try fixed nimble before hook

gintro.nimble

@@ -67,8 +67,8 @@ proc prep =
   cd(td)
   rmDir(wd) # cleanup
 
-task prepare, "preparing gintro":
+#task prepare, "preparing gintro":
-#before install:
+before install:
 
   echo "preparing gintro"
   prep()

gintro.nimble.bak2

@@ -0,0 +1,76 @@
+# Package
+
+version       = "0.2.0"
+author        = "Stefan Salewski"
+description = "High level GObject-Introspection based GTK3 bindings"
+license       = "MIT"
+skipDirs = @["examples", "tests"]
+
+# Dependencies
+
+requires "nim >= 0.17.2"
+
+when defined(nimdistros):
+  import distros
+  if detectOs(Ubuntu) or detectOs(Debian):
+    foreignDep "libgtk-3-dev"
+  elif detectOs(Gentoo):
+    foreignDep "gtk+" # can we specify gtk3?
+  #else: we don't know the names for all the other distributions
+  #  foreignDep "openssl"
+
+import ospaths
+
+proc prep =
+  let this = thisDir()
+  let td = getTempDir()
+  cd(td)
+  let wd = "gintrosalewski"
+  if dirExists(wd):
+    quit("gintro: tmp directory already exists!")
+  mkDir(wd)
+  cd(wd)
+  mkDir("ngtk3")
+  cd("ngtk3")
+
+  cpFile(this / "tests" / "gen.nim", td / wd / "gen.nim")
+  cpFile(this / "tests" / "combinatorics.nim", td / wd / "combinatorics.nim")
+
+  cd(td)
+  cd(wd)
+
+  try:
+    exec("wget 'https://raw.githubusercontent.com/StefanSalewski/oldgtk3/master/oldgtk3/gobject.nim' -O gobject.nim")
+    exec("wget 'https://raw.githubusercontent.com/StefanSalewski/oldgtk3/master/oldgtk3/glib.nim' -O glib.nim")
+    exec("wget 'https://raw.githubusercontent.com/StefanSalewski/oldgtk3/master/oldgtk3/gir.nim' -O gir.nim")
+  except:
+    try:
+      exec("nimgrab 'https://raw.githubusercontent.com/StefanSalewski/oldgtk3/master/oldgtk3/gobject.nim' gobject.nim")
+      exec("nimgrab 'https://raw.githubusercontent.com/StefanSalewski/oldgtk3/master/oldgtk3/glib.nim' glib.nim")
+      exec("nimgrab 'https://raw.githubusercontent.com/StefanSalewski/oldgtk3/master/oldgtk3/gir.nim' gir.nim")
+    except:
+      echo "For bootstrapping of gintro package we need the low level files gobject.nim, glib.nim and gir.nim."
+      echo "We take these from package oldgtk3. As most gintro users will not need the whole oldgtk3 package"
+      echo "we tried to only download these 3 single files using wget or nimgrab. But that failed."
+      echo "Ensure that wget or nimgrab are available. wget should be available for Unix like systems."
+      echo "Nimgrab should be available in Nim/tools directory. You may compile it with 'nim c -d:ssl nimgrab.nim'"
+      echo "and put it into your search path"
+      echo "For the unlikely case that you have already full oldgtk3 package installed, we will just try to continue..."
+
+  exec("nim c gen.nim")
+  mkDir("nim_gi")
+  exec(td / wd / "gen")
+  let mods = listFiles("nim_gi")
+  for i in mods:
+    let j = i[7 .. ^1]
+    cpFile(i, this / "gintro" / j)
+  cd(td)
+  rmDir(wd) # cleanup
+
+task prepare, "preparing gintro":
+#before install:
+
+  echo "preparing gintro"
+  prep()
+  
+