A git script to pull branches of github users to a local clone - for reviewing and testing Github PRs locally

git-ghrw

#!/bin/bash


USER=$1
BRANCH=$2

function show_help {
    cat <<HEREDOC

Summary:

    Checkout a Github user's branch locally for review.

Usage:

    git-ghrw USERNAME BRANCH

This script first checks out the master branch, updates it by pulling
in "upstream/master", then creates a new branch there named
"USERNAME-BRANCH". If a remote named "upstream" is not configured,
"origin" is tried instead.

Then it pulls in BRANCH from the Github user's fork, i.e. it executes:

    git pull -q https://github.com/USERNAME/REPO_NAME BRANCH

The REPO_NAME is detected from the current directory.
HEREDOC

}

if [ -z $USER ]; then
    echo "Please provide a GitHub username - changes from their fork will be pulled in"
    show_help
    exit 1
fi

if [ -z $BRANCH ]; then
    echo "Please provide the branch of the user to pull in"
    show_help
    echo "Hello world"
    exit 1
fi

set -e

GIT_DIR=$(git rev-parse --show-toplevel)
REPO_NAME=$(basename $GIT_DIR)
LOCAL_BRANCH=${USER}-${BRANCH}

if $(git remote | grep -q upstream); then
    REMOTE=upstream
else
    REMOTE=origin
fi

cd $GIT_DIR
echo "Pulling ${REMOTE}/master -> master and creating new branch $LOCAL_BRANCH."
git checkout -q master && git pull -q ${REMOTE} master && git checkout -q -B $LOCAL_BRANCH
echo "Pulling https://github.com/$USER/$REPO_NAME:$BRANCH"
git pull -q https://github.com/$USER/$REPO_NAME $BRANCH