command: Fix backend config override validation #25960
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When loading a backend config override file, init was doing two things wrong: - First, if the file failed to parse, we accidentally didn't return, which caused a panic due to the parsed body being nil; - Secondly, we were overzealous with the validation of the file, allowing only attributes. While most backend configs are attributes only, the enhanced remote backend body also contains a `workspaces` block, which we need to support here. This commit fixes the first bug with an early return and adds test cases for missing file and intentionally-blank filename (to clear the config). We also add a schema validation for the backend block, based on the backend schema itself. This requires constructing an HCL body schema so that we can call `Content` and check for diagnostic errors. The result is more useful errors when an invalid backend config override file is used, while also supporting the enhanced remote backend config fully. Does not include tests specific to the remote backend, because the mocking involved to allow the backend to fully initialize is too involved to be worth it.
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mildwonkey
approved these changes
Aug 24, 2020
This was referenced Aug 24, 2020
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When loading a backend config override file, init was doing two things wrong:
workspacesblock, which we need to support here.This commit fixes the first bug with an early return and adds test cases for missing file and intentionally-blank filename (to clear the config).
We also add a schema validation for the backend block, based on the backend schema itself. This requires constructing an HCL body schema so that we can call
Contentand check for diagnostic errors.The result is more useful errors when an invalid backend config override file is used, while also supporting the enhanced remote backend config fully.
Does not include tests specific to the remote backend, because the mocking involved to allow the backend to fully initialize is too involved to be worth it. Here's what that looks like: 159cdd3
Fixes #25793