buildhistory.bbclass: Create a files-in-<pkg>.txt containg recipe's pkg files

A file similar (in format) to files-in-image.txt is created for each
recipe's build package. This would allow to easily see what the
recipe's package may install when including it into an image.

These files reside on the specific buildhistory recipe package (i.e.
buildhistory/packages/i586-poky-linux/busybox/busybox-dev/files-in-busybox-dev.txt
for busybox-dev package)

[YOCTO #5870]

(From OE-Core rev: e013fe79cdf67429ff986d8ee6af510b34b31c9d)

Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/buildhistory.bbclass

@@ -242,6 +242,9 @@ python buildhistory_emit_pkghistory() {
         pkginfo.size = int(pkgdata['PKGSIZE'])
 
         write_pkghistory(pkginfo, d)
+
+    # Create files-in-<package-name>.txt files containing a list of files of each recipe's package
+    bb.build.exec_func("buildhistory_list_pkg_files", d)
 }
 
 
@@ -435,6 +438,16 @@ buildhistory_list_files() {
 	( cd $1 && find . -printf "%M %-10u %-10g %10s %p -> %l\n" | sort -k5 | sed 's/ * -> $//' > $2 )
 }
 
+buildhistory_list_pkg_files() {
+        file_prefix="files-in-"
+
+        # Create individual files-in-package for each recipe's package
+        for pkgdir in $(find ${PKGDEST}/* -maxdepth 0 -type d); do
+                pkgname=$(basename ${pkgdir})
+                outfile="${BUILDHISTORY_DIR_PACKAGE}/${pkgname}/${file_prefix}${pkgname}.txt"
+                buildhistory_list_files ${pkgdir} ${outfile}
+        done
+}
 
 buildhistory_get_imageinfo() {
 	if [ "${@bb.utils.contains('BUILDHISTORY_FEATURES', 'image', '1', '0', d)}" = "0" ] ; then