Publish to pypi with poetry.

Resolve #14.

README.md

@@ -1,10 +1,10 @@
 A command-line utility for pulling code blocks out of markdown files.
 
 ```sh
-$ pip install -e git+https://github.com/ryneeverett/mkcodes.git#egg=mkcodes
+$ pip install mkcodes
 
 # For traditional markdown code-block support.
-$ pip install markdown
+$ pip install mkcodes[markdown]
 
 $ mkcodes --help
 Usage: mkcodes [OPTIONS] INPUTS...
@@ -33,6 +33,5 @@ Running Tests
 -------------
 
 ```sh
-python setup.py develop
 ./test
 ```

pyproject.toml

@@ -0,0 +1,25 @@
+[tool.poetry]
+name = "mkcodes"
+version = "0.1.0"
+description = "A command-line utility for pulling code blocks out of markdown files."
+authors = ["ryneeverett <[email protected]>"]
+license = "Apache-2.0"
+
+[tool.poetry.dependencies]
+python = "^3.8"
+click = "*"
+
+Markdown = { version = "*", optional = true }
+
+[tool.poetry.extras]
+markdown = ["Markdown"]
+
+[tool.poetry.dev-dependencies]
+Markdown = "*"
+
+[tool.poetry.scripts]
+"mkcodes" = "mkcodes:main"
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"

shell.nix

@@ -1,22 +1,15 @@
+with import <nixpkgs> {};
 let
-  pkgs = import <nixpkgs> {};
-  testDependencies = [
-    pkgs.python3Packages.setuptools
-    pkgs.python3Packages.markdown
-  ];
-  mkcodes = pkgs.python3Packages.buildPythonPackage {
-    pname = "mkcodes";
-    version = "master";
-    src = ./.;
-
-    propagatedBuildInputs = [
-      pkgs.python3Packages.click
-    ];
-    checkInputs = testDependencies;
+  mkcodesEnv = poetry2nix.mkPoetryEnv {
+    projectDir = ./.;
+    # editablePackageSources = {
+      # mkcodes = ./mkcodes;
+    # };
   };
 in
   pkgs.mkShell {
     buildInputs = [
-      mkcodes
-    ] ++ testDependencies;
+      pkgs.poetry
+      mkcodesEnv
+    ];
   }