CODEWITHSUNDEEP
jqfzf
Hatshepsut
Hatshepsut

Reputation: 6662

Run jq in fzf preview with arguments

I have some json data and I want to interactively query it with fzf and jq, by sending the data through stdin and typing the jq query into the fzf query box.

My attempt so far is showing one result in the box, but editing the contents of the query box turns the results blank instead.

fzf-tmux --preview 'jq "$@"  <<< {}'    <<<'[{"x": 1}, {"y": 2}]'

Upvotes: 1

Views: 2381

Answers (2)

NotTheDr01ds
NotTheDr01ds

Reputation: 20822

A recent Hacker News post about using fzf as a REPL had me thinking it would be interesting to live-edit jq filters as well. Using the base implementation from that article, I ended up with:

echo '' | fzf --print-query --preview='jq {q} <(echo "[{\"x\": 1}, {\"y\": 2}]")'

You can clean up the quoting a bit, at the expense of some verbosity, by changing it to:

(export json='[{"x": 1}, {"y": 2}]'; echo '' | fzf --print-query --preview='jq {q} <(echo $json)')

or (somewhat safer for unvalidated input):

(export json='[{"x": 1}, {"y": 2}]'; echo '' | fzf --print-query --preview='jq {q} <(printf "%s" "$json")')

Final example, using the StackExchange API to retrieve this post:

(export json=$(curl -s --compressed -H "Accept-Encoding: GZIP" "https://api.stackexchange.com/2.2/posts/56744579?site=stackoverflow&filter=withbody"); echo '' | fzf --print-query --preview-window=wrap --preview='filter={q}; jq -M -r "${filter}" <(printf  "%s" "$json")')</code>

One more example, added around 18 months later. This is the same as the previous example, but for the Fish shell. It also uses httpie to clean things up as well, since httpie automatically handles things like the encoding/compression. I also left in the color output on this one:

begin
    set -lx jq_url 'https://api.stackexchange.com/2.2/posts/56744579?site=stackoverflow&filter=withbody'
    echo '' | fzf --print-query --preview='set -x q {q}; jq -C {q} (http -b GET "$jq_url" | psub)'
end

Note: The begin/end block is only there to keep variables in a local scope. They really aren't required for the example to work, just to keep from polluting the namespace.

Upvotes: 5

peak
peak

Reputation: 116957

If you're expecting $@ to be expanded by the shell, then the simple fix is to modify the quoting:

fzf-tmux --preview 'jq '"$@"' <<< {}'

If on the other hand, you want to use the {q} feature of fzf, which seems to be the case, then you may be out of luck, though whether that's because of a bug in fzf, or some incompatibility between jq and fzf, I cannot tell.

Navigating by paths

Let's suppose $JSON is a file containing a single JSON array or object. Then when running the following, you'll see the paths on the LHS, and the value at the selected path on the RHS:

jq -rc paths "$JSON" |
  fzf-tmux --preview 'x={}; jq "getpath($x)" '"$JSON"

Upvotes: 2

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