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refac(io) set IO once in main to allow overriding with in memory io i… - #1363
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…n tests `print.Printer` had a reference to a `cobra.Command` for using its IO streams. Each Command also used a Printer, resulting in an awkward circular dependency. Refactored Printer to use IO streams directly. When using the application these are set in `main`, when used in tests these can be set to `bytes.Buffer`s. Also replaced usages of `os.Args` with just a string slice. Also set in `main`. `cobra.Command`s `Args` and IO-streams are set in `NewRootCmd` with `traverseCommands`. `CmdParams` also has an `fs.FS`, currently unused but will allow using the real FS during regular use and an in-memory-FS during tests. This change prepares the application for integrative testing while keeping good isolation. Generally speaking the goal is to move all things with side effects into main (compare with https://grafana.com/blog/how-i-write-http-services-in-go-after-13-years/#func-main-only-calls-run)
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marceljk
approved these changes
Apr 15, 2026
Merging this branch changes the coverage (15 decrease, 4 increase)
Coverage by fileChanged files (no unit tests)
Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code. Changed unit test files
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…n tests
print.Printerhad a reference to acobra.Commandfor using its IO streams. Each Command also used a Printer, resulting in an awkward circular dependency.Refactored Printer to use IO streams directly. When using the application these are set in
main, when used in tests these can be set tobytes.Buffers.Also replaced usages of
os.Argswith just a string slice. Also set inmain.cobra.CommandsArgsand IO-streams are set inNewRootCmdwithtraverseCommands.CmdParamsalso has anfs.FS, currently unused but will allow using the real FS during regular use and an in-memory-FS during tests.This change prepares the application for integrative testing while keeping good isolation. Generally speaking the goal is to move all things with side effects into main (compare with https://grafana.com/blog/how-i-write-http-services-in-go-after-13-years/#func-main-only-calls-run)
Description
relates to #1234
Checklist
make fmtmake generate-docs(will be checked by CI)make test(will be checked by CI)make lint(will be checked by CI)