Turn into a Nimble package

The directory structure was changed to conform to the Nimble packaging rules

.gitignore

@@ -3,3 +3,4 @@ nimblecache/
 htmldocs/
 bin/*
 testResults/*
+build/

eth_verkle.nimble

@@ -0,0 +1,33 @@
+mode = ScriptMode.Verbose
+
+packageName   = "eth_verkle"
+version       = "0.0.1"
+author        = "Status Research & Development GmbH"
+description   = "An Ethereum Verkle Tree implementation for Nim"
+license       = "Apache License 2.0"
+skipDirs      = @["tests"]
+
+requires "nim >= 1.6.0",
+         "unittest2"
+
+let nimc = getEnv("NIMC", "nim") # Which nim compiler to use
+let lang = getEnv("NIMLANG", "c") # Which backend (c/cpp/js)
+let flags = getEnv("NIMFLAGS", "") # Extra flags for the compiler
+let verbose = getEnv("V", "") notin ["", "0"]
+
+let cfg =
+  " --styleCheck:usages --styleCheck:error" &
+  (if verbose: "" else: " --verbosity:0 --hints:off") &
+  " --skipParentCfg --skipUserCfg --outdir:build --nimcache:build/nimcache -f"
+
+proc build(args, path: string) =
+  exec nimc & " " & lang & " " & cfg & " " & flags & " " & args & " " & path
+
+proc run(args, path: string) =
+  build args & " -r", path
+  if (NimMajor, NimMinor) > (1, 6):
+    build args & " --mm:refc -r", path
+
+task test, "Run all tests":
+  for threads in ["--threads:off", "--threads:on"]:
+    run threads, "tests/test_all"

eth_verkle/tree/operations.nim

@@ -9,10 +9,10 @@
 
 import
   std/[sequtils, sugar],
-  ../[utils, config],
-  tree
-when TraceLogs: import std/strformat
+  ".."/[utils, config],
+  ./tree
 
+when TraceLogs: import std/strformat
 
 proc setValue(node: ValuesNode, index: byte, value: Bytes32) =
   ## Heap-allocates the given `value` and stores it at the given `index`

tests/test_all.nim

@@ -8,11 +8,12 @@
 ##  The main module. Provides some tests.
 
 import
-  std/[random, streams],
+  std/[random, streams, os],
   unittest2,
-  src/utils,
-  src/tree/[tree, operations]
+  ../eth_verkle/utils,
+  ../eth_verkle/tree/[tree, operations]
 
+createDir "testResults"
 
 suite "main":