The power of command line tools

Topics

1. modern fast replacements for established use cases
2. new more powerful tools
3. interactive command line tools aka text UI or TUI

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Modern fast replacements for established use cases

Out with the old in with the new

These are faster better stronger replacements for established use cases.

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grep ripgrep (rg)

mortgage-engine$ time grep user # does not finish
# does not finish

mortgage-engine$ time rg user # skipps anything in git ignore by default
# rg user  0.08s user 0.30s system 211% cpu 0.179 total

mortgage-engine$ time rg -vvv user # search it all!
# rg -vvv user  0.27s user 0.51s system 37% cpu 2.072 total

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find fd

mortgage-engine$ time find . -name user.rb
# ./app/models/brokers/user.rb
# ./app/models/user.rb
# find . -name user.rb  0.19s user 2.73s system 99% cpu 2.932 total

mortgage-engine$ time fd user.rb
# app/models/admin_user.rb
# app/models/brokers/application_user.rb
# app/models/brokers/user.rb
# app/models/user.rb
# db/migrate/20201022095750_remove_provider_from_user.rb
# db/migrate/20210111150109_add_role_to_admin_user.rb
# db/migrate/20210203090756_add_intercom_id_to_user.rb
# db/migrate/20210617153246_add_names_to_admin_user.rb
# db/migrate/20210622124717_add_oauth_fields_to_admin_user.rb
# db/migrate/20210728081905_add_phone_number_to_broker_user.rb
# fd user.rb  0.04s user 0.06s system 426% cpu 0.023 total

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ls exa

cat bat

Demo in shell.

Remember to

unalias ls
unalias cat

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New more powerful tools

Do more on the command line

These are tools that allow easier scripting and new workflows without leaving the terminal.

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fzf

fzf is a general-purpose command-line fuzzy finder.

gh pr view --web $(gh pr list | fzf | cut -f 1)

# gh is githubs cli
# cut allows to cut a string into parts (split)
# and only take certain fields (here the first split by <space>)

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sttr (newly discovered)

# With input prompt
sttr

# Direct input
sttr md5 "Hello World"

# File input
sttr md5 file.text
sttr base64-encode image.jpg

# Reading from different processor like cat, curl, printf etc..
echo "Hello World" | sttr md5
cat file.txt | sttr md5

# Writing output to a file
sttr yaml-json file.yaml > file-output.json

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Interactive command line tools aka text UI or TUI

Now you are living in the terminal

It's nice why would you ever lave to use a mouse :D.

There are interactive tools, that often replace GUI functions. But unlike GUI apps, they are designed to be used keyboard first.

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Demo time

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slides

Write slides in markdown. You have been seeing this in action for a while now.

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LazyGit

mortgage-engine$ lazygit

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VisiData

Downloads$ vd entries.csv

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Vim (NeoVim)

One of the oldest TUI available :D. But it plays really nice with all its new friends. Specially NeoVim with terminal and floating window support.

mortgage-engine$ vim

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But wait there is more ...

• glow will render markdown on the command line for you.
• termdbms seams to be a SQL client TUI
• Kubelive kubernetes cluster management
• share-cli quick temporary file sharing
• emma-cli node package browser

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Questions / Comments ?

I love this stuff, talk to me anytime ;) .

slides