Add SUPPORTED_ECOSYSTEMS list for downstream use

Signed-off-by: Keshav Priyadarshi <[email protected]>

Author: keshav-space

src/fetchcode/package_versions.py

@@ -35,6 +35,21 @@
 
 router = Router()
 
+SUPPORTED_ECOSYSTEMS = [
+    "cargo",
+    "composer",
+    "conan",
+    "deb",
+    "gem",
+    "github",
+    "golang",
+    "hex",
+    "maven",
+    "npm",
+    "nuget",
+    "pypi",
+]
+
 
 def versions(purl):
     """Return all version for a PURL."""
@@ -44,7 +59,6 @@ def versions(purl):
         except NoRouteAvailable:
             return
 
-
 @dataclasses.dataclass(frozen=True)
 class PackageVersion:
     value: str