Implement Solr 5.x-7.x testing via Docker

Adds a docker-compose.yml, Dockerfile, and Solr configuration skeleton
for testing Pysolr against Solr 5.x, 6.x, and 7.x. Testing against Solr
4.x is still implemented using the start-solr-test-server.sh script and
a local download of Solr 4.

Due to time constraints, this does not include tests for Pysolr's SolrCloud
support for Solr 5.x+. These tests have been marked as "failure allowed"
in the Travis configuration, so that they don't break build status in
the short-term.

.travis.yml

@@ -1,40 +1,57 @@
-sudo: false
+sudo: required
 language: python
 python:
-    - "2.7"
-    - "3.3"
-    - "3.4"
-    - "3.5"
-    - "3.6"
-    - "pypy"
+  - "2.7"
+  - "3.3"
+  - "3.4"
+  - "3.5"
+  - "3.6"
+  - "pypy"
 
 cache:
   apt: true
   pip: true
   directories:
-      - $HOME/download-cache
+    - $HOME/download-cache
 
 env:
-    - SOLRCLOUD=false
-    - SOLRCLOUD=true
+  - SOLR_VERSION="4.10.4" SOLRCLOUD=false
+  - SOLR_VERSION="4.10.4" SOLRCLOUD=true
+  - SOLR_VERSION="5.5" SOLRCLOUD=false
+  - SOLR_VERSION="5.5" SOLRCLOUD=true
+  - SOLR_VERSION="6.6" SOLRCLOUD=false
+  - SOLR_VERSION="6.6" SOLRCLOUD=true
+  - SOLR_VERSION="7.1" SOLRCLOUD=false
+  - SOLR_VERSION="7.1" SOLRCLOUD=true
 
 matrix:
-    allow_failures:
-        - python: 'pypy'
+  allow_failures:
+    - env: SOLR_VERSION="5.5" SOLRCLOUD=true
+    - env: SOLR_VERSION="6.6" SOLRCLOUD=true
+    - env: SOLR_VERSION="7.1" SOLRCLOUD=false
+    - env: SOLR_VERSION="7.1" SOLRCLOUD=true
+    - python: 'pypy'
+
+services:
+  - docker
 
 addons:
   apt_packages:
     - default-jdk
 
+before_install:
+  - sudo apt-get update
+  - sudo apt-get install docker-ce
+
 install:
-    - "pip install 'requests>2'"
-    - "pip install ."
-    - 'if [[ $TRAVIS_PYTHON_VERSION == "2.7" ]]; then travis_retry pip install faulthandler; fi'
-    - 'if [[ "${SOLRCLOUD:-false}" == "true" ]]; then pip install -e .[solrcloud]; fi'
+  - "pip install 'requests>2'"
+  - "pip install ."
+  - 'if [[ $TRAVIS_PYTHON_VERSION == "2.7" ]]; then travis_retry pip install faulthandler; fi'
+  - 'if [[ "${SOLRCLOUD:-false}" == "true" ]]; then pip install -e .[solrcloud]; fi'
 
 script:
-    - python run-tests.py
+  - python run-tests.py
 
 notifications:
-    # irc: "irc.freenode.org#pysolr"
-    email: false
+  # irc: "irc.freenode.org#pysolr"
+  email: false

docker-compose.yml

@@ -0,0 +1,33 @@
+version: '2'
+
+services:
+  solr-base:
+    restart: "no"
+    build:
+      context: ./docker
+    ports:
+      - "8983:8983"
+
+  solr-5.5:
+    extends: solr-base
+    build:
+      args:
+        PY_SOLR_VERSION: 5.5
+
+  solr-6.6:
+    extends: solr-base
+    build:
+      args:
+        PY_SOLR_VERSION: 6.6
+
+  solr-7.0:
+    extends: solr-base
+    build:
+      args:
+        PY_SOLR_VERSION: 7.0
+
+  solr-7.1:
+    extends: solr-base
+    build:
+      args:
+        PY_SOLR_VERSION: 7.1

docker/Dockerfile

@@ -0,0 +1,15 @@
+ARG PY_SOLR_VERSION
+FROM solr:${PY_SOLR_VERSION}
+
+ARG PY_SOLR_VERSION
+
+ENV CORES_DIR /opt/solr/server/solr
+
+USER root
+COPY ./cores $CORES_DIR
+
+# rewrite solrconfig.xml luceneMatchVersion to match current version and re-chown
+RUN perl -p -i -e "s|<luceneMatchVersion>.*</luceneMatchVersion>|<luceneMatchVersion>${SOLR_VERSION}</luceneMatchVersion>|"g ${CORES_DIR}/core0/conf/solrconfig.xml && \
+    chown -R solr:solr $CORES_DIR
+
+USER solr

