refactor(reverse): dockerfilefromhistory default processor #472
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In order to test and refactor the default case for the raw instruction processor, this change identify the values affected (`inst`and `isExecForm`), and extracts the case body out to a new function. Signed-off-by: Dennis Walters <[email protected]>
Added unit tests for the function that was previously extracted from `DockerfileFromHistory` to ensure refactored behavior. Signed-off-by: Dennis Walters <[email protected]>
* Extracts `processAsUncaughtInst` for handling standard instructions that were given in a non-standard form (as may happen with buildkit, etc) * Extracts `processAsArgsFormat` for handling RUN instructions that were provided in the args format * Extracts `processAsExecRun` for handling commands that were provided in a non-standard way * Extracts `detectRawShellForm` for detecting commands that are shaped like shell form RUN instructions * Extracts `execify` for converting arrays of strings to exec format RUN instructions (and lowering code duplication) * Replaces the body of `processRawInst` to incorporate these extracted functions and generally make the problem easier to reason about and extend Signed-off-by: Dennis Walters <[email protected]>
Signed-off-by: Dennis Walters <[email protected]>
Signed-off-by: Dennis Walters <[email protected]>
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Per the desire expressed in the
TODOin the default raw instruction processing case inDockerfileFromHistory, this adds tests for that processor and refactors it.The end result increases cumulative cyclomatic complexity a few points, but generally drops the complexity of the individual pieces through conditional flattening and code deduplication, provides a clear path towards extension, and generally makes the default processor a good deal easier to reason about.