Build failed with Python error related to the print function.

[djalbat]

• Node version: 12.1.0
• nvm version: 0.33.0
• OS version: Darwin James 18.7.0 Darwin Kernel Version 18.7.0: Sat Oct 12 00:02:19 PDT 2019; root:xnu-4903.278.12~1/RELEASE_X86_64 x86_64
• Compiler version:

Apple clang version 11.0.0 (clang-1100.0.33.17)
Target: x86_64-apple-darwin18.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Hi!

When I try to install a package via npm I get the following error:

james.smith:~/Public/formalmethods.co.uk$ i --save necessary@latest

> fsevents@1.2.11 install /Users/james.smith/Public/formalmethods.co.uk/node_modules/fsevents
> node-gyp rebuild

gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp ERR! configure error 
gyp ERR! stack Error: Command failed: /usr/local/bin/python -c import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack   File "<string>", line 1
gyp ERR! stack     import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack                                ^
gyp ERR! stack SyntaxError: invalid syntax
gyp ERR! stack 
gyp ERR! stack     at ChildProcess.exithandler (child_process.js:304:12)
gyp ERR! stack     at ChildProcess.emit (events.js:196:13)
gyp ERR! stack     at maybeClose (internal/child_process.js:1000:16)
gyp ERR! stack     at Socket.<anonymous> (internal/child_process.js:405:11)
gyp ERR! stack     at Socket.emit (events.js:196:13)
gyp ERR! stack     at Pipe.<anonymous> (net.js:586:12)
gyp ERR! System Darwin 18.7.0
gyp ERR! command "/Users/james.smith/.nvm/versions/node/v12.1.0/bin/node" "/Users/james.smith/.nvm/versions/node/v12.1.0/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/james.smith/Public/formalmethods.co.uk/node_modules/fsevents
gyp ERR! node -v v12.1.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok 
npm WARN formalmethods.co.uk No description
npm WARN formalmethods.co.uk No repository field.
npm WARN formalmethods.co.uk No license field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 (node_modules/fsevents):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.11 install: `node-gyp rebuild`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1

+ necessary@3.6.3
updated 1 package and audited 6389 packages in 2.504s
found 1 low severity vulnerability
  run `npm audit fix` to fix them, or `npm audit` for details

This has nothing to do with the particular package, it happens whatever I try to install via npm.

This has something to do with the Python, the errror is because there are no brackets around the print arguments, right? The Python version in the path is 3.7.4, so perhaps Python 2 should be installed in the path?

Any help would be appreciated. I have googled for this one, but can find nothing relevant.

Regards,
James

[cclauss]

gyp ERR! node-gyp -v v3.8.0

This Python 3 syntax error is fixed in node-gyp v5.x and v6.x.

If you still have legacy Python on your machine then a quick fix would be:
NODE_GYP_FORCE_PYTHON=python2 node-gyp rebuild

[djalbat]

Thanks and apologies for the tardy response. Funnily enough I now can't replicate this, but I have installed the latest node-gyp anyway.