Remove core schema validation

The code used to generate the self schema is inspecting annotations
in a way that isn't compatible with Python 3.14.

Author: Viicos

.github/actions/build-pgo-wheel/action.yml

@@ -14,11 +14,6 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - name: prepare self schema
-      shell: bash
-      # generate up front so that we don't have to do this inside the docker container
-      run: uv run python generate_self_schema.py
-
     - name: prepare profiling directory
       shell: bash
       # making this ahead of the compile ensures that the local user can write to this

.github/workflows/ci.yml

@@ -476,9 +476,6 @@ jobs:
 
       - run: pip install -U twine 'ruff==0.5.0' typing_extensions
 
-      # generate self-schema now, so we don't have to do so inside docker in maturin build
-      - run: python generate_self_schema.py
-
       - name: build wheels
         uses: PyO3/maturin-action@v1
         with:

.gitignore

@@ -34,7 +34,6 @@ node_modules/
 /*.profraw
 /foobar.py
 /python/pydantic_core/*.so
-/src/self_schema.py
 
 # samply
 /profile.json

Cargo.toml

@@ -12,10 +12,8 @@ include = [
     "/LICENSE",
     "/Makefile",
     "/build.rs",
-    "/generate_self_schema.py",
     "/rust-toolchain",
     "/src",
-    "!/src/self_schema.py",
     "/python/pydantic_core",
     "/tests",
     "/.cargo",

Makefile

@@ -1,5 +1,5 @@
 .DEFAULT_GOAL := all
-sources = python/pydantic_core tests generate_self_schema.py wasm-preview/run_tests.py
+sources = python/pydantic_core tests wasm-preview/run_tests.py
 
 mypy-stubtest = uv run python -m mypy.stubtest pydantic_core._pydantic_core --allowlist .mypy-stubtest-allowlist
 
@@ -124,7 +124,6 @@ clean:
 	rm -f `find . -type f -name '*.py[co]' `
 	rm -f `find . -type f -name '*~' `
 	rm -f `find . -type f -name '.*~' `
-	rm -rf src/self_schema.py
 	rm -rf .cache
 	rm -rf htmlcov
 	rm -rf .pytest_cache

build.rs

@@ -1,35 +1,3 @@
-use std::env;
-use std::path::Path;
-use std::process::Command;
-use std::str::from_utf8;
-
-fn generate_self_schema() {
-    println!("cargo:rerun-if-changed=python/pydantic_core/core_schema.py");
-    println!("cargo:rerun-if-changed=generate_self_schema.py");
-    if Path::new("./src/self_schema.py").exists() && option_env!("CI") == Some("true") {
-        // self_schema.py already exists and CI indicates we're running on a github actions build,
-        // don't bother generating again
-        return;
-    }
-
-    let output = Command::new(
-        env::var("PYTHON")
-            .ok()
-            .or_else(|| pyo3_build_config::get().executable.clone())
-            .unwrap_or_else(|| "python3".to_owned()),
-    )
-    .arg("generate_self_schema.py")
-    .output()
-    .expect("failed to execute process");
-
-    if !output.status.success() {
-        let stdout = from_utf8(&output.stdout).unwrap();
-        let stderr = from_utf8(&output.stderr).unwrap();
-        eprint!("{stdout}{stderr}");
-        panic!("generate_self_schema.py failed with {}", output.status);
-    }
-}
-
 fn main() {
     pyo3_build_config::use_pyo3_cfgs();
     if let Some(true) = version_check::supports_feature("coverage_attribute") {
@@ -44,7 +12,5 @@ fn main() {
         println!("cargo:rustc-cfg=specified_profile_use");
     }
     println!("cargo:rustc-check-cfg=cfg(specified_profile_use)");
-
-    generate_self_schema();
     println!("cargo:rustc-env=PROFILE={}", std::env::var("PROFILE").unwrap());
 }

generate_self_schema.py

@@ -1010,12 +1010,3 @@ class TzInfo(datetime.tzinfo):
         More info can be found at [`tzinfo.fromutc`][datetime.tzinfo.fromutc]."""
 
     def __deepcopy__(self, _memo: dict[Any, Any]) -> TzInfo: ...
-
-def validate_core_schema(schema: CoreSchema, *, strict: bool | None = None) -> CoreSchema:
-    """Validate a core schema.
-
-    This currently uses lax mode for validation (i.e. will coerce strings to dates and such)
-    but may use strict mode in the future.
-    We may also remove this function altogether, do not rely on it being present if you are
-    using pydantic-core directly.
-    """

python/pydantic_core/_pydantic_core.pyi

@@ -953,7 +953,7 @@ class DateSchema(TypedDict, total=False):
     gt: date
     now_op: Literal['past', 'future']
     # defaults to current local utc offset from `time.localtime().tm_gmtoff`
-    # value is restricted to -86_400 < offset < 86_400 by bounds in generate_self_schema.py
+    # value is restricted to -86_400 < offset < 86_400:
     now_utc_offset: int
     ref: str
     metadata: dict[str, Any]