build-gh-pages.sh

#!/bin/bash
set -e

HERE=$(cd -L $(dirname -- $0); pwd)
export PATH="$HERE/node_modules/.bin":"$PATH"
export GIT_DIR="$HERE/.git"
export GIT_INDEX_FILE=$(mktemp "$GIT_DIR/TEMP.XXXXXX")

function gentree() {
    echo "100644 blob $(git hash-object -w <(bundle index.js))"$'\t'"bundle.js"
    echo "100644 blob $(git hash-object -w index.css)"$'\t'"index.css"
    echo "100644 blob $(git hash-object -w bundle.html)"$'\t'"index.html"
    echo "100644 blob $(git hash-object -w CNAME)"$'\t'"CNAME"
}

OVERLAY=$(gentree | git mktree)
git read-tree --empty
git read-tree --prefix=/ $OVERLAY
TREE=$(git write-tree --missing-ok)
PARENT=$(git rev-parse refs/heads/master)
COMMIT=$(git commit-tree -p $PARENT $TREE < <(echo Create bundles))
git update-ref refs/heads/gh-pages $COMMIT

rm $GIT_INDEX_FILE