fix nim-lang#14142: no more clash with: import os + use of existsDir/…

…dirExists/existsFile/fileExists/findExe in config.nims

compiler/condsyms.nim

@@ -77,7 +77,7 @@ proc initDefines*(symbols: StringTableRef) =
   defineSymbol("nimHasUserErrors")
   defineSymbol("nimUncheckedArrayTyp")
   defineSymbol("nimHasTypeof")
-  defineSymbol("nimErrorProcCanHaveBody")
+  defineSymbol("nimErrorProcCanHaveBody") # since #9665 but now unused
   defineSymbol("nimHasInstantiationOfInMacro")
   defineSymbol("nimHasHotCodeReloading")
   defineSymbol("nimHasNilSeqs")

lib/pure/os.nim

@@ -74,8 +74,10 @@ elif defined(posix):
 else:
   {.error: "OS module not ported to your operating system!".}
 
-when weirdTarget and defined(nimErrorProcCanHaveBody):
-  {.pragma: noNimScript, error: "this proc is not available on the NimScript target".}
+when weirdTarget:
+  template noNimScript(body): untyped = discard
+  # Adding a `disable` template and `{.pragma: noNimScript, disable.}`
+  # doesn't work pending https://github.com/timotheecour/Nim/issues/142
 else:
   {.pragma: noNimScript.}
 

tests/test_nimscript.nims

@@ -1,6 +1,7 @@
 # This nimscript is used to test if the following modules can be imported
 # http://nim-lang.org/docs/nims.html
 
+{.push warning[UnusedImport]: off.}
 import algorithm
 import base64
 import colors
@@ -22,7 +23,16 @@ import unicode
 import uri
 import macros
 
+# {.pop.} # xxx `pop` would resurface UnusedImport warnings
+
 block:
   doAssert "./foo//./bar/".normalizedPath == "foo/bar".unixToNativePath
 
 echo "Nimscript imports are successful."
+
+block: # #14142
+  discard existsDir("/usr")
+  discard dirExists("/usr")
+  discard existsFile("/usr/foo")
+  discard fileExists("/usr/foo")
+  discard findExe("nim")