git-squash: script to create a squashed patch from a branch.

git-squash.sh

#! /bin/sh
# Produce a squash-commit patch from a branch of changes
# Usage example: sh git-squash.sh master <branch_to_squash>
MASTER=$1
PATCHBRANCH=$2
SQUASHBRANCH="$PATCHBRANCH-squash"

git checkout -b "$SQUASHBRANCH" $MASTER &&
git merge --squash "$PATCHBRANCH" &&
git commit -a -m "Squash commit" &&
git format-patch "$MASTER" --stdout > "squash.patch" &&
git checkout "$PATCHBRANCH" &&
git branch -D "$SQUASHBRANCH"