core/pkgs/build-support/rust/replace-workspace-values.py

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2024-05-02 00:46:19 +00:00
# This script implements the workspace inheritance mechanism described
# here: https://doc.rust-lang.org/cargo/reference/workspaces.html#the-package-table
#
# Please run `mypy --strict`, `black`, and `isort --profile black` on this after editing, thanks!
import sys
from typing import Any
import tomli
import tomli_w
def load_file(path: str) -> dict[str, Any]:
with open(path, "rb") as f:
return tomli.load(f)
def replace_key(
workspace_manifest: dict[str, Any], table: dict[str, Any], section: str, key: str
) -> bool:
if (
isinstance(table[key], dict)
and "workspace" in table[key]
and table[key]["workspace"] is True
):
print("replacing " + key)
replaced = table[key]
del replaced["workspace"]
workspace_copy = workspace_manifest[section][key]
if section == "dependencies":
crate_features = replaced.get("features")
if type(workspace_copy) is str:
replaced["version"] = workspace_copy
else:
replaced.update(workspace_copy)
merged_features = (crate_features or []) + (
workspace_copy.get("features") or []
)
if len(merged_features) > 0:
# Dictionaries are guaranteed to be ordered (https://stackoverflow.com/a/7961425)
replaced["features"] = list(dict.fromkeys(merged_features))
elif section == "package":
table[key] = replaced = workspace_copy
return True
return False
def replace_dependencies(
workspace_manifest: dict[str, Any], root: dict[str, Any]
) -> bool:
changed = False
for key in ["dependencies", "dev-dependencies", "build-dependencies"]:
if key in root:
for k in root[key].keys():
changed |= replace_key(workspace_manifest, root[key], "dependencies", k)
return changed
def main() -> None:
top_cargo_toml = load_file(sys.argv[2])
if "workspace" not in top_cargo_toml:
# If top_cargo_toml is not a workspace manifest, then this script was probably
# ran on something that does not actually use workspace dependencies
print(f"{sys.argv[2]} is not a workspace manifest, doing nothing.")
return
crate_manifest = load_file(sys.argv[1])
workspace_manifest = top_cargo_toml["workspace"]
if "workspace" in crate_manifest:
return
changed = False
for key in crate_manifest["package"].keys():
changed |= replace_key(
workspace_manifest, crate_manifest["package"], "package", key
)
changed |= replace_dependencies(workspace_manifest, crate_manifest)
if "target" in crate_manifest:
for key in crate_manifest["target"].keys():
changed |= replace_dependencies(
workspace_manifest, crate_manifest["target"][key]
)
if (
"lints" in crate_manifest
and "workspace" in crate_manifest["lints"]
and crate_manifest["lints"]["workspace"] is True
):
crate_manifest["lints"] = workspace_manifest["lints"]
if not changed:
return
with open(sys.argv[1], "wb") as f:
tomli_w.dump(crate_manifest, f)
if __name__ == "__main__":
main()