Re: [tz] Undoing the effect of the new alike-since-1970 patch

On 6/8/21 10:44 AM, Stephen Colebourne via tz wrote:

Are you proposing a makefile option to recreate the original source files using the data in backzone?

Not byte-for-byte copies, no. Just a functional copy containing the equivalent of what the data would have looked like had the new alike-since-1970 patch not been installed. One way to do this would be to generate a file that contains what tzdata.zi does, except it omits the effect of the alike-since-1970 patch. This is basically what Tom Lane was asking for here: https://mm.icann.org/pipermail/tz/2021-June/030198.html and I expect it wouldn't be too hard to automate that.