moved new feature to separate 'distros.nim' module

src/nimblepkg/nimscriptapi.nim

@@ -19,6 +19,9 @@ var
     installExt*, bin*: seq[string] = @[] ## Nimble metadata.
   requiresData*: seq[string] = @[] ## The package's dependencies.
 
+  foreignDeps*: seq[string] = @[] ## The foreign dependencies. Only
+                                  ## exported for 'distros.nim'.
+
 proc requires*(deps: varargs[string]) =
   ## Call this to set the list of requirements of your Nimble
   ## package.
@@ -42,58 +45,3 @@ proc getPkgDir*(): string =
   ## Returns the package directory containing the .nimble file currently
   ## being evaluated.
   builtin
-
-from strutils import contains
-
-type
-  Distribution* {.pure.} = enum ## an enum so that the poor programmer
-                                ## cannot introduce typos
-    Windows, ## some version of Windows
-    Posix,   ## some Posix system
-    MacOSX,  ## some version of OSX
-    Linux,   ## some version of Linux
-    Ubuntu,
-    Gentoo,
-    Fedora,
-    RedHat,
-    BSD,
-    FreeBSD,
-    OpenBSD
-
-proc detectOsImpl(d: Distribution): bool =
-  case d
-  of Distribution.Windows: ## some version of Windows
-    result = defined(windows)
-  of Distribution.Posix: result = defined(posix)
-  of Distribution.MacOSX: result = defined(macosx)
-  of Distribution.Linux: result = defined(linux)
-  of Distribution.Ubuntu, Distribution.Gentoo, Distribution.FreeBSD,
-     Distribution.OpenBSD, Distribution.Fedora:
-    result = $d in gorge"uname"
-  of Distribution.RedHat:
-    result = "Red Hat" in gorge"uname"
-  of Distribution.BSD: result = defined(bsd)
-
-template detectOs*(d: untyped): bool =
-  detectOsImpl(Distribution.d)
-
-var foreignDeps: seq[string] = @[]
-
-proc foreignCmd*(cmd: string; requiresSudo=false) =
-  foreignDeps.add((if requiresSudo: "sudo " else: "") & cmd)
-
-proc foreignDep*(foreignPackageName: string) =
-  let p = foreignPackageName
-  when defined(windows):
-    foreignCmd "Chocolatey install " & p
-  elif defined(bsd):
-    foreignCmd "ports install " & p, true
-  elif defined(linux):
-    if detectOs(Ubuntu):
-      foreignCmd "apt-get install " & p, true
-    elif detectOs(Gentoo):
-      foreignCmd "emerge install " & p, true
-    elif detectOs(Fedora):
-      foreignCmd "yum install " & p, true
-  else:
-    discard