Martin Pitt
edbf043333
Add a `ts_clamp` argument to `copy_tree_at_full()` and `copy_times_full()` that clamps copied inodes to a given time stamp. This is the recommended `$SOURCE_DATE_EPOCH` semantics [1] for reproducible builds. Their non-`_full` APIs keep existing behaviour by clamping to `USEC_INFINITY`. atime and mtime are clamped separately: a file that was merely read after the epoch has to keep its mtime and still lose its atime. E.g. FAT (EFI partition) stores an access date. [1] https://reproducible-builds.org/specs/source-date-epoch/
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