git-merge-pullreq.sh

#!/bin/bash

if [[ $# -lt 0 ]] || [[ $# -gt 2 ]]; then
  echo "Usage: $0 <pull request id> [<directory>]"
fi

PULL_REQ_ID="$1"

if [[ "x$2" != 'x' ]]; then
  cd "$2" || exit 1
fi

# Git information
GIT_STATUS="$(git status 2> /dev/null)"
if [[ "$?" != "0" ]]; then
  echo "Not a git repository: `pwd`"
  exit 2
fi

# Origin
GIT_REMOTE="$(git remote --verbose)"
if [[ ${GIT_REMOTE} =~ (origin[^a-z]*([^ ]*) *\(push\)) ]]; then
  GIT_ORIGIN="${BASH_REMATCH[2]}"
  if [[ ${GIT_ORIGIN} =~ (.*[/@]github\.com[/:]([-_a-zA-Z0-9/\.]*)\.git) ]]; then
    GITHUB_ORIGIN="${BASH_REMATCH[2]}"
  else
    echo "Not a github repository: $GIT_ORIGIN"
    exit 4
  fi
else
  echo "Not a github repository: `pwd`"
  exit 3
fi

TMPFILE=`mktemp -q -t pullreq` || echo "Failed to create a temporary file." || exit 5

echo "Fetching the pull request $PULL_REQ_ID from $GITHUB_ORIGIN .. "

PULL_REQ_URL="https://github.com/$GITHUB_ORIGIN/pull/$1.patch"
curl -sS "$PULL_REQ_URL" > "$TMPFILE"

head -1 "$TMPFILE" | grep -q -e '^From'

if [[ $? -ne 0 ]]; then
  echo "Not a pull request: $PULL_REQ_URL"
  rm -f "$TMPFILE"
  exit 6
fi

echo "Running: git am $TMPFILE"
git am "$TMPFILE"
rm -f "$TMPFILE"