@ -1,8 +1,13 @@
 module github.com/upsidr/importer
 
-go 1.16
+go 1.17
 
 require (
 	github.com/google/go-cmp v0.5.5
 	github.com/spf13/cobra v1.2.1
 )
+
+require (
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+)

internal/cli/all.go

@@ -21,6 +21,7 @@ func Run(args []string) error {
 		updateCmd,
 		generateCliCmd,
 		purgeCliCmd,
+		versionCmd,
 	)
 	return cmd.Execute()
 }

internal/cli/version.go

@@ -0,0 +1,26 @@
+package cli
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"github.com/upsidr/importer/internal/version"
+)
+
+var (
+	versionCmd = &cobra.Command{
+		Aliases: []string{"v"},
+		Use:     "version",
+		Short:   "Print version information",
+		Run:     executeVersion,
+	}
+)
+
+func executeVersion(cmd *cobra.Command, args []string) {
+	// Suppress usage message after this point
+	cmd.SilenceUsage = true
+
+	v := version.GetVersion()
+	fmt.Println(v.VersionInfo())
+}

internal/version/VERSION.txt

@@ -0,0 +1 @@
+dev

internal/version/version.go

@@ -0,0 +1,54 @@
+package version
+
+import (
+	"embed"
+	"fmt"
+	"strings"
+)
+
+var (
+	//go:embed *.txt
+	versionData embed.FS
+
+	unknownVersion = &Version{
+		Version: "(version unknown)",
+	}
+)
+
+type Version struct {
+	Version          string
+	Revision         string
+	ReleaseCandidate string
+}
+
+func GetVersion() *Version {
+	base, err := versionData.ReadFile("VERSION.txt")
+	if err != nil {
+		return unknownVersion
+	}
+	v := &Version{
+		Version: string(base),
+	}
+
+	if rev, err := versionData.ReadFile("REVISION.txt"); err == nil {
+		v.Revision = strings.TrimSpace(string(rev))
+	}
+	if rc, err := versionData.ReadFile("RC.txt"); err == nil {
+		v.ReleaseCandidate = strings.TrimSpace(string(rc))
+	}
+
+	return v
+}
+
+func (v *Version) VersionInfo() string {
+	result := v.Version
+	if v.ReleaseCandidate != "" {
+		result = fmt.Sprintf("%s-%s", v.Version, v.ReleaseCandidate)
+	}
+
+	if v.Revision != "" {
+		result = result + " ( " + v.Revision + " )"
+	}
+
+	return result
+}

tools/prep-release.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+__root_dir=$(dirname "$0")/..
+
+# Fill in revision information
+git rev-parse --short HEAD >"$__root_dir"/internal/version/REVISION.txt
+
+# Copy the version info in the root dir
+cp "$__root_dir"/VERSION.txt "$__root_dir"/internal/version/VERSION.txt