removed compiler internal list implementation (#5371)

compiler/options.nim

@@ -8,7 +8,7 @@
 #
 
 import
-  os, lists, strutils, strtabs, osproc, sets
+  os, strutils, strtabs, osproc, sets
 
 const
   hasTinyCBackend* = defined(tinyc)
@@ -129,7 +129,8 @@ var
   gExitcode*: int8
   gCmd*: TCommands = cmdNone  # the command
   gSelectedGC* = gcRefc       # the selected GC
-  searchPaths*, lazyPaths*: TLinkedList
+  searchPaths*: seq[string] = @[]
+  lazyPaths*: seq[string]   = @[]
   outFile*: string = ""
   docSeeSrcUrl*: string = ""  # if empty, no seeSrc will be generated. \
   # The string uses the formatting variables `path` and `line`.
@@ -267,9 +268,7 @@ proc removeTrailingDirSep*(path: string): string =
 
 proc disableNimblePath*() =
   gNoNimblePath = true
-  lazyPaths.head = nil
-  lazyPaths.tail = nil
-  lazyPaths.counter = 0
+  lazyPaths.setLen(0)
 
 include packagehandling
 
@@ -336,27 +335,22 @@ proc completeGeneratedFilePath*(f: string, createSubDir: bool = true): string =
   result = joinPath(subdir, tail)
   #echo "completeGeneratedFilePath(", f, ") = ", result
 
-iterator iterSearchPath*(searchPaths: TLinkedList): string =
-  var it = PStrEntry(searchPaths.head)
-  while it != nil:
-    yield it.data
-    it = PStrEntry(it.next)
-
 proc rawFindFile(f: string): string =
-  for it in iterSearchPath(searchPaths):
+  for it in searchPaths:
     result = joinPath(it, f)
     if existsFile(result):
       return result.canonicalizePath
   result = ""
 
 proc rawFindFile2(f: string): string =
-  var it = PStrEntry(lazyPaths.head)
-  while it != nil:
-    result = joinPath(it.data, f)
+  for i, it in lazyPaths:
+    result = joinPath(it, f)
     if existsFile(result):
-      bringToFront(lazyPaths, it)
+      # bring to front
+      for j in countDown(i,1):
+        swap(lazyPaths[j], lazyPaths[j-1])
+      
       return result.canonicalizePath
-    it = PStrEntry(it.next)
   result = ""
 
 template patchModule() {.dirty.} =