ImportError: No module named gyp on Cygwin/Windows

[joquijada]

Keep getting below error when I run npm install --verbose to install my Node.js application, which is indirectly using node-gyp to compile re2 module. I've followed guidelines here

• Python Version (please note I installed via Cygwin setup.exe):

$ /cygdrive/c/Python27/python.exe --version
Python 2.7.16

• Node Version:

node -v
v11.9.0

 npm -v
6.9.0

• Platform: Cygwin on Microsoft Windows 10 Enterprise

uname -a
CYGWIN_NT-10.0 TNJ10038LKVTJKF 3.0.7(0.338/5/3) 2019-04-30 18:08 x86_64 Cygwin

• Compiler: Using Microsoft Visual Studio 2017 Professional with Desktop development with C++" workload
• Module: It's failing when my app is trying to node-gyp compile re2 module

Verbose output from `npm install --verbose` command:

npm info it worked if it ends with ok
npm verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
npm verb cli   'C:\\Users\\<myId>\\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js',
npm verb cli   'install',
npm verb cli   '--verbose' ]
npm info using npm@6.9.0
npm info using node@v11.9.0
npm verb npm-session 7378279f82bfc9e2
npm info lifecycle @data-leakage-protection/git-repo-inspector@1.1.0~preinstall: @data-leakage-protection/git-repo-inspector@1.1.0
npm timing stage:loadCurrentTree Completed in 6279ms
npm timing stage:loadIdealTree:cloneCurrentTree Completed in 40ms
npm timing stage:loadIdealTree:loadShrinkwrap Completed in 974ms
npm http fetch GET 200 https://registry.npmjs.org/@data-leakage-protection%2fsignatures 1287ms
npm http fetch GET 200 https://registry.npmjs.org/fs-extra 341ms
npm http fetch GET 200 https://registry.npmjs.org/re2 822ms
npm http fetch GET 200 https://registry.npmjs.org/fsevents 354ms
npm http fetch GET 200 https://registry.npmjs.org/fsevents/-/fsevents-1.2.9.tgz 950ms
npm timing stage:loadIdealTree:loadAllDepsIntoIdealTree Completed in 7464ms
npm timing stage:loadIdealTree Completed in 9344ms
npm timing stage:generateActionsToTake Completed in 282ms
npm verb correctMkdir C:\Users\<myId>\\AppData\Roaming\npm-cache\_locks correctMkdir not in flight; initializing
npm verb lock using C:\Users\<myId>\\AppData\Roaming\npm-cache\_locks\staging-4c24b48be61e8043.lock for C:\git\ecom\git-repo-inspector\node_modules\.staging
npm http fetch GET 200 https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz 332ms
npm http fetch GET 200 https://registry.npmjs.org/re2/-/re2-1.8.4.tgz 651ms
npm http fetch GET 200 https://registry.npmjs.org/@data-leakage-protection/signatures/-/signatures-1.1.1.tgz 934ms
npm timing action:extract Completed in 1512ms
npm info lifecycle undefined~preuninstall: undefined
npm info lifecycle undefined~uninstall: undefined
npm info lifecycle undefined~preuninstall: undefined
npm info lifecycle undefined~uninstall: undefined
npm info lifecycle undefined~preuninstall: undefined
npm info lifecycle undefined~uninstall: undefined
npm info lifecycle undefined~preuninstall: undefined
npm info lifecycle undefined~uninstall: undefined
npm timing action:unbuild Completed in 7ms
npm timing action:remove Completed in 1ms
npm timing action:finalize Completed in 428ms
npm timing audit submit Completed in 2097ms
npm http fetch POST 200 https://registry.npmjs.org/-/npm/v1/security/audits/quick 2098ms
npm timing audit body Completed in 5ms
npm timing action:refresh-package-json Completed in 418ms
npm info lifecycle fs-extra@7.0.1~preinstall: fs-extra@7.0.1
npm info lifecycle re2@1.8.4~preinstall: re2@1.8.4
npm info lifecycle @data-leakage-protection/signatures@1.1.1~preinstall: @data-leakage-protection/signatures@1.1.1
npm timing action:preinstall Completed in 1ms
npm info linkStuff fs-extra@7.0.1
npm info linkStuff re2@1.8.4
npm info linkStuff @data-leakage-protection/signatures@1.1.1
npm timing action:build Completed in 3ms
npm info lifecycle fs-extra@7.0.1~install: fs-extra@7.0.1
npm info lifecycle re2@1.8.4~install: re2@1.8.4

> re2@1.8.4 install C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2
> node-gyp rebuild


C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2>if not defined npm_config_node_gyp (node "C:\Users\<myId>\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js" rebuild )  else (node "c:\Users\<myId>\AppData\Roaming\npm\node_modules\node-gyp\bin\node-gyp.js" rebuild ) 
gyp info it worked if it ends with ok
gyp verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
gyp verb cli   'c:\\Users\\<myId>\\AppData\\Roaming\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js',
gyp verb cli   'rebuild' ]
gyp info using node-gyp@3.8.0
gyp info using node@11.9.0 | win32 | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "c:\Python27\python.exe" in the PATH
gyp verb `which` succeeded c:\Python27\python.exe c:\Python27\python.exe
gyp verb check python version `c:\Python27\python.exe -c "import sys; print "2.7.16
gyp verb check python version .%s.%s" % sys.version_info[:3];"` returned: %j
gyp verb get node dir no --target version specified, falling back to host node version: 11.9.0
gyp verb command install [ '11.9.0' ]
gyp verb install input version string "11.9.0"
gyp verb install installing version: 11.9.0
gyp verb install --ensure was passed, so won't reinstall if already installed
gyp verb install version is already installed, need to check "installVersion"
gyp verb got "installVersion" 9
gyp verb needs "installVersion" 9
gyp verb install version is good
gyp verb get node dir target node version installed: 11.9.0
gyp verb build dir attempting to create "build" dir: C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2\build
gyp verb build dir "build" dir needed to be created? C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2\build
gyp verb find vs2017 Found installation at: C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional
gyp verb find vs2017   - Found Microsoft.VisualStudio.Component.Windows10SDK.17134
gyp verb find vs2017   - Found Microsoft.VisualStudio.Component.VC.Tools.x86.x64
gyp verb find vs2017   - Found Microsoft.VisualStudio.VC.MSBuild.Base
gyp verb find vs2017   - Using this installation with Windows 10 SDK
gyp verb find vs2017 using installation: C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional
gyp verb build/config.gypi creating config file
gyp verb build/config.gypi writing out config file: C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2\build\config.gypi
gyp verb config.gypi checking for gypi file: C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2\config.gypi
gyp verb common.gypi checking for gypi file: C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2\common.gypi
gyp verb gyp gyp format was not specified; forcing "msvs"
gyp info spawn c:\Python27\python.exe
gyp info spawn args [ 'c:\\Users\\<myId>\\AppData\\Roaming\\npm\\node_modules\\node-gyp