--sixel to display values that are images in terminal using sixel protocol

[gwpl]

Sixel allows to display images in terminals ( e.g. https://github.com/saitoha/libsixel ; https://en.wikipedia.org/wiki/Sixel ; https://github.com/atanunq/viu ),
let's make --sixel flag that will :

• under each value (in pretty print mode) that contains image (e.g. base64 encoded) to display "key-name:" and after that display image using sixel
• that would require detecting if given value is base64 and later if is some supported image file (e.g. png, jpg, webp, etc) (e.g. --img auto flag)
• alternatively pointing manually at keys to try to decode as image ( --img .data.key.img )

Rationale:

• more and more APIs return image encoded as value, or AI/ML datasets, contain images in json files as values.

[gwpl]

Example JSON with PNG base64 value.
https://gist.github.com/gwpl/f770639a0a21025ec5c1c775a200ddc8

[itchyny]

Currently, jq supports only UTF8 strings, so it replaces badly encoded bytes to \uFFFD right after @base64d. See #1931.

[gwpl]

Is something badly encoded in example input I prepared: https://gist.github.com/gwpl/f770639a0a21025ec5c1c775a200ddc8 ?

[wader]

Maybe this could be a separate tool? ex: jq ... | fancy-json?

[gwpl]

Yeah, adding separate tool sounds like interesting idea 🤔 , I thought that we couldmake jless or jaq to be such tool, but I encountered sixel image positioning problems, otherwise prototype seems to work: 01mf02/jaq#267

[gwpl]

Patch on jaq Works ! You can use

01mf02/jaq#269 (hopefully soon merged)

to have it working like:

01mf02/jaq#267 (comment)

so you can pipe e.g. jq ... | jaq --img auto to have images displayed in terminal via Sixel magic (using viuer crate)