Add the '--version' command-line option

Author: Guillaume Petiot

Diff for: CHANGES.md

@@ -1,5 +1,9 @@
 ## unreleased
 
+### Added
+
+- Add the `--version` command-line option (#<PR_NUMBER>, @gpetiot)
+
 ### Changed
 
 - Replace exceptions by result types for the requests (#11, @gpetiot)

Diff for: bin/dune

@@ -2,4 +2,4 @@
  (name main)
  (public_name get-activity)
  (package get-activity)
- (libraries cmdliner get-activity-lib))
+ (libraries cmdliner dune-build-info get-activity-lib))

Diff for: bin/main.ml

@@ -68,7 +68,12 @@ let period =
   in
   Term.(const f $ from $ to_ $ last_week)
 
-let info = Cmd.info "get-activity"
+let version =
+  match Build_info.V1.version () with
+  | None -> "dev"
+  | Some v -> Build_info.V1.Version.to_string v
+
+let info = Cmd.info "get-activity" ~version
 
 let run period : unit =
   match mode with

Diff for: dune-project

@@ -10,6 +10,7 @@
  (synopsis "Collect activity as markdown")
  (depends
   (cmdliner (>= 1.1.1))
+  dune-build-info
   (get-activity-lib (= :version))))
 
 (package

Diff for: get-activity.opam

@@ -8,6 +8,7 @@ bug-reports: "https://github.com/tarides/get-activity/issues"
 depends: [
   "dune" {>= "2.8"}
   "cmdliner" {>= "1.1.1"}
+  "dune-build-info"
   "get-activity-lib" {= version}
   "odoc" {with-doc}
 ]