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author | Jaka Hudoklin <jaka@gatehub.net> | 2019-03-26 12:33:43 +0100 |
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committer | Jaka Hudoklin <jakahudoklin@gmail.com> | 2019-04-06 14:16:40 +0200 |
commit | c1f0d1978567ff02a07ad6c91647517024af1f09 (patch) | |
tree | d4b6659def8079bb2c2d79791f626bfa6cd37948 /pkgs/build-support/docker | |
parent | 373488e6f4c3dc3bb51cabcb959e4a70eb5d7b2c (diff) | |
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dockerTools: add nix-prefetch-docker script
Diffstat (limited to 'pkgs/build-support/docker')
-rwxr-xr-x | pkgs/build-support/docker/nix-prefetch-docker | 173 | ||||
-rw-r--r-- | pkgs/build-support/docker/nix-prefetch-docker.nix | 26 |
2 files changed, 199 insertions, 0 deletions
diff --git a/pkgs/build-support/docker/nix-prefetch-docker b/pkgs/build-support/docker/nix-prefetch-docker new file mode 100755 index 00000000000..839dc87487a --- /dev/null +++ b/pkgs/build-support/docker/nix-prefetch-docker @@ -0,0 +1,173 @@ +#! /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 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 --override-os ${os} --override-arch ${arch} copy "$sourceUrl" "docker-archive://$tmpFile:$finalImageName:$finalImageTag" +else + skopeo --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" + echo "-> ImageDigest: $imageDigest" + echo "-> FinalImageName: $finalImageName" + echo "-> FinalImageTag: $finalImageTag" + echo "-> ImagePath: $finalPath" + echo "-> ImageHash: $imageHash" +fi + +if [ "$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 diff --git a/pkgs/build-support/docker/nix-prefetch-docker.nix b/pkgs/build-support/docker/nix-prefetch-docker.nix new file mode 100644 index 00000000000..03a936e08e0 --- /dev/null +++ b/pkgs/build-support/docker/nix-prefetch-docker.nix @@ -0,0 +1,26 @@ +{ stdenv, makeWrapper, nix, skopeo }: + +with stdenv.lib; + +stdenv.mkDerivation { + name = "nix-prefetch-docker"; + + nativeBuildInputs = [ makeWrapper ]; + + unpackPhase = ":"; + + installPhase = '' + install -vD ${./nix-prefetch-docker} $out/bin/$name; + wrapProgram $out/bin/$name \ + --prefix PATH : ${makeBinPath [ nix skopeo ]} \ + --set HOME /homeless-shelter + ''; + + preferLocalBuild = true; + + meta = { + description = "Script used to obtain source hashes for dockerTools.pullImage"; + maintainers = with maintainers; [ offline ]; + platforms = platforms.unix; + }; +} |