mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-05 13:23:17 +00:00
824c9ac5c9
Without this change, the `--os` and `--arch` switches are disregarded for operations involving `skopeo inspect` invocations. This means that, for example, one cannot fetch Linux images while on macOS.
174 lines
4.1 KiB
Bash
Executable File
174 lines
4.1 KiB
Bash
Executable File
#! /usr/bin/env bash
|
|
|
|
set -e -o pipefail
|
|
|
|
os=
|
|
arch=
|
|
imageName=
|
|
imageTag=
|
|
imageDigest=
|
|
finalImageName=
|
|
finalImageTag=
|
|
hashType=$NIX_HASH_ALGO
|
|
hashFormat=$hashFormat
|
|
format=nix
|
|
|
|
usage(){
|
|
echo >&2 "syntax: nix-prefetch-docker [options] [IMAGE_NAME [IMAGE_TAG|IMAGE_DIGEST]]
|
|
|
|
Options:
|
|
--os os OS to fetch image for
|
|
--arch linux Arch to fetch image for
|
|
--image-name name Name of the image to fetch
|
|
--image-tag tag Image tag
|
|
--image-digest digest Image digest
|
|
--final-image-name name Desired name of the image
|
|
--final-image-tag tag Desired image tag
|
|
--json Output result in json format instead of nix
|
|
--quiet Only print the final result
|
|
"
|
|
exit 1
|
|
}
|
|
|
|
get_image_digest(){
|
|
local imageName=$1
|
|
local imageTag=$2
|
|
|
|
if test -z "$imageTag"; then
|
|
imageTag="latest"
|
|
fi
|
|
|
|
skopeo --override-os "${os}" --override-arch "${arch}" --insecure-policy --tmpdir=$TMPDIR inspect "docker://$imageName:$imageTag" | jq '.Digest' -r
|
|
}
|
|
|
|
get_name() {
|
|
local imageName=$1
|
|
local imageTag=$2
|
|
|
|
echo "docker-image-$(echo "$imageName:$imageTag" | tr '/:' '-').tar"
|
|
}
|
|
|
|
argi=0
|
|
argfun=""
|
|
for arg; do
|
|
if test -z "$argfun"; then
|
|
case $arg in
|
|
--os) argfun=set_os;;
|
|
--arch) argfun=set_arch;;
|
|
--image-name) argfun=set_imageName;;
|
|
--image-tag) argfun=set_imageTag;;
|
|
--image-digest) argfun=set_imageDigest;;
|
|
--final-image-name) argfun=set_finalImageName;;
|
|
--final-image-tag) argfun=set_finalImageTag;;
|
|
--quiet) QUIET=true;;
|
|
--json) format=json;;
|
|
--help) usage; exit;;
|
|
*)
|
|
: $((++argi))
|
|
case $argi in
|
|
1) imageName=$arg;;
|
|
2) [[ $arg == *"sha256"* ]] && imageDigest=$arg || imageTag=$arg;;
|
|
*) exit 1;;
|
|
esac
|
|
;;
|
|
esac
|
|
else
|
|
case $argfun in
|
|
set_*)
|
|
var=${argfun#set_}
|
|
eval $var=$arg
|
|
;;
|
|
esac
|
|
argfun=""
|
|
fi
|
|
done
|
|
|
|
if test -z "$imageName"; then
|
|
usage
|
|
fi
|
|
|
|
if test -z "$os"; then
|
|
os=linux
|
|
fi
|
|
|
|
if test -z "$arch"; then
|
|
arch=amd64
|
|
fi
|
|
|
|
if test -z "$hashType"; then
|
|
hashType=sha256
|
|
fi
|
|
|
|
if test -z "$hashFormat"; then
|
|
hashFormat=base32
|
|
fi
|
|
|
|
if test -z "$finalImageName"; then
|
|
finalImageName="$imageName"
|
|
fi
|
|
|
|
if test -z "$finalImageTag"; then
|
|
if test -z "$imageTag"; then
|
|
finalImageTag="latest"
|
|
else
|
|
finalImageTag="$imageTag"
|
|
fi
|
|
fi
|
|
|
|
if test -z "$imageDigest"; then
|
|
imageDigest=$(get_image_digest $imageName $imageTag)
|
|
fi
|
|
|
|
sourceUrl="docker://$imageName@$imageDigest"
|
|
|
|
tmpPath="$(mktemp -d "${TMPDIR:-/tmp}/skopeo-copy-tmp-XXXXXXXX")"
|
|
trap "rm -rf \"$tmpPath\"" EXIT
|
|
|
|
tmpFile="$tmpPath/$(get_name $finalImageName $finalImageTag)"
|
|
|
|
if test -z "$QUIET"; then
|
|
skopeo --insecure-policy --tmpdir=$TMPDIR --override-os ${os} --override-arch ${arch} copy "$sourceUrl" "docker-archive://$tmpFile:$finalImageName:$finalImageTag" >&2
|
|
else
|
|
skopeo --insecure-policy --tmpdir=$TMPDIR --override-os ${os} --override-arch ${arch} copy "$sourceUrl" "docker-archive://$tmpFile:$finalImageName:$finalImageTag" > /dev/null
|
|
fi
|
|
|
|
# Compute the hash.
|
|
imageHash=$(nix-hash --flat --type $hashType --base32 "$tmpFile")
|
|
|
|
# Add the downloaded file to Nix store.
|
|
finalPath=$(nix-store --add-fixed "$hashType" "$tmpFile")
|
|
|
|
if test -z "$QUIET"; then
|
|
echo "-> ImageName: $imageName" >&2
|
|
echo "-> ImageDigest: $imageDigest" >&2
|
|
echo "-> FinalImageName: $finalImageName" >&2
|
|
echo "-> FinalImageTag: $finalImageTag" >&2
|
|
echo "-> ImagePath: $finalPath" >&2
|
|
echo "-> ImageHash: $imageHash" >&2
|
|
fi
|
|
|
|
if [ "$format" == "nix" ]; then
|
|
cat <<EOF
|
|
{
|
|
imageName = "$imageName";
|
|
imageDigest = "$imageDigest";
|
|
sha256 = "$imageHash";
|
|
finalImageName = "$finalImageName";
|
|
finalImageTag = "$finalImageTag";
|
|
}
|
|
EOF
|
|
|
|
else
|
|
|
|
cat <<EOF
|
|
{
|
|
"imageName": "$imageName",
|
|
"imageDigest": "$imageDigest",
|
|
"sha256": "$imageHash",
|
|
"finalImageName": "$finalImageName",
|
|
"finalImageTag": "$finalImageTag"
|
|
}
|
|
EOF
|
|
|
|
fi
|