From ad9a5431840505ce6baca7861058eaa75baab077 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan.goodliffe@octal.co.uk>
Date: Fri, 27 Aug 2021 11:30:52 +0100
Subject: Functions to support useful prompts

---
 bashrc | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/bashrc b/bashrc
index 3580770..abf2988 100644
--- a/bashrc
+++ b/bashrc
@@ -170,6 +170,63 @@ showdiff() {
 	local feat=${1-HEAD} target=${2-origin/master}
 	diffWith "git diff $target...$feat -w -D -M --patience --find-copies-harder"
 }
+style_reset() {
+	echo -ne "\001\e[0m\002"
+}
+style_set() {
+	echo -ne "\001\e[${1};${2}m\002"
+}
+style_message() {
+	echo -ne " $(style_set $1 $2)$3$(style_reset)"
+}
+git_prompt() {
+  local branchname=$(git branch --show-current 2> /dev/null)
+	if [[ -n $branchname ]]; then
+		local detail=$(git branch --list $branchname -v 2> /dev/null)
+		local status=$(git status --porcelain 2> /dev/null)
+		local style=00
+		local color=92
+		if [[ $detail =~ ahead\ [0-9] ]]; then
+			if [[ $detail =~ behind\ [0-9] ]]; then
+				style=05
+			else
+				style=03
+			fi
+		elif [[ $detail =~ behind\ [0-9] ]]; then
+			style=04
+		fi
+		if [[ -n $status ]]; then
+			color=96
+		fi
+		style_message $style $color $branchname
+	fi
+}
+bjam_prompt() {
+	if [[ -f Jamfile.jam || -f Jamroot.jam ]]; then
+		local updates=$(bjam -nd1 | sed -n 's/^\.\.\.updated \([0-9]\+\) targets\.\.\.$/\1/p')
+		if [[ -n $updates ]]; then
+			style_message 01 31 $updates
+		fi
+	fi
+}
+result_prompt() {
+	case $1 in
+		0)
+			style_message 00 32 ✔
+			;;
+		"")
+			style_message 01 34 $
+			;;
+		*)
+			style_message 01 91 ✘
+			;;
+	esac
+}
+prompts() {
+	local res=$?
+	git_prompt
+	result_prompt $res
+}
 gppdmb() {
 	PARENT=${1:-master}
 	git checkout $PARENT && git pull --prune && git delete-merged-branches
-- 
cgit v1.2.3