Rename every Readme.md to README.md

Otherwise `cargo package --list --allow-dirty` outputs both `README.md` and `Readme.md`

```
Cargo.toml
Cargo.toml.orig
LICENSE
README.md
Readme.md
check_installed/check_installed.py
pyo3_pure.pyi
pyproject.toml
src/lib.rs
tests/test_pyo3_pure.py
tox.ini
```

Cargo.toml

@@ -5,7 +5,7 @@ version = "0.14.0-beta.3"
 description = "Build and publish crates with pyo3, rust-cpython and cffi bindings as well as rust binaries as python packages"
 exclude = ["test-crates/**/*", "sysconfig/*", "test-data/*", "ci/*", "tests/*", "guide/*", ".github/*"]
 homepage = "https://github.com/pyo3/maturin"
-readme = "Readme.md"
+readme = "README.md"
 repository = "https://github.com/pyo3/maturin"
 license = "MIT OR Apache-2.0"
 keywords = ["python", "cffi", "packaging", "pypi", "pyo3"]

MANIFEST.in

@@ -1,5 +1,5 @@
 include Cargo.toml Cargo.lock
-include Readme.md
+include README.md
 include license-apache license-mit
 recursive-include src *.rs *.py
 recursive-include src/auditwheel *.json

Readme.md → README.md

@@ -103,7 +103,7 @@ my-project
 │   ├── __init__.py
 │   └── bar.py
 ├── pyproject.toml
-├── Readme.md
+├── README.md
 └── src
     └── lib.rs
 ```
@@ -135,7 +135,7 @@ my-project
 │       ├── __init__.py
 │       └── bar.py
 ├── pyproject.toml
-├── Readme.md
+├── README.md
 └── src
     └── lib.rs
 ```
@@ -156,7 +156,7 @@ my-project
 │   ├── __init__.py
 │   ├── bar.py
 │   └── my_project.cpython-36m-x86_64-linux-gnu.so
-├── Readme.md
+├── README.md
 └── src
     └── lib.rs
 ```

ci/build_deb.sh

@@ -30,7 +30,7 @@ install -Dm755 "target/$TARGET/release/$BINARY_NAME" "$tempdir/usr/bin/$BINARY_N
 strip "$tempdir/usr/bin/$BINARY_NAME"
 
 # readme and license
-install -Dm644 Readme.md "$tempdir/usr/share/doc/$BINARY_NAME/Readme.md"
+install -Dm644 README.md "$tempdir/usr/share/doc/$BINARY_NAME/README.md"
 install -Dm644 license-mit "$tempdir/usr/share/doc/$BINARY_NAME/license-mit"
 install -Dm644 license-apache "$tempdir/usr/share/doc/$BINARY_NAME/license-apache"
 

guide/src/index.md

@@ -4,4 +4,4 @@ Welcome to the maturin user guide! It contains examples and documentation to exp
 
 Please choose from the chapters on the left to jump to individual topics, or continue below to start with maturin's README.
 
-{{#include ../../Readme.md}}
+{{#include ../../README.md}}

guide/src/project_layout.md

@@ -56,7 +56,7 @@ my-rust-and-python-project
 │   ├── __init__.py
 │   └── bar.py
 ├── pyproject.toml
-├── Readme.md
+├── README.md
 └── src
     └── lib.rs
 ```

setup.py

@@ -38,7 +38,7 @@ def finalize_options(self):
 except ImportError:
     bdist_wheel = None
 
-with open("Readme.md", encoding="utf-8", errors="ignore") as fp:
+with open("README.md", encoding="utf-8", errors="ignore") as fp:
     long_description = fp.read()
 
 with open("Cargo.toml", "rb") as fp:

src/metadata.rs

@@ -744,7 +744,7 @@ mod test {
         );
         assert_eq!(
             metadata.description,
-            Some(fs_err::read_to_string("test-crates/pyo3-pure/Readme.md").unwrap())
+            Some(fs_err::read_to_string("test-crates/pyo3-pure/README.md").unwrap())
         );
         assert_eq!(metadata.classifiers, &["Programming Language :: Rust"]);
         assert_eq!(

src/project_layout.rs

@@ -231,7 +231,7 @@ impl ProjectResolver {
                 // Detect src layout:
                 //
                 // my-project
-                // ├── Readme.md
+                // ├── README.md
                 // ├── pyproject.toml
                 // ├── src
                 // │   └── my_project

test-crates/hello-world/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 authors = ["konstin <konstin@mailbox.org>"]
 edition = "2018"
 # Test references to out-of-project files
-readme = "../../Readme.md"
+readme = "../../README.md"
 default-run = "hello-world"
 
 [dependencies]

test-crates/pyo3-ffi-pure/pyproject.toml

@@ -8,7 +8,7 @@ classifiers = [
     "Programming Language :: Rust"
 ]
 description = "Tests compilation of packages using pyo3-ffi bindings"
-readme = "Readme.md"
+readme = "README.md"
 maintainers = [
     {name = "messense", email = "messense@icloud.com"}
 ]

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

@@ -3,7 +3,7 @@ authors = ["konstin <konstin@mailbox.org>"]
 name = "pyo3-mixed-py-subdir"
 version = "2.1.3"
 description = "Implements a dummy function combining rust and python"
-readme = "Readme.md"
+readme = "README.md"
 edition = "2018"
 
 [dependencies]

test-crates/pyo3-mixed-submodule/Cargo.toml

@@ -3,7 +3,7 @@ authors = ["konstin <konstin@mailbox.org>"]
 name = "pyo3-mixed-submodule"
 version = "2.1.3"
 description = "Implements a dummy function combining rust and python"
-readme = "Readme.md"
+readme = "README.md"
 edition = "2018"
 
 [package.metadata.maturin]

test-crates/pyo3-pure/pyproject.toml

@@ -14,7 +14,7 @@ classifiers = [
     "Programming Language :: Rust"
 ]
 description = "Implements a dummy function in Rust"
-readme = "Readme.md"
+readme = "README.md"
 maintainers = [
     {name = "messense", email = "messense@icloud.com"}
 ]

test-crates/update_readme.py

@@ -5,7 +5,7 @@
 
 
 FILES = [
-    "Readme.md",
+    "README.md",
     "guide/src/develop.md",
     "guide/src/tutorial.md",
     "guide/src/distribution.md",

tests/run.rs

@@ -404,7 +404,6 @@ fn workspace_members_non_local_dep_sdist() {
             "pyo3_pure-0.1.0+abc123de/LICENSE",
             "pyo3_pure-0.1.0+abc123de/PKG-INFO",
             "pyo3_pure-0.1.0+abc123de/README.md",
-            "pyo3_pure-0.1.0+abc123de/Readme.md",
             "pyo3_pure-0.1.0+abc123de/check_installed/check_installed.py",
             "pyo3_pure-0.1.0+abc123de/pyo3_pure.pyi",
             "pyo3_pure-0.1.0+abc123de/pyproject.toml",