[bug#63985] [PATCH RFC 0/5] Generic INI serializer & SRFI-171 for define-configuration

[Bruno Victal <mirai@makinata.eu>]

This RFC patch series (more like 3 patch series for the price of 1)
implements the following:

* Serializer Keyword arguments parameter in define-configuration.
  Allows for serializing procedures to be specified as:
    (define* (serialize-string field-name value #:key …)
      …)
  Examples in the unit tests.

* Express serialize-configuration with SRFI-171 transducers.
  The ‘base-transducer’ can be used to craft more specialized
  configuration record serializers.

* Generic INI serializer.
  This procedure can be used for crafting INI files from a
  record-type defined with define-configuration.
  Example for generic-ini in action can be found in the unit test.


These changes are motivated in part by a (in progress) refactoring of
the NetworkManager service-type.

Notes:
* I've left Generic-INI and serializer-kwargs undocumented since this
  is at its RFC stage.
* The (gnu services configuration generic-ini) module contains some trailing
  notes that should be removed before merging in.
* jami-account->alist explicitly checks for the empty-string.
  (which I consider to be a serialization “artifact” arising from define-maybe)
  This is the only (relevant) test that failed and will need to be investigated.

Bruno Victal (5):
  services: configuration: Simplify normalize-extra-args.
  services: configuration: Use transducers within
    serialize-configuration.
  services: fstrim-service-type: Serialize with SRFI-171 transducers.
  services: configuration: Add serializer-kwargs field.
  services: configuration: New generic-ini module.

 Makefile.am                                  |   1 +
 gnu/local.mk                                 |   1 +
 gnu/services/configuration.scm               |  86 +++++++++----
 gnu/services/configuration/generic-ini.scm   | 129 +++++++++++++++++++
 gnu/services/linux.scm                       |  11 +-
 tests/services/configuration.scm             |  38 +++++-
 tests/services/configuration/generic-ini.scm | 106 +++++++++++++++
 7 files changed, 333 insertions(+), 39 deletions(-)
 create mode 100644 gnu/services/configuration/generic-ini.scm
 create mode 100644 tests/services/configuration/generic-ini.scm


base-commit: c348b1be3891e6eb47bbdd9fc1587aba2b6ab0b7
-- 
2.39.2