Resolved an issue with "pio pkg exec" command on WIndows while executing Python scripts from a package

platformio/package/commands/exec.py

@@ -20,7 +20,7 @@ import click
 from platformio.compat import IS_MACOS, IS_WINDOWS
 from platformio.exception import ReturnErrorCode, UserSideException
 from platformio.package.manager.tool import ToolPackageManager
-from platformio.proc import get_pythonexe_path
+from platformio.proc import get_pythonexe_path, where_is_program
 
 
 @click.command("exec", short_help="Run command from package tool")
@@ -52,9 +52,13 @@ def package_exec_cmd(obj, package, call, args):
 
     inject_pkg_to_environ(pkg)
     os.environ["PIO_PYTHON_EXE"] = get_pythonexe_path()
+
     # inject current python interpreter on Windows
-    if IS_WINDOWS and args and args[0].endswith(".py"):
+    if args[0].endswith(".py"):
         args = [os.environ["PIO_PYTHON_EXE"]] + list(args)
+        if not os.path.exists(args[1]):
+            args[1] = where_is_program(args[1])
+
     result = None
     try:
         run_options = dict(shell=call is not None, env=os.environ)

platformio/proc.py

@@ -185,10 +185,17 @@ def copy_pythonpath_to_osenv():
 
 
 def where_is_program(program, envpath=None):
-    env = os.environ
+    env = os.environ.copy()
     if envpath:
         env["PATH"] = envpath
 
+    # look up in $PATH
+    for bin_dir in env.get("PATH", "").split(os.pathsep):
+        if os.path.isfile(os.path.join(bin_dir, program)):
+            return os.path.join(bin_dir, program)
+        if IS_WINDOWS and os.path.isfile(os.path.join(bin_dir, "%s.exe" % program)):
+            return os.path.join(bin_dir, "%s.exe" % program)
+
     # try OS's built-in commands
     try:
         result = exec_command(["where" if IS_WINDOWS else "which", program], env=env)
@@ -197,13 +204,6 @@ def where_is_program(program, envpath=None):
     except OSError:
         pass
 
-    # look up in $PATH
-    for bin_dir in env.get("PATH", "").split(os.pathsep):
-        if os.path.isfile(os.path.join(bin_dir, program)):
-            return os.path.join(bin_dir, program)
-        if os.path.isfile(os.path.join(bin_dir, "%s.exe" % program)):
-            return os.path.join(bin_dir, "%s.exe" % program)
-
     return program