Updating travis-ci infrastructure to run SuperCollider for tests.

installing audio stuff, specifying node version in nvmrc

hoping this will print the available devices

installing jack would help

sudo

sudo

list backends with help

jackd

jackd

start jackd in background

no-realtime

.nvmrc

@@ -0,0 +1 @@
+12.12.0

.travis.yml

@@ -1,12 +1,16 @@
 dist: xenial
 language: node_js
-node_js:
-  - node
 before_install:
+  - $TRAVIS_BUILD_DIR/.travis/install_system_audio.sh
+  - sudo bash $TRAVIS_BUILD_DIR/.travis/prep-dummy-soundcard.sh
+  - $TRAVIS_BUILD_DIR/.travis/start_jackd_dummy.sh
   - $TRAVIS_BUILD_DIR/.travis/install_supercollider.sh
   - $TRAVIS_BUILD_DIR/.travis/install_supercolliderjs_config.sh
   - $TRAVIS_BUILD_DIR/.travis/install_quark.sh
 cache:
   directories:
     - $HOME/supercollider
     - $HOME/sc3-plugins
+env:
+  global:
+    AUDIODEV=null

.travis/install_system_audio.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+sudo apt-get update -qq
+sudo usermod -a -G audio travis
+sudo apt-get install -y portaudio19-dev
+sudo apt-get install -y libasound2-dev alsa-utils alsa-oss
+sudo apt-get install -y jack-tools

.travis/prep-dummy-soundcard.sh

@@ -0,0 +1,24 @@
+cat << EOF > /home/travis/.asoundrc
+       pcm.dummy {
+          type hw
+          card 0
+       }
+       
+       ctl.dummy {
+          type hw
+          card 0
+       }
+EOF
+chmod go+r /home/travis/.asoundrc
+cat << EOF >> /etc/modules.conf
+# OSS/Free portion - card #1
+alias sound-slot-0 snd-card-0
+alias sound-service-0-0 snd-mixer-oss
+alias sound-service-0-1 snd-seq-oss
+alias sound-service-0-3 snd-pcm-oss
+alias sound-service-0-8 snd-seq-oss
+alias sound-service-0-12 snd-pcm-oss
+EOF
+modprobe snd-dummy 
+# ; modprobe snd-pcm-oss ; modprobe snd-mixer-oss ; modprobe snd-seq-oss
+mkdir -p tmp && chmod 777 tmp

.travis/start_jackd_dummy.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+jackd --no-realtime -d dummy &