feat: add download callback

Author: Stratus3D

Diff for: .github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Install system packages on Ubuntu
         if: ${{ runner.os == 'Linux' }}
-        run: sudo apt-get update; sudo apt-get -y install build-essential autoconf m4 libncurses5-dev libwxgtk3.0-gtk3-dev libgl1-mesa-dev libglu1-mesa-dev libpng-dev libssh-dev xsltproc fop libxml2-utils libncurses-dev
+        run: sudo apt-get update; sudo apt-get -y install build-essential autoconf m4 libncurses5-dev libwxgtk3.2-dev libgl1-mesa-dev libglu1-mesa-dev libpng-dev libssh-dev xsltproc fop libxml2-utils libncurses-dev
 
       - name: Install system packages on macOS
         if: ${{ runner.os == 'macOS' }}

Diff for: bin/download

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+# Unoffical Bash "strict mode"
+# http://redsymbol.net/articles/unofficial-bash-strict-mode/
+set -euo pipefail
+#ORIGINAL_IFS=$IFS
+IFS=$'\t\n' # Stricter IFS settings
+
+# Because kerl downloads and builds versions in one command this script is
+# a no-op. It's now required by asdf so we have it here so that it continues
+# to pass the tests.
+exit 0