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fs/cpio: generate reproducible archives

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The output of 'find' depends on the directory entries, and is not
ordered. As a consequence, the cpio archive is not reproducible.

Fix that by sorting the output of find. Use the 'C' locale to enforce
reproducibility that does not depend on the locale.

The command line is now pretty long, so we wrap it.

Signed-off-by: Yurii Monakov <monakov.y@gmail.com>
[yann.morin.1998@free.fr:
  - use LC_ALL=C when sorting
  - wrap long line
  - reword commit log
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Yurii Monakov 2020-06-29 15:37:01 +03:00 committed by Yann E. MORIN
parent 16a522b5e0
commit 4728fdd4c0
1 changed files with 5 additions and 1 deletions
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6
fs/cpio/cpio.mk
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@ -37,7 +37,11 @@ ROOTFS_CPIO_OPTS += --reproducible
endif
define ROOTFS_CPIO_CMD
cd $(TARGET_DIR) && find . | cpio $(ROOTFS_CPIO_OPTS) --quiet -o -H newc > $@
cd $(TARGET_DIR) && \
find . \
| LC_ALL=C sort \
| cpio $(ROOTFS_CPIO_OPTS) --quiet -o -H newc \
> $@
endef
ifeq ($(BR2_TARGET_ROOTFS_CPIO_UIMAGE),y)