Mark Stemm f7f6d72ac0 Rule loader changes to support result objects ...

Changes to the rule loader to support result objects:

- Instead of throwing falco_exception on internal error, throw a
  rule_load_exception instead, which contains distinct
  error/message/context information.

- A context object contains a chain of location structs chaining from
  the document root to the object where the error occurred. Each
  location has a file position (as a YAML::Mark), an item
  type (e.g. "rule", "list", "exception"), and an item name (e.g. "Write
  Below Etc"). This will allow showing the exact location of an
  error (e.g. list item/exception field) while also remembering the item
  that contained it.

- All the _info structs now contain a context so errors that occur
  after yaml parsing can still point to the original location in the
  yaml file.

- rule_loader::result is an implementation of the abstract class
  defined in falco_load_result. The implementation keeps track of a
  list of errors/warnigns that used to be in the configuration object,

- Clean up compile_ methods to just throw rule_load_exceptions or
  return nothing, and ensure that all rule_load_exceptions are caught in
  compile(). When caught, errors are added to the result object.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

2022-08-04 14:49:23 +02:00

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