WIP: make printing output easier (approach 1) #3797
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I'm looking if we can make printing output easier, and without linters warning about all the unhandled errors for `fmt.FPrintXX()`. One approach could be to use Cobra's print functions, which are convenient, but the (big!) downside is that we would then have to pass _both_ `cobra.Command` _and_ `command.Cli` everywhere. Looking at our code, it looks like the intent is to separate functionality from cobra (cobra "triggers" the command, but the command itself is agnostic to being called from cobra). The other approach is to - enhance the CLI to have utilities for printing (similar to cobra); `dockerCli.Printf(...)` - enhance the `streams` package to have utilities, but note that while both `dockerCli.Out()` and `dockerCli.Err()` are an `io.Writer`, only `dockerCli.Out()` is a `streams.Out`, so we would have to change `dockerCli.Err()` to also be a `streams.Out`. Maybe there was a reason for not doing so (`streams.Out` can detect if a terminal is attached, maybe that's not possible for `STDERR`, which (unlike `STDOUT` is not buffered? not sure if that makes a difference) Signed-off-by: Sebastiaan van Stijn <[email protected]>
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I'm looking if we can make printing output easier, and without linters warning about all the unhandled errors for
fmt.FPrintXX().One approach could be to use Cobra's print functions, which are convenient, but the (big!) downside is that we would then have to pass both
cobra.Commandandcommand.Clieverywhere.Looking at our code, it looks like the intent is to separate functionality from cobra (cobra "triggers" the command, but the command itself is agnostic to being called from cobra).
The other approach is to
dockerCli.Printf(...)streamspackage to have utilities, but note that while bothdockerCli.Out()anddockerCli.Err()are anio.Writer, onlydockerCli.Out()is astreams.Out, so we would have to changedockerCli.Err()to also be astreams.Out. Maybe there was a reason for not doing so (streams.Outcan detect if a terminal is attached, maybe that's not possible forSTDERR, which (unlikeSTDOUTis not buffered? not sure if that makes a difference)- Description for the changelog
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