[tools] Fixing project.py -S printing problem

[bridadan]

Description

Printing too large of a string can fail in Windows, as detailed here: https://bugs.python.org/issue11395. This works around the problem by adding a print_large_string function that breaks up the string into smaller pieces before printing it.

Status

READY

Migrations

If this PR changes any APIs or behaviors, give a short description of what API users should do when this PR is merged.

NO

Todos

• Review by @theotherjimmy
• Review by @0xc0170

Steps to test or reproduce

Before this change, mbed export -S would fail with the following traceback:

Traceback (most recent call last):
  File "C:\Users\bridan01\Documents\dev\m_mbed\mbed\tools\project.py", line 244, in <module>
    main()
  File "C:\Users\bridan01\Documents\dev\m_mbed\mbed\tools\project.py", line 192, in main
    print mcu_ide_matrix()
IOError: [Errno 12] Not enough space
[mbed] ERROR: "python" returned error code 1.
[mbed] ERROR: Command "python -u C:\Users\bridan01\Documents\dev\m_mbed\mbed\tools\project.py -S" in "C:\Users\bridan01\Documents\dev\m_mbed\mbed"

[0xc0170]

@bridadan any CI? I dont think mbed export S is covered.

[sg-]

resolves https://github.com/ARMmbed/oob-mbed-os-example-blinky/issues/26

[bridadan]

@0xc0170 Nope, no CI coverage for this.

[bridadan]

Unless I should add a line in travis to check this? Seems a bit funny I could still do it :)

[bridadan]

I've added the Travis CI check, when that comes back this PR should be good to go.

[0xc0170]

Travis failed, I could locate one failure:

0.16s$ python tools/project.py -S

Traceback (most recent call last):

  File "tools/project.py", line 14, in <module>

    from tools.export import EXPORTERS, mcu_ide_matrix

  File "/home/travis/build/ARMmbed/mbed-os/tools/export/__init__.py", line 18, in <module>

    from tools.export import codered, ds5_5, iar, makefile

  File "/home/travis/build/ARMmbed/mbed-os/tools/export/iar/__init__.py", line 12, in <module>

    from tools.export.cmsis import DeviceCMSIS

  File "/home/travis/build/ARMmbed/mbed-os/tools/export/cmsis/__init__.py", line 9, in <module>

    from tools.arm_pack_manager import Cache

  File "/home/travis/build/ARMmbed/mbed-os/tools/arm_pack_manager/__init__.py", line 2, in <module>

    from bs4 import BeautifulSoup

ImportError: No module named bs4

[bridadan]

@0xc0170 Travis is happy again! I had to install the requirements.txt in the Travis config.

[theotherjimmy]

Adding it to Travis dose nothing for us as Travis runs Linux.

[bridadan]

@theotherjimmy duh, totally forgot about that. Oh well!