[python-committers] Travis-CI compiles twice (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Mon Jul 24 09:48:17 EDT 2017

On 24 July 2017 at 18:55, Victor Stinner <victor.stinner at gmail.com> wrote:

2017-07-24 9:37 GMT+02:00 Serhiy Storchaka <storchaka at gmail.com>:

make regen-all touches header files which are dependencies for all binaries. I suggest to run make regen-all before make. Zachary Ware explained me once that "make regen-all" should be run after "make", but I don't recall why :-)

Some of the generators (including Argument Clinic) are themselves written in Python, so building the checked in version first is the only way to be 100% sure you have a compatible version available.

As Serhiy notes, the robust fix is to make sure the generators leave the file modification times unchanged if they don't actually change anything, either by working entirely in memory and only writing the result back out if it changed, or by generating out-of-place and then doing either a rename (if the result changed), or deleting the new one (if it is the same as the original).

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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