dotfiles/includes/bash_prompt.bash

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#
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# Clean and minimalistic Bash prompt
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# Author: Artem Sapegin, sapegin.me
#
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# Inspired by: https://github.com/sindresorhus/pure & https://github.com/dreadatour/dotfiles/blob/master/.bash_profile
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#
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# Notes:
# - $local_username - username you dont want to see in the prompt - can be defined in ~/.bashlocal : `local_username="admin"`
# - Colors ($RED, $GREEN) - defined in ../tilde/bash_profile.bash
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#
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# User color
case $(id -u) in
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0) user_color="$RED" ;; # root
*) user_color="$GREEN" ;;
esac
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# Symbols
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prompt_symbol=""
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prompt_clean_symbol="☀ "
prompt_dirty_symbol="☂ "
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function prompt_command() {
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# Local or SSH session?
local remote=
[ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ] && remote=1
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# Git branch name and work tree status (only when we are inside Git working tree)
local git_prompt=
if [[ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ]]; then
# Branch name
local branch="$(git symbolic-ref HEAD 2>/dev/null)"
branch="${branch##refs/heads/}"
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# Working tree status (red when dirty)
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local dirty=
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# Modified files
git diff --no-ext-diff --quiet --exit-code --ignore-submodules 2>/dev/null || dirty=1
# Untracked files
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[ -z "$dirty" ] && test -n "$(git status --porcelain)" && dirty=1
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# Format Git info
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if [ -n "$dirty" ]; then
git_prompt=" $RED$prompt_dirty_symbol$branch$NOCOLOR"
else
git_prompt=" $GREEN$prompt_clean_symbol$branch$NOCOLOR"
fi
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fi
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# Only show username if not default
local user_prompt=
[ "$USER" != "$local_username" ] && user_prompt="$user_color$USER$NOCOLOR"
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# Show hostname inside SSH session
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local host_prompt=
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[ -n "$remote" ] && host_prompt="@$YELLOW$HOSTNAME$NOCOLOR"
# Show delimiter if user or host visible
local login_delimiter=
[ -n "$user_prompt" ] || [ -n "$host_prompt" ] && login_delimiter=":"
# Format prompt
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first_line="$user_prompt$host_prompt$login_delimiter$WHITE\w$NOCOLOR$git_prompt"
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# Text (commands) inside \[...\] does not impact line length calculation which fixes stange bug when looking through the history
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# $? is a status of last command, should be processed every time prompt prints
second_line="\`if [ \$? = 0 ]; then echo \[\$CYAN\]; else echo \[\$RED\]; fi\`\$prompt_symbol\[\$NOCOLOR\] "
PS1="\n$first_line\n$second_line"
# Multiline command
PS2="\[$CYAN\]$prompt_symbol\[$NOCOLOR\] "
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# Terminal title
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local title="$(basename $PWD)"
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[ -n "$remote" ] && title="$title \xE2\x80\x94 $HOSTNAME"
echo -ne "\033]0;$title"; echo -ne "\007"
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}
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# Show awesome prompt only if Git is istalled
command -v git >/dev/null 2>&1 && PROMPT_COMMAND=prompt_command