Implements NimblePkgVersion define. Fixes #625.

tests/nimbleVersionDefine/nimbleVersionDefine.nimble

@@ -0,0 +1,14 @@
+# Package
+
+version       = "0.1.0"
+author        = "Dominik Picheta"
+description   = "A new awesome nimble package"
+license       = "MIT"
+srcDir        = "src"
+bin           = @["nimbleVersionDefine"]
+
+
+
+# Dependencies
+
+requires "nim >= 0.16.0"

tests/nimbleVersionDefine/src/nimbleVersionDefine.nim

@@ -0,0 +1,3 @@
+when isMainModule:
+  const NimblePkgVersion {.strdefine.} = "Unknown"
+  echo(NimblePkgVersion)

tests/tester.nim

@@ -907,6 +907,16 @@ suite "nimble run":
       check output.contains("tests/run/run --debug check")
       check output.contains("""Testing `nimble run`: @["--debug", "check"]""")
 
+test "NimbleVersion is defined":
+  cd "nimbleVersionDefine":
+    var (output, exitCode) = execNimble("c", "-r", "src/nimbleVersionDefine.nim")
+    check output.contains("0.1.0")
+    check exitCode == QuitSuccess
+
+    var (output2, exitCode2) = execNimble("run", "nimbleVersionDefine")
+    check output2.contains("0.1.0")
+    check exitCode2 == QuitSuccess
+
 test "compilation without warnings":
   const buildDir = "./buildDir/"
   const filesToBuild = [