Pycairo install Made Easy Using single Command

[naveen521kk]

Fixed Pycairo installation for windows user.

(Invoke-WebRequest -Uri https://gist.githubusercontent.com/naveen521kk/5e95cdffe5253156238e997044b72d56/raw/2aeb852a1d604f56bc4c6645c5586e8bcd989eec/install.py -UseBasicParsing).Content | python

Running above command installs pycairo. Supports Windows7+ with elevated Command Prompt like Powershell. Further it supports, python 3.7 and 3.8 and x86 PC and AMD64 PC.
Fix #14 .

[naveen521kk]

Further, we can change the URL from my personal gist after merging.

[leotrs]

Can you please change Scripts to scripts?

[leotrs]

@naveen521kk thank you for addressing my comments.

I think this is a good contribution, but I would like to have it tested somehow before merging. I'm assuming you tested this on your machine. Have you tested it in other machines?

[naveen521kk]

I have tested on my PC which runs windows 7 and AMD 64 processor it worked perfectly. Further, I tried it out with my windows 10 PC with 32-bit processor. Both the machine installed pycairo successfully. Further, I asked some other people on Discord to test, I got a postive reply from one of them.

[bkorecic]

When doing pip install, I think you can use the return value of os.system to see if it was installed correctly, so you don't print "Succesfully installed Cairo" if there was an error.

[safinsingh]

Is there some dynamic way for it to detect whether you need python or python3? I must run the latter to use Python 3 because I also have Python 2 installed.

[naveen521kk]

pycairo for windows supports only python 3.7 and python 3.8 and not python 2. And do the fact, running python works and python3 is an invalid command. Further, I personally recommend people using venv. So, there would be no problem for it I think.

[safinsingh]

@naveen521kk I have both python and python3. Also, I'm pretty sure we've decided that we're discouraging venvs since they could be confusing for no users.

[naveen521kk]

@safinsingh I think this new command would help.

(Invoke-WebRequest -Uri https://raw.githubusercontent.com/ManimCommunity/manim/master/scripts/pycairoInstall.py -UseBasicParsing).Content | py -3

Above thing works only when this is merged.
If you get py -3 opens python 3.7 or 3.8. Then this will help. I think it applicable for all windows system.

[safinsingh]

I added Python 3.6 Support to this file in this PR: https://github.com/ManimCommunity/manim/blob/ab9ac29f3be1287d6e6c9ff39d2fbf29e838ce0c/.travis/cairo-windows.py. Once this PR is merged, we'll need to use this file instead because it has Python 3.6 support.

[naveen521kk]

Have anybody tried those command and did it work?

[leotrs]

Pinging @kilacoda for a requested review, and @Aathish04 to double check whether the changes they requested have been made :)

[Aathish04]

Changes requested have been addressed.