cmd/jarink: add "version" command

The version command print the version of the program.

3 files changed, 9 insertions, 1 deletions

diff --git a/README b/README
index 3d4b14d..02debe8 100644
--- a/README
+++ b/README
@@ -9,10 +9,11 @@ and maintains their website.
 
         jarink [OPTIONS] <COMMAND> <args...>
 
-Available command,
+Available commands,
 
         brokenlinks - scan the website for broken links (page and images).
         help        - print the usage of the command.
+        version     - print the version of program.
 
 == Usage
 
diff --git a/cmd/jarink/main.go b/cmd/jarink/main.go
index 88361ea..afd1dbd 100644
--- a/cmd/jarink/main.go
+++ b/cmd/jarink/main.go
@@ -77,6 +77,10 @@ func main() {
 		log.Println(jarink.GoEmbedReadme)
 		return
 
+	case `version`:
+		log.Println(jarink.Version)
+		return
+
 	default:
 		log.Printf(`Missing or invalid command %q`, cmd)
 	}
diff --git a/jarink.go b/jarink.go
index 13f0cd7..d1a1fd3 100644
--- a/jarink.go
+++ b/jarink.go
@@ -7,6 +7,9 @@ import (
 	_ "embed"
 )
 
+// Version of jarink program and module.
+var Version = `0.2.0`
+
 // GoEmbedReadme embed the README for showing the usage of program.
 //
 //go:embed README