Add switch support

src/nimblepkg/nimscriptapi.nim

@@ -3,8 +3,8 @@
 
 ## This module is implicitly imported in NimScript .nimble files.
 
-import system except getCommand, setCommand
-import strformat, strutils
+import system except getCommand, setCommand, switch, `--`
+import strformat, strutils, tables
 
 var
   packageName* = ""    ## Set this to the package name. It
@@ -28,6 +28,7 @@ var
   beforeHooks: seq[string] = @[]
   afterHooks: seq[string] = @[]
   commandLineParams: seq[string] = @[]
+  flags: TableRef[string, seq[string]]
 
   command = "e"
   project = ""
@@ -50,6 +51,21 @@ proc setCommand(cmd: string, prj = "") =
   if prj.len != 0:
     project = prj
 
+proc switch(key: string, value="") =
+  if flags.isNil:
+    flags = newTable[string, seq[string]]()
+
+  if flags.hasKey(key):
+    flags[key].add(value)
+  else:
+    flags[key] = @[value]
+
+template `--`(key, val: untyped) =
+  switch(astToStr(key), strip astToStr(val))
+
+template `--`(key: untyped) =
+  switch(astToStr(key), "")
+
 template printIfLen(varName) =
   if varName.len != 0:
     iniOut &= astToStr(varName) & ": \"" & varName & "\"\n"
@@ -98,6 +114,15 @@ proc onExit() =
     output &= "\"command\": \"" & command & "\", "
     if project.len != 0:
       output &= "\"project\": \"" & project & "\", "
+    if not flags.isNil and flags.len != 0:
+      output &= "\"flags\": {"
+      for key, val in flags.pairs:
+        output &= "\"" & key & "\": ["
+        for v in val:
+          output &= "\"" & v & "\", "
+        output = output[0 .. ^3] & "], "
+      output = output[0 .. ^3] & "}, "
+
     output &= "\"retVal\": " & $retVal
 
     echo "{" & output & "}"

src/nimblepkg/nimscriptwrapper.nim

@@ -61,6 +61,9 @@ proc execScript*(scriptName, actionName: string, options: Options): ExecutionRes
 
     (output, exitCode) = nimsFile.execNimscript(actionName, options)
 
+  defer:
+    nimsFile.removeFile()
+
   if exitCode != 0:
     raise newException(NimbleError, output)
 
@@ -73,21 +76,24 @@ proc execScript*(scriptName, actionName: string, options: Options): ExecutionRes
         parseJson("{}")
 
   result.success = true
+  result.flags = newTable[string, seq[string]]()
   if "command" in j:
     result.command = j["command"].getStr()
   else:
     result.command = internalCmd
   if "project" in j:
     result.arguments.add j["project"].getStr()
+  if "flags" in j:
+    for flag, vals in j["flags"].pairs:
+      result.flags[flag] = @[]
+      for val in vals.items():
+        result.flags[flag].add val.getStr()
   if "retVal" in j:
     result.retVal = j["retVal"].getBool()
-  result.flags = newTable[string, seq[string]]()
 
   if lines.len > 1:
     stdout.writeLine lines[0 .. ^2].join("\n")
 
-  nimsFile.removeFile()
-
 proc execTask*(scriptName, taskName: string,
     options: Options): ExecutionResult[bool] =
   ## Executes the specified task in the specified script.

src/nimblepkg/packageparser.nim

@@ -288,11 +288,12 @@ proc readPackageInfoFromNims(scriptName: string, options: Options,
   let
     (nimsFile, iniFile) = setupNimscript(scriptName, options)
 
+  defer:
+    nimsFile.removeFile()
+
   if iniFile.fileExists():
     readPackageInfoFromNimble(iniFile, result)
 
-  nimsFile.removeFile()
-
 proc inferInstallRules(pkgInfo: var PackageInfo, options: Options) =
   # Binary packages shouldn't install .nim files by default.
   # (As long as the package info doesn't explicitly specify what should be