Support for more packages without build scripts.

Author: Maxwell175

Lib/__np__/common.py

@@ -227,12 +227,17 @@ def run_with_output(*args, **kwargs):
     quiet = kwargs.pop("quiet", False)
     assert not kwargs
 
+    env = os.environ.copy()
+    # Don't use the pip path customization here. Just replicate our current path.
+    env["PYTHONPATH"] = os.pathsep.join([x for x in sys.path if not x.endswith(os.path.sep + "site")])
+
     p = subprocess.Popen(
         args,
         universal_newlines=True,
         stdin=stdin,
         stdout=subprocess.PIPE,
         stderr=subprocess.STDOUT,
+        env=env,
     )
 
     output = ""

Lib/__np__/packaging.py

@@ -240,7 +240,7 @@ def get_extra_sources_for_package(package_name):
             )
     return package_sources
 
-def find_build_script_for_package(package_name, version):
+def find_build_script_for_package(package_name, version=None):
     try:
         package_index = getPackageJson("packages", package_name)
     except __np__.NoSuchURL:
@@ -249,10 +249,10 @@ def find_build_script_for_package(package_name, version):
     matched_source = None
     for source in package_index["scripts"]:
         matched_metadata = True
-        if "metadata" in source and "Version" in source["metadata"]:
+        if version is not None and "metadata" in source and "Version" in source["metadata"]:
             matched_metadata = fnmatch.fnmatch(version, source["metadata"]["Version"])
 
-        if matched_metadata:
+        if matched_metadata or version is None:
             matched_source = source
             break
 

Lib/pip.py

@@ -69,8 +69,13 @@ def our_load_pyproject_toml(use_pep517, pyproject_toml, setup_py, req_name):
 
     # We will be taking over the build process.
     if os.path.isfile(os.path.join(os.path.dirname(os.path.dirname(pyproject_toml)), "script.json")):
+        with open(os.path.join(os.path.dirname(os.path.dirname(pyproject_toml)), "script.json"), 'r') as f:
+            data = json.load(f)
+        requires = []
+        if 'requires' in data['script_metadata']:
+            requires = data['script_metadata']['requires']
         return pip._internal.pyproject.BuildSystemDetails(
-            [], "__np__.metabuild:managed_build", [], [os.path.dirname(__file__), real_pip_dir])
+            requires, "__np__.metabuild:managed_build", [], [os.path.dirname(__file__), real_pip_dir])
 
     result = load_pyproject_toml_orig(use_pep517, pyproject_toml, setup_py, req_name)
     if result is None:
@@ -132,6 +137,12 @@ def find_all_candidates(self, project_name):
 
         base_candidates = _PackageFinder.find_all_candidates(self, project_name)
 
+        build_script = __np__.packaging.find_build_script_for_package(project_name)
+
+        if build_script:
+            # If we have a build script, filter out wheels.
+            base_candidates = [x for x in base_candidates if not x.link.is_wheel]
+
         return __np__.packaging.get_extra_sources_for_package(project_name) + base_candidates