python 3.x breaks grunt serve

[craigryan]

Following the default jhipster setup, grunt serve fails with a python version error because of browser sync. I have python 3.x installed (Win 8.1).

Since jhipster indirectly depends on the python version installed I think it would be useful to mention in the installation doc to have python 2.x on PATH

[deepu105]

Yes i noticed this too but i wasnt using browser sync so didnt know it was breaking stuff

[atomfrede]

I have python 3.4.3 on PATH (Linux) and grunt serve works just fine.

[jdubois]

I have Python 2.x installed (default install with Homebrew on Mac), and I don't have any issue. I'm not really aware on any issue, but if this is linked to Grunt or BrowserSync can you link to the issue on those projects? I would be very surprised that one of them as an issue with Python, but I haven't looked at them very deeply.

[craigryan]

This only happens with a fresh project for me (no node_modules), after the
first build I guess python isn't called so any version can be installed.
The error I get (below) is fairly clear, browser sync build requires < 3.x
python which they'd probably point out if I logged an issue against it.
Up to you if you want to mention the indirect python 2.x dep in your docs,
for the sake of a better JH newbie experience.

The error:

...grunt-browser-sync\node_modules
browser-sync\node_modules\socket.io
\node_modules\socket.io-client\node_modules\e
ngine.io-client\node_modules\ws\node_modules\utf-8-validate>if not defined
npm_c
onfig_node_gyp
gyp ERR! stack Error: Python executable "python" is v3.4.3, which is not
support
ed by gyp.
gyp ERR! stack You can pass the --python switch to point to Python >=
v2.5.0 & <
3.0.0.
gyp ERR! stack at failPythonVersion
(D:\packages\nodejs\node_modules\npm\nod
e_modules\node-gyp\lib\configure.js:119:14)
...
gyp ERR! node -v v0.12.7
gyp ERR! node-gyp -v v2.0.1

On Mon, Aug 24, 2015 at 2:03 AM, Julien Dubois [email protected]
wrote:

I have Python 2.x installed (default install with Homebrew on Mac), and I
don't have any issue. I'm not really aware on any issue, but if this is
linked to Grunt or BrowserSync can you link to the issue on those projects?
I would be very surprised that one of them as an issue with Python, but I
haven't looked at them very deeply.

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[gmarziou]

Well known and very old gyp issue and as a consequence node-gyp does not support Python 3 either, even NodeJS requires gyp to build.

It's difficult to document it clearly and there's no simple solution if a user really needs Pyhton 3.x.
How many other issues depending on user's environment should we document if we start documenting this one? I'd be in favor of not documenting it.

[jdubois]

If it's a node.js requirement we don't have to do anything: it's quite explicit that we rely on Node.js, and that it should be correctly installed.