WIP Upgrading to Nim 0.19. Getting docker pieces compiling.

* Addressing breaking changes in migration from Nim 0.18 to 0.19.
* Finishing the initial pass at the refactor required to include
  docker-based builds.
* Regaining confidence in the existing functionality by getting all
  tests passing again after docker introduction (still need new tests to
  cover new docker functionality).

src/test/nim/functional/tserver.nim

@@ -50,7 +50,7 @@ suite "strawboss server":
       @["serve", "-c", tempCfgPath], loadEnv(), {poUsePath})
 
     # give the server time to spin up
-    sleep(100)
+    sleep(200)
 
   teardown:
     discard newAsyncHttpClient().post(apiBase & "/service/debug/stop")
@@ -60,7 +60,7 @@ suite "strawboss server":
       removeFile(tempCfgPath)
 
     # give the server time to spin down but kill it after that
-    sleep(100)
+    sleep(200)
     if serverProcess.running: kill(serverProcess)
 
   test "handle missing project configuration":

src/test/nim/testutil.nim

@@ -26,7 +26,7 @@ proc waitForBuild*(client: HttpClient, apiBase, projectName, runId: string,
     #echo "Checking (" & $curElapsed & " has passed)."
 
     if curElapsed > toFloat(timeout):
-      raise newException(SystemError, "Timeout exceeded waiting for build.")
+      raise newException(Exception, "Timeout exceeded waiting for build.")
 
     let resp = client.get(apiBase & "/project/" & projectName & "/run/" & runId)
 

src/test/nim/unit/tconfiguration.nim

@@ -1,6 +1,7 @@
 import json, strtabs, times, tables, unittest, uuids
 
 from langutils import sameContents
+from timeutils import trimNanoSec
 import ../../../main/nim/strawbosspkg/configuration
 
 suite "load and save configuration objects":
@@ -26,7 +27,7 @@ suite "load and save configuration objects":
       stepName: "build",
       buildRef: "master",
       workspaceDir: "/no-real/dir",
-      timestamp: getLocalTime(getTime()),
+      timestamp: getTime().local.trimNanoSec,
       forceRebuild: true)
 
     let rrStr = $rr1
@@ -107,7 +108,7 @@ suite "load and save configuration objects":
       pc.steps["build"].dontSkip == true
       pc.steps["build"].stepCmd == "cust-build"
       pc.steps["build"].workingDir == "dir1"
-      pc.steps["containerImage"] == "alpine"
+      pc.steps["build"].containerImage == "alpine"
       sameContents(pc.steps["build"].artifacts, @["bin1", "doc1"])
       sameContents(pc.steps["build"].depends, @["test"])
       sameContents(pc.steps["build"].expectedEnv, @["VAR1"])
@@ -117,8 +118,8 @@ suite "load and save configuration objects":
       pc.steps["test"].name == "test"
       pc.steps["test"].dontSkip == false
       pc.steps["test"].stepCmd == "true"
-      pc.steps["test"].workingDir == ".:
-      pc.steps["test"].containerImage.isNilOrEmpty
+      pc.steps["test"].workingDir == "."
+      pc.steps["test"].containerImage.len == 0
       sameContents(pc.steps["test"].artifacts, @[])
       sameContents(pc.steps["test"].depends, @[])
       sameContents(pc.steps["test"].expectedEnv, @[])