-# $Id$
-# VERSION 1.2 (2001-10-31)
+#!bash Coloured prompts.
+# To use, add a call to __ps1 in your .bash_profile file.
#
-# coloured prompts for bash
+# The prompt comprises multiple parts, some of which may be hidden by unsetting
+# shell variables or using the ``prompt'' function.
#
-# prompt is user@host:/dir$ where host is highlighted in green if the last
-# command exited 0 or in red (followed by the error code) otherwise
+# The first part of the prompt is user@host where host is highlighted in
+# green if the last command exited 0 or in red otherwise.
+# This part will be shown only if __ps1_user is 1. By default it is 1.
+# The success and failure colours can be changed by modifying
+# $PROMPT_OK_COLOUR and $PROMPT_FAILURE_COLOUR respectively.
#
-# to use, add a call to __ps1 in your .bash_profile
+# The second part of the prompt is taken from git-completion.bashrc.
+# It is shown only if __ps1_git is 1. By default it is 0.
+#
+# The third part of the prompt is taken from p4-completion.bashrc.
+# It is shown only if __ps1_p4 is 1. By default it is 0.
+#
+# The fourth part of the prompt is taken from svn-completion.bashrc.
+# It is shown only if __ps1_svn is 1. By default it is 0.
+#
+# The fifth part of the prompt is the exit status of the last command.
+# This part will be shown only if __ps1_user is set and the exit status is
+# non-zero.
+#
+# The final part of the prompt is the (full) working directory and $ string.
+#
+# Colouring is performed by the __ps1_col() and __ps1_ret() functions.
+# We redirect stderr to /dev/null when calling these functions to prevent
+# bash complaining about not knowing them when you su to another user,
+# retaining PS1 but not the function definitions.
+#
+# Note that $? is passed as an argument to - and is returned from - all
+# functions. As $? is set following any shell activity it is only guaranteed
+# to represent the return code of the last command at the beginning of __ps1().
+# By passing between subsequent functions we ensure that it is available for
+# __ps1_ret().
+#
+
+# Pick a colour based on the terminal capabilities.
+# OK: dark green.
+# Failed: dark red.
+# Git: royal blue.
+# P4: yellow.
+# SVN: magenta.
+case $(tput colors) in
+ 256)
+ export PROMPT_OK_COLOUR="1;38;5;34"
+ export PROMPT_FAILED_COLOUR="1;38;5;160"
+ export GIT_COLOUR="0;38;5;33"
+ export SVN_COLOUR="0;38;5;127"
+ export P4_COLOUR="0;38;5;142"
+ ;;
-export PROMPT_OK_COLOUR=32
-export PROMPT_FAILED_COLOUR=31
+ 88)
+ export PROMPT_OK_COLOUR="1;38;5;24"
+ export PROMPT_FAILED_COLOUR="1;38;5;48"
+ export GIT_COLOUR="0;38;5;23"
+ export SVN_COLOUR="0;38;5;49"
+ export P4_COLOUR="0;38;5;56"
+ ;;
+
+ *)
+ export PROMPT_OK_COLOUR="1;32"
+ export PROMPT_FAILED_COLOUR="1;31"
+ export GIT_COLOUR="0;36"
+ export SVN_COLOUR="0;35"
+ export P4_COLOUR="0;33"
+ ;;
+esac
function __ps1() {
- export PS1='\u@\[\033[1;$(__ps1_col $?)m\]\h\[\033[0m\]$(__ps1_ret $?):\w\$ '
+ # Default __ps1_user to 1.
+ [ -z "$__ps1_user" ] && __ps1_user=1
+
+ export PS1='$(__ps1_user $? \u@)\[\033[$(__ps1_col $? 2>/dev/null)m\]$(__ps1_user $? \h)\[\033[${GIT_COLOUR}m\]$(__ps1_git $? 2>/dev/null)\[\033[0m\]\[\033[${P4_COLOUR}m\]$(__ps1_p4 $? 2>/dev/null)\[\033[0m\]\[\033[${SVN_COLOUR}m\]$(__ps1_svn $? 2>/dev/null)\[\033[0m\]$(__ps1_ret $? 2>/dev/null):\w\$ '
return 0
}
}
function __ps1_ret() {
+ [ "$__ps1_user" = "1" ] || return $1
[ $1 -gt 0 ] && echo -n " ($1)"
- return 0
+ return $1
+}
+
+function __ps1_user() {
+ local ret=$1; shift
+ [ "$__ps1_user" = "1" ] || return $ret
+ echo -n ${1+"$@"}
+ return $ret
+}
+
+function __ps1_git() {
+ [ "$__ps1_git" = "1" ] || return $1
+ if [ "$__ps1_user" = "1" ]; then
+ __git_ps1 ' %s'
+ else
+ __git_ps1 '%s'
+ fi
+ return $1
+}
+
+function __ps1_p4() {
+ [ "$__ps1_p4" = "1" ] || return $1
+ if [ "$__ps1_user" = "1" -o "$__ps1_git" = "1" ]; then
+ __p4_ps1 ' %s'
+ else
+ __p4_ps1 '%s'
+ fi
+ return $1
+}
+
+function __ps1_svn() {
+ [ "$__ps1_svn" = "1" ] || return $1
+ if [ "$__ps1_user" = "1" -o "$__ps1_git" = "1" -o "$__ps1_p4" = "1" ]; then
+ __svn_ps1 ' %s'
+ else
+ __svn_ps1 '%s'
+ fi
+ return $1
+}
+
+function prompt() {
+ local blurb="Usage: prompt hide|show <what>"
+
+ if [ $# -lt 2 ]; then
+ echo >&2 "$blurb"
+ return 1
+ fi
+
+ action="$1"
+ if [ ! "$action" = "hide" -a ! "$action" = "show" ]; then
+ echo >&2 "$blurb"
+ return 1
+ fi
+ if [ "$action" = "hide" ]; then
+ action=0
+ else
+ action=1
+ fi
+
+ what="$(echo $2 | env LANG= LC_ALL= LC_CTYPE= tr '[:upper:]' '[:lower:]')"
+ eval __ps1_$what=$action
}
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