Merge pull request #414 from Laupetin/fix/generate-with-git-worktree

fix: make generate.sh work with git worktrees

generate.sh

@@ -46,13 +46,18 @@ function install_premake {
     chmod +x build/premake5
 }
 
-# Go to repository root
-cd "$(dirname "$0")" || exit 2
-
-if [[ ! -d ".git" ]]; then
+function expect_inside_git_repository {
+    inside_git_repo="$(git rev-parse --is-inside-work-tree 2>/dev/null)"
+    if [ ! -d ".git" ] && [ ! "$inside_git_repo" ]; then
         echo "You must clone the OpenAssetTools repository using 'git clone'. Please read README.md." >&2
         exit 1
     fi
+}
+
+# Go to repository root
+cd "$(dirname "$0")" || exit 2
+
+expect_inside_git_repository
 
 PREMAKE_BIN=''
 if [[ -z "$PREMAKE_NO_GLOBAL" ]] && [[ -x "$(command -v premake5)" ]]; then