Add --version via dune rule

src/bin/cli.ml

@@ -2,11 +2,18 @@ open Cmdliner
 open Trace
 open Cli_helpers
 
+let version =
+  Format.asprintf
+    "Rolling release\nHash: %s\nDate: %s\nCI job id: %s"
+    Version.hash
+    Version.commit_date
+    Version.job_id
+
 let main =
   let man =
     [ `S "MORE HELP";
       `P "Use `$(mname) $(i,COMMAND) --help' for help on a single command." ] in
-  (Term.(ret (const (`Help (`Auto, None)))), Term.info "ligo" ~man)
+  (Term.(ret (const (`Help (`Auto, None)))), Term.info "ligo" ~version ~man)
 
 let source_file n =
   let open Arg in

src/bin/dune

@@ -5,13 +5,20 @@
     cmdliner
     ligo
   )
-  (modules cli cli_helpers)
+  (modules cli cli_helpers version)
   (preprocess
     (pps ppx_let)
   )
   (flags (:standard -open Simple_utils))
 )
 
+(rule
+ (targets version.ml)
+ (action (with-stdout-to
+          version.ml
+          (run "sh" "-c"
+               "printf 'let hash = \"%s\"\nlet commit_date = \"%s\"\nlet job_id = \"%s\"\n' \"$(git rev-parse HEAD)\" \"$(git show --no-patch --format=%ci)\" \"${CI_JOB_ID}\""))))
+
 (executable
   (name runligo)
   (public_name ligo)