Implement basic continuous integration test

See ukf/ukf-meta#384.

.gitlab-ci.yml

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+#
+# Continuous integration tests for the ukf-meta repository.
+#
+
+#
+# Default image for all steps is Amazon Corretto 11, which is based
+# on Amazon Linux (a variety of yum-based Linux derived from RHEL 7).
+#
+image: "amazoncorretto:11"
+
+stages:
+  - test
+
+perform-test:
+  stage: test
+  script:
+    #
+    # Install the tools we need that are not provided by the base image.
+    #
+    - yum -y --quiet install ant git libxslt
+
+    #
+    # Create work directories under the current one.
+    #
+    - mkdir -p work/build work/temp
+
+    #
+    # Fetch full UK federation inventory.
+    #
+    # The clone is made with a depth of 1 because we don't need any history.
+    #
+    - git clone --depth=1 https://gitlab-ci-token:$CI_JOB_TOKEN@$CI_SERVER_HOST/ukf/ukf-data.git work/ukf-data
+
+    #
+    # Thin UK federation inventory: retain 100 random entities.
+    #
+    - find work/ukf-data/entities -type f -name uk0\*.xml | sort -R | tail -n +101 | xargs rm
+
+    #
+    # Acquire a copy of the eduGAIN aggregate.
+    #
+    - ant -Denv=ci-download flow.edugain.download
+    - ls -lh work/temp
+
+    #
+    # Thin the eduGAIN aggregate into another file containing just 1% of the original
+    # entities.
+    #
+    - xsltproc -o work/temp/edugain-thin.xml utilities/thin_aggregate.xsl work/temp/edugain-download.xml
+    - ls -lh work/temp
+
+    #
+    # Run the full generate pipeline on the thinned input data.
+    #
+    - ant -Denv=ci-thin flow.aggregates.generate

ci-download.properties

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+#
+# ci-download.properties
+#
+# Properties defined for the env=ci-download environment, the part of the
+# continuous integration job that downloads an eduGAIN aggregate.
+#
+
+# Shared workspace location is assumed to be under the current directory.
+shared.ws.dir=${basedir}/work
+
+#
+# Cached eduGAIN download goes into a different directory so that it
+# persists over comparison runs.
+#
+mda.output.edugain.download=${shared.ws.dir}/temp/edugain-download.xml

ci-thin.properties

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+#
+# ci-thin.properties
+#
+# Properties defined for the env=ci-thin environment, the part of the
+# continuous integration job that runs the test on the thinned data.
+#
+
+# Shared workspace location is assumed to be under the current directory.
+shared.ws.dir=${basedir}/work
+
+#
+# Location of the thinned version of the downloaded eduGAIN aggregate.
+#
+mda.output.edugain.download=${shared.ws.dir}/temp/edugain-thin.xml

utilities/thin_aggregate.xsl

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    thin_aggregate.xsl
+
+    Thins the input aggregate so that only 1% of the entities remain.
+-->
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
+    xmlns:math="http://exslt.org/math">
+
+    <!--
+        Force UTF-8 encoding for the output.
+    -->
+    <xsl:output omit-xml-declaration="no" method="xml" encoding="UTF-8"/>
+
+    <!-- Discard most entities. -->
+    <xsl:template match="md:EntityDescriptor[math:random()>0.01]">
+        <!-- discard -->
+    </xsl:template>
+
+    <!--By default, copy text blocks, comments and attributes unchanged.-->
+    <xsl:template match="text()|comment()|@*">
+        <xsl:copy/>
+    </xsl:template>
+
+    <!--By default, copy all elements from the input to the output, along with their attributes and contents.-->
+    <xsl:template match="*">
+        <xsl:copy>
+            <xsl:apply-templates select="node()|@*"/>
+        </xsl:copy>
+    </xsl:template>
+
+</xsl:stylesheet>