Build fails when using source from Releases page

[dpxcc]

What happens?

Users who download the source code from the Releases page won't be able to follow the current build instructions

This is because Makefile assumes the source is in a git repository, which is not the case for release archives

To Reproduce

1. Download and unzip source code from Releases page
2. Run make

root@14108219e845:/pg_duckdb-0.3.1# make 
git submodule update --init --recursive
fatal: not a git repository (or any of the parent directories): .git
make: *** [Makefile:95: .git/modules/third_party/duckdb/HEAD] Error 128

OS:

MacOS

pg_duckdb Version (if built from source use commit hash):

0.3.1

Postgres Version (if built from source use commit hash):

17.5

Hardware:

No response

Full Name:

Cheng Chen

Affiliation:

Mooncake Labs

What is the latest build you tested with? If possible, we recommend testing with the latest nightly build.

I have tested with a source build

Did you include all relevant data sets for reproducing the issue?

Yes

Did you include all code required to reproduce the issue?

• [x] Yes, I have

Did you include all relevant configuration (e.g., CPU architecture, Linux distribution) to reproduce the issue?

• [x] Yes, I have

[JelteF]

It would be nice to have this work, but I don't think there's a no easy way. Feel free to create a PR if you can think of one.