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git_writing_an_arbitrary_blob [2019/02/26 13:19] rpjday [The recipe] |
git_writing_an_arbitrary_blob [2019/03/07 10:14] (current) rpjday [Overview] |
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===== Overview ===== | ===== Overview ===== | ||
- | How to write an arbitrary blob to a repository to add "supplemental" information. | + | How to write an arbitrary blob to a repository to add "supplemental" information, such as contact information or your public GPG key, but without making that blob part of the standard history. |
===== The recipe ===== | ===== The recipe ===== | ||
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Robert P. J. Day | Robert P. J. Day | ||
$ | $ | ||
+ | </code> | ||
+ | |||
+ | In fact, this technique is used by Git maintainer Junio Hamano to disseminate his public GPG key with the Git source code: | ||
+ | |||
+ | <code> | ||
+ | $ git show junio-gpg-pub | ||
+ | tag junio-gpg-pub | ||
+ | Tagger: Junio C Hamano <gitster@pobox.com> | ||
+ | Date: Thu Nov 20 15:12:15 2014 -0800 | ||
+ | |||
+ | GPG key to sign git.git archive | ||
+ | |||
+ | This blob contains the GPG public key I use to sign git.git archive. | ||
+ | |||
+ | To use it to verify tags I signed, do: | ||
+ | |||
+ | $ git-cat-file blob junio-gpg-pub | gpg --import | ||
+ | |||
+ | to import it into your keyring, and then | ||
+ | |||
+ | $ git-tag -v $tag_to_be_verified | ||
+ | |||
+ | The fingerprint information for the key is as follows: | ||
+ | |||
+ | $ gpg --fingerprint -k 96AFE6CB\! | ||
+ | pub 4096R/713660A7 2011-10-01 | ||
+ | Key fingerprint = 96E0 7AF2 5771 9559 80DA D100 20D0 4E5A | ||
+ | 7136 60A7 | ||
+ | uid Junio C Hamano <gitster@pobox.com> | ||
+ | uid Junio C Hamano <junio@pobox.com> | ||
+ | uid Junio C Hamano <jch@google.com> | ||
+ | sub 4096R/833262C4 2011-10-01 | ||
+ | sub 4096R/96AFE6CB 2011-10-03 [expires: 2015-09-21] | ||
+ | sub 4096R/B3F7CAC9 2014-09-20 [expires: 2017-09-19] | ||
+ | -----BEGIN PGP SIGNATURE----- | ||
+ | Version: GnuPG v1 | ||
+ | |||
+ | iQIcBAABAgAGBQJUbnV7AAoJELC16IaWr+bLvjYP+wSOG8rp1y77ExHDJQj7HBLm | ||
+ | 9PVQIb70tkiBxAGUpVNNbaoJQBuMAgFdT4Baj8CIo2jdzDeeqbjtcdy/XsHZ3IMl | ||
+ | |||
+ | ... etc etc ... | ||
</code> | </code> |