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Add flag for disabling config printing #269

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merged 4 commits into from Sep 9, 2020

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unguiculus
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@unguiculus unguiculus commented Sep 9, 2020

By default, ct prints the config on startup. This can be problematic
because it may contain senstivie data when helm-repo-extra-args contains
passwords. The new flag enables turning off config printing.

Signed-off-by: Reinhard Nägele unguiculus@gmail.com

By default, ct prints the config on startup. This can be problematic
because it may contain senstivie data when helm-repo-extra-args contains
passwords. The new flag enables turning off config printing. In addition
to that, the config is now printed to stderr.

Signed-off-by: Reinhard Nägele <unguiculus@gmail.com>
ct/cmd/root.go Outdated
@@ -94,4 +94,5 @@ func addCommonLintAndInstallFlags(flags *pflag.FlagSet) {
flags.Bool("debug", false, heredoc.Doc(`
Print CLI calls of external tools to stdout (Note: depending on helm-extra-args
passed, this may reveal sensitive data)`))
flags.Bool("print-config", true, "Prints the configuration to stderr")
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This flag seems a bit not intuitive to me. The default is to print the config (this has a true value). So, you don't pass in the flag to skip it. You have to say it's equal to false. Would it be better to make this --skip-print-config with a value of false? Then use the not of this value for the LoadConfiguration function?

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@unguiculus unguiculus Sep 9, 2020

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Good point. Not sure what's better. Ideally, I'd like to change the default to false. I was hesitant to do so. Would that be considered a breaking change?

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Changing a default value is considered a breaking change. The helm client would only do that on a major version change.

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@scottrigby scottrigby Sep 9, 2020

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This is fun, because we already have a printConfig arg in LoadConfiguration(), but had no actual config/flag for it 😄

Given the security implications I think we should change chart-testing to not print the config values by default. Also thinking whatever flag name we decide is most intuitive for end uses should include a hard to miss note in the flag help/description about what you said initially @unguiculus. Something like:

caution: setting this may expose sensitive data when helm-repo-extra-args contains passwords

I'm a bit torn on the semver interpretation here. If it's considered a security bug, then changing output wouldn't require MAJOR. In that case, the additional flag to output it if desired would only require MINOR. Thoughts on this?

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I agree with @scottrigby. After all it's only a change in log output, not in functionality.

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Cool. Whatever we decide with semver, not printing this by default is the right thing to do

Signed-off-by: Reinhard Nägele <unguiculus@gmail.com>
Signed-off-by: Reinhard Nägele <unguiculus@gmail.com>
Signed-off-by: Reinhard Nägele <unguiculus@gmail.com>
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4 participants