in-toto attestations (ITE-6) as a formatter.

[kommendorkapten]

This PR deprecates #88.

This PR implements the basic support for #65.
The formatter uses type hinting to be able to extract information to prepare the in-toto attestation.

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Fredrik Skogman (cf077d7, f675af7, a478aa7, cddd232, 5e4f798, c41d031, cc07100, 3cd98a4, 3d2d36e, f94c5ef, 84cc434, 3b4aee0, 4222c4c, 3ffee03, d2af565, 2284cf4, 2121ae0, e9eb3ba, dfbf355, 8df9db5, dde91f4, 793b4fc, 76fdd6a, 1797251, f22441e, 5918f98, 025d7f9, af1752c, c7b7233, 3e5ae04, 499cce3, 146f5f2)
• ✅ dlorenc (97f3506, 62a9033, 01ed89c)

[tekton-robot]

Hi @kommendorkapten. Thanks for your PR.

I'm waiting for a tektoncd member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[kommendorkapten]

I'm working on how to proceed with the CLA with my Employer.

[dlorenc]

/ok-to-test
Yay!

[lukehinds]

Is this ready for review now @kommendorkapten , or still a WIP?

[kommendorkapten]

@lukehinds It's ready for review. Just consider that the functionality provided is MVP. There are some fields in the in-toto attestation that we don't have a good way of populating now based from the information seen in the TaskRun struct. Expect follow up work to improve what fields we can populate (e.g when "Hermekton" is finished, there are a set of attributes in the attestation related to hermeticity in builds we should populate).

[priyawadhwa]

Hey @kommendorkapten this looks great!

[dlorenc]

This is awesome! I'm excited to get this in!

[priyawadhwa]

Hey @kommendorkapten this looks great! Would you mind squashing the commits, and then we can merge?

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: priyawadhwa

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[dlorenc]

It's happening!

[dlorenc]

You might still need to squash this all the way down to one commit to get it to merge

[dlorenc]

/lgtm

[priyawadhwa]

/lgtm