Fixed installation failure when the executable path contains spaces for postinstall scripts and handling both list and string command formats // Resolve #5366

Author: ivankravets

HISTORY.rst

@@ -26,6 +26,7 @@ test-driven methodologies, and modern toolchains for unrivaled success.
 * Fixed a regression issue where custom build flags were not properly reflected in the `compile_commands.json <https://docs.platformio.org/en/latest/integration/compile_commands.html>`__ file, ensuring accurate compilation database generation
 * Fixed an issue where fully-qualified serial port URLs (e.g., ``rfc2217://host:port``) were incorrectly treated as wildcard patterns (`issue #5225 <https://github.com/platformio/platformio-core/issues/5225>`_)
 * Fixed an issue where the toolchain path in static analysis was not handled correctly if it contained spaces (`pull #5351 <https://github.com/platformio/platformio-core/issues/5351>`_)
+* Fixed installation failure when the executable path contains spaces for ``postinstall`` scripts and handling both list and string command formats (`pull #5366 <https://github.com/platformio/platformio-core/pull/5366>`_)
 
 6.1.18 (2025-03-11)
 ~~~~~~~~~~~~~~~~~~~

docs

@@ -330,7 +330,9 @@ def call_pkg_script(self, pkg, event):
             return
         shell = False
         if not isinstance(cmd, list):
-            shell = True
+            # issue #5366: workaround when command passed as string without spaces
+            if " " in cmd:
+                shell = True
             cmd = [cmd]
         os.environ["PIO_PYTHON_EXE"] = get_pythonexe_path()
         with fs.cd(pkg.path):