better job handling

.github/workflows/modoboa.yml

@@ -174,8 +174,6 @@ jobs:
           yarn build
           cd ..
       - name: Build packages
-        env:
-          IS_RELEASE: yes
         run: |
           sudo apt-get install librrd-dev rrdtool libssl-dev
           python -m pip install --upgrade pip build

modoboa/version.py

@@ -8,8 +8,8 @@ def local_scheme(version):
 def get_version():
     from setuptools_scm import get_version as default_version
     github_version = os.environ.get('GITHUB_REF_NAME', None)
-    is_release = os.environ.get('IS_RELEASE', None)
-    if is_release is not None and github_version is not None:
+    github_type = os.environ.get('GITHUB_REF_TYPE', None)
+    if github_version is not None and github_type == "tag":
         print(f"GITHUB_REF_NAME found, using version: {github_version}")
         return github_version
     return default_version(local_scheme=local_scheme)