diff options
Diffstat (limited to 'pkgs/build-support')
| -rw-r--r-- | pkgs/build-support/docker/default.nix | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix index bdc93f3643f..7fa5aeafc8e 100644 --- a/pkgs/build-support/docker/default.nix +++ b/pkgs/build-support/docker/default.nix @@ -229,6 +229,15 @@ rec { mount /dev/${vmTools.hd} disk cd disk + function dedup() { + declare -A seen + while read ln; do + if [[ -z "''${seen["$ln"]:-}" ]]; then + echo "$ln"; seen["$ln"]=1 + fi + done + } + if [[ -n "$fromImage" ]]; then echo "Unpacking base image..." mkdir image @@ -245,7 +254,8 @@ rec { parentID="$(cat "image/manifest.json" | jq -r '.[0].Config | rtrimstr(".json")')" fi - cat ./image/manifest.json | jq -r '.[0].Layers | .[]' > layer-list + # In case of repeated layers, unpack only the last occurrence of each + cat ./image/manifest.json | jq -r '.[0].Layers | .[]' | tac | dedup | tac > layer-list else touch layer-list fi |