version info generation of diffast-api fixed

Author: codinuum

dune-project

@@ -4,6 +4,7 @@
 (using menhir 3.0)
 
 (name diffast)
+(version 0.1.1)
 
 (generate_opam_files true)
 (opam_file_location inside_opam_directory)

src/api/dune

@@ -12,7 +12,9 @@
  (rule
   (target v)
   (action
-   (with-stdout-to %{target} (run git describe --always --dirty))
+   (with-accepted-exit-codes (or 0 128)
+    (with-stdout-to %{target} (run git describe --always --dirty))
+   )
   )
  )
 )
@@ -25,10 +27,16 @@
 
 (rule
  (target v)
- (enabled_if (= %{read:pkg/v} ""))
+ (enabled_if (and (= %{read:pkg/v} "") (<> %{read:dev/v} "")))
  (action (write-file %{target} %{read-lines:dev/v}))
 )
 
+(rule
+ (target v)
+ (enabled_if (and (= %{read:pkg/v} "") (= %{read:dev/v} "")))
+ (action (write-file %{target} "unknown"))
+)
+
 (rule
  (target version.ml)
  (action