jj jj jj jj jj - CaiusTheory For more information, try '--help'. How annoying. Now we could solve this with a shell alias, but jj also allows us to define alias&rsquo; in the configuration (much like git!"> For more information, try '--help'. How annoying. Now we could solve this with a shell alias, but jj also allows us to define alias&rsquo; in the configuration (much like git!">In a similar vein to git git git git git, if you&rsquo;re using jj and find you&rsquo;ve accidentally typed one jj too many in the command line, it errors at you. In this case we&rsquo;re trying to pull the id of the current changeset we&rsquo;re editing:<br>$ jj jj show -T 'change_id.short()'<br>error: unrecognized subcommand 'jj'

Usage: jj [OPTIONS]

For more information, try '--help'.

How annoying. Now we could solve this with a shell alias, but jj also allows us to define alias&rsquo; in the configuration (much like git!), and combined with jj util exec we should be able to have it run the rest of the line nay bother.<br>Thinking it through, the initial jj will be exec&rsquo;d by the shell, so that&rsquo;s gone already. The second jj is then evaluated as the alias, so that&rsquo;s gone too. The remaining arguments passed to the alias are ["show", "-T", "change_id.short()"] so if we just exec those it&rsquo;ll error trying to run show as a binary. We can avoid that by having it exec jj then the arguments from the alias.<br>Drop the alias in a jj config file (jj config edit is super useful for editing these, or there&rsquo;s jj config set to update it from the shell) and then we can test it works.<br>[aliases]<br># jj all the way down<br>jj = ["util", "exec", "jj"]

Lets try our original nested command again and see if we get to see our sweet sweet change id:<br>$ jj jj show -T 'change_id.short()'<br>error: unexpected argument '-T' found

tip: to pass '-T' as a value, use '-- -T'

Usage: jj util exec [OPTIONS] [ARGS]...

For more information, try '--help'.

Oh. Our -T argument is being interpreted by jj util exec, not by the jj command we&rsquo;re running. Classic nested argument parsing when you&rsquo;re trying to invoke another command. Luckily shell/exec has a solution to this, passing -- as an argument stops parsing all remaining arguments so they are passed along verbatim.<br>With that in mind we can amend our alias to run jj util exec and then stop interpreting any further arguments.<br>[aliases]<br># jj all the way down<br>jj = ["util", "exec", "--", "jj"]

Now we should be able to see our change id without any issues, no matter how many nested jjs there are in the command!<br>$ jj show -T 'change_id.short()'<br>upvqxuzzvxtx

$ jj jj show -T 'change_id.short()'<br>upvqxuzzvxtx

$ jj jj jj jj jj show -T 'change_id.short()'<br>upvqxuzzvxtx

$ jj jj jj jj jj jj jj jj jj jj jj jj jj jj jj jj jj show -T 'change_id.short()'<br>upvqxuzzvxtx

Happy committing.