PlatformIO Core does not work on msys 2

[Haringat]

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  If you’ve found a bug, please provide an information below.

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---

Configuration

Operating system: Windows

PlatformIO Version (platformio --version): probably latest since just installed via pip ("platformio --version" does not work for reasons below)

Description of problem

Platformio is not usable on msys2. It shows the same error output regardless of what you pass in:

Steps to Reproduce

1. Install msys2
2. Install python and pip inside msys
3. Install platformio using pip
4. Run platformio
5. Watch the fireworks

Actual Results

$ platformio -h
don't know how to enumerate ttys on this system.
! I you know how the serial ports are named send this information to
! the author of this module:

sys.platform = 'msys'
os.name = 'posix'
pySerial version = 3.5

also add the naming scheme of the serial ports and with a bit luck you can get
this module running...
Usage: platformio [OPTIONS] COMMAND [ARGS]...
Try 'platformio -h' for help.

Error: No such command "ci"

Expected Results

usage

If problems with PlatformIO Build System:

The content of platformio.ini:
irrelevant

Source file to reproduce issue:
irrelevant

Additional info

[ustsv]

After patch click it work. Use in MSYS2 w/o termios available.
And platformio/builder/tools/piomaxlen.py need restore version @5.0.4. In version 5.1.0, 5.2.0 fails:
Using tempfile C:/tmp/Marlin/.pio/build/morpheus_ustsv/tmpthqhsc3m.tmp for command line:<skip...>Invalid switch - "tmp".

UPD: linking work with

index c7360418..62116446 100644
--- "a/C:\\msys2\\mingw64\\lib\\python3.9\\site-packages\\platformio\\builder\\tools\\piomaxlen.py@5.2.0"
+++ "b/C:\\msys2\\mingw64\\lib\\python3.9\\site-packages\\platformio\\builder\\tools\\piomaxlen.py"
@@ -90,6 +90,11 @@ def generate(env):
     kwargs["ARCOM"] = env.get("ARCOM", "").replace(
         "$SOURCES", "${_long_sources_hook(__env__, SOURCES)}"
     )
+
+    kwargs["LINKCOM"] = env.get("LINKCOM", "").replace(
+        "$SOURCES", "${_long_sources_hook(__env__, SOURCES)}"
+    )
+
     env.Replace(**kwargs)
 
     return env

[ivankravets]

Why did you close this PR pallets/click#1666 ?

[ustsv]

They said that the problem is in implementing MSYS2. Not their problem.