Remove unnecessary scripts, and add other adjustments for build speed

.travis.yml

@@ -26,43 +26,46 @@
 
 ---
 language: python
-sudo: required
-dist: trusty
+cache: pip
+virtualenv:
+  # we need system packages in Travis-CI's virtualenv in order to access pygtk, installed via apt-get
+  system_site_packages: true
+dist: xenial
+addons:
+  apt:
+    # instruct travis-ci to always run apt-get before each build
+    update: true
 
 stages:
 - unit-test
 - test
 
 env:
-- CHUNK="1/4"
-- CHUNK="2/4"
-- CHUNK="3/4"
-- CHUNK="4/4"
+  global:
+  - PATH="${TRAVIS_BUILD_DIR}/bin:$PATH"
+  # Only run the generic tests on Travis CI.
+  - CYLC_TEST_RUN_PLATFORM=false
+  # Custom diff command to ignore Xlib errors (xvfb has not RANDR extension).
+  - CYLC_TEST_DIFF_CMD="diff -I Xlib -u"
+  matrix:
+  - CHUNK="1/4"
+  - CHUNK="2/4"
+  - CHUNK="3/4"
+  - CHUNK="4/4"
 
-before_install: .travis/before_install.sh
-install: .travis/install.sh
+# this is the default test stage, which is used for functional-tests
+install: .travis/install.sh functional-tests docs
 script:
-- source ~/.bashrc
-# Custom diff command to ignore Xlib errors (xvfb has not RANDR extension).
-- export CYLC_TEST_DIFF_CMD='diff -I Xlib -u'
-# Only run the generic tests on Travis CI.
-- export CYLC_TEST_RUN_PLATFORM=false
 # Run tests with virtual frame buffer for X support.
 - xvfb-run -a cylc test-battery --chunk $CHUNK --state=save -j 5 || (echo -e "\n\nRerunning Failed Tests...\n\n"; cylc test-battery --state=failed -j 5)
-
-
 after_script: .travis/after_script.sh
 
 jobs:
   include:
   - stage: unit-test
-    before_install: .travis/before_install.sh
     install:
-    - .travis/install.sh
-    # these dependencies are necessary only for the unit tests
-    - source ~/.bashrc
-    - pip install pycodestyle pytest mock
+    - .travis/install.sh unit-tests
     script:
-    - source ~/.bashrc
     - pycodestyle --ignore=E402,W503,W504 lib/cylc lib/Jinja2Filters/*.py lib/parsec/*.py $(grep -l '#!.*\<python\>' bin/*)
     - PYTHONPATH=$(pwd -P)/lib/ pytest lib/cylc/
+    after_script: true

.travis/after_script.sh

@@ -16,13 +16,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-set -x
-
 # Travis-CI after_script
 
 # Check output (more useful if you narrow down what tests get run)
 
-source ~/.bashrc
-
 find $HOME/cylc-run -name '*.err' -type f -exec echo '==== {} ====' \; -exec cat '{}' \;
 find /tmp/${USER}/cylctb-* -type f -exec echo '==== {} ====' \; -exec cat '{}' \;

.travis/install.sh

@@ -16,25 +16,34 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-set -x
+set -eu
+set -o xtrace
+shopt -s extglob
 
 # Travis-CI install
 
-source ~/.bashrc
+args=("$@")
 
-# Setup local SSH for Cylc jobs
+# pygtk via apt-get, necessary for both unit and functional tests
+sudo apt-get install graphviz libgraphviz-dev python-gtk2-dev heirloom-mailx
 
+# install dependencies required for running unit tests
+if grep 'unit-tests' <<< "${args[@]}"; then
+    pip install EmPy pyopenssl pycodestyle pytest mock
+# install dependencies required for running functional tests
+elif grep 'functional-tests' <<< "${args[@]}"; then
+    # pygraphviz needs special treatment to avoid an error from "from . import release"
+    pip install EmPy pyopenssl pygraphviz \
+      --install-option="--include-path=/usr/include/graphviz" \
+      --install-option="--library-path=/usr/lib/graphviz/"
+fi
+
+# install dependencies required for building documentation, only when instructed to do so
+if grep 'docs' <<< "${args[@]}$"; then
+    sudo apt-get install texlive-latex-base
+fi
+
+# configure local SSH for Cylc jobs
 ssh-keygen -t rsa -f ~/.ssh/id_rsa -N "" -q
 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
 ssh-keyscan -t rsa localhost >> ~/.ssh/known_hosts
-
-# Install dependencies
-
-sudo apt-get update -qq
-sudo apt-get install build-essential texlive-latex-base
-sudo apt-get install at python-pip python-dev graphviz libgraphviz-dev python-gtk2-dev heirloom-mailx
-
-# Pygraphviz needs special treatment to avoid an error from "from . import release"
-
-pip install pygraphviz --install-option="--include-path=/usr/include/graphviz" --install-option="--library-path=/usr/lib/graphviz/"
-pip install EmPy pyopenssl