Enforce '--no-show-signature' on git-log timestamp retrieval

[riton]

Context

I've experienced a problem building the copier project from source using the poetry build command.

copier uses poetry-dynamic-versioning.

The poetry build command fails with the following error:

copier on  HEAD (9735f73) [!] 
❯ poetry build

time data "gpg: Signature made Wed Oct 12 14:41:26 2022 CEST\ngpg:                using EDDSA key 83C8FC19286635F94800F1CBE47E3BE44B940490\ngpg: Can't check signature: No public key\n2022-10-12T14:41:21+0200" does not match format '%Y-%m-%dT%H:%M:%S%z'

The git command that is at the origin of the problem is:

copier on  HEAD (9735f73) [!] 
❯ git log -n 1 --pretty=format:"%cI"
gpg: Signature made Wed Oct 12 14:41:26 2022 CEST
gpg:                using EDDSA key 83C8FC19286635F94800F1CBE47E3BE44B940490
gpg: Can't check signature: No public key
2022-10-12T14:41:21+02:00

The gpg signature headers get in the way of the timestamp retrieval logic.

My git configuration

This signature is displayed because I do have

[log]
  showSignature = true

in my ~/.gitconfig file.

Can I reproduce with other projects ?

I was able to reproduce the problem with other projects relying on poetry-dynamic-versioning.

Proposed solution

I know that the root cause of the problem is the showSignature = true setting in my ~/.gitconfig file.

But if we enforce the --no-show-signature git-log flag, we ensures that no Signature message could get in the way of the git-log timestamp parsing logic.

copier on  HEAD (9735f73) [!] 
❯ git log --no-show-signature -n 1 --pretty=format:"%cI"
2022-10-12T14:41:21+02:00

[mtkennerly]

Thank you for the fix and detailed explanation! I'll release this shortly.