Implicitly set noNimblePath when nimble.lock is present (#21266)

Fixes https://github.com/nim-lang/nimble/issues/1004

compiler/nim.nim

@@ -41,6 +41,15 @@ when defined(profiler) or defined(memProfiler):
   {.hint: "Profiling support is turned on!".}
   import nimprof
 
+proc nimbleLockExists(config: ConfigRef): bool =
+  const nimbleLock = "nimble.lock"
+  let pd = if not config.projectPath.isEmpty: config.projectPath else: AbsoluteDir(getCurrentDir())
+  if optSkipParentConfigFiles notin config.globalOptions:
+    for dir in parentDirs(pd.string, fromRoot=true, inclusive=false):
+      if fileExists(dir / nimbleLock):
+        return true
+  return fileExists(pd.string / nimbleLock)
+
 proc processCmdLine(pass: TCmdLinePass, cmd: string; config: ConfigRef) =
   var p = parseopt.initOptParser(cmd)
   var argsCount = 0
@@ -74,6 +83,11 @@ proc processCmdLine(pass: TCmdLinePass, cmd: string; config: ConfigRef) =
         config.arguments.len > 0 and config.cmd notin {cmdTcc, cmdNimscript, cmdCrun}:
       rawMessage(config, errGenerated, errArgsNeedRunOption)
 
+  if config.nimbleLockExists:
+    # disable nimble path if nimble.lock is present.
+    # see https://github.com/nim-lang/nimble/issues/1004
+    disableNimblePath(config)
+
 proc getNimRunExe(conf: ConfigRef): string =
   # xxx consider defining `conf.getConfigVar("nimrun.exe")` to allow users to
   # customize the binary to run the command with, e.g. for custom `nodejs` or `wine`.