Using Kitty hints to parse maven output

Kitty is a very fast and feature rich terminal which has soon become my favourite.

One of the powerful features of Kitty is its customizability.

One such feature is Kitty hints

Kitty hints allows you to select text on terminal and perform an action through a shortcut key. It is completely customizeable.

Common kitty hints action include opening files, folders and opening web urls outputted in terminal.

One example where, I was able to customize it was to parse maven output and makes the file links clickable to land directly on the line numbers.

For example, consider this build output:

[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.618 s
[INFO] Finished at: 2023-12-28T10:08:38+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile (default-compile) on project reactive-programming: Compilation failure: Compilation failure: 
[ERROR] /run/media/madhur/centos/home/madhur/github/personal/reactive-programming/src/main/java/in/co/madhur/mono/FileService.java:[17,9] invalid method declaration; return type required
[ERROR] /run/media/madhur/centos/home/madhur/github/personal/reactive-programming/src/main/java/in/co/madhur/mono/FileService.java:[17,20] illegal start of type
[ERROR] /run/media/madhur/centos/home/madhur/github/personal/reactive-programming/src/main/java/in/co/madhur/mono/Lec08MonoRunnable.java:[15,54] ';' expected
[ERROR] /run/media/madhur/centos/home/madhur/github/personal/reactive-programming/src/main/java/in/co/madhur/mono/Lec06SupplierRefactoring.java:[25,37] ';' expected
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

Using kitty hints, we can make the file paths to FileService.java , Lec08MonoRunnable.java and Lec06SupplierRefactoring.java clickable and land it directly on appropriate line numbers.

This required writing custom regex to parse this line and emitting two named capturing groups path and line.

This can be done in kitty.conf as :

map kitty_mod+p kitten hints --type=regex --regex="(?<path>(?:\/[\w-_^ ]+)+\/?(?:[\w.])+[^.]):\[(?<line>\d+),\d+\].?" --program "launch /home/madhur/scripts/editor.py"

The editor.py is a simple program which is invoked with parameters path=...../FileService.java and line=17

In my case, I launch Neovim or IntelliJ depending upon if Intellij is previously running.

This can be simply done through following snippet:

#!/usr/bin/env python3

import sys
import os
import subprocess

myObject = {}
for line in sys.argv:
    if '=' not in line:
        continue
    print(line)
    key, value = line.rstrip("\n").split("=")
    myObject[key] = value

print(myObject)

idea_running = False
pl = subprocess.Popen(['ps', 'aux'], stdout=subprocess.PIPE).communicate()[0]
list_ps = pl.decode('utf-8')

if 'intellij' in list_ps:
    idea_running = True

if idea_running is True and 'java' in myObject['path']:
    print("Intellij found")
    os.system("flatpak run com.jetbrains.IntelliJ-IDEA-Community " + myObject['path'])
else:
    print("Intellij not found")
    os.system("nvim " + " +"+myObject['line'] + " " + myObject['path'])