PluginsSummaryBuilder cannot build a changelog with GIT SHAs

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP1
• Fix Version/s: 7.0.1 CE GA2
• Component/s: Dev Tools, Dev Tools > Plugins SDK
• Labels: None
• Fix Priority: 5
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/38409

The PluginsSummaryBuilder fails with the following error code when two GIT SHAs are used for commit range:
If a range of SHA1^..HEAD= the changelog will build successfully.

$ ant build-summary
Buildfile: /Users/jeffreyyang/projects/liferay-plugins-ee/build.xml

build-summary:
     [java] Loading jar:file:/Users/jeffreyyang/projects/bundles/tomcat-8.0.32/webapps/ROOT/WEB-INF/lib/portal-impl.jar!/system.properties
     [java] Loading jar:file:/Users/jeffreyyang/projects/bundles/tomcat-8.0.32/webapps/ROOT/WEB-INF/lib/portal-impl.jar!/portal.properties
     [java] Loading jar:file:/Users/jeffreyyang/projects/bundles/tomcat-8.0.32/webapps/ROOT/WEB-INF/lib/portal-impl.jar!/com/liferay/portal/tools/dependencies/portal-tools.properties
     [java] java.lang.NullPointerException
     [java] 	at java.lang.String.contains(String.java:2076)
     [java] 	at com.liferay.portal.tools.PluginsSummaryBuilder._updateRelengChangeLogFile(PluginsSummaryBuilder.java:438)
     [java] 	at com.liferay.portal.tools.PluginsSummaryBuilder._readReleng(PluginsSummaryBuilder.java:391)
     [java] 	at com.liferay.portal.tools.PluginsSummaryBuilder._createPluginSummary(PluginsSummaryBuilder.java:167)
     [java] 	at com.liferay.portal.tools.PluginsSummaryBuilder._createPluginsSummary(PluginsSummaryBuilder.java:97)
     [java] 	at com.liferay.portal.tools.PluginsSummaryBuilder._createPluginsSummary(PluginsSummaryBuilder.java:85)
     [java] 	at com.liferay.portal.tools.PluginsSummaryBuilder.<init>(PluginsSummaryBuilder.java:61)
     [java] 	at com.liferay.portal.tools.PluginsSummaryBuilder.main(PluginsSummaryBuilder.java:50)

BUILD SUCCESSFUL