git-co

#!/bin/bash

# The motto: Alias for `git checkout`

source $(dirname $0)/colors

bailout() {
	echo -n "Branch: "; $CYAN; git cbr; $RESET
	echo $ALTERNATIVES
	exit
}

default_checkout () {
	echo "Commencing the default checkout"
	git checkout $*
	bailout
}

parse_id() {
	PARSEDID=$1
	ID=`git rev-parse --verify -q $PARSEDID 2>/dev/null || echo ""`
}

try_checkout() {
	TRYID=$1
	parse_id $TRYID
	if [ "$ID" == "" ]
	then
		# echo "Could not find $TRYID"
		return 1
	fi
	echo "Checking out $*"
	git checkout $TRYID
	# echo $?
	git dibst
	bailout
}

if [ "$#" != "1" ]; then
	default_checkout $*
fi

COMMIT=$1
echo $COMMIT | egrep -q ^[[:digit:]]\{1,4\}$
if [ "$?" == "1" ]; then
	default_checkout $*
fi

try_checkout "$COMMIT"
try_checkout "feature/$COMMIT"

ALTERNATIVES=`git brr | grep -w $COMMIT | awk '{ print gensub("origin/", "", $1); }'| tr -d '\n'`
ALTERNATIVESCOUNT=`echo $ALTERNATIVES | wc -w`

if [ "$ALTERNATIVESCOUNT" == "0" ]; then
	ALTERNATIVES=`git brr|egrep -e [^[:digit:]]$COMMIT$ -e [^[:digit:]]$COMMIT[^[:digit:]]`
	ALTERNATIVESCOUNT=`echo $ALTERNATIVES | wc -w`
fi

if [ "$ALTERNATIVESCOUNT" == "0" ]; then
	ALTERNATIVES=`git br|egrep -e [^[:digit:]]$COMMIT$ -e [^[:digit:]]$COMMIT[^[:digit:]]`
	ALTERNATIVESCOUNT=`echo $ALTERNATIVES | wc -w`
fi

# echo $ALTERNATIVES
# echo $ALTERNATIVESCOUNT
# exit

if [ "$ALTERNATIVESCOUNT" == "0" ]; then
	ALTERNATIVES=`git brr|egrep -e [^[:digit:]]$COMMIT$ -e [^[:digit:]]$COMMIT[^[:digit:]]`
	bailout
fi

if [ "$ALTERNATIVESCOUNT" == "1" ]; then
	try_checkout $ALTERNATIVES
	default_checkout $ALTERNATIVES
fi

DIALOG=""
j=0
for i in $ALTERNATIVES
do
	j=$((j+1))
	DIALOG="$DIALOG $i $j off"
done

SELECTION=`dialog --radiolist "What to checkout?" 20 100 19 $DIALOG 3>&1 1>&2 2>&3 3>&-`
if [ -z "$SELECTION" ]; then
	echo "No selection"
	bailout
fi

default_checkout $SELECTION