git squash

.squash.sh

#!/bin/sh

# based on https://stackoverflow.com/a/24018435/59666

#base commit of the squash-"rebase
baseCommit=$1

#get the commit message
shift
commitMsg=$@

#regular expression to verify that squash number is an integer
regex='^[0-9]+$'

echo "---------------------------------"
echo "Will squash using $baseCommit as base"
echo "Commit message will be '$commitMsg'"

echo "...validating input"
if [ -z "$commitMsg" ]
then
    echo "Invalid commit message.  Make sure string is not empty"
else
    echo "...input looks good"
    echo "...proceeding to squash"
    git reset --soft $baseCommit
    git commit -m "$commitMsg"
    echo "...done"
fi

echo
exit 0