busybox: Enhance to add dynamic per-file provides

When using the RPM package backend, we need a full list of per-file
provides (and requires).  The busybox package provides a number of
command line utilities, such as /usr/bin/env.  However, because
the utilities are created at post install time via scripting the
provide of each of the links was never made.  So any programs,
such as python, that require /usr/bin/env were unable to resolve
the dependency and failed.

This change only affects packaging backends that use per-file
dependency data.  Currently RPM is the only packaging backend
with this ability.

(From OE-Core rev: dd63f64155e0fe41c27a8c9be84dfc0a255a3ff7)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/busybox/busybox.inc

@@ -205,6 +205,38 @@ do_install () {
 	install -m 0644 ${S}/busybox.links ${D}${sysconfdir}
 }
 
+python package_do_filedeps_append () {
+	# We need to load the full set of busybox provides from the /etc/busybox.links
+	# The pkg_postinst_ is what creates the actual links
+
+	pkg = d.getVar('PN', True)
+	f_busybox = "/bin/busybox"
+	f_busybox_links = "/etc/busybox.links"
+
+	requires_files = []
+	provides_files = []
+
+	# Load/backup original set
+	filerprovides = d.getVar('FILERPROVIDES_%s_%s' % (f_busybox, pkg), True) or ""
+
+	dep_pipe = os.popen('sed -e "s,^,Provides: ," %s/%s%s' % (pkgdest, pkg, f_busybox_links))
+
+	process_deps(dep_pipe, pkg, "%s/%s%s" % (pkgdest, pkg, f_busybox), provides_files, requires_files)
+
+	# Add the new set
+	filerprovides += d.getVar('FILERPROVIDES_%s_%s' % (f_busybox, pkg), True) or ""
+
+	# Make sure there is an entry for this item in the FILERPROVIDESFLIST...
+	filerprovidesflist = (d.getVar('FILERPROVIDESFLIST_%s' % pkg, True) or "").split()
+	for file in provides_files:
+		if file not in filerprovidesflist:
+			filerprovidesflist.append(file)
+	d.setVar('FILERPROVIDESFLIST_%s' % pkg, " ".join(filerprovidesflist))
+
+	# Store the new provides
+	d.setVar('FILERPROVIDES_%s_%s' % (f_busybox, pkg), filerprovides)
+}
+
 pkg_postinst_${PN} () {
 	# If we are not making an image we create links for the utilities that doesn't exist
 	# so the update-alternatives script will get the utilities it needs

meta/recipes-core/busybox/busybox_1.18.5.bb

@@ -1,5 +1,5 @@
 require busybox.inc
-PR = "r0"
+PR = "r1"
 
 SRC_URI = "http://www.busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \
            file://udhcpscript.patch \