Deprecate python-source option in Cargo.toml

Changelog.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Tighten src-layout detection logic in [#1281](https://github.com/PyO3/maturin/pull/1282)
 * Fix generating pep517 sdist for src-layout in [#1288](https://github.com/PyO3/maturin/pull/1288)
+* Deprecate `python-source` option in Cargo.toml in [#1291](https://github.com/PyO3/maturin/pull/1291)
 
 ## [0.14.1] - 2022-11-20
 

README.md

@@ -114,8 +114,7 @@ my-project
     └── lib.rs
 ```
 
-You can specify a different python source directory in `pyproject.toml` by setting `tool.maturin.python-source`
-or in `Cargo.toml` by setting `package.metadata.maturin.python-source`, for example
+You can specify a different python source directory in `pyproject.toml` by setting `tool.maturin.python-source`, for example
 
 **pyproject.toml**
 
@@ -124,13 +123,6 @@ or in `Cargo.toml` by setting `package.metadata.maturin.python-source`, for exam
 python-source = "python"
 ```
 
-**Cargo.toml**
-
-```toml
-[package.metadata.maturin]
-python-source = "python"
-```
-
 then the project structure would look like this:
 
 ```

guide/src/project_layout.md

@@ -80,8 +80,7 @@ modules. A popular way to avoid this is with the `src`-layout, where the Python
 package is nested within a `src` directory. Unfortunately this interferes with
 the structure of a typical Rust project. Fortunately, Python is nor particular
 about the name of the parent source directory. You tell maturin to use a
-different Python source directory in `pyproject.toml` by setting `tool.maturin.python-source`
-or in `Cargo.toml` by setting `package.metadata.maturin.python-source`, for example
+different Python source directory in `pyproject.toml` by setting `tool.maturin.python-source`, for example
 
 **pyproject.toml**
 
@@ -90,13 +89,6 @@ or in `Cargo.toml` by setting `package.metadata.maturin.python-source`, for exam
 python-source = "python"
 ```
 
-**Cargo.toml**
-
-```toml
-[package.metadata.maturin]
-python-source = "python"
-```
-
 then the project structure would look like this:
 
 ```
@@ -117,7 +109,6 @@ If the Python module created by Rust has the same name as the Python package in
 
 ```toml
 [package.metadata.maturin]
-python-source = "python"
 name = "my_project._my_project"
 ```
 

src/develop.rs

@@ -126,13 +126,13 @@ pub fn develop(
         }
         if !output.stderr.is_empty() {
             eprintln!(
-                "⚠️  Warning: pip raised a warning running {:?}:\n{}",
+                "⚠️ Warning: pip raised a warning running {:?}:\n{}",
                 &command,
                 String::from_utf8_lossy(&output.stderr).trim(),
             );
         }
         println!(
-            "🛠  Installed {}-{}",
+            "🛠 Installed {}-{}",
             build_context.metadata21.name, build_context.metadata21.version
         );
     }

src/project_layout.rs

@@ -136,9 +136,12 @@ impl ProjectResolver {
             manifest_dir
         };
         let py_root = match pyproject.and_then(|x| x.python_source()) {
-            Some(py_src) => py_src.to_path_buf(),
+            Some(py_src) => project_root.join(py_src),
             None => match extra_metadata.python_source.as_ref() {
-                Some(py_src) => manifest_dir.join(py_src),
+                Some(py_src) => {
+                    println!("⚠️ Warning: specify python-source in Cargo.toml is deprecated, use python-source in [tool.maturin] section in pyproject.toml instead");
+                    manifest_dir.join(py_src)
+                }
                 None => match pyproject.and_then(|x| x.project_name()) {
                     Some(project_name) => {
                         // Detect src layout

test-crates/pyo3-mixed-py-subdir/Cargo.toml

@@ -14,5 +14,4 @@ name = "pyo3_mixed_py_subdir"
 crate-type = ["cdylib"]
 
 [package.metadata.maturin]
-python-source = "python"
 name = "pyo3_mixed_py_subdir._pyo3_mixed"

test-crates/pyo3-mixed-py-subdir/pyproject.toml

@@ -12,3 +12,6 @@ requires-python = ">=3.6"
 
 [project.scripts]
 get_42 = "pyo3_mixed_py_subdir:get_42"
+
+[tool.maturin]
+python-source = "python"