Substitute empty for unset config env vars without defaults#5408
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Substitute empty for unset config env vars without defaults#5408ocelotl wants to merge 1 commit into
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Looks good. Left one comment regarding allowing empty substitute values which we'll need to resolve.
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Declarative config environment variable substitution rejected any
${VAR} reference to an unset variable that had no default, raising a
ConfigurationError and preventing SDK initialization. The declarative
configuration spec requires an unset variable without a default to be
replaced with an empty value (which YAML then reads as null), matching
the Java and Node.js implementations and allowing config files to be
shared across languages.
Replace the raise with empty substitution. EnvSubstitutionError is kept
as public API for backward compatibility but is no longer raised.
Update tests accordingly.
Fixes open-telemetry#5405
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Description
Fixes #5405.
Declarative config environment variable substitution rejected any
${VAR}reference to an unset variable that had no default, raising aConfigurationErrorand preventing SDK initialization:The declarative configuration spec requires an unset variable without a default to be replaced with an empty value (which the YAML parser then interprets as null). This matches the Java and Node.js implementations and lets configuration files be shared across languages.
Changes
opentelemetry-configuration: an unset${VAR}with no default now substitutes an empty value instead of raising.EnvSubstitutionError(its only raise site is gone) from the module and thefilepackage's public exports.${ENV:-production}still applies its default.Type of change
How Has This Been Tested?
opentelemetry-configurationtest suite (363 passed, 5 subtests).ruff checkandruff format --checkclean on the changed files.Does This PR Require a Contrib Repo Change?
Checklist: