How to interactively filter a stream of logs using fzf and ripgrep.

[brpaz]

Hello.

I am trying to make a function that will stream the contents of a log (Ex: docker or journal) , and be able to filter the stream using ripgrep.

Is there any example or someone can give me some guidelines how can I do this?

With some help from ChatGPT I got this, but I have no idea what I am doing.

It can display and filter logs, but it´s not refreshing as new logs appear and the back and forth in the search is also not working 100%.

docker logs --follow "$container" 2>&1 |
      fzf --ansi \
         --reverse \
         --header="Streaming logs for container $container | Type to filter | Ctrl-C to exit" \
         --preview 'echo {} | rg --color always --passthru ""' \
         --preview-window=down:50%:follow \
         --bind 'change:reload:echo {} | rg --color always --passthru ""' \
         --no-clear

Thank you.

[LangLangBart]

I am trying to make a function that will stream the contents of a log

fzf is already an interactive grep filter. Simply use docker logs --follow "$container" | fzf --exact and start typing the keyword you're looking for. No need to use ripgrep.

Is there any example or someone can give me some guidelines how can I do this?

There are some examples in the ADVANCED.md¹² or on the maintainer's website³.

In a recent PR (#4079), a user demonstrated how to search for a keyword while displaying the line within the stream and its surrounding lines in the preview.

Footnotes

1. fzf/ADVANCED.md - Log tailing ↩

2. fzf/ADVANCED.md - Ripgrep integration ↩

3. junegunn.github.io: Browsing log streams | junegunn.choi. ↩