DrNim (Nim compiler with Z3 integration) (#13743)

* code cleanups and feature additions
* added basic test and koch/CI integration
* make it build on Unix
* DrNim: now buildable on Unix, only takes 10 minutes, enjoy
* added basic documentation for DrNim which can also be seen as the RFC we're following
* drnim: change the build setup so that drnim.exe ends up in bin/
* makes simple floating point ranges work
* added basic float range check
* drnim: teach Z3 about Nim's range types plus code refactoring
* drnim: make unsigned numbers work
* added and fixed index checking under setLen
* first implementation of .ensures, .invariant and .assume (.requires still missing and so is proc type compatibility checking
* drnim: .requires checking implemented
* drnim: implemented .ensures properly
* more impressive test involving min()
* drnim: check for proc type compatibility and base method compatibility wrt .requires and .ensures
* testament: support for 'pattern <directory>
* koch: uses new <directory> feature of testament
* drnim: added tiny musings about 'old'
* Make testament work with old SSL versions
* koch: add support for 'koch drnim -d:release'
* drnim: preparations for the param.old notation

testament/categories.nim

@@ -728,12 +728,22 @@ proc processCategory(r: var TResults, cat: Category,
 
 proc processPattern(r: var TResults, pattern, options: string; simulate: bool) =
   var testsRun = 0
-  for name in walkPattern(pattern):
-    if simulate:
-      echo "Detected test: ", name
-    else:
-      var test = makeTest(name, options, Category"pattern")
-      testSpec r, test
-    inc testsRun
+  if dirExists(pattern):
+    for k, name in walkDir(pattern):
+      if k in {pcFile, pcLinkToFile} and name.endsWith(".nim"):
+        if simulate:
+          echo "Detected test: ", name
+        else:
+          var test = makeTest(name, options, Category"pattern")
+          testSpec r, test
+        inc testsRun
+  else:
+    for name in walkPattern(pattern):
+      if simulate:
+        echo "Detected test: ", name
+      else:
+        var test = makeTest(name, options, Category"pattern")
+        testSpec r, test
+      inc testsRun
   if testsRun == 0:
     echo "no tests were found for pattern: ", pattern

testament/testament.nim.cfg

@@ -1,2 +1,4 @@
 path = "$nim" # For compiler/nodejs
 -d:ssl # For azure
+# my SSL doesn't have this feature and I don't care:
+-d:nimDisableCertificateValidation