Experimental implementation of the supermin appliance (passes most tests).

[libguestfs.git] / appliance / supermin-split.sh.in

diff --git a/appliance/supermin-split.sh.in b/appliance/supermin-split.sh.in
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+#!/bin/bash -
+# @configure_input@
+# Copyright (C) 2009 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+# Decide which files will stay in the supermin appliance and which
+# files will be pulled out of the host at runtime.
+#
+# Read the README file!
+#
+# The basic idea is that we create two output files, one containing
+# the files that will stay, and the other listing the files that
+# will be pulled from the host (ie. not go into the appliance now).
+#
+# The list of files that stay ('supermin.incfiles') is just a straight
+# list of files and directories.
+#
+# The list of files that come from the host ('*.supermin.hostfiles')
+# can include wildcards, to allow libraries to be upgraded on the
+# host.
+
+unset CDPATH
+
+set -e
+
+cd @top_builddir@/initramfs
+
+incfiles=../appliance/supermin.incfiles
+hostfiles=../appliance/initramfs.@REPO@.@host_cpu@.supermin.hostfiles
+
+exec 5>$incfiles
+exec 6>$hostfiles
+
+# Note currently the initramfs contains ~2500 files, and none have
+# "funny characters" in the names.  So this is reasonable just to
+# simplify the script.
+for path in $(find -not -name fakeroot.log); do
+    dir=$(dirname "$path")
+    file=$(basename "$path")
+
+    # All we're going to keep are the special files /init, the daemon,
+    # configuration files (/etc), devices and modifiable stuff (/var).
+    if [ "$path" = "./init" -o "$file" = "guestfsd" ]; then
+       echo "$path" >&5
+
+    elif [[ "$path" =~ '^\./etc' || "$path" =~ '^./dev' || "$path" =~ '^\./var' ]]; then
+       echo "$path" >&5
+
+    # Kernel modules are always copied in from the host, including all
+    # the dependency files.
+    elif [[ "$path" =~ '^\./lib/modules/' ]]; then
+       :
+
+    elif [ -d "$path" ]; then
+       # Always write directory names to both output files.
+       echo "$path" >&5
+       echo "$path" >&6
+
+    # Some libraries need fixed version numbers replaced by wildcards.
+
+    elif [[ "$file" =~ '^ld-[.0-9]+\.so$' ]]; then
+       echo "$dir/ld-*.so" >&6
+
+    # libfoo-1.2.3.so
+    elif [[ "$file" =~ '^lib(.*)-[-.0-9]+\.so$' ]]; then
+       echo "$dir/lib${BASH_REMATCH[1]}-*.so" >&6
+
+    # libfoo-1.2.3.so.1.2.3 (but NOT '*.so.N')
+    elif [[ "$file" =~ '^lib(.*)-[-.0-9]+\.so\.([0-9]+)\.' ]]; then
+       echo "$dir/lib${BASH_REMATCH[1]}-*.so.${BASH_REMATCH[2]}.*" >&6
+
+    # libfoo.so.1.2.3 (but NOT '*.so.N')
+    elif [[ "$file" =~ '^lib(.*)\.so\.([0-9]+)\.' ]]; then
+       echo "$dir/lib${BASH_REMATCH[1]}.so.${BASH_REMATCH[2]}.*" >&6
+
+    else
+       # Anything else comes from the host directly.
+       echo "$path" >&6
+    fi
+done