Improving travis.yml

[huguesdevimeux]

As pointed out as a suggestion in #133, we could shorten and improve travis.yml, by moving some instructions into .sh (or .bat) files.
This has already been done for the Linux jobs, see linux.sh. It is executed with

before_install:
  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then chmod +x ./.travis/osx.sh; sh ./.travis/osx.sh; fi

We should to that for both osx and windows.

[naveen521kk]

Look into https://travis-ci.com/github/ManimCommunity/manim/jobs/352635549#L46
Environmental variables are already defined by choco.
You can remove the lines at

manim/.travis.yml

Line 97 in 4b6492b

- export PATH="/c/$PYDIR:/c/$PYDIR/Scripts:$PATH"

Also, we should test 32 bit also!

[huguesdevimeux]

Feel free to submit a PR :)

[safinsingh]

@naveen521kk apparently sometimes chocolatey doesn't update the PATH on the python install, so I had to add it manually. I think we should keep it there as a safety measure

[naveen521kk]

If you check out the line I pointed above in log(https://travis-ci.com/github/ManimCommunity/manim/jobs/352635549#L46) and
https://travis-ci.com/github/ManimCommunity/manim/jobs/352635549#L51
You could understand what I meant @safinsingh

[leotrs]

@naveen521kk instead of saying things like "read this to understand what I mean", could you please kindly say here exactly what you mean? It's quite the hassle to have to read half a dozen past comments, and then navigate to another URL in order to understand what you mean. Let's try to keep the discussion here as self-contained as possible.

[eulertour]

This is now obsolete with #196.