Install mdgen fails on OSX high sierra

[Yaojian]

I tried to install mdgen using

sudo npm install -g mdgen

and got the following error

/usr/local/bin/mdgen -> /usr/local/lib/node_modules/mdgen/bin/mdgen.js
/usr/local/bin/mdgen-image -> /usr/local/lib/node_modules/mdgen/bin/mdgen-image.js
/usr/local/bin/mdgen-render -> /usr/local/lib/node_modules/mdgen/bin/mdgen-render.js
/usr/local/bin/mdgen-pdf -> /usr/local/lib/node_modules/mdgen/bin/mdgen-pdf.js
/usr/local/bin/mdgen-html -> /usr/local/lib/node_modules/mdgen/bin/mdgen-html.js

> canvas@1.3.12 install /usr/local/lib/node_modules/mdgen/node_modules/canvas
> node-gyp rebuild

gyp ERR! configure error 
gyp ERR! stack Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/mdgen/node_modules/canvas/build'
gyp ERR! System Darwin 17.0.0
gyp ERR! command "/usr/local/Cellar/node/8.7.0/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /usr/local/lib/node_modules/mdgen/node_modules/canvas
gyp ERR! node -v v8.7.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok 
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! canvas@1.3.12 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the canvas@1.3.12 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/yaojian/.npm/_logs/2017-10-20T09_51_49_587Z-debug.log

The permission of /usr/local/lib/node_modules is:

 drwxr-xr-x    4 yaojian  admin   128 Oct 20 17:51 node_modules

any help ?

[krtzer]

I got a similar error on windows 10, did you ever find a workaround/root cause?

[krtzer]

After looking into it more, I think this is because I do not have my dependencies setup correctly on Windows. Canvas Install Instructions. I will look at this later today and see if I can resolve the issue by reading the manual :) .

[krtzer]

I was not able to get this to work on my Windows system and have no work around. I did some searching around for other issues with this and it seems like it is likely due to some setup issue with canvas and the OS. At this point, I need to move on with my project.