This patch implements a general API to serialize configuration records
to list of pairs representing environment variables. The car of each
pair represents the variable name and the cdr the variable value.
* gnu/services/configuration/environment-variables.scm: New file.
(serialize-string-environment-variable)
(serialize-maybe-string-environment-variable)
(serialize-boolean-environment-variable)
(serialize-maybe-boolean-environment-variable)
(serialize-number-environment-variable)
(serialize-maybe-number-environment-variable): New variables.
(serialize-environment-variables): New variable.
* gnu/services/configuration/utils.scm: New file.
(uglify-snake-case): New variable.
* tests/services/configuration.scm: Add tests for environment serializer.
(wrong type for a field): Adjust error location.
* doc/guix.texi: Document it.
Change-Id: I81a166576f94d3c8f5bf78c82a02183689a3091c
Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>
0b8e838208