tjh.dev
1if [ -e .attrs.sh ]; then source .attrs.sh; fi
2source "${stdenv}/setup"
3echo "exporting ${repository}/${imageName} (tag: ${tag}) into ${out}"
4mkdir -p "${out}"
5
6cat <<EOF > "${out}/compositeImage.sh"
7#! ${bash}/bin/bash
8#
9# Create a tar archive of a docker image's layers, docker image config
10# json, manifest.json, and repositories json; this streams directly to
11# stdout and is intended to be used in concert with docker load, i.e:
12#
13# ${out}/compositeImage.sh | docker load
14
15# The first character follow the 's' command for sed becomes the
16# delimiter sed will use; this makes the transformation regex easy to
17# read. We feed tar a file listing the files we want in the archive,
18# because the paths are absolute and docker load wants them flattened in
19# the archive, we need to transform all of the paths going in by
20# stripping everything *including* the last solidus so that we end up
21# with the basename of the path.
22${gnutar}/bin/tar \
23 --transform='s=.*/==' \
24 --transform="s=.*-manifest.json=manifest.json=" \
25 --transform="s=.*-repositories=repositories=" \
26 -c "${manifest}" "${repositories}" -T "${imageFileStorePaths}"
27EOF
28chmod +x "${out}/compositeImage.sh"