docker/cores/core0/conf/currency.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" ?>
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<!-- Example exchange rates file for CurrencyField type named "currency" in example schema -->
+
+<currencyConfig version="1.0">
+  <rates>
+    <!-- Updated from http://www.exchangerate.com/ at 2011-09-27 -->
+    <rate from="USD" to="ARS" rate="4.333871" comment="ARGENTINA Peso" />
+    <rate from="USD" to="AUD" rate="1.025768" comment="AUSTRALIA Dollar" />
+    <rate from="USD" to="EUR" rate="0.743676" comment="European Euro" />
+    <rate from="USD" to="BRL" rate="1.881093" comment="BRAZIL Real" />
+    <rate from="USD" to="CAD" rate="1.030815" comment="CANADA Dollar" />
+    <rate from="USD" to="CLP" rate="519.0996" comment="CHILE Peso" />
+    <rate from="USD" to="CNY" rate="6.387310" comment="CHINA Yuan" />
+    <rate from="USD" to="CZK" rate="18.47134" comment="CZECH REP. Koruna" />
+    <rate from="USD" to="DKK" rate="5.515436" comment="DENMARK Krone" />
+    <rate from="USD" to="HKD" rate="7.801922" comment="HONG KONG Dollar" />
+    <rate from="USD" to="HUF" rate="215.6169" comment="HUNGARY Forint" />
+    <rate from="USD" to="ISK" rate="118.1280" comment="ICELAND Krona" />
+    <rate from="USD" to="INR" rate="49.49088" comment="INDIA Rupee" />
+    <rate from="USD" to="XDR" rate="0.641358" comment="INTNL MON. FUND SDR" />
+    <rate from="USD" to="ILS" rate="3.709739" comment="ISRAEL Sheqel" />
+    <rate from="USD" to="JPY" rate="76.32419" comment="JAPAN Yen" />
+    <rate from="USD" to="KRW" rate="1169.173" comment="KOREA (SOUTH) Won" />
+    <rate from="USD" to="KWD" rate="0.275142" comment="KUWAIT Dinar" />
+    <rate from="USD" to="MXN" rate="13.85895" comment="MEXICO Peso" />
+    <rate from="USD" to="NZD" rate="1.285159" comment="NEW ZEALAND Dollar" />
+    <rate from="USD" to="NOK" rate="5.859035" comment="NORWAY Krone" />
+    <rate from="USD" to="PKR" rate="87.57007" comment="PAKISTAN Rupee" />
+    <rate from="USD" to="PEN" rate="2.730683" comment="PERU Sol" />
+    <rate from="USD" to="PHP" rate="43.62039" comment="PHILIPPINES Peso" />
+    <rate from="USD" to="PLN" rate="3.310139" comment="POLAND Zloty" />
+    <rate from="USD" to="RON" rate="3.100932" comment="ROMANIA Leu" />
+    <rate from="USD" to="RUB" rate="32.14663" comment="RUSSIA Ruble" />
+    <rate from="USD" to="SAR" rate="3.750465" comment="SAUDI ARABIA Riyal" />
+    <rate from="USD" to="SGD" rate="1.299352" comment="SINGAPORE Dollar" />
+    <rate from="USD" to="ZAR" rate="8.329761" comment="SOUTH AFRICA Rand" />
+    <rate from="USD" to="SEK" rate="6.883442" comment="SWEDEN Krona" />
+    <rate from="USD" to="CHF" rate="0.906035" comment="SWITZERLAND Franc" />
+    <rate from="USD" to="TWD" rate="30.40283" comment="TAIWAN Dollar" />
+    <rate from="USD" to="THB" rate="30.89487" comment="THAILAND Baht" />
+    <rate from="USD" to="AED" rate="3.672955" comment="U.A.E. Dirham" />
+    <rate from="USD" to="UAH" rate="7.988582" comment="UKRAINE Hryvnia" />
+    <rate from="USD" to="GBP" rate="0.647910" comment="UNITED KINGDOM Pound" />
+
+    <!-- Cross-rates for some common currencies -->
+    <rate from="EUR" to="GBP" rate="0.869914" />  
+    <rate from="EUR" to="NOK" rate="7.800095" />  
+    <rate from="GBP" to="NOK" rate="8.966508" />  
+  </rates>
+</currencyConfig>

docker/cores/core0/conf/elevate.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<!-- If this file is found in the config directory, it will only be
+     loaded once at startup.  If it is found in Solr's data
+     directory, it will be re-loaded every commit.
+
+   See http://wiki.apache.org/solr/QueryElevationComponent for more info
+
+-->
+<elevate>
+ <query text="foo bar">
+  <doc id="1" />
+  <doc id="2" />
+  <doc id="3" />
+ </query>
+
+ <query text="ipod">
+   <doc id="MA147LL/A" />  <!-- put the actual ipod at the top -->
+   <doc id="IW-02" exclude="true" /> <!-- exclude this cable -->
+ </query>
+
+</elevate>