I like nushell because it works the same on all the operative systems. Something kind of obvious in the present date, but still unaddressed in some circumstances.

You want to extract a piece of info from a json file

Get all the scripts from the package.json

open package.json | get scripts

List all the apps from the file scoop-list.json and get the key apps

open scoop-list.json | get 'apps'

source: documentation

get a fancy history commands menu with fzf

run:

commandline (history | each { |it| $it.command } | uniq | reverse | str join  (char nl) | fzf --tiebreak=chunk --layout=reverse  --multi --preview='echo {..}' --preview-window='bottom:3:wrap' --height=70% -q (commandline) | decode utf-8 | str trim)

source: nushell discord

if you have a json output

try to pipe it with | from json

scoop export | from json

use help to help you

The command help of nushell have syntax coloring and a few goodies, but you should generate first the options, types and descriptions. (Checkout the nushell community, there are high chances that they have done it already!)

help git push outputs

Check out git branches and files


Usage:
  > git checkout {flags} ...(targets)

Flags:
  --conflict <String> - conflict style (merge or diff3)
  -d, --detach - detach HEAD at named commit
  -f, --force - force checkout (throw away local modifications)
  --guess - second guess 'git checkout <no-such-branch>' (default)
  --ignore-other-worktrees - do not check if another worktree is holding the given ref
  --ignore-skip-worktree-bits - do not limit pathspecs to sparse entries only
  -m, --merge - perform a 3-way merge with the new branch
  --orphan <String> - new unparented branch
  -2, --ours - checkout our version for unmerged files
  --overlay - use overlay mode (default)
  --overwrite-ignore - update ignored files (default)
  -p, --patch - select hunks interactively
  --pathspec-from-file <String> - read pathspec from file
  --progress - force progress reporting
  -q, --quiet - suppress progress reporting
  --recurse-submodules <String> - control recursive updating of submodules
  -3, --theirs - checkout their version for unmerged files
  -t, --track - set upstream info for new branch
  -b <String> - create and checkout a new branch
  -B <String> - create/reset and checkout a branch
  -l - create reflog for new branch
  --help - Display the help message for this command

Parameters:
  ...targets <string>: name of the branch or files to checkout

which comes from the code:

export extern "git checkout" [

    --conflict: string                              # conflict style (merge or diff3)
    --detach(-d)                                    # detach HEAD at named commit
    --force(-f)                                     # force checkout (throw away local modifications)

This lists the descriptions for options, and the types (<String> for --conflict and so on)

export extern "git checkout" [
    ...targets: string@"nu-complete git branches"   # name of the branch or files to checkout
etc

and after the @ runs the function nu-complete git branches after you press TAB in the place you get targets