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-rw-r--r--for_dev/how_to_use_github_to_contribute_to_gudhi.md7
1 files changed, 7 insertions, 0 deletions
diff --git a/for_dev/how_to_use_github_to_contribute_to_gudhi.md b/for_dev/how_to_use_github_to_contribute_to_gudhi.md
index 1ca40386..358825f3 100644
--- a/for_dev/how_to_use_github_to_contribute_to_gudhi.md
+++ b/for_dev/how_to_use_github_to_contribute_to_gudhi.md
@@ -25,6 +25,13 @@ This creates a directory gudhi-devel, which you are free to move around or renam
cd gudhi-devel
```
+## Submodule
+An interface to Hera for Wasserstein distanceis available on an external git repository.
+Everytime you checkout master or merge from master, afterwards, you will need to run the command:
+```bash
+git submodule update --init
+```
+
## Configuring a remote for a fork
```bash
git remote add upstream https://github.com/GUDHI/gudhi-devel.git