build: package prebuilt Codex entrypoints

scripts/codex_package/version.py

@@ -0,0 +1,29 @@
+"""Version discovery for Codex packages."""
+
+import re
+
+from .targets import REPO_ROOT
+
+
+WORKSPACE_VERSION_PATTERN = re.compile(r'^version\s*=\s*"([^"]+)"')
+
+
+def read_workspace_version() -> str:
+    cargo_toml = REPO_ROOT / "codex-rs" / "Cargo.toml"
+    in_workspace_package = False
+    with open(cargo_toml, encoding="utf-8") as fh:
+        for line in fh:
+            stripped = line.strip()
+            if stripped == "[workspace.package]":
+                in_workspace_package = True
+                continue
+
+            if in_workspace_package and stripped.startswith("["):
+                break
+
+            if in_workspace_package:
+                match = WORKSPACE_VERSION_PATTERN.match(stripped)
+                if match is not None:
+                    return match.group(1)
+
+    raise RuntimeError(f"Could not find [workspace.package].version in {cargo_toml}")