[Buildroot] [PATCH v2 0/5] Misc utils/genrandconfig improvements

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello,

My starting point for this series was that I wanted to create some
configurations that have BR2_BACKUP_SITE="", so that we do not use the
Buildroot backup mirror, to ensure that upstream locations are still
around.

While implementing this, I realized that all the semi-random
configuration tweaks that we do in gen_config() are in fact completely
overridden by "make randconfig", when genrandconfig is used without
any toolchain CSV.

So I thought it was time for a bit of clean-up:

- Drop some fixups related to toolchains that are no longer tested
  (patch 1)

- Completely remove the support for using a toolchain CSV file. "make
  randconfig" support has been around for quite a while, it gives good
  results, so let's use that as the default now and only use fully
  random configurations (patch 2)

- Adapt the fine-tuning logic to the fact that "make randconfig"
  overwrites everything: move the fine-tuning logic *after* "make
  randconfig", but keep only what makes sense, since "make randconfig"
  already randomizes everything (patch 3)

- Implement what I wanted: set BR2_BACKUP_SITE="" for some builds
  (patch 4)

- Rework the logging of genrandconfig, as it is quite noisy right now,
  but only with irrelevant messages (patch 5)

Changes since v1:

- Fix PATCH 3/5, which was breaking the randomness. Indeed the tuning
  done *after* randconfig was done by overwriting the .config
  entirely, instead of appending to it (open mode was "w+", while it
  should have been "a")

Let me know what you think.

Thomas

Thomas Petazzoni (5):
  utils/genrandconfig: remove fixups related to untested CT-NG
    toolchains
  utils/genrandconfig: remove support for toolchain CSV
  utils/genrandconfig: rework fine-tuning logic
  utils/genrandconfig: do not use BR2_BACKUP_SITE for some builds
  utils/genrandconfig: improve logging

 utils/genrandconfig | 268 ++++++++------------------------------------
 1 file changed, 44 insertions(+), 224 deletions(-)

-- 
2.46.0

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