Can we specify stdin as a datasource?

[ghost]

Use case example:

generates_some_yaml | gomplate --file template.yaml --datasource config=-

[hairyhenderson]

Hi @josdotso, thanks for the feature request! I think this sounds reasonable. I'll see what I can do!

[hairyhenderson]

@josdotso there's a hitch with your suggested syntax... gomplate decides how to parse a datasource based on either the file's MIME type, or file extension. When using stdin, obviously we lose that information.

How about providing a fake filename with a stdin URL scheme? Something like this:

generates_some_yaml | gomplate --file template.yaml --datasource config=stdin:///config.yaml

Another approach could be to allow setting/overriding the MIME type directly as a URL query parameter, like this:

generates_some_yaml | gomplate --file template.yaml --datasource config=stdin://?type=application/yaml

Obviously more verbose, though the same approach could be applied generally to other datasource types to allow overriding the MIME type... 🤔

I think there's still value in allowing -, if you're just going to include the data and don't need it to be parsed, but otherwise a type will be necessary for parsing.

[ghost]

Thanks for the feedback!

Any method would be fine with me. I actually ran into the mime issue with a something.yaml.tmp that I rendered as a workaround. I think the first example is my favorite of the two.

[hairyhenderson]

Ok! I like both approaches, and I may add the second as a more general flexibility thing... But for now I'll implement the first 😉