Test multiple PARI versions in Travis CI

Author: jdemeyer

.travis-install-pari.sh

@@ -0,0 +1,28 @@
+# Helper script to install PARI for Travis CI
+
+# Exit on error
+set -e
+
+# Figure out PARI version and download location
+# Note that we support giving a list of URLs
+if [ "$PARI_VERSION" = snapshot ]; then
+    PARI_VERSION=$(wget -qO- "http://pari.math.u-bordeaux.fr/pub/pari/snapshots" | sed -n 's/.*href="\(pari-.*-g.*\)[.]tar[.]gz".*/\1/p')
+    URL="http://pari.math.u-bordeaux.fr/pub/pari/snapshots"
+else
+    URL="http://pari.math.u-bordeaux.fr/pub/pari/unix http://pari.math.u-bordeaux.fr/pub/pari/unstable"
+fi
+
+# Download PARI sources
+for url in $URL; do
+    if wget --no-verbose "$url/$PARI_VERSION.tar.gz"; then
+        # Success
+        break
+    fi
+done
+
+# Install
+tar xzf "$PARI_VERSION.tar.gz"
+cd "$PARI_VERSION"
+./Configure --prefix=/usr
+make gp
+sudo make install

.travis.yml

@@ -10,23 +10,21 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
-# non python dependencies
+env:
+  - PARI_VERSION=pari-2.8.1.beta
+  - PARI_VERSION=pari-2.9.3
+  - PARI_VERSION=snapshot
 before_install:
-  - sudo apt-get -qq update
-  - wget http://pari.math.u-bordeaux.fr/pub/pari/unix/pari-2.9.3.tar.gz
-  - tar xf pari-2.9.3.tar.gz
-  - cd pari-2.9.3/
-  - ./Configure --prefix=/usr/
-  - make gp
-  - sudo make install
-  - cd ..
-# command to install dependencies
-install: 
-  - pip install --verbose Cython
-  - pip install --verbose cysignals
-  - pip install --verbose Sphinx
+  - export PATH="/usr/lib/ccache:$PATH"
+  - ccache -M 256M && ccache -s
+install:
+  - bash -x .travis-install-pari.sh
+  - pip install --build=/tmp/pip --verbose -r requirements.txt
   - pip install --verbose .
 # command to run tests
 script:
   - python tests/rundoctest.py
   - (cd docs && make html)
+cache:
+  directories:
+    - $HOME/.ccache