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reproducible: Don't look for youngest file when no source tarball

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Some packages (eg. init-ifupdown) take their source files entirely from
openembedded-core, that is, they download no source tarball.
These recipes either don't use S at all (ie. it is empty at unpack time),
or they set S = WORKDIR (as in init-ifupdown).
Looking at the file timestamps in the WORKDIR causes a non-reproducible
SOURCE_DATE_EPOCH, as files taken from file:// URIs do not have
reproducible timestamps.

If S == WORKDIR, we are better to assume that there is no source tarball,
and to fall back to a fixed timestamp for the SOURCE_DATE_EPOCH.
This makes the init-ifupdown build reproducible.

(From OE-Core rev: d395bad0179037eb5d0fa4d921985c87ae13f3a4)

(From OE-Core rev: cd56795a1588d780ca6a0cb974bf4024ab636be7)

Signed-off-by: Douglas Royds <douglas.royds@taitradio.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Douglas Royds
2018-11-23 09:41:57 +13:00
committed by Richard Purdie
parent e2a2f8cd89
commit c90a56ed6d
1 changed files with 8 additions and 5 deletions
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13
meta/classes/reproducible_build.bbclass
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@@ -22,7 +22,10 @@
# 3. Use the mtime of "known" files such as NEWS, CHANGLELOG, ...
# This works for well-kept repositories distributed via tarball.
#
# 4. If the above steps fail, use the modification time of the youngest file in the source tree.
# 4. Use the modification time of the youngest file in the source tree, if there is one.
# This will be the newest file from the distribution tarball, if any.
#
# 5. Fall back to a fixed timestamp.
#
# Once the value of SOURCE_DATE_EPOCH is determined, it is stored in the recipe's SDE_FILE.
# If none of these mechanisms are suitable, replace the do_deploy_source_date_epoch task
@@ -104,15 +107,15 @@ def get_source_date_epoch_from_git(d, sourcedir):
return source_date_epoch
def get_source_date_epoch_from_youngest_file(d, sourcedir):
if sourcedir == d.getVar('WORKDIR'):
# These sources are almost certainly not from a tarball
return None
# Do it the hard way: check all files and find the youngest one...
source_date_epoch = None
newest_file = None
# Just in case S = WORKDIR
exclude = set(["build", "image", "license-destdir", "patches", "pseudo",
"recipe-sysroot", "recipe-sysroot-native", "sysroot-destdir", "temp"])
for root, dirs, files in os.walk(sourcedir, topdown=True):
files = [f for f in files if not f[0] == '.']
dirs[:] = [d for d in dirs if d not in exclude]
for fname in files:
filename = os.path.join(root, fname)