Allowed to Import("projenv") in a library extra script // Resolve #4305

platformio/builder/tools/piolib.py

@@ -1142,6 +1142,8 @@ def ConfigureProjectLibBuilder(env):
                 _print_deps_tree(lb, level + 1)
 
     project = ProjectAsLibBuilder(env, "$PROJECT_DIR")
+    env.Export(dict(projenv=project.env))
+
     ldf_mode = LibBuilderBase.lib_ldf_mode.fget(project)  # pylint: disable=no-member
 
     click.echo("LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf")

platformio/builder/tools/platformio.py

@@ -23,7 +23,6 @@ from SCons.Node import FS  # pylint: disable=import-error
 from SCons.Script import COMMAND_LINE_TARGETS  # pylint: disable=import-error
 from SCons.Script import AlwaysBuild  # pylint: disable=import-error
 from SCons.Script import DefaultEnvironment  # pylint: disable=import-error
-from SCons.Script import Export  # pylint: disable=import-error
 from SCons.Script import SConscript  # pylint: disable=import-error
 
 from platformio import __version__, fs
@@ -180,8 +179,6 @@ def ProcessProjectDeps(env):
         )
         env.Exit(1)
 
-    Export("projenv")
-
 
 def ParseFlagsExtended(env, flags):  # pylint: disable=too-many-branches
     if not isinstance(flags, list):