feat: support for dry-run mode

[mdelapenya]

What does this PR do?

It does a few things to achieve dry-run to work properly:

1. a way to display in a clear manner that dry-run is enabled. For that, we are adding an Infof function to the logger, which uses a new Info color. This color will display the background in Cyan and the foreground in White.
2. a new persistent, DryRun flag, attached to the root command. This flag will be available to all subcommands.
3. a helper function for all the cobra commands and subcommands, that will be run at the PreRun stage. This function will check if the DryRun flag is enabled, and print a message built with the previous blocks.
4. an evaluation of the DryRun flag at all the implementations of the executors, so that the first thing that happens in there is checking if DryRun is true. If so, it will just print the command, arguments and workDir, returning without error. For the case of the ExecuteAndCapture function, it will return the very same string than the above implementation.
5. Finally it add tests for git/github packages, which use the new code

Why is it important?

It will support testing locally changes before submitting real pull requests.

Other considerations

I probably missed some other places where the dry-run mode should be applied. Please point them out to me so that I can update the code.

Related issues

• Closes Allow for 'dry running' commands #38

[rnorth]

Hi @mdelapenya, it's great to see you here 😃

Thanks for the PR - @sledigabel and I will try to review soon!

[mdelapenya]

Hi @mdelapenya, it's great to see you here 😃

Thanks for the PR - @sledigabel and I will try to review soon!

Indeed, my pleasure! I'm evaluating this project to sync common files in multiple repositories. We have a home-baked shell script that does what it's expected, but looking for a more robust solution. And I wanted to give turbolift a try using dry-run mode 😄

Please ask anything you need during the review 🙏

[rnorth]

A few minor comments and suggestions but I like it!

[mdelapenya]

Hi @rnorth sorry for the radio silence, I went on parental leave on Dec 10th, and I was back a few weeks ago.

Returning activity on contributions at a slow pace :)

[rnorth]

From #38:

Since this was created, #94 has come up which we think offers an alternative approach to this problem that is simpler to implement. As such, we'd like to move to close this.

Sorry that we've had this change of heart, but think that #94 would be simpler, as well as easier to integrate. Thanks for your attempt to contribute though, @mdelapenya - I really appreciate your effort.