read version from build info if version was not injected at build time (go install)

inject version from tag at build time for local builds

CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
--   --version/-v option. See [VersionFlag](https://github.com/onyx-and-iris/gobs-cli?tab=readme-ov-file#versionflag)
+-   --version/-v option. See [Flags](https://github.com/onyx-and-iris/gobs-cli?tab=readme-ov-file#flags)
 
 ### Changed
 

README.md

@@ -14,10 +14,16 @@ go install github.com/onyx-and-iris/gobs-cli@latest
 
 #### Flags
 
-Pass `--host`, `--port` and `--password` as flags to the root command, for example:
+-   --host/-H: Websocket host
+-   --port/-P Websocket port
+-   --password/-p: Websocket password
+-   --timeout/-T: Websocket timeout
+-   --version/-v: Print the gobs-cli version
+
+Pass `--host`, `--port` and `--password` as flags on the root command, for example:
 
 ```console
-gobs-cli --host=localhost --port=4455 --password=<websocket password> --help
+gobs-cli --host localhost --port 4455 --password 'websocket password' --help
 ```
 
 #### Environment Variables
@@ -37,14 +43,6 @@ OBS_TIMEOUT=5
 
 ## Commands
 
-### VersionFlag
-
--   --version/-v: Print gobs-cli version information and quit
-
-```console
-gobs-cli --version
-```
-
 ### ObsVersionCmd
 
 -   Print OBS client and websocket version.

Taskfile.yaml

@@ -7,6 +7,8 @@ vars:
   PROGRAM: gobs-cli
   SHELL: '{{if eq .OS "Windows_NT"}}powershell{{end}}'
   BIN_DIR: bin
+  VERSION:
+    sh: 'git describe --tags $(git rev-list --tags --max-count=1)'
 
 tasks:
   default:
@@ -35,13 +37,13 @@ tasks:
   build-windows:
     desc: Build the gobs-cli project for Windows
     cmds:
-      - GOOS=windows GOARCH=amd64 go build -ldflags "-X 'main.version=debug'" -o {{.BIN_DIR}}/{{.PROGRAM}}_windows_amd64.exe
+      - GOOS=windows GOARCH=amd64 go build -ldflags "-X 'main.version={{.VERSION}}'" -o {{.BIN_DIR}}/{{.PROGRAM}}_windows_amd64.exe
     internal: true
 
   build-linux:
     desc: Build the gobs-cli project for Linux
     cmds:
-      - GOOS=linux GOARCH=amd64 go build -ldflags "-X 'main.version=debug'" -o {{.BIN_DIR}}/{{.PROGRAM}}_linux_amd64
+      - GOOS=linux GOARCH=amd64 go build -ldflags "-X 'main.version={{.VERSION}}'" -o {{.BIN_DIR}}/{{.PROGRAM}}_linux_amd64
     internal: true
 
   test:

main.go

@@ -18,10 +18,10 @@ import (
 
 // ObsConfig holds the configuration for connecting to the OBS WebSocket server.
 type ObsConfig struct {
-	Host     string `flag:"host"     help:"Host to connect to."          default:"localhost" env:"OBS_HOST"`
+	Host     string `flag:"host"     help:"Host to connect to."          default:"localhost" env:"OBS_HOST"     short:"H"`
-	Port     int    `flag:"port"     help:"Port to connect to."          default:"4455"      env:"OBS_PORT"`
+	Port     int    `flag:"port"     help:"Port to connect to."          default:"4455"      env:"OBS_PORT"     short:"P"`
-	Password string `flag:"password" help:"Password for authentication." default:""          env:"OBS_PASSWORD"`
+	Password string `flag:"password" help:"Password for authentication." default:""          env:"OBS_PASSWORD" short:"p"`
-	Timeout  int    `flag:"timeout"  help:"Timeout in seconds."          default:"5"         env:"OBS_TIMEOUT"`
+	Timeout  int    `flag:"timeout"  help:"Timeout in seconds."          default:"5"         env:"OBS_TIMEOUT"  short:"T"`
 }
 
 // CLI is the main command line interface structure.

version.go

@@ -2,11 +2,13 @@ package main
 
 import (
 	"fmt"
+	"runtime/debug"
+	"strings"
 
 	"github.com/alecthomas/kong"
 )
 
-var version = "unknown"
+var version string
 
 // VersionFlag is a custom flag type for displaying version information.
 type VersionFlag string
@@ -18,8 +20,16 @@ func (v VersionFlag) Decode(_ *kong.DecodeContext) error { return nil }
 func (v VersionFlag) IsBool() bool { return true }
 
 // BeforeApply implements the kong.Flag interface for VersionFlag.
-func (v VersionFlag) BeforeApply(app *kong.Kong, _ kong.Vars) error {
+func (v VersionFlag) BeforeApply(app *kong.Kong, _ kong.Vars) error { // nolint: unparam
-	fmt.Println(version)
+	if version == "" {
+		info, ok := debug.ReadBuildInfo()
+		if !ok {
+			return fmt.Errorf("failed to read build info")
+		}
+		version = strings.Split(info.Main.Version, "-")[0]
+	}
+
+	fmt.Printf("gobs-cli version: %s\n", version)
 	app.Exit(0) // Exit the application after printing the version
 	return nil
 }