explicit require for arbitrary git urls

Author: kyleburton

bake

@@ -124,11 +124,47 @@ function bake_url_to_package_path () {
   echo "$BAKE_PACKAGES_PATH/$fpath"
 }
 
+function bake_require_git () {
+  local url="$1"
+  local libpath="$2"
+  local tag="${3:-master}"
+
+  bake_ensure_bake_packages_path
+
+  pushd $BAKE_PACKAGES_PATH >/dev/null
+
+  # git@github.com:kyleburton/bake-recipes.git
+  # https://github.com/kyleburton/bake-recipes.git
+  # strip the leading git@, http:// or https://
+  local full_package_path="$(echo "$url" | sed 's/^git@//' | sed 's/https:\/\///' | sed 's/http:\/\///' | sed 's/.git$//' | sed 's/:/\//')"
+  local package_path="$(dirname "$full_package_path")"
+
+  test -d "$package_path" || mkdir -p "$package_path"
+  cd "$package_path"
+  local dname="$(basename "$full_package_path")"
+  if [ ! -d "$dname" ]; then
+    git clone "$url"
+    cd "$dname"
+    git fetch
+    git co "$tag"
+  fi
+
+  popd
+
+  # translate the require path to local fs path
+  # source it!
+  source "$BAKE_PACKAGES_PATH/$full_package_path/$libpath"
+}
+
+function bake_ensure_bake_packages_path () {
+  test -d $BAKE_PACKAGES_PATH || mkdir -p $BAKE_PACKAGES_PATH
+}
+
 function bake_package_install () {
   local url="$1"
   local tag="${2:-master}"
 
-  test -d $BAKE_PACKAGES_PATH || mkdir -p $BAKE_PACKAGES_PATH
+  bake_ensure_bake_packages_path
   pushd $BAKE_PACKAGES_PATH
   local git_project_name="$(echo $url | awk -F/ '{print $3 }')"
   local git_host_and_user="$(echo $url | awk -F/ '{print $1 "/" $2 }')"