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Re: split bootstrap in two phases, GNU tar

From: Bruno Haible
Subject: Re: split bootstrap in two phases, GNU tar
Date: Sun, 24 Jul 2022 18:09:30 +0200

Hi dear GNU tar developers (Sergey et al.),

The 'bootstrap' script from Gnulib has been reorganized to work in two phases:
  (1) Fetch auxiliary files that are not in the git checkout.
      This is the part that requires network access and that has
      supply-chain concerns.
  (2) Generate files such as configure, config.h, Makefile.in etc.
      This includes running gnulib-tool.

See <https://lists.gnu.org/archive/html/bug-gnulib/2022-07/msg00053.html> for

For GNU tar some adjustment of the bootstrap.conf is needed. The bootstrap.conf
is meant to contain configuration settings, that is, define variables and
functions (hooks with special meanings). Instead, tar/bootstrap.conf does the
actions directly. This will not work satisfactorily with the new two-phase
bootstrap. What is needed, is to move these actions into hooks:
  - Actions that may require network access belong in the
    bootstrap_post_pull_hook function.
  - Actions that merely regenerate files (without network access) usually
    belong in the bootstrap_post_import_hook.

These adjustments will be needed the next time you use the '--bootstrap-sync'


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