Include setup helper scripts in tardis

We can't use an external repository because we are hacking the scripts
heavily to work with a conda environment file instead of defining the
dependencies with environment variables in .travis.yml.

.travis.yml

@@ -100,8 +100,7 @@ install:
     # in how to install a package, in which case you can have additional
     # commands in the install: section below.
 
-    - git clone git://github.com/yeganer/ci-helpers.git
-    - source ci-helpers/travis/setup_conda.sh
+    - source travis/setup_conda.sh
     - source travis/before_install.sh
 
     # As described above, using ci-helpers, you should be able to set up an

travis/before_install.sh

@@ -1,6 +1,3 @@
-conda env create -f tardis_env27.yml
-source activate tardis
-
 if [[ $SETUP_CMD == *coverage* ]]; then
     conda install -c conda-forge git-lfs=2.2.1 -y
     git lfs install --skip-smudge

travis/setup_conda.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# Note to the future: keep the conda scripts separate for each OS because many
+# packages call ci-helpers with:
+#
+#   source ci-helpers/travis/setup_conda_$TRAVIS_OS_NAME.sh
+#
+# The present script was added later.
+
+if [[ $DEBUG == True ]]; then
+    set -x
+fi
+
+# First check: if the build should be run at all based on the event type
+
+if [[ ! -z $EVENT_TYPE ]]; then
+    for event in $EVENT_TYPE; do
+        if [[ $TRAVIS_EVENT_TYPE = $event ]]; then
+            allow_to_build=True
+        fi
+    done
+    if [[ $allow_to_build != True ]]; then
+        travis_terminate 0
+    fi
+fi
+
+# Second check: if any of the custom tags are used to skip the build
+
+TR_SKIP="\[(skip travis|travis skip)\]"
+DOCS_ONLY="\[docs only|build docs\]"
+
+# Travis doesn't provide the commit message of the top of the branch for
+# PRs, only the commit message of the merge. Thus this ugly workaround is
+# needed for now.
+
+if [[ $TRAVIS_PULL_REQUEST == false ]]; then
+    COMMIT_MESSAGE=${TRAVIS_COMMIT_MESSAGE}
+else
+    COMMIT_MESSAGE=$(git show -s $TRAVIS_COMMIT_RANGE | awk 'BEGIN{count=0}{if ($1=="Author:") count++; if (count==1) print $0}')
+fi
+
+# Skip build if the commit message contains [skip travis] or [travis skip]
+# Remove workaround once travis has this feature natively
+# https://github.com/travis-ci/travis-ci/issues/5032
+
+if [[ ! -z $(echo ${COMMIT_MESSAGE} | grep -E "${TR_SKIP}") ]]; then
+    echo "Travis was requested to be skipped by the commit message, exiting."
+    travis_terminate 0
+elif [[ ! -z $(echo ${COMMIT_MESSAGE} | grep -E "${DOCS_ONLY}") ]]; then
+    if [[ $SETUP_CMD != *build_docs* ]] && [[ $SETUP_CMD != *build_sphinx* ]]; then
+        echo "Only docs build was requested by the commit message, exiting."
+        travis_terminate 0
+    fi
+fi
+
+echo "==================== Starting executing ci-helpers scripts ====================="
+
+source travis/setup_conda_$TRAVIS_OS_NAME.sh;
+
+echo "================= Returning executing local .travis.yml script ================="
+
+set +x

travis/setup_conda_linux.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Install conda
+# http://conda.pydata.org/docs/travis.html#the-travis-yml-file
+echo ls -la $HOME/miniconda
+ls -la $HOME/miniconda
+if [ ! "$(ls -A $HOME/miniconda)" ]; then
+    echo "Cache is empty, installing miniconda and test environment."
+    # Control will enter here if $HOME/miniconda is empty.
+    rm -r $HOME/miniconda
+    wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
+    bash miniconda.sh -b -p $HOME/miniconda
+
+    export PATH="$HOME/miniconda/bin:$PATH"
+
+    hash -r
+
+    conda env create -f tardis_env27.yml
+else
+    export PATH="$HOME/miniconda/bin:$PATH"
+fi
+
+source activate tardis

travis/setup_conda_osx.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Workaround for https://github.com/travis-ci/travis-ci/issues/6307, which
+# caused the following error on MacOS X workers:
+#
+# /Users/travis/build.sh: line 109: shell_session_update: command not found
+#
+rvm get head
+
+# Install conda
+# http://conda.pydata.org/docs/travis.html#the-travis-yml-file
+echo ls -la $HOME/miniconda
+ls -la $HOME/miniconda
+if [ ! "$(ls -A $HOME/miniconda)" ]; then
+    echo "Cache is empty, installing miniconda and test environment."
+    # Control will enter here if $HOME/miniconda is empty.
+    rm -r $HOME/miniconda
+    # Control will enter here if $HOME/miniconda doesn't exist.
+    wget https://repo.continuum.io/miniconda/Miniconda3-latest-MacOSX-x86_64.sh -O miniconda.sh
+
+    export PATH="$HOME/miniconda/bin:$PATH"
+
+    hash -r
+
+    conda env create -f tardis_env27.yml
+else
+    export PATH="$HOME/miniconda/bin:$PATH"
+fi
+
+source activate tardis