Make install_Requirements more resilient

Author: georgesittas

sqlglotc/setup.py

@@ -130,20 +130,30 @@ def run(self):
 
 def _sqlglot_requirement():
     """Pin sqlglot to the matching version so resolvers keep the two packages in lockstep."""
-    pkg_info = os.path.join(os.path.dirname(os.path.abspath(__file__)), "PKG-INFO")
-    if os.path.isfile(pkg_info):
-        # Building from an sdist: no git metadata; the released version is frozen in PKG-INFO.
-        with open(pkg_info, encoding="utf-8") as fd:
-            version = next(
-                (line.split(":", 1)[1].strip() for line in fd if line.startswith("Version:")), ""
+    try:
+        pkg_info = os.path.join(os.path.dirname(os.path.abspath(__file__)), "PKG-INFO")
+        if os.path.isfile(pkg_info):
+            # Building from an sdist: no git metadata; the released version is frozen in PKG-INFO.
+            with open(pkg_info, encoding="utf-8") as fd:
+                version = next(
+                    (line.split(":", 1)[1].strip() for line in fd if line.startswith("Version:")),
+                    "",
+                )
+        else:
+            from setuptools_scm import get_version
+
+            version = get_version(
+                root="..",
+                relative_to=__file__,
+                local_scheme="no-local-version",
+                fallback_version="0.0.0",
             )
-    else:
-        from setuptools_scm import get_version
+    except Exception as e:
+        print(f"sqlglotc: failed to determine the sqlglot version to pin, skipping it: {e}")
+        version = ""
 
-        version = get_version(root="..", relative_to=__file__, local_scheme="no-local-version")
-
-    # Dev builds have no matching sqlglot release on PyPI, so skip the pin.
-    return [] if not version or ".dev" in version else [f"sqlglot=={version}"]
+    # Dev and fallback (no git metadata) builds have no matching sqlglot release on PyPI.
+    return [] if version in ("", "0.0.0") or ".dev" in version else [f"sqlglot=={version}"]
 
 
 setup(