examine pull requests nicely in vim

pr

#!/bin/bash
# Examine a pull request!
# Usage: $0 <github username> <branch name> OR $0 <pull request #>

# TODO: move to env?
MY_GH_USER=rhowardiv
MY_GH_PASS=XXXXXXXX

GH_REPO=AYI

CHECK_ORIGIN=$(git remote -v | grep '^origin.\+(push)$')
if [ -z "$CHECK_ORIGIN" ]; then
	echo "You need to be in a git repo with a pushable \"origin\" remote!"
	exit 1
fi

GIT_STASH=$(git status --porcelain | grep -v '^??')

if [ -n "$GIT_STASH" ]; then
	echo "Stashing current state..."
	git stash
fi

ON_BRANCH=$(git branch | grep '^* ' | sed 's/^* //')

on_exit () {
	echo "Switching back to $ON_BRANCH..."
	git co "$ON_BRANCH"
	if [ -n "$GIT_STASH" ]; then
		echo "Restoring stash..."
		git stash pop
	fi

	if [ -n "$TEMP_BRANCH" ]; then
		git branch -D "$TEMP_BRANCH"
	fi
}
trap on_exit EXIT

if [ -z $2 ]; then
	echo -n "Fetching pull request info from github..."
	GH_PR=$(curl -s "https://$MY_GH_USER:$MY_GH_PASS@api.github.com/repos/SnapInteractive/AYI/pulls/$1")
	echo " Done."
	LABEL=$(echo "$GH_PR" | grep -m 1 '^[^"]*"label"')
	if [ -z "$LABEL" ]; then
		echo "Pull request not found or could not get head.label field from pull request!"
		echo "To see the pull request data, run:"
		echo "https://$MY_GH_USER:[password]@api.github.com/repos/SnapInteractive/AYI/pulls/$1"
		exit 1
	fi
	GH_USER=$(echo "$LABEL" | sed 's/^.*"label": "\([^"]\+\):.\+$/\1/')
	GH_BRANCH=$(echo "$LABEL" | sed 's/^.*"label": "[^"]\+:\([^"]\+\).\+$/\1/')

	if [ -z "$GH_USER" -o -z "$GH_BRANCH" -o -n "$(echo "$GH_USER:$GH_BRANCH" | grep '"')" ]; then
		echo "Couldn't extract github user:branch from PR? ($GH_USER:$GH_BRANCH)"
		exit 1
	fi
else
	GH_USER="$1"
	GH_BRANCH="$2"
fi

TEMP_BRANCH="$GH_USER-$GH_BRANCH"

git co -b "$TEMP_BRANCH" master && \
git pull https://$MY_GH_USER:$MY_GH_PASS@github.com/$GH_USER/$GH_REPO.git "$GH_BRANCH"

if [ $? -ne 0 ]; then
	echo "Failed fetching branch \"$GH_BRANCH\" from \"$GH_USER\"'s repo!"
	exit 1
fi

# see this function in my dotfiles/vimrc file
vim '+call Gbdiff("master")'

exit 0