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bash prompt memo

Category:Tech BlogTags:
#shellscript#bash
Published: 2019 - 4 - 29

Because I wanted to display the Git branch in the prompt, I changed PS1 (The primary prompt string) in ~/.bashrc based on Customize the prompt to display the git branch, so this is a memorandum.

After setting the above,

my prompt

It became like this.

According to 2.5. Bash Prompt Escape Sequences, it is as follows.

  • \h => Hostname
  • \u => Username
  • \w => Directory (full path)
  • \W => Directory
  • \t => Time (24-hour format)
  • \T => Time (12-hour format)
  • \@ => AM / PM
  • \d => Date
  • \D => Date and time
  • \# => Command number
  • \! => History number
  • \n => Newline

As for the display,

[<Command number>(<History number>)] <Time HH:MM:SS> <user> at <directory> [<branch>]

It becomes like this.

In the <branch> part, parse_git_branch is called, and inside it, the result of git branch --no-color is replaced with sed, and errors (2) are discarded to /dev/null.

Also, as mentioned in the article above, the following variables can be used for color settings:

local  BLUE="\[\e[1;34m\]"
local  RED="\[\e[1;31m\]"
local  GREEN="\[\e[1;32m\]"
local  WHITE="\[\e[00m\]"
local  GRAY="\[\e[1;37m\]"

By
the
way

It seems that PS2 (The secondary prompt string) can also be set, but it's troublesome so I'll leave it alone.

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