Only set public visibility to direct dependencies

This resolves issue #38.

Author: Misharmis

src/bin/generate_pip_repositories.py

@@ -179,24 +179,26 @@ def _generate_package_for_requirement(
         write_file(repos_file_path, repos_file_content)
 
     def _generate_build_file_content(self, build_rules):
-        return textwrap.dedent("""
-            package(default_visibility = ["//visibility:public"])
-
-            {rules}
-        """).strip().format(
-            rules="\n".join(build_rules),
-        )
+        return textwrap.dedent("\n".join(build_rules))
 
     def _generate_rules_for_requirement(self, requirement_name, python_subtree):
         top_alias = SelectAlias(requirement_name)
 
+        # We want to make the top alias "visible" only if the package is specified
+        # in the requirements.txt file (i.e. has `is_direct=True` field in the lock
+        # file). Since there's an `is_direct` key for each python_version/platform,
+        # we're going to set the visibility  to public if any of those is True.
+        visibility = "//:__subpackages__"
+
         for python_version, platform_subtree in python_subtree.items():
             for platform, requirement_details in platform_subtree.items():
                 yield self._generate_py_library(
                     requirement_details,
                     python_version,
                     platform,
                 )
+                if requirement_details["is_direct"]:
+                    visibility = "//visibility:public"
 
             version_alias = self._generate_python_version_alias(
                 python_version,
@@ -208,6 +210,7 @@ def _generate_rules_for_requirement(self, requirement_name, python_subtree):
             python_version_label = _make_python_version_label(python_version)
             top_alias.actual[python_version_label] = version_alias.name
 
+        top_alias.visibility = visibility
         yield str(top_alias)
 
     def _generate_py_library(self, requirement_details, python_version, platform):
@@ -331,16 +334,19 @@ class SelectAlias(object):
     def __init__(self, name):
         self.name = name
         self.actual = {}
+        self.visibility = "//visibility:private"
 
     def __str__(self):
         return textwrap.dedent("""
             alias(
                 name = "{name}",
                 actual = select({actual}),
+                visibility = ["{visibility}"],
             )
         """).strip().format(
             name=self.name,
             actual=self.actual,
+            visibility=self.visibility,
         )
 
 

test/BUILD

@@ -59,6 +59,32 @@ py_test(
     tags = ["new"],
 )
 
+py_test(
+    name = "visibility_test",
+    srcs = ["visibility_test.py"],
+    data = [
+        ":visibility_test_pytest_six",
+        ":visibility_test_lib_six",
+    ],
+)
+
+genquery(
+    name = "visibility_test_pytest_six",
+    expression = "visible('@pip//pytest', '@pip//six')",
+    scope = ["@pip//pytest"],
+)
+
+py_library(
+    name = "visibility_test_library",
+    deps = ["@pip//pytest"],
+)
+
+genquery(
+    name = "visibility_test_lib_six",
+    expression = "visible('//test:visibility_test_library', '@pip//six')",
+    scope = [":visibility_test_library"],
+)
+
 genrule(
     name = "pyang-main",
     srcs = [pyang_repo + "//scripts:pyang"],

test/visibility_test.py

@@ -0,0 +1,6 @@
+with open("./test/visibility_test_pytest_six") as f:
+    assert f.read().strip() == "@pip//six:six"
+
+with open("./test/visibility_test_lib_six") as f:
+    assert not f.read().strip()
+

thirdparty/pip/requirements-lock.json

@@ -160,7 +160,7 @@
         "lxml": {
           "dependencies": [],
           "extras": [],
-          "is_direct": false,
+          "is_direct": true,
           "source": "lxml_4_3_3_cp27_cp27m_macosx_10_6_intel_macosx_10_9_intel_macosx_10_9_x86_64_macosx_10_10_intel_macosx_10_10_x86_64",
           "version": "4.3.3"
         },
@@ -477,7 +477,7 @@
         "lxml": {
           "dependencies": [],
           "extras": [],
-          "is_direct": false,
+          "is_direct": true,
           "source": "lxml_4_3_3_cp37_cp37m_macosx_10_6_intel_macosx_10_9_intel_macosx_10_9_x86_64_macosx_10_10_intel_macosx_10_10_x86_64",
           "version": "4.3.3"
         },
@@ -795,7 +795,7 @@
         "lxml": {
           "dependencies": [],
           "extras": [],
-          "is_direct": false,
+          "is_direct": true,
           "source": "lxml_4_3_3_cp27_cp27mu_manylinux1_x86_64",
           "version": "4.3.3"
         },
@@ -1112,7 +1112,7 @@
         "lxml": {
           "dependencies": [],
           "extras": [],
-          "is_direct": false,
+          "is_direct": true,
           "source": "lxml_4_3_3_cp36_cp36m_manylinux1_x86_64",
           "version": "4.3.3"
         },

thirdparty/pip/requirements.in

@@ -1,5 +1,6 @@
 google-cloud-logging
 isort[pyproject]
+lxml
 pathlib2 ; python_version < "3.0"
 pyang
 pytest