Add -0 command-line option

[nicowilliams]

It'd be nice to be able to use ASCII NUL instead of LF for non-raw-output mode for use with xargs -0 and such. In raw output mode, of course, one can use -j and output "\u0000" as necessary.

As a workaround until this is done, use raw-output mode and output raw values, but pipe all strings to tojson first: jq -rj '... | if type=="string" then tojson else . end'.

[bsolomon1124]

Related to/dupe of #1658.

[itchyny]

The --nul-output is already implemented by #1990 (which closed #1271). jq --nul-output '.. | tojson' does the trick.

[bsolomon1124]

Thanks @itchyny, though it looks like that option does not exist on jq-master-v20200428-28-g864c859e9d, which is the version available on Alpine 3.12.0.

I also don't see it for jq-1.5-1-a5b5cbe on Ubuntu eoan 19.10.

[bsolomon1124]

Indeed, the last release of jq was in 2018, long before this option was added. Are the releases no longer being updated and should we just build from source instead?

[asottile]

I just built this from source, it looks like -0 is ignored (and also not part of the help text) -- --nul-output seems to work though 👍

[wader]

@itchyny anything left to do for this issue?

[itchyny]

This option has been fully implemented, so closing the issue.