Make the prompt great again
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This document introduces GBT (Go Bullet Train), a highly configurable prompt builder for Bash and ZSH shells written in Go. GBT aims to provide a fast and customizable prompt while overcoming the slowness of shell-based prompt frameworks. It includes 10 customizable "cars" for displaying information like the current directory, Git status, and system information. Benchmarks show GBT has faster performance than traditional shell prompts. The document also discusses GBT's features like integration with SSH and limitations around only working with Bash. It encourages contributions to the open source project.
![Benchmark
cat /tmp/test.sh
BRANCH="$(git symbolic-ref HEAD)"
[ -z "$(git status --porcelain)" ] && DIRTY_ICON='%{e[38;5;2m%}✔' ||
DIRTY_ICON='%{e[38;5;1m%}✘'
[[ "$(git rev-list --count HEAD..@{upstream})" == '0' ]] && AHEAD_ICON='' || AHEAD_ICON=' ⬆'
[[ "$(git rev-list --count @{upstream}..HEAD)" == '0' ]] && BEHIND_ICON='' || BEHIND_ICON=' ⬇'
echo -en "%{e[0m%}%{e[48;5;7m%}%{e[38;5;0m%}
%{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m%}%{e[38;5;0m%}
%{e[48;5;7m%}%{e[38;5;0m%}${BRANCH##*/}%{e[48;5;7m%}%{e[38;5;0m%}
%{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m%}$DIRTY_ICON%{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m%
}%{e[38;5;0m%}%{e[48;5;7m%}%{e[38;5;0m%}$AHEAD_ICON%{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m
%}%{e[38;5;0m%}$BEHIND_ICON%{e[48;5;7m%}%{e[38;5;0m%} %{e[0m%}"](https://image.slidesharecdn.com/makethepromptgreatagain-180126092409/85/Make-the-prompt-great-again-16-320.jpg)
Make the prompt great again
- 1. Make the prompt great again Jiri Tyr & Vladimir Babichev
- 2. What makes the command prompt great? ● It provides useful information ● It looks nice ● It's fast
- 3. Shell frameworks ● Bash ○ Bash Infinity ○ Bash-it ○ ... ● ZSH ○ Oh My ZSH ○ Prezto ○ ... All written in shell = slow!
- 4. How to make it run faster?
- 5. Write it in Go!
- 6. We would like to introduce you... GBTGBT
- 8. GBT = Go Bullet Train Highly configurable prompt builder for Bash and ZSH written in Go. It's inspired by the Bullet Train theme for Oh My ZSH framework.
- 9. GBT
- 10. GBT anatomy
- 11. GBT anatomy
- 12. GBT anatomy
- 13. GBT ● 10 cars ○ Custom, Dir, ExecTime, Git, Hostname, Os, PyVirtEnv, Sign, Status, Time ● Over 200 environment variables ● Nerd fonts ● Packages for multiple platforms ○ Linux ■ RPM repo ... yum install gbt ■ DEB repo ... apt-get install gbt ■ AUR ... yaourt -S gbt ○ Mac ■ Brew ... brew install gbt ○ Android ■ Termux ... apt install gbt
- 14. GBT on Android ● Install Termux and Termux:Styling ● Select font ● Install and setup GBT apt update apt install gbt PS1='$(gbt $?)'
- 15. Demo
- 16. Benchmark cat /tmp/test.sh BRANCH="$(git symbolic-ref HEAD)" [ -z "$(git status --porcelain)" ] && DIRTY_ICON='%{e[38;5;2m%}✔' || DIRTY_ICON='%{e[38;5;1m%}✘' [[ "$(git rev-list --count HEAD..@{upstream})" == '0' ]] && AHEAD_ICON='' || AHEAD_ICON=' ⬆' [[ "$(git rev-list --count @{upstream}..HEAD)" == '0' ]] && BEHIND_ICON='' || BEHIND_ICON=' ⬇' echo -en "%{e[0m%}%{e[48;5;7m%}%{e[38;5;0m%} %{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m%}%{e[38;5;0m%} %{e[48;5;7m%}%{e[38;5;0m%}${BRANCH##*/}%{e[48;5;7m%}%{e[38;5;0m%} %{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m%}$DIRTY_ICON%{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m% }%{e[38;5;0m%}%{e[48;5;7m%}%{e[38;5;0m%}$AHEAD_ICON%{e[48;5;7m%}%{e[38;5;0m%}%{e[48;5;7m %}%{e[38;5;0m%}$BEHIND_ICON%{e[48;5;7m%}%{e[38;5;0m%} %{e[0m%}"
- 17. Benchmark # Execution of the testing script by Bash for N in $(seq 10); do time (for M in $(seq 100); do bash /tmp/test.sh 1>/dev/null 2>&1; done) done 2>&1 | awk '{ total_cpu += $19; total_time += $21 } END { print "Avg CPU: "total_cpu/NR"%; Avg time: "total_time/NR"s" }' Avg CPU: 102%; Avg time: 1.9407s # Execution of the testing script by ZSH for N in $(seq 10); do time (for M in $(seq 100); do zsh /tmp/test.sh 1>/dev/null 2>&1; done) done 2>&1 | awk '{ total_cpu += $19; total_time += $21 } END { print "Avg CPU: "total_cpu/NR"%; Avg time: "total_time/NR"s" }' Avg CPU: 103%; Avg time: 1.9079s # Execution of GBT for N in $(seq 10); do time (for M in $(seq 100); do GBT_SHELL='zsh' GBT_CARS='Git' gbt 1>/dev/null 2>&1; done) done 2>&1 | awk '{ total_cpu += $18; total_time += $20 } END { print "Avg CPU: "total_cpu/NR"%; Avg time: "total_time/NR"s" }' Avg CPU: 115%; Avg time: 1.8817s
- 18. OS Icons
- 20. Demo
- 21. How does it work? ssh myserver -t " echo "PS1='$(gbt)'" > /tmp/.gbt; bash --rcfile /tmp/.gbt; rm -f /tmp/.gbt"
- 22. Features ● GBT executes only locally ● GBT generates a string which is then forwarded to a remote machine ● Supports forwarding of local aliases ● Integrates with SSH, Docker, Vagrant, MySQL ● Supports su and sudo
- 23. Limitations ● Works only with Bash ● Doesn’t support ExecTime, Git, PyVirtEnv cars
- 25. Contribution and support ● Contribute ○ Create new themes (e.g. solarized) ○ Create new cars ■ SCM (e.g. Mercurial) ■ CPU load ■ ... ○ Optimize sequence string produced by GBT ○ Make tests running in parallel ● Spread the word ○ Thanks Gareth Rushgrove for advertising it in the next DevOps Weekly ;o) ● Star the project on Github https://github.com/jtyr/gbt
- 26. Thank you for your attention! Questions?