OpenSearch/modules/lang-painless/ant.xml

<?xml version="1.0"?>
<project name="ant-stuff">

<!-- 
 grammar regeneration logic
 we do this with ant for several reasons:
 * remove generated tabs for forbidden-apis
 * remove generated timestamps/filenames for reproducible build
 * fix CRLF line endings for windows consistency
 * ability to make classes package-private
 * keeping in source code control is easier on IDEs
 * regeneration should be rare, no reason to be religious about generated files 
 * all logic already written and battle tested in lucene build
-->
  <target name="regenerate" description="Regenerate antlr lexer and parser" depends="run-antlr"/>

  <target name="run-antlr">
    <regen-delete grammar="Painless"/>
    <regen-lexer grammar="Painless"/>
    <regen-parser grammar="Painless"/>
    <regen-fix grammar="Painless"/>
  </target>

  <macrodef name="replace-value">
    <attribute name="value" />
    <attribute name="property" />
    <attribute name="from" />
    <attribute name="to" />
    <sequential>
      <loadresource property="@{property}">
        <string value="@{value}"/>
        <filterchain>
          <tokenfilter>
            <filetokenizer/>
            <replacestring from="@{from}" to="@{to}"/>
          </tokenfilter>
        </filterchain>
      </loadresource>
    </sequential>
  </macrodef>

  <macrodef name="regen-delete">
    <attribute name="grammar" />
    <sequential>
      <local name="output.path"/>
      <patternset id="grammar.@{grammar}.patternset">
        <include name="@{grammar}Lexer.java" />
        <include name="@{grammar}Parser.java" />
        <include name="@{grammar}ParserVisitor.java" />
        <include name="@{grammar}ParserBaseVisitor.java" />
      </patternset>
      <property name="output.path" location="src/main/java/org/elasticsearch/painless"/>
      <!-- delete parser and lexer so files will be generated -->
      <delete dir="${output.path}">
        <patternset refid="grammar.@{grammar}.patternset"/>
      </delete>
    </sequential>
  </macrodef>

  <macrodef name="regen-lexer">
    <attribute name="grammar" />
    <sequential>
      <local name="grammar.path"/>
      <local name="output.path"/>
      <property name="grammar.path" location="src/main/antlr"/>
      <property name="output.path" location="src/main/java/org/elasticsearch/painless"/>
      <!-- invoke ANTLR4 -->
      <java classname="org.antlr.v4.Tool" fork="true" failonerror="true" classpathref="regenerate.classpath" taskname="antlr">
        <sysproperty key="file.encoding" value="UTF-8"/>
        <sysproperty key="user.language" value="en"/>
        <sysproperty key="user.country" value="US"/>
        <sysproperty key="user.variant" value=""/>
        <arg value="-package"/>
        <arg value="org.elasticsearch.painless"/>
        <arg value="-o"/>
        <arg path="${output.path}"/>
        <arg path="${grammar.path}/@{grammar}Lexer.g4"/>
      </java>
    </sequential>
  </macrodef>

  <macrodef name="regen-parser">
    <attribute name="grammar" />
    <sequential>
      <local name="grammar.path"/>
      <local name="output.path"/>
      <property name="grammar.path" location="src/main/antlr"/>
      <property name="output.path" location="src/main/java/org/elasticsearch/painless"/>
      <!-- invoke ANTLR4 -->
      <java classname="org.antlr.v4.Tool" fork="true" failonerror="true" classpathref="regenerate.classpath" taskname="antlr">
        <sysproperty key="file.encoding" value="UTF-8"/>
        <sysproperty key="user.language" value="en"/>
        <sysproperty key="user.country" value="US"/>
        <sysproperty key="user.variant" value=""/>
        <arg value="-package"/>
        <arg value="org.elasticsearch.painless"/>
        <arg value="-no-listener"/>
        <arg value="-visitor"/>
        <!-- <arg value="-Xlog"/> -->
        <arg value="-o"/>
        <arg path="${output.path}"/>
        <arg path="${grammar.path}/@{grammar}Parser.g4"/>
      </java>
    </sequential>
  </macrodef>

  <macrodef name="regen-fix">
    <attribute name="grammar" />
    <sequential>
      <local name="grammar.path"/>
      <local name="output.path"/>
      <property name="grammar.path" location="src/main/antlr"/>
      <property name="output.path" location="src/main/java/org/elasticsearch/painless"/>
      <patternset id="grammar.@{grammar}.patternset">
        <include name="@{grammar}Lexer.java" />
        <include name="@{grammar}Parser.java" />
        <include name="@{grammar}ParserVisitor.java" />
        <include name="@{grammar}ParserBaseVisitor.java" />
      </patternset>
      <!-- fileset with files to edit -->
      <fileset id="grammar.fileset" dir="${output.path}">
        <patternset refid="grammar.@{grammar}.patternset"/>
      </fileset>
      <!-- remove files that are not needed to compile or at runtime -->
      <delete dir="${grammar.path}" includes="@{grammar}*.tokens"/>
      <delete dir="${output.path}" includes="@{grammar}*.tokens"/>
      <!-- make the generated classes package private -->
      <replaceregexp match="public ((interface|class) \Q@{grammar}\E\w+)" replace="\1" encoding="UTF-8">
        <fileset refid="grammar.fileset"/>
      </replaceregexp>
      <!-- nuke timestamps/filenames in generated files -->
      <replaceregexp match="\Q// Generated from \E.*" replace="\/\/ ANTLR GENERATED CODE: DO NOT EDIT" encoding="UTF-8">
        <fileset refid="grammar.fileset"/>
      </replaceregexp>
      <!-- remove tabs in antlr generated files -->
      <replaceregexp match="\t" flags="g" replace="  " encoding="UTF-8">
        <fileset refid="grammar.fileset"/>
      </replaceregexp>
      <!-- fix line endings -->
      <fixcrlf srcdir="${output.path}">
        <patternset refid="grammar.@{grammar}.patternset"/>
      </fixcrlf>
    </sequential>
  </macrodef>
</project>