From bd7c67a54136b51607963f1b04e924db31351268 Mon Sep 17 00:00:00 2001
From: Gilles Dubochet <gilles.dubochet@epfl.ch>
Date: Fri, 4 Nov 2005 16:43:49 +0000
Subject: skip.nsc can be used when building a non-workin...

skip.nsc can be used when building a non-working version of nsc.
---
 build.readme |  7 +++++++
 build.xml    | 28 +++++++++++++++++-----------
 2 files changed, 24 insertions(+), 11 deletions(-)

diff --git a/build.readme b/build.readme
index 54b2fdb1ff..925093061b 100644
--- a/build.readme
+++ b/build.readme
@@ -41,6 +41,13 @@ insufficient for Scala compilation. The ANT_OPTS environment variable needs to
 be set to increase the memory size (either each time as in the quick start
 example above, or once and for all in the default shell environment).
 
+Skipping parts of the build
+
+In some cases, parts of the build process should be disabled for debug reasons:
+  - skip.doc will not build the LaTeX documentation.
+  - skip.nsc will not build anything with NSC. This will create a non-working
+             distribution.
+
 BUILDING NEW SCALA
 
 The 'build' target builds all the Scala library and tools. It is composed of the
diff --git a/build.xml b/build.xml
index 864f35c020..7ebd1177c0 100644
--- a/build.xml
+++ b/build.xml
@@ -156,9 +156,16 @@
     <target name="build" depends="build.jars"
             description="Builds new Scala (compiler and library)."/>
     
-    <target name="build.pico.nslib" depends="init.pico"
-            description="Builds the runtime and pico libraries of the new Scala library.">
+    <target name="build.init">
+        <mkdir dir="${build.dir}"/>
         <mkdir dir="${build.pico-nslib.dir}"/>
+        <mkdir dir="${build.nslib.dir}"/>
+        <mkdir dir="${build.osc-nstools.dir}"/>
+        <mkdir dir="${build.nstools.dir}"/>
+    </target>
+    
+    <target name="build.pico.nslib" depends="init.pico, build.init"
+            description="Builds the runtime and pico libraries of the new Scala library.">
         <pico srcdir="${sources.dir}" destdir="${build.pico-nslib.dir}"
               scalahack="true">
             <classpath>
@@ -185,9 +192,8 @@
         </delete>
     </target>
 
-    <target name="build.osc.nstools" depends="init.osc"
+    <target name="build.osc.nstools" depends="init.osc, build.init"
             description="Builds the new Scala compiler.">
-        <mkdir dir="${build.osc-nstools.dir}"/>
         <osc srcdir="${sources.dir}" destdir="${build.osc-nstools.dir}"
              excludesfile="${nsc.osc-nstools.excludes}"
              force="changed">
@@ -205,9 +211,9 @@
         </osc>
     </target>
 
-    <target name="build.nsc.nslib" depends="init.nsc, build.pico.nslib"
+    <target name="build.nsc.nslib" depends="init.nsc, build.pico.nslib, build.init"
+            unless="skip.nsc"
             description="Builds the Scala library with the new Scala compiler.">
-        <mkdir dir="${build.nslib.dir}"/>
         <nsc srcdir="${sources.dir}" destdir="${build.nslib.dir}"
              usepredefs="false"
              stop="${nsc.stop}" skip="${nsc.skip}" check="${nsc.check}" log="${nsc.log}"
@@ -240,9 +246,9 @@
         </nsc>
     </target>
     
-    <target name="build.nsc.nstools" depends="init.nsc, build.nsc.nslib"
+    <target name="build.nsc.nstools" depends="init.nsc, build.nsc.nslib, build.init"
+            unless="skip.nsc"
             description="Builds the Scala tools (NSC and Scalap) with the new Scala compiler.">
-        <mkdir dir="${build.nstools.dir}"/>
         <nsc srcdir="${sources.dir}" destdir="${build.nstools.dir}"
              excludesfile="${nsc.nstools.excludes}"
              stop="${nsc.stop}" skip="${nsc.skip}" check="${nsc.check}" log="${nsc.log}"
@@ -260,9 +266,8 @@
     </target>
 
     <target name="build.jars"
-            depends="build.nsc.nslib, build.nsc.nstools, build.osc.nstools, build.pico.nslib"
+            depends="build.nsc.nslib, build.nsc.nstools, build.osc.nstools, build.pico.nslib, build.init"
             description="Builds JAR archives for all elements of Scala">
-        <mkdir dir="${build.dir}"/>
         <jar destfile="${build.dir}/${osc-nstools.jar.name}" index="yes" update="yes"
              basedir="${build.osc-nstools.dir}">
             <manifest>
@@ -442,6 +447,7 @@
     
     <target name="distrib.all.init"
             depends="docs">
+        <fail if="skip.nsc">A full distribution cannot be build when skipping NSC.</fail>
         <property name="os.unix" value="yes"/>
         <property name="os.win" value="yes"/>
         <property name="os.mac" value="yes"/>
@@ -602,7 +608,7 @@
     #####################################################################
     -->
     
-    <target name="docs" description="Generates all documentation." unless="docs.skip">
+    <target name="docs" description="Generates all documentation." unless="skip.doc">
         <echo level="verbose">oslib.jar=${oslib.jar}</echo>
         <echo level="verbose">oslib.src=${oslib.src}</echo>
         <echo level="verbose">ostools.jar=${ostools.jar}</echo>
-- 
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