feat: Support self-hosted GitHub Enterprise servers

[twpayne]

Fixes #3724.

@joshuaspence would you be able to test this?

[joshuaspence]

It doesn't seem to work, unless I am missing something.

$ chezmoi --version
chezmoi version dev, commit 95f58622290fda3494bf829c7cb5c3a6ea2b7c29, built at 2024-05-02T21:17:02Z

$ chezmoi execute-template '{{ gitHubLatestRelease "REDACTED_HOST/REDACTED_OWNER/REDACTED_REPO" }}'
chezmoi: template: arg1:1:3: executing "arg1" at <gitHubLatestRelease "REDACTED_HOST/REDACTED_OWNER/REDACTED_REPO">: error calling gitHubLatestRelease: GET https://api.github.com/repos/REDACTED_OWNER/REDACTED_REPO/releases/latest: 401 Bad credentials []

It seems like it is ignoring the host.

[joshuaspence]

It does seem to be using the correct access token though, just passing it to the wrong endpoint

[twpayne]

Doh! I forgot to set the URLs. Thanks for testing so quickly. PR updated. Please could you try again (I don't have a server to test against).

[joshuaspence]

Thanks, it works now! Is it possible to have the auth token in a config file rather than polluting my environment? Not a big deal

I am seeing a different error now but I think this one is my fault:

± ~/workspace/chezmoi/chezmoi diff
chezmoi: gzip: invalid header

I verified that chezmoi execute-template '{{ gitHubLatestRelease "REDACTED_HOST/REDACTED_OWNER/REDACTED_REPO" }}' works

[twpayne]

Thanks, it works now!

Great! Thanks for testing!

Is it possible to have the auth token in a config file rather than polluting my environment? Not a big deal

It's technically possible but I'd want to avoid storing secrets in chezmoi's config file. I'd like to think this through and get @halostatue's opinion before adding such a feature.

I am seeing a different error now but I think this one is my fault:

± ~/workspace/chezmoi/chezmoi diff
chezmoi: gzip: invalid header

Maybe. This looks like the returned archive is not in the expected format, or maybe there's an HTTP redirect happening. Could you inspect the contents of the returned data?

[joshuaspence]

Yeah I'm just checking that now. When I download the archive through the browser and use file on it, it shows gzip compressed data, max compression, original size modulo 2^32 87956992. Trying to work out if chezmoi is seeing different data or if there is something else going on

[twpayne]

If you run chezmoi with the --debug flag I think it will show you the first few bytes of each HTTP download.

[joshuaspence]

Ah I see the issue. It's because I am doing this:

url: '{{ (gitHubLatestRelease "REDACTED").HTMLURL | replace "/releases/tag/" "/releases/download/" }}/REDACTED_{{ .chezmoi.os }}_{{ .chezmoi.arch | replace "amd64" "x86_64" }}.tar.gz'

Let me try using gitHubLatestReleaseAssetURL

[joshuaspence]

Nah it doesn't work with gitHubLatestReleaseAssetURL. I guess because whatever is processing externals is just using a generic HTTP client, which won't be injecting the GitHub auth token

[twpayne]

Ah, I see, thank you.

Can you embed the access token into the external URL, something like (untested):

["my/external"]
    url = "https://git.example.com:{{ env "CHEZMOI_GIT_EXAMPLE_COM_ACCESS_TOKEN" }}/path/to/archive"

[joshuaspence]

Nah it doesn't work. GitHub doesn't allow basic auth, you have to pass in an Authorization: Bearer xxxxxxx header instead

[twpayne]

OK, thank you again for testing.

I suspect that the right solution is that chezmoi should add Authentication: Bearer $CHEZMOI_GIT_EXAMPLE_COM_ACCESS_TOKEN headers to all requests to git.example.com, but this will require some thought and refactoring.

[halostatue]

LGTM.

It might be worthwhile to see about being able to use gh auth token if that’s installed, but that’s a separate feature request. It would minimize the need for using CHEZMOI_GITHUB_ACCESS_TOKEN etc.

[halostatue]

We may want to show this as *either *[host-]owner-repo* or *owner-repo*|*host-howner-repo*.

This applies to all github* functions.

[halostatue]

Adding an example for host-owner-repo in addition to owner-repo would be good.

This applies to all github* functions.