add noSolve mode

config.nims

@@ -1,4 +1,4 @@
-import std/[algorithm, os, sequtils]
+import std/[algorithm, os, strformat, sequtils]
 
 --noNimblePath
 --path:"./src"
@@ -6,4 +6,7 @@ import std/[algorithm, os, sequtils]
 task solve, "run all solutions":
   for dir in walkDirRec("solutions", yieldFilter = {pcDir}).toSeq().sortedByIt(it):
     echo "--",dir,"--"
-    selfExec "r --hint:all:off " & dir & "/solution.nim"
+    var cmd = "r --hint:all:off "
+    when defined(noSolve): cmd &= "-d:noSolve"
+    cmd &= fmt" {dir}/solution.nim "
+    selfExec cmd

src/aoc.nim

@@ -6,6 +6,7 @@ import std/[
 macro solve*(arg: untyped): untyped =
   arg.expectKind nnkStmtList
   result = newStmtList()
+  when defined(noSolve): return
   for stmt in arg:
     stmt.expectKind nnkCall
     stmt[0].expectKind nnkStrLit