diff options
| -rw-r--r-- | pkgs/build-support/setup-hooks/set-source-date-epoch-to-latest.sh | 37 | ||||
| -rw-r--r-- | pkgs/stdenv/generic/default.nix | 1 |
2 files changed, 38 insertions, 0 deletions
diff --git a/pkgs/build-support/setup-hooks/set-source-date-epoch-to-latest.sh b/pkgs/build-support/setup-hooks/set-source-date-epoch-to-latest.sh new file mode 100644 index 000000000000..e57848cff558 --- /dev/null +++ b/pkgs/build-support/setup-hooks/set-source-date-epoch-to-latest.sh @@ -0,0 +1,37 @@ +updateSourceDateEpoch() { + local path="$1" + + # FIXME: Support Darwin. + if ! [[ $system =~ linux ]]; then + exit 1 + return + fi + + # Get the last modification time of all regular files, sort them, + # and get the most recent. Maybe we should use + # https://github.com/0-wiz-0/findnewest here. + local -a res=($(find "$path" -type f -print0 | xargs -0 -r stat -c '%Y %n' | sort -n | tail -n1)) + local time="${res[0]}" + local newestFile="${res[1]}" + + # Update $SOURCE_DATE_EPOCH if the most recent file we found is newer. + if [ "$time" -gt "$SOURCE_DATE_EPOCH" ]; then + echo "setting SOURCE_DATE_EPOCH to timestamp $time of file $newestFile" + export SOURCE_DATE_EPOCH="$time" + + # Warn if the new timestamp is too close to the present. This + # may indicate that we were being applied to a file generated + # during the build, or that an unpacker didn't restore + # timestamps properly. + local now="$(date +%s)" + if [ "$time" -gt $((now - 60)) ]; then + echo "warning: file $newestFile may be generated; SOURCE_DATE_EPOCH may be non-deterministic" + fi + fi +} + +postUnpackHooks+=(_updateSourceDateEpochFromSourceRoot) + +_updateSourceDateEpochFromSourceRoot() { + updateSourceDateEpoch "$sourceRoot" +} diff --git a/pkgs/stdenv/generic/default.nix b/pkgs/stdenv/generic/default.nix index 2fb1f8b39ae4..6dc2553db386 100644 --- a/pkgs/stdenv/generic/default.nix +++ b/pkgs/stdenv/generic/default.nix @@ -84,6 +84,7 @@ let ../../build-support/setup-hooks/patch-shebangs.sh ../../build-support/setup-hooks/move-sbin.sh ../../build-support/setup-hooks/move-lib64.sh + ../../build-support/setup-hooks/set-source-date-epoch-to-latest.sh cc ]; |