More use of the cli module.

src/nimble.nim

@@ -321,8 +321,8 @@ proc buildFromDir(pkgInfo: PackageInfo, paths: seq[string], forRelease: bool) =
   for path in paths: args.add("--path:\"" & path & "\" ")
   for bin in pkgInfo.bin:
     let outputOpt = "-o:\"" & pkgInfo.getOutputDir(bin) & "\""
-    echo("Building ", pkginfo.name, "/", bin, " using ", pkgInfo.backend,
+    display("Building", "$1/$2 using $3 backend" %
-         " backend...")
+            [pkginfo.name, bin, pkgInfo.backend], priority = HighPriority)
 
     let outputDir = pkgInfo.getOutputDir("")
     if not existsDir(outputDir):
@@ -362,13 +362,14 @@ proc removePkgDir(dir: string, options: Options) =
     if toSeq(walkDirRec(dir)).len == 0:
       removeDir(dir)
     else:
-      echo("WARNING: Cannot completely remove " & dir &
+      display("Warning:", ("Cannot completely remove $1. Files not installed " &
-           ". Files not installed by nimble are present.")
+              "by nimble are present.") % dir, Warning, HighPriority)
   except OSError, JsonParsingError:
-    echo("Error: Unable to read nimblemeta.json: ", getCurrentExceptionMsg())
+    display("Warning", "Unable to read nimblemeta.json: " &
+            getCurrentExceptionMsg(), Warning, HighPriority)
     if not options.prompt("Would you like to COMPLETELY remove ALL files " &
                           "in " & dir & "?"):
-      quit(QuitSuccess)
+      raise NimbleQuit(msg: "")
     removeDir(dir)
 
 proc vcsRevisionInDir(dir: string): string =
@@ -955,7 +956,8 @@ proc doAction(options: Options) =
     createDir(options.getPkgsDir)
 
   if not execHook(options, true):
-    echo("Pre-hook prevented further execution.")
+    display("Warning", "Pre-hook prevented further execution.", Warning,
+            HighPriority)
     return
   case options.action.typ
   of actionRefresh:
@@ -996,14 +998,19 @@ proc doAction(options: Options) =
 
     let execResult = execTask(nimbleFile, options.action.command, options)
     if not execResult.success:
-      echo("FAILURE: Could not find task ", options.action.command, " in ",
+      writeHelp(false)
-           nimbleFile)
+
-      writeHelp()
+      raise newException(NimbleError, "Could not find task $1 in $2" %
+                        [options.action.command, nimbleFile])
+
     if execResult.command.normalize == "nop":
-      echo("WARNING: Using `setCommand 'nop'` is not necessary.")
+      display("Warning:", "Using `setCommand 'nop'` is not necessary.", Warning,
+              HighPriority)
       return
+
     if not execHook(options, false):
       return
+
     if execResult.hasTaskRequestedCommand():
       var newOptions = initOptions()
       newOptions.config = options.config

src/nimblepkg/nimscriptsupport.nim

@@ -15,7 +15,7 @@ from compiler/scriptconfig import setupVM
 from compiler/astalgo import strTableGet
 import compiler/options as compiler_options
 
-import common, version, options, packageinfo
+import common, version, options, packageinfo, cli
 import os, strutils, strtabs, times, osproc, sets
 
 when not declared(resetAllModulesHard):
@@ -291,7 +291,7 @@ proc readPackageInfoFromNims*(scriptName: string, options: Options,
       if msgs.gErrorCounter > 0:
         raise newException(NimbleError, previousMsg)
       elif previousMsg.len > 0:
-        echo(previousMsg)
+        display("Info", previousMsg, priority = HighPriority)
       if output.normalize.startsWith("error"):
         raise newException(NimbleError, output)
       previousMsg = output
@@ -367,7 +367,8 @@ proc execTask*(scriptName, taskName: string,
   result.success = true
   result.flags = newStringTable()
   compiler_options.command = internalCmd
-  echo("Executing task ", taskName, " in ", scriptName)
+  display("Executing",  "task $# in $#" % [taskName, scriptName],
+          priority = HighPriority)
 
   let thisModule = execScript(scriptName, result.flags, options)
   let prc = thisModule.tab.strTableGet(getIdent(taskName & "Task"))
@@ -397,7 +398,8 @@ proc execHook*(scriptName, actionName: string, before: bool,
   let hookName =
     if before: actionName.toLowerAscii & "Before"
     else: actionName.toLowerAscii & "After"
-  echo("Attempting to execute hook ", hookName, " in ", scriptName)
+  display("Attempting", "to execute hook $# in $#" % [hookName, scriptName],
+          priority = MediumPriority)
 
   let thisModule = execScript(scriptName, result.flags, options)
   # Explicitly execute the task procedure, instead of relying on hack.

src/nimblepkg/options.nim

@@ -91,14 +91,15 @@ For more information read the Github readme:
   https://github.com/nim-lang/nimble#readme
 """
 
-proc writeHelp*() =
+proc writeHelp*(quit=true) =
   echo(help)
-  quit(QuitSuccess)
+  if quit:
+    raise NimbleQuit(msg: "")
 
 proc writeVersion() =
   echo("nimble v$# compiled at $# $#" %
       [nimbleVersion, CompileDate, CompileTime])
-  quit(QuitSuccess)
+  raise NimbleQuit(msg: "")
 
 proc parseActionType*(action: string): ActionType =
   case action.normalize()