fixing local flow with python requires

conans/client/conan_api.py

@@ -400,6 +400,8 @@ def export_pkg(self, conanfile_path, name, channel, source_folder=None, build_fo
                    package_folder=None, install_folder=None, profile_names=None, settings=None,
                    options=None, env=None, force=False, user=None, version=None, cwd=None):
 
+        remotes = self._cache.registry.load_remotes()
+        self.python_requires.enable_remotes(remotes=remotes)
         settings = settings or []
         options = options or []
         env = env or []
@@ -675,6 +677,8 @@ def build(self, conanfile_path, source_folder=None, package_folder=None, build_f
               install_folder=None, should_configure=True, should_build=True, should_install=True,
               should_test=True, cwd=None):
 
+        remotes = self._cache.registry.load_remotes()
+        self.python_requires.enable_remotes(remotes=remotes)
         cwd = cwd or get_cwd()
         conanfile_path = _get_conanfile_path(conanfile_path, cwd, py=True)
         build_folder = _make_abs_path(build_folder, cwd)
@@ -691,6 +695,9 @@ def build(self, conanfile_path, source_folder=None, package_folder=None, build_f
     @api_method
     def package(self, path, build_folder, package_folder, source_folder=None, install_folder=None,
                 cwd=None):
+        remotes = self._cache.registry.load_remotes()
+        self.python_requires.enable_remotes(remotes=remotes)
+
         cwd = cwd or get_cwd()
         conanfile_path = _get_conanfile_path(path, cwd, py=True)
         build_folder = _make_abs_path(build_folder, cwd)
@@ -711,6 +718,9 @@ def package(self, path, build_folder, package_folder, source_folder=None, instal
 
     @api_method
     def source(self, path, source_folder=None, info_folder=None, cwd=None):
+        remotes = self._cache.registry.load_remotes()
+        self.python_requires.enable_remotes(remotes=remotes)
+
         cwd = cwd or get_cwd()
         conanfile_path = _get_conanfile_path(path, cwd, py=True)
         source_folder = _make_abs_path(source_folder, cwd)

conans/test/functional/python_requires/python_requires_test.py

@@ -8,6 +8,7 @@
 from conans.paths import CONANFILE
 from conans.test.utils.tools import TestClient, TestServer, \
     NO_SETTINGS_PACKAGE_ID, create_local_git_repo
+from conans.test.utils.conanfile import TestConanFile
 
 
 class PythonExtendTest(unittest.TestCase):
@@ -605,3 +606,28 @@ def build(self):
         #   - no mention to alias
         self.assertNotIn("alias", client.out)
         self.assertNotIn("alias2", client.out)
+
+    def local_build_test(self):
+        client = TestClient()
+        client.save({"conanfile.py": "var=42\n"+str(TestConanFile("Tool", "0.1"))})
+        client.run("export . Tool/0.1@user/channel")
+
+        conanfile = """from conans import ConanFile, python_requires
+pkg1 = python_requires("Tool/0.1@user/channel")
+class MyConanfileBase(ConanFile):
+    def source(self):
+        self.output.info("Pkg1 source: %s" % pkg1.var)
+    def build(self):
+        self.output.info("Pkg1 build: %s" % pkg1.var)
+    def package(self):
+        self.output.info("Pkg1 package: %s" % pkg1.var)
+"""
+        client.save({"conanfile.py": conanfile})
+        client.run("source .")
+        self.assertIn("conanfile.py: Pkg1 source: 42", client.out)
+        client.run("install .")
+        client.run("build .")
+        self.assertIn("conanfile.py: Pkg1 build: 42", client.out)
+        client.run("package .")
+        self.assertIn("conanfile.py: Pkg1 package: 42", client.out)
+        client.run("export-pkg . pkg1/0.1@user/testing")