Introduce 'sha256' in BUILDHISTORY_FEATURES and enable it by default
when doing reproducible builds.

When enabled this will additionally create:

  files-in-package-sha256.txt
  files-in-image-sha256.txt
  files-in-sdk-sha256.txt

containing the sha256 checksums of regular files.

Signed-off-by: Jacob Kroon <jacob.kr...@gmail.com>
---
 meta/classes/buildhistory.bbclass | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

Changes in v2:
 * Switch to sha256
 * Let find only build the arguments and execute sha256sum once
 * Use single quotes in inline python code

diff --git a/meta/classes/buildhistory.bbclass 
b/meta/classes/buildhistory.bbclass
index 33eb1b00f6..84f85da0bd 100644
--- a/meta/classes/buildhistory.bbclass
+++ b/meta/classes/buildhistory.bbclass
@@ -7,7 +7,8 @@
 # Copyright (C) 2007-2011 Koen Kooi <k...@openembedded.org>
 #
 
-BUILDHISTORY_FEATURES ?= "image package sdk"
+BUILDHISTORY_FEATURES ?= "image package sdk \
+  ${@ 'sha256' if bb.utils.to_boolean(d.getVar('BUILD_REPRODUCIBLE_BINARIES')) 
else ''}"
 BUILDHISTORY_DIR ?= "${TOPDIR}/buildhistory"
 BUILDHISTORY_DIR_IMAGE = 
"${BUILDHISTORY_DIR}/images/${MACHINE_ARCH}/${TCLIBC}/${IMAGE_BASENAME}"
 BUILDHISTORY_DIR_PACKAGE = 
"${BUILDHISTORY_DIR}/packages/${MULTIMACH_TARGET_SYS}/${PN}"
@@ -526,7 +527,12 @@ buildhistory_list_files() {
                eval ${FAKEROOTENV} ${FAKEROOTCMD} $find_cmd
        else
                eval $find_cmd
-       fi | sort -k5 | sed 's/ * -> $//' > $2 )
+       fi | sort -k5 | sed 's/ * -> $//' > $2
+       if [ "${@bb.utils.contains('BUILDHISTORY_FEATURES', 'sha256', '1', '0', 
d)}" = "1" ] ; then
+               sha256filename=$(echo $2 | sed 's/\.txt$/-sha256.txt/')
+               find -type f -exec sha256sum {} + | sort -k2 > $sha256filename
+               [ -s $sha256filename ] || rm $sha256filename # remove result if 
empty
+       fi )
 }
 
 buildhistory_list_pkg_files() {
-- 
2.11.0

-- 
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