Refs #6930, allow plugins to test against minimum required Piwik version in travis build.

plugins/TestRunner/templates/travis.yml.twig

@@ -90,17 +90,7 @@ install:
   - git clone -q https://github.com/piwik/piwik.git piwik
   - cd piwik
   - git fetch -q --all
-  - | 
-    if [ "$TEST_AGAINST_PIWIK_BRANCH" == "" ]; then
-        if [ "$TEST_AGAINST_CORE" == "latest_stable" ]; then
-            export TEST_AGAINST_PIWIK_BRANCH=$(git describe --tags `git rev-list --tags --max-count=1`)
-            export TEST_AGAINST_PIWIK_BRANCH=`echo $TEST_AGAINST_PIWIK_BRANCH | tr -d ' ' | tr -d '\n'`
-        else
-            export TEST_AGAINST_PIWIK_BRANCH=master
-        fi
-    fi
-  - echo "Testing against '$TEST_AGAINST_PIWIK_BRANCH'"
-  - git checkout "$TEST_AGAINST_PIWIK_BRANCH" -q
+  - ./tests/travis/checkout_test_against_branch.sh
   - git submodule init -q
   - git submodule update -q || true
 {% else %}

tests/travis/checkout_test_against_branch.sh

+#!/bin/bash
+
+SCRIPT_DIR=`dirname $0`
+
+if [ "$TEST_AGAINST_PIWIK_BRANCH" == "" ]; then
+    if [ "$TEST_AGAINST_CORE" == "latest_stable" ]; then # test against the latest stable release of piwik core (including betas & release candidates)
+        export TEST_AGAINST_PIWIK_BRANCH=$(git describe --tags `git rev-list --tags --max-count=1`)
+        export TEST_AGAINST_PIWIK_BRANCH=`echo $TEST_AGAINST_PIWIK_BRANCH | tr -d ' ' | tr -d '\n'`
+    elif [[ "$TEST_AGAINST_CORE" == "minimum_required_piwik" && "$PLUGIN_NAME" != "" ]]; then # test against the minimum required Piwik in the plugin.json file
+        export TEST_AGAINST_PIWIK_BRANCH=$(php "$SCRIPT_DIR/get_required_piwik_version.php" $PLUGIN_NAME)
+    else
+        export TEST_AGAINST_PIWIK_BRANCH=master
+    fi
+fi
+
+echo "Testing against '$TEST_AGAINST_PIWIK_BRANCH'"
+git checkout "$TEST_AGAINST_PIWIK_BRANCH" -q

tests/travis/get_required_piwik_version.php

+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+// tiny script to get plugin version from plugin.json from a bash script
+$pluginName = $argv[1];
+$pluginJsonPath = __DIR__ . "/../../plugins/$pluginName/plugin.json";
+
+$pluginJsonContents = file_get_contents($pluginJsonPath);
+$pluginJsonContents = json_decode($pluginJsonContents, true);
+
+$minimumRequiredPiwik = @$pluginJsonContents["require"]["piwik"];
+
+if (empty($minimumRequiredPiwik)) {
+    $minimumRequiredPiwik = "master";
+} else {
+    if (!preg_match("/^[^0-9]*(.*)/", $minimumRequiredPiwik, $matches)
+        || empty($matches[1])
+    ) {
+        $minimumRequiredPiwik = "master";
+    } else {
+        $minimumRequiredPiwik = $matches[1];
+    }
+}
+
+echo $minimumRequiredPiwik;
\ No newline at end of file