[Buildroot] [PATCH 11/13 v2] core/legal-info: generate a hash of all saved files

[Yann E. MORIN]

Having a hash of the saved files can be interesting for the recipient to
verify the integrity of the files.

We remove the warning file earlier, to exclude it from the hash list.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Cc: Luca Ceresoli <luca at lucaceresoli.net>

---
Changes v1 -> v2:
  - simplify getting rid of the ..../legal-info/ prefix  (Luca)
  - always sort with the C locale
---
 Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 8e8514e..cc31211 100644
--- a/Makefile
+++ b/Makefile
@@ -654,8 +654,14 @@ legal-info: dirs legal-info-clean legal-info-prepare $(foreach p,$(PACKAGES),$(p
 		cat support/legal-info/README.warnings-header \
 			$(LEGAL_WARNINGS) >>$(LEGAL_REPORT); \
 		cat $(LEGAL_WARNINGS); fi
-	@echo "Legal info produced in $(LEGAL_INFO_DIR)"
 	@rm -f $(LEGAL_WARNINGS)
+	@(cd $(LEGAL_INFO_DIR); \
+	  find * -type f -exec sha256sum {} + \
+	  |LC_ALL=C sort -k2 \
+	  >.legal-info.sha256; \
+	  mv .legal-info.sha256 legal-info.sha256 \
+	)
+	@echo "Legal info produced in $(LEGAL_INFO_DIR)"
 
 show-targets:
 	@echo $(PACKAGES) $(TARGETS_ROOTFS)
-- 
1.9.1