Using src_filter with only one item in the list of argument causes a fatal build error on Windows

[sarfata]

• [X ] Bug report. If you’ve found a bug, please provide information below.

Configuration

Operating system: Windows 10

PlatformIO Version (platformio --version): 2.9.1

Description of problem

Using src_filter with only one item in the list of argument causes a fatal build error on Windows.

Steps to Reproduce

1. Create a new project with platform teensy, framework arduino, board teensy31.
2. Create a sub-folder folder1 with one simple main.cpp in it
3. Edit the platformio.ini file and add src_filter = +<folder1/>

Actual Results

C:\Users\thomas\Documents\GitHub\test> platformio run
[05/08/16 20:18:44] Processing mybaseenv (platform: teensy, src_filter: +<folder1/>, f
ramework: arduino, board: teensy31)
-------------------------------------------------------------------------------------
The system cannot find the file specified.
============================ [ ERROR ] Took 0.03 seconds ============================

With -v the results are slightly different:

C:\Users\thomas\Documents\GitHub\test> platformio run -v
[05/08/16 20:18:49] Processing mybaseenv (platform: teensy, src_filter: +<folder1/>, f
ramework: arduino, board: teensy31)
-------------------------------------------------------------------------------------
.
============================ [ ERROR ] Took 0.03 seconds ============================

Expected Results

Project should build without error on Windows, as it does on Travis.

If problems with PlatformIO Build System:

See also full project here: https://github.com/sarfata/platformio-bug-srcfilter

The content of platformio.ini:

[env:mybaseenv]
platform = teensy
framework = arduino
board = teensy31
# will not work with platformio 2.9.1
src_filter = +<folder1/>

Source file to reproduce issue:

#include <Arduino.h>

void setup() {
  Serial.begin(115200);
}

void loop() {
  Serial.println("looping...");
  delay(1000);
}

Additional info

• Just adding some text at the end of the line (for example a comment or a folder that does not exist) is enough to workaround the issue.
• Tested under Linux and the error does not happen there. See travis build report.
• Tested in the command line and in Atom with same results.

[ivankravets]

Thanks a lot for the detailed report! 👍

The bug is linked with SCons command parser. I'll think how to fix it.

[sarfata]

👍 Thanks for the quick fix!