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dockerTools: make tars deterministic

Browse Source 
There were two sources of non-determinisim coming into the images. The
first was tar mtimes, the second was pigz/gzip times.

An example image now passes with the --check flag.
This commit is contained in:
Brian McKenna 2016-04-14 22:04:39 +10:00
parent ab428dce14
commit bc2f314f73
1 changed files with 5 additions and 5 deletions
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10
pkgs/build-support/docker/default.nix
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@ -151,7 +151,7 @@ EOF
postMount = ''
echo Packing raw image
tar -C mnt -cf $out .
tar -C mnt --mtime=0 -cf $out .
'';
};
@ -176,7 +176,7 @@ EOF
echo Packing layer
mkdir $out
tar -C layer -cf $out/layer.tar .
tar -C layer --mtime=0 -cf $out/layer.tar .
ts=$(${tarsum} < $out/layer.tar)
cat ${baseJson} | jshon -s "$ts" -i checksum > $out/json
echo -n "1.0" > $out/VERSION
@ -216,7 +216,7 @@ EOF
echo Packing layer
mkdir $out
tar -C layer -cf $out/layer.tar .
tar -C layer --mtime=0 -cf $out/layer.tar .
ts=$(${tarsum} < $out/layer.tar)
cat ${baseJson} | jshon -s "$ts" -i checksum > $out/json
echo -n "1.0" > $out/VERSION
@ -297,7 +297,7 @@ EOF
tar -tf temp/layer.tar >> baseFiles
sed 's/^\.//' -i baseFiles
comm <(sort -n baseFiles|uniq) <(sort -n layerFiles|uniq|grep -v ${layer}) -1 -3 > newFiles
tar -rpf temp/layer.tar --no-recursion --files-from newFiles 2>/dev/null || true
tar -rpf temp/layer.tar --mtime=0 --no-recursion --files-from newFiles 2>/dev/null || true
echo Adding meta
@ -320,7 +320,7 @@ EOF
chmod -R a-w image
echo Cooking the image
tar -C image -c . | pigz > $out
tar -C image --mtime=0 -c . | pigz -nT > $out
'';
in