fernando/dotfiles
1
0
Fork 0
Code Issues 4 Pull requests Projects Releases Packages Wiki Activity

Improve bash prompt speed

Browse source 
Avoiding starting many processes during creation of the PS1 string makes
the shell much more responsive, especially under Cygwin, which has
problems with fork().
This commit is contained in:
Fernando Schauenburg 2019-11-05 20:25:08 +01:00 • committed by U-BOURNS\fernandos
parent c5baba5f5f
commit 907eb892de
1 changed files with 22 additions and 44 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

66
dotfiles/.config/bash/profile
View file

@ -114,6 +114,8 @@ HISTFILE="$XDG_CACHE_HOME/bash/history"
PS1_GIT=$(tput setaf $Green) # color for git branch
PS1_VENV=$(tput setaf $Violet) # color for python virtual env
PS1_JOBS=$(tput setaf $Magenta) # color for background jobs
PS1_SEP=" > " # separator between prompt parts
PS1_SEP_COLOR="" # is set in __update_colors
PS1_RST=$(tput sgr0)
GIT_PS1_SHOWDIRTYSTATE=1
@ -122,56 +124,26 @@ HISTFILE="$XDG_CACHE_HOME/bash/history"
GIT_PS1_SHOWUPSTREAM=verbose
}
PROMPT_COMMAND=__ps1_set
PS2="... "
PROMPT_COMMAND=__ps1_set
__ps1_set() {
local last_status=$?
local prompt color sep_color sep
local last_status=$? prompt_char prompt host_color sep
if [ $EUID -eq 0 ]; then
prompt=$(printf '#%.0s' $(seq 1 $SHLVL))
color=$PS1_ROOT
else
prompt=$(printf '\$%.0s' $(seq 1 $SHLVL))
if [ -n "$SSH_CLIENT" ]; then
color=$PS1_SSH
else
color=$PS1_DEFAULT
fi
fi
if [ "$BACKGROUND" = "light" ]; then
sep_color=$(tput setaf $Base1)
else
sep_color=$(tput setaf $Base01)
fi
sep="$sep_color > $PS1_RST"
prompt_char=">>>>>>>>>>"
host_color=$PS1_DEFAULT
[ -n "$SSH_CLIENT" ] && host_color=$PS1_SSH
[ $EUID -eq 0 ] && { host_color=$PS1_ROOT; prompt_char="!!!!!!!!!!"; }
prompt="${prompt_char:0:$SHLVL}"
sep="$PS1_SEP_COLOR$PS1_SEP$PS1_RST"
PS1="\n"
if [ $last_status -ne 0 ]; then
PS1+="$PS1_ERR$last_status$PS1_RST$sep" # last exit code (in non-zero)
fi
PS1+="$color\h$PS1_RST$sep$PS1_PWD\w$PS1_RST" # user@host pwd
PS1+=$(__git_ps1 "$sep$PS1_GIT%s$PS1_RST") # git status (if in repo)
PS1+=$(__ps1_venv "$sep$PS1_VENV(%s)$PS1_RST") # python virtual env (if active)
PS1+=$(__ps1_jobs "$sep$PS1_JOBS%s$PS1_RST") # background jobs (if any)
PS1+="\n$prompt " # ] $
}
__ps1_venv() {
local venv
venv="$(basename "$VIRTUAL_ENV" 2>/dev/null)"
# shellcheck disable=SC2059 # variable format string is really needed here
[ -n "$venv" ] && printf "${1:-%s}" "$venv"
}
__ps1_jobs() {
local n
n=$(jobs | wc -l)
# shellcheck disable=SC2059 # variable format string is really needed here
[ "$n" -gt 0 ] && printf "${1:-%s}" "$n job$([ "$n" -gt 1 ] && echo -n s)"
[ $last_status -ne 0 ] && PS1+="$PS1_ERR$last_status$PS1_RST$sep"
PS1+="$host_color\h$PS1_RST$sep$PS1_PWD\w$PS1_RST"
PS1+=$(__git_ps1 "$sep$PS1_GIT%s$PS1_RST")
[ -n "$VIRTUAL_ENV" ] && PS1+="$sep$PS1_VENV${VIRTUAL_ENV##*/}$PS1_RST"
[ "$(jobs | wc -l)" -gt 0 ] && PS1+="$sep${PS1_JOBS}bg: \j$PS1_RST"
PS1+="\n$prompt "
}
##############################################################################
@ -240,6 +212,12 @@ _update_colors() {
export BACKGROUND="$1"
if [ "$BACKGROUND" = "light" ]; then
PS1_SEP_COLOR=$(tput setaf $Base1)
else
PS1_SEP_COLOR=$(tput setaf $Base01)
fi
cursor=$Red_RGB
if [ "$BACKGROUND" = "light" ]; then
fg=$Base01_RGB