48a5bb703d
In some cases the $sourceRoot is missing. Skip the hook instead
of showing the following cryptic error:
find: cannot search `': No such file or directory
/nix/store/0p1afvl8jcpi6dvsq2n58i90w9c59vz1-set-source-date-epoch-to-latest.sh: line 12: [: : integer expression expected
vcunat removed the warning; the hook will just skip silently in these cases.
Perhaps someone can improve on it some time.
33 lines
1.2 KiB
Bash
33 lines
1.2 KiB
Bash
updateSourceDateEpoch() {
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local path="$1"
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# Get the last modification time of all regular files, sort them,
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# and get the most recent. Maybe we should use
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# https://github.com/0-wiz-0/findnewest here.
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local -a res=($(find "$path" -type f -print0 | xargs -0 -r stat -c '%Y %n' | sort -n | tail -n1))
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local time="${res[0]}"
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local newestFile="${res[1]}"
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# Update $SOURCE_DATE_EPOCH if the most recent file we found is newer.
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if [ "$time" -gt "$SOURCE_DATE_EPOCH" ]; then
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echo "setting SOURCE_DATE_EPOCH to timestamp $time of file $newestFile"
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export SOURCE_DATE_EPOCH="$time"
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# Warn if the new timestamp is too close to the present. This
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# may indicate that we were being applied to a file generated
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# during the build, or that an unpacker didn't restore
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# timestamps properly.
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local now="$(date +%s)"
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if [ "$time" -gt $((now - 60)) ]; then
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echo "warning: file $newestFile may be generated; SOURCE_DATE_EPOCH may be non-deterministic"
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fi
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fi
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}
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postUnpackHooks+=(_updateSourceDateEpochFromSourceRoot)
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_updateSourceDateEpochFromSourceRoot() {
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if [ -n "$sourceRoot" ]; then
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updateSourceDateEpoch "$sourceRoot"
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fi
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}
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