Extract PSI to separate module

compiler/psi/buildLexer.xml

@@ -0,0 +1,57 @@
+<project name="KotlinLexer" default="lexer">
+    <property name="home" value="${basedir}"/>
+    <property name="builddir" value="${basedir}/build"/>
+    <property name="flex.classpath" value=""/>
+    <property name="out.dir" value="${builddir}/tmpout"/>
+
+    <macrodef name="flex">
+      <attribute name="flexfile"/>
+      <attribute name="destdir"/>
+      <attribute name="skeleton" default="${builddir}/idea-flex.skeleton"/>
+      <sequential>
+        <delete dir="${out.dir}"/>
+        <mkdir dir="${out.dir}"/>
+        <java classname="jflex.Main"
+              jvmargs="-Xmx512M"
+              fork="true"
+              failonerror="true">
+          <arg value="-skel"/>
+          <arg value="@{skeleton}"/>
+          <arg value="-d"/>
+          <arg value="${out.dir}"/>
+          <arg value="@{flexfile}"/>
+          <classpath>
+            <pathelement path="${flex.classpath}"/>
+          </classpath>
+        </java>
+        <move todir="@{destdir}">
+          <fileset dir="${out.dir}">
+            <include name="*.java"/>
+          </fileset>
+        </move>
+        <delete dir="${out.dir}"/>
+      </sequential>
+    </macrodef>
+
+    <target name="check-idea-flex.skeleton.exists">
+        <available file="${builddir}/idea-flex.skeleton" property="skeleton.exists"/>
+    </target>
+
+    <target name="get-idea-flex.skeleton.if.not.exists" depends="check-idea-flex.skeleton.exists" unless="skjeleton.exisits">
+        <get src="https://raw.github.com/JetBrains/intellij-community/master/tools/lexer/idea-flex.skeleton"
+             dest="${builddir}/idea-flex.skeleton" usetimestamp="true"/>
+    </target>
+
+    <target name="lexer" depends="get-idea-flex.skeleton.if.not.exists">
+        <flex flexfile="${home}/src/org/jetbrains/kotlin/lexer/Kotlin.flex"
+              destdir="${home}/src/org/jetbrains/kotlin/lexer/"/>
+
+        <!-- This is a hack, but we don't want to alter the skeleton we are using now, because being in sync with IDEA is more important-->
+        <replaceregexp file="${home}/src/org/jetbrains/kotlin/lexer/_JetLexer.java"
+                       match="throw new KotlinLexerException\(message\);"
+                       replace="throw new KotlinLexerException(message + &quot;\\\\n at '&quot; + yytext() + &quot;'\\\\n&quot; + zzBuffer);"/>
+
+        <flex flexfile="${home}/src/org/jetbrains/kotlin/kdoc/lexer/KDoc.flex"
+              destdir="${home}/src/org/jetbrains/kotlin/kdoc/lexer/"/>
+    </target>
+</project>