Re: PS1 multiline with colors
On Fri, Jul 05, 2013 at 12:50:53AM +0800, Chris Down wrote: > > PS1='\h Hello everybody\n\e[1;35m\]Hi\e[0m\]>' > You need to properly indicate that the control codes are zero-width > (by using \[ and \]). Without them, this is expected behaviour. > > Better, don't hardcode the escape codes for colours -- it is a naive > assumption to believe that all terminals will do what you expect. Use > `tput' instead. There are two ways of doing this (nobody can agree which way is better). The first way is to put each tput result in a variable, and use the variables inside PS1 so that they are expanded when PS1 is evaluated: red=$(tput setaf 1) normal=$(tput sgr0) PS1='\h Hello everybody\n\[$red\]Hi\[$normal\]> ' export red normal PS1 The second way is to expand the variables at the time PS1 is created: red=$(tput setaf 1) normal=$(tput sgr0) PS1='\h Hello everybody\n\['"$red"'\]Hi\['"$normal"'\]> ' export PS1 I prefer the first one myself, but there is no consensus. I find the first one more readable, both in the code where you define the prompt, and in the result of echo "$PS1" should you ever want to SEE the prompt and understand what it is doing. Others prefer the second because they don't want to lug around all the $red $normal $green $blue etc. variables. See also http://mywiki.wooledge.org/BashFAQ/053
Re: PS1 multiline with colors
On Fri, Jul 05, 2013 at 12:21:13PM +, BASTIDON, Stéphane wrote: > Now my case is a little more complex: > I want my prompt changes colors according to $PWD Then I write something like > that: This is the kind of thing where I suggest using PROMPT_COMMAND. normal=$(tput sgr0) red=$(tput setaf 1) green=$(tput setaf 2) ... PROMPT_COMMAND=' case $PWD in /usr/local/*) color=$red ;; /var/*) color=$green ;; ... esac ' PS1='\u@\h:\[$color\]\w\[$normal\]\$ ' export normal red green ... PROMPT_COMMAND PS1 The PROMPT_COMMAND will be evaluated before PS1. You can use it to set variables that PS1 will use, all without the horrible speed penalty of a fork/exec.
Re: PS1 multiline with colors
This function (colorSet) takes one or more associative array names and can populate it with a few predefined color palates. Written for Bash/ksh93/zsh. http://wiki.bash-hackers.org/snipplets/add_color_to_your_scripts -- Dan Douglas
RE: PS1 multiline with colors
I'll try that asap ... Thanks -Message d'origine- De : Greg Wooledge [mailto:wool...@eeg.ccf.org] Envoyé : vendredi 5 juillet 2013 14:31 À : BASTIDON, Stéphane Cc : bug-bash@gnu.org Objet : Re: PS1 multiline with colors On Fri, Jul 05, 2013 at 12:21:13PM +, BASTIDON, Stéphane wrote: > Now my case is a little more complex: > I want my prompt changes colors according to $PWD Then I write something like > that: This is the kind of thing where I suggest using PROMPT_COMMAND. normal=$(tput sgr0) red=$(tput setaf 1) green=$(tput setaf 2) ... PROMPT_COMMAND=' case $PWD in /usr/local/*) color=$red ;; /var/*) color=$green ;; ... esac ' PS1='\u@\h:\[$color\]\w\[$normal\]\$ ' export normal red green ... PROMPT_COMMAND PS1 The PROMPT_COMMAND will be evaluated before PS1. You can use it to set variables that PS1 will use, all without the horrible speed penalty of a fork/exec.
