Fix tests. Add test for hooks.

src/nimblepkg/nimscriptapi.nim

@@ -39,4 +39,6 @@ template after*(action: untyped, body: untyped): untyped =
 template builtin = discard
 
 proc getPkgDir*(): string =
+  ## Returns the package directory containing the .nimble file currently
+  ## being evaluated.
   builtin

src/nimblepkg/nimscriptsupport.nim

@@ -229,7 +229,7 @@ proc execScript(scriptName: string, flags: StringTableRef, options: Options) =
         body
 
   cbApi getPkgDir:
-    setResult(a, "FOOBAR")
+    setResult(a, scriptName.splitFile.dir)
 
   compileSystemModule()
   processModule(m, llStreamOpen(scriptName, fmRead), nil)

src/nimblepkg/packageparser.nim

@@ -230,7 +230,8 @@ proc readPackageInfo*(nf: NimbleFile, options: Options,
         raise newException(NimbleError, msg)
 
   validatePackageInfo(result, nf)
-  options.pkgInfoCache[nf] = result
+  if not result.isMinimal:
+    options.pkgInfoCache[nf] = result
 
 proc getPkgInfo*(dir: string, options: Options): PackageInfo =
   ## Find the .nimble file in ``dir`` and parses it, returning a PackageInfo.