From: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
To: bitbake-devel@lists.openembedded.org
Date: Wed,  9 Mar 2016 00:53:57 +0100
Message-Id: <cover.1457481171.git.pkj@axis.com>
Subject: [PATCH 0/1] Make the fetcher expand checksums
Precedence: list

We needed a way to override the checksums for a recipe from a
configuration file, e.g., local.conf. I first tried the naive:

    SRC_URI_pn-myrecipe[md5sum] = "123abc..."
    SRC_URI_pn-myrecipe[sha256sum] = "abcd1234..."

which of course did not work. Then I modified the recipe as:

    SRC_URI = "http://.../${PN}-${PV}.tar.gz"

    MD5SUM = "123abc..."
    SHA256SUM = "abcd1234..."

    SRC_URI[md5sum] = "${MD5SUM}"
    SRC_URI[sha256sum] = "${SHA256SUM}"

which I had assumed would work, but it did not. Finally I tried:

    MD5SUM = "123abc..."
    SHA256SUM = "abcd1234..."

    SRC_URI = "http://.../${PN}-${PV}.tar.gz;md5sum=${MD5SUM};sha256sum=${SHA256SUM}"

which actually did work.

Looking into why the second solution above did not work it turned out
that the fetcher code called d.getVarFlag("SRC_URI", ..., False),
i.e., without expanding the checksum values. I cannot see any reason
not to expand the values, so the following patch does that.

//Peter

The following changes since commit 5ac3dc76a5afc2ed35b1abfc8e330e0c580eadf0:

  image.bbclass: fix incomplete .rootfs customization (2016-03-07 22:10:54 +0000)

are available in the git repository at:

  git://git.yoctoproject.org/poky-contrib pkj/expand_checksums
  http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=pkj/expand_checksums

Peter Kjellerstedt (1):
  fetch2: Make SRC_URI[md5sum] and SRC_URI[sha256sum] expand their
    values

 bitbake/lib/bb/fetch2/__init__.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.1.0