mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-17 19:21:04 +00:00
32 lines
1.2 KiB
Bash
32 lines
1.2 KiB
Bash
|
updateSourceDateEpoch() {
|
||
|
|
local path="$1"
|
||
|
|
|
||
|
|
# Get the last modification time of all regular files, sort them,
|
||
|
|
# and get the most recent. Maybe we should use
|
||
|
|
# https://github.com/0-wiz-0/findnewest here.
|
||
|
|
local -a res=($(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"
|
||
|
|
}
|