NimScript: setCommand takes an optional project filename

compiler/nim.nim

@@ -48,7 +48,7 @@ proc handleCmdLine() =
         gProjectFull = canonicalizePath(gProjectName)
       except OSError:
         gProjectFull = gProjectName
-      var p = splitFile(gProjectFull)
+      let p = splitFile(gProjectFull)
       gProjectPath = p.dir
       gProjectName = p.name
     else:

compiler/scriptconfig.nim

@@ -105,6 +105,13 @@ proc setupVM*(module: PSym; scriptName: string): PEvalContext =
     setResult(a, strutils.cmpIgnoreCase(a.getString 0, a.getString 1))
   cbconf setCommand:
     options.command = a.getString 0
+    let arg = a.getString 1
+    if arg.len > 0:
+      gProjectName = arg
+      try:
+        gProjectFull = canonicalizePath(gProjectPath / gProjectName)
+      except OSError:
+        gProjectFull = gProjectName
   cbconf getCommand:
     setResult(a, options.command)
   cbconf switch:

lib/system/nimscript.nim

@@ -56,7 +56,7 @@ proc getCommand*(): string =
   ## "c", "js", "build", "help".
   builtin
 
-proc setCommand*(cmd: string) =
+proc setCommand*(cmd: string; project="") =
   ## Sets the Nim command that should be continued with after this Nimscript
   ## has finished.
   builtin