appliance: Don't hard-code febootstrap --exclude parameters.

Create a separate file 'excludelist.in' that contains these
regular expressions, and process it the same way as packagelist.in.

.gitignore

@@ -2,6 +2,7 @@
 *.a
 ABOUT-NLS
 aclocal.m4
+appliance/excludelist
 appliance/make.sh
 appliance/packagelist
 appliance/stamp-supermin

appliance/Makefile.am

@@ -19,6 +19,7 @@ include $(top_srcdir)/subdir-rules.mk
 
 EXTRA_DIST = \
 	packagelist.in \
+	excludelist.in \
 	init \
 	make.sh.in
 
@@ -46,8 +47,13 @@ packagelist: packagelist.in
 	grep -v '^[[:space:]]*$$' | grep -v '^#' > $@-t
 	mv $@-t $@
 
+excludelist: excludelist.in
+	cpp -undef -D$(DISTRO)=1 < $< | \
+	grep -v '^[[:space:]]*$$' | grep -v '^#' > $@-t
+	mv $@-t $@
+
 supermin.d/base.img supermin.d/hostfiles: stamp-supermin
-stamp-supermin: make.sh packagelist
+stamp-supermin: make.sh packagelist excludelist
 	mkdir -p supermin.d
 	rm -f $@ supermin.d/base.img supermin.d/hostfiles
 	./make.sh
@@ -70,7 +76,7 @@ supermin.d/init.img: init
 
 # Make clean.
 
-CLEANFILES = packagelist
+CLEANFILES = packagelist excludelist
 
 clean-local:
 	rm -rf supermin.d

appliance/excludelist.in

@@ -0,0 +1,58 @@
+/* This is the list of distro packages which are
+ * excluded from the appliance, even if they appear in
+ * packagelist.in (or more likely, as dependencies of
+ * packages in packagelist.in).
+ *
+ * List is a list of basic regular expressions, one per line.
+ *
+ * This file is processed by cpp with one of the
+ * following symbols defined (depending on the distro):
+ *
+ *   REDHAT=1     For Fedora, RHEL, EPEL and workalikes.
+ *   DEBIAN=1     For Debian.
+ *   UBUNTU=1     For Ubuntu.
+ *   ARCHLINUX=1  For Archlinux.
+ *
+ * Note that any file provided by one of these packages will
+ * be dropped from the appliance.  Of course, this may break
+ * the appliance, so be careful.  Other files are also dropped
+ * from the appliance such as docs and man pages: see 'make.sh.in'
+ * for the full details.
+ */
+
+/* Basically the same with a few minor tweaks. */
+#ifdef UBUNTU
+#define DEBIAN 1
+#endif
+
+/* Don't need any Perl or Python appearing in the appliance. */
+^perl
+^python
+
+/* Plymouth is a graphical boot thing - not needed. */
+^plymouth
+
+/* Replacements for SysVinit.  We don't use ordinary init in the
+ * appliance.
+ */
+^upstart
+^systemd
+
+/* Linux firmware.  Note that febootstrap itself excludes the kernel
+ * which is also not needed since we get the kernel, modules etc
+ * from the host at appliance boot.
+ */
+^linux-firmware
+
+/* Keyboard maps - appliance is not interactive. */
+^kbd-misc
+
+#ifdef REDHAT
+^fedora-logos
+^redhat-logos
+^dracut
+#endif
+
+#ifdef DEBIAN
+^file-rc
+#endif

appliance/make.sh.in

@@ -20,11 +20,12 @@ unset CDPATH
 
 set -e
 
-# XXX Distro-dependent in future.
-excludes="--exclude ^perl --exclude ^python --exclude ^fedora-logos --exclude ^redhat-logos --exclude ^dracut --exclude ^upstart --exclude ^plymouth --exclude ^systemd --exclude ^linux-firmware --exclude ^kbd-misc"
-
-# For Debian:
-excludes="$excludes --exclude ^file-rc"
+# Turn excludelist file into command line arguments.
+exec 5<excludelist
+while read regexp <&5; do
+    excludes="$excludes --exclude $regexp"
+done
+exec 5<&-
 
 # Run febootstrap on the package list.
 if [ "x@FEBOOTSTRAP_YUM_CONFIG@" != "xno" ]; then

appliance/packagelist.in

@@ -8,6 +8,9 @@
  *   DEBIAN=1     For Debian.
  *   UBUNTU=1     For Ubuntu.
  *   ARCHLINUX=1  For Archlinux.
+ *
+ * There is also a list of packages which are excluded if they appear
+ * as dependencies of the packages below.  See: excludelist.in
  */
 
 /* Basically the same with a few minor tweaks. */

configure.ac

@@ -204,7 +204,8 @@ if test "x$enable_appliance" = "xyes"; then
     dnl
     dnl This used to be Very Important but is now just used to select
     dnl which packages to install in the appliance, since the package
-    dnl names vary slightly across distros.  (See appliance/packagelist.in)
+    dnl names vary slightly across distros.  (See
+    dnl appliance/packagelist.in and appliance/excludelist.in)
     AC_MSG_CHECKING([which Linux distro for package names])
     DISTRO=REDHAT
     if test -f /etc/debian_version; then