Implement environment variable interpolation to YAML dictionary keys #1258
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podman-composecurrently does not support interpolating environment variables in dictionary keys, despite the compose file specification indicating this capability.See the relevant compose-spec documentation:
https://github.com/compose-spec/compose-spec/blob/main/12-interpolation.md
This feature is useful in
labelsorenvironmentsections, where keys can be user-defined strings. To enable interpolation, an alternate equal sign syntax must be used, e.g.:After this PR
podman-composewill align more closely with the compose file specification, allowing for the interpolation of environment variables in dictionary keys.This PR completes PR #1240 and fixes issue #708.