Add a Makefile to auto-build everything in a headless environment

Makefile

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+# To use this file, run:
+#
+# $ make CONFIGURE_FLAGS="-Dplugin.path=/path/to/your/eclipse/plugins"
+#
+# For example, on Debian GNU/Linux:
+#
+# $ make CONFIGURE_FLAGS="-Dplugin.path=/usr/lib/eclipse:/usr/share/eclipse/dropins/jdt"
+#
+# You can also add e.g. "-DforceContextQualifier=none" to make the jars be
+# output under a stable filename.
+#
+# Due to https://github.com/zhourenjian/java2script/issues/7 you may need to
+# run this using xvfb https://packages.debian.org/sid/xvfb
+#
+CONFIGURE_FLAGS +=
+CORE_FLAGS += -DjavacFailOnError=true
+INCUBATOR_FLAGS += -DjavacFailOnError=true -DjavacSource=1.6 -DjavacTarget=1.6
+
+# Order is important; dependencies must go earlier.
+CORE_PLUGINS = net.sf.j2s.core net.sf.j2s.ajax net.sf.j2s.ui net.sf.j2s.lib
+INCUBATOR_PLUGINS = net.sf.j2s.ui.template.velocity net.sf.j2s.ui.cmdline
+CORE_J2SLIB = net.sf.j2s.ajax net.sf.j2s.java.core net.sf.j2s.java.org.eclipse.swt
+
+BUILD_WORKSPACE := $(PWD)/autobuild
+ECLIPSE_AUTO = eclipse \
+	-configuration $(BUILD_WORKSPACE)/configuration \
+	-user $(BUILD_WORKSPACE) \
+	-data $(BUILD_WORKSPACE) \
+	-nosplash -clean
+
+ECLIPSE_ANT = $(ECLIPSE_AUTO) \
+	-application org.eclipse.ant.core.antRunner
+ECLIPSE_ANT_BUILD = $(ECLIPSE_ANT) build.update.jar
+ECLIPSE_ANT_CLEAN = if [ -f build.xml ]; then \
+	$(ECLIPSE_ANT) clean; \
+	rm -rf build.xml javaCompiler...args; \
+fi
+ECLIPSE_J2S = $(ECLIPSE_AUTO) \
+	-application net.sf.j2s.ui.cmdlineApi
+
+all: build-libs
+
+configure:
+	$(ECLIPSE_ANT) -f configure.xml $(CONFIGURE_FLAGS)
+
+build-plugins: configure
+	set -e; for i in $(CORE_PLUGINS:%=sources/%); do \
+		( cd $$i && $(ECLIPSE_ANT_BUILD) $(CORE_FLAGS); ) \
+	done
+	set -e; for i in $(INCUBATOR_PLUGINS:%=incubator/%); do \
+		( cd $$i && $(ECLIPSE_ANT_BUILD) $(INCUBATOR_FLAGS); ) \
+	done
+
+local-install-plugins: build-plugins
+	$(MAKE) DESTDIR=$(BUILD_WORKSPACE) datadir= install
+	mkdir -p $(BUILD_WORKSPACE)/features
+	touch $(BUILD_WORKSPACE)/artifacts.xml
+	$(ECLIPSE_AUTO) -initialize
+
+build-libs: local-install-plugins
+# TODO: The java.core build segfaults quite often, but sometimes works :(
+	set -e; for i in $(CORE_J2SLIB); do \
+		$(ECLIPSE_J2S) -cmd build -path $$PWD/sources/$$i; \
+	done
+	mkdir -p sources/net.sf.j2s.lib/bin
+	cd sources/net.sf.j2s.lib/bin && jar xf ../library.jar
+	cd sources/net.sf.j2s.lib && ant -f build/build.xml
+	cd sources/net.sf.j2s.lib && zip -r j2slib.zip j2slib
+
+clean:
+	for i in $(INCUBATOR_PLUGINS:%=incubator/%); do \
+		( cd $$i && $(ECLIPSE_ANT_CLEAN); ) \
+	done
+	for i in $(CORE_PLUGINS:%=sources/%); do \
+		( cd $$i && $(ECLIPSE_ANT_CLEAN); ) \
+	done
+	rm -rf $(BUILD_WORKSPACE)/.metadata
+
+prefix ?= /usr/local
+datadir ?= $(prefix)/share/eclipse
+pluginsdir ?= $(datadir)/plugins
+
+install:
+	test -z "$(DESTDIR)$(pluginsdir)" || mkdir -p "$(DESTDIR)$(pluginsdir)"
+	install -t "$(DESTDIR)$(pluginsdir)" \
+	$(join $(CORE_PLUGINS:%=sources/%/),$(CORE_PLUGINS:%=%_2.0.0.jar)) \
+	$(join $(INCUBATOR_PLUGINS:%=incubator/%/),$(INCUBATOR_PLUGINS:%=%_1.0.0.*.jar))
+
+.PHONY: all configure build-plugins local-install-plugins build-libs clean install

configure.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project name="java2script" default="configure" basedir=".">
+<!-- IMPORTANT!
+
+This is not a normal ant build file. You need to run it via the Eclipse
+AntRunner, like this Unix shell example:
+
+$ eclipse -nosplash -clean \
+  -configuration $PWD/autobuild/configuration \
+  -user $PWD/autobuild \
+  -data $PWD/autobuild \
+  -application org.eclipse.ant.core.antRunner \
+  -buildfile build.xml \
+  -Dplugin.path=/usr/lib/eclipse:/usr/share/eclipse/dropins/jdt
+
+Setting the -configuration, -user, and -data options are important in an
+automated build process where you don't want to clobber the default locations.
+
+For more details see http://help.eclipse.org/kepler/index.jsp?topic=%2Forg.eclipse.pde.doc.user%2Ftasks%2Fpde_feature_generating_antcommandline.htm
+-->
+<target name="configure">
+<eclipse.buildScript elements="plugin@net.sf.j2s.core"
+		buildDirectory="sources"
+		pluginPath="${plugin.path}"
+		forceContextQualifier="${forceContextQualifier}" />
+<eclipse.buildScript elements="plugin@net.sf.j2s.ajax"
+		buildDirectory="sources"
+		pluginPath="${plugin.path}"
+		forceContextQualifier="${forceContextQualifier}" />
+<eclipse.buildScript elements="plugin@net.sf.j2s.lib"
+		buildDirectory="sources"
+		pluginPath="${plugin.path}"
+		forceContextQualifier="${forceContextQualifier}" />
+<eclipse.buildScript elements="plugin@net.sf.j2s.ui"
+		buildDirectory="sources"
+		pluginPath="${plugin.path}"
+		forceContextQualifier="${forceContextQualifier}" />
+<eclipse.buildScript elements="plugin@net.sf.j2s.ui.template.velocity"
+		buildDirectory="incubator"
+		pluginPath="${plugin.path}${path.separator}sources"
+		forceContextQualifier="${forceContextQualifier}" />
+<eclipse.buildScript elements="plugin@net.sf.j2s.ui.cmdline"
+		buildDirectory="incubator"
+		pluginPath="${plugin.path}${path.separator}sources"
+		forceContextQualifier="${forceContextQualifier}" />
+</target>
+</project>