feat: Starting to parse the version.

cmd/root.go

@@ -23,6 +23,7 @@ package cmd
 
 import (
 	"errors"
+	"fmt"
 	"log/slog"
 	"os"
 	"path"
@@ -41,10 +42,11 @@ const (
 	versionMajor VersionSegment = iota
 	versionMinor
 	versionPatch
-	versionPre
 	versionAlpha
 	versionBeta
+	versionGamma
 	versionRC
+	versionPre
 )
 
 var (
@@ -55,21 +57,18 @@ var (
 
 // rootCmd represents the base command when called without any subcommands
 var rootCmd = &cobra.Command{
-	Use:   "git-next-tag",
-	Short: "A brief description of your application",
-	Long: `A longer description that spans multiple lines and likely contains
-examples and usage of using your application. For example:
-
-Cobra is a CLI library for Go that empowers applications.
-This application is a tool to generate the needed files
-to quickly create a Cobra application.`,
+	Use:     "git next-tag",
+	Version: FullVersion(),
+	Short:   "Commit the next tag.",
+	Long:    `...`,
 	PreRunE: func(cmd *cobra.Command, args []string) error { return initConfig() },
 	RunE:    func(cmd *cobra.Command, args []string) error { return nextTag(cmd, args) },
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {
+	fmt.Println(Version())
 	err := rootCmd.Execute()
 	if err != nil {
 		os.Exit(1)
@@ -81,9 +80,9 @@ func init() {
 	// Cobra supports persistent flags, which, if defined here,
 	// will be global for your application.
 
-	rootCmd.Flags().Bool("major", false, "Increment major")
-	rootCmd.Flags().Bool("minor", false, "Increment minor")
-	rootCmd.Flags().Bool("patch", false, "Increment patch")
+	rootCmd.Flags().Bool("major", false, "Increment major version")
+	rootCmd.Flags().Bool("minor", false, "Increment minor version")
+	rootCmd.Flags().Bool("patch", false, "Increment patch version")
 }
 
 // initConfig reads in config file and ENV variables if set.
@@ -115,9 +114,10 @@ func initConfig() error {
 
 	// If a config file is found, read it in.
 	if err := viper.ReadInConfig(); err == nil {
-		slog.Debug("Using config file:", viper.ConfigFileUsed())
+		slog.Debug("Using config file:" + viper.ConfigFileUsed())
 	} else {
 		// Initialize the file.
+		// TODO: Make this a 'question and answer' bit
 		viper.Set("initial_v", true)
 		viper.Set("tag_annotated", true)
 		viper.Set("version_files", []string{})

cmd/version.go

@@ -0,0 +1,85 @@
+/*
+Copyright © 2023 Curtis Jewell <golang@curtisjewell.name>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+package cmd
+
+import (
+	"fmt"
+	"regexp"
+	"runtime/debug"
+)
+
+// From https://icinga.com/blog/2022/05/25/embedding-git-commit-information-in-go-binaries/,
+// altered to the use case.
+
+// commit is the commit hash
+// uncommitted is whether there were other uncommitted changes when built
+// FullCommit is the full commit string.
+var commit, uncommitted, FullCommit = func() (string, bool, string) {
+	commit := ""
+	modified := false
+	commitInfo := ""
+	if info, ok := debug.ReadBuildInfo(); ok {
+		for _, setting := range info.Settings {
+			switch setting.Key {
+			case "vcs.revision":
+				commit = setting.Value
+			case "vcs.modified":
+				if setting.Value == "true" {
+					modified = true
+					commitInfo = " + uncommitted changes"
+				}
+			}
+		}
+	}
+	if commit == "" {
+		return "unknown", false, " status - not built from repository"
+	}
+	return commit, modified, fmt.Sprint(commit, commitInfo)
+}()
+
+// version is the
+var version = func() string { return "v0.0.0+pre" }()
+
+var rxVersion *regexp.Regexp
+
+func init() {
+	rxVersion, _ = regexp.Compile(`v?(\d+)[.](\d+)[.](\d+)(?:-(alpha|beta|gamma|rc)[.](\d+))?(?:[+](pre))?`)
+}
+
+// FullVersion returns the version, including git status.
+func FullVersion() string {
+	v := version
+	matches := rxVersion.FindStringSubmatch(v)
+	if len(matches) > 0 && matches[6] == "pre" {
+		v += fmt.Sprintf(" (snapshot: %s)", FullCommit)
+	}
+	return v
+}
+
+// Version returns the base version.
+func Version() string {
+	return version
+}
+
+// TODO
+// struct ParsedVersion {}
+// func GetParsedVersion() *ParsedVersion {}