7845f6ddde
Apparently some newer docker versions crash if there is no "repository" file in the resulting image. Its syntax seems simple enough, described in https://github.com/moby/moby/blob/master/image/spec/v1.md Reported-by: Matthew Singletary <matt.singletary@gmail.com>
45 lines
992 B
Text
45 lines
992 B
Text
redo-ifchange template.json "$1.layers"
|
|
layers=$(cat "$1.layers")
|
|
|
|
dir=$3.tmp
|
|
rm -rf "$dir"
|
|
mkdir -p "$dir"
|
|
|
|
# Build all layers in parallel
|
|
for layer in $layers; do
|
|
echo "$layer.list.sha256"
|
|
echo "$layer.layer"
|
|
done | xargs redo-ifchange
|
|
|
|
ids=
|
|
parent=
|
|
for layer in $layers; do
|
|
read cid <$layer.list.sha256
|
|
echo "layer: $cid $layer" >&2
|
|
|
|
# docker seems to order its image tarballs latest-first,
|
|
# so the base layer is last. We'll create in order from
|
|
# base layer to final layer, but create a tarball in the
|
|
# opposite order.
|
|
ids="$cid $ids" # prepend
|
|
|
|
mkdir "$dir/$cid"
|
|
echo "1.0" >$dir/$cid/VERSION
|
|
./dockjson.py "$layer" "$parent" >$dir/$cid/json
|
|
ln "$layer.layer" "$dir/$cid/layer.tar"
|
|
parent=$layer
|
|
done <$1.layers
|
|
last_cid=$cid
|
|
|
|
# The seemingly-redundant "repositories" file seems to be needed by newer
|
|
# docker versions.
|
|
cat >"$dir/repositories" <<-EOF
|
|
{
|
|
"$2":{
|
|
"latest":"$last_cid"
|
|
}
|
|
}
|
|
EOF
|
|
|
|
tar -C "$dir" -cf - $ids repositories >$3
|
|
rm -rf "$dir"
|