tracking the memory usage of orc-booting compiler for each commit (#19941)

* yaml

* pub

* redo

* let's comment

* now action

* newly

* code name

* build

* ready

* remove submodule

* build

* modify name

* fix

* rephrase

* trigger when PR is merged

ci/action.nim

@@ -0,0 +1,28 @@
+import std/[strutils, os, osproc, parseutils, strformat]
+
+
+proc main() =
+  var msg = ""
+  const cmd = "./koch boot --gc:orc -d:release"
+
+  let (output, exitCode) = execCmdEx(cmd)
+
+  doAssert exitCode == 0, output
+
+  var start = rfind(output, "Hint: gc")
+  if start < 0:
+    start = rfind(output, "Hint: mm")
+  doAssert parseUntil(output, msg, "; proj", start) > 0, output
+
+  let (commitHash, _) = execCmdEx("""git log --format="%H" -n 1""")
+
+  let welcomeMessage = fmt"""Thanks for your hard work on this PR!
+The lines below are statistics of the Nim compiler built from {commitHash}
+
+{msg}
+"""
+  createDir "ci/nimcache"
+  writeFile "ci/nimcache/results.txt", welcomeMessage
+
+when isMainModule:
+  main()