pip: Add support for pyproject.toml

pip/flatpak-pip-generator

@@ -28,6 +28,8 @@ parser.add_argument('--cleanup', choices=['scripts', 'all'],
                     help='Select what to clean up after build')
 parser.add_argument('--requirements-file', '-r',
                     help='Specify requirements.txt file')
+parser.add_argument('--pyproject-file',
+                    help='Specify pyproject.toml file')
 parser.add_argument('--build-only', action='store_const',
                     dest='cleanup', const='all',
                     help='Clean up all files after build')
@@ -48,6 +50,15 @@ parser.add_argument('--yaml', action='store_true',
                     help='Use YAML as output format instead of JSON')
 opts = parser.parse_args()
 
+if opts.pyproject_file:
+    try:
+        from tomllib import load as toml_load
+    except ModuleNotFoundError:
+        try:
+            from tomli import load as toml_load
+        except ModuleNotFoundError:
+            exit('tomli modules is not installed. Run "pip install tomli"')
+
 if opts.yaml:
     try:
         import yaml
@@ -158,6 +169,16 @@ if opts.requirements_file:
     except FileNotFoundError:
         pass
 
+elif opts.pyproject_file:
+    pyproject_file = os.path.expanduser(opts.pyproject_file)
+    with open(pyproject_file, "rb") as f:
+        pyproject_data = toml_load(f)
+    dependencies =  pyproject_data.get("project", {}).get("dependencies", [])
+    packages = list(requirements.parse('\n'.join(dependencies)))
+    with tempfile.NamedTemporaryFile('w', delete=False, prefix='requirements.') as req_file:
+        req_file.write('\n'.join(dependencies))
+        requirements_file = req_file.name
+
 elif opts.packages:
     packages = list(requirements.parse('\n'.join(opts.packages)))
     with tempfile.NamedTemporaryFile('w', delete=False, prefix='requirements.') as req_file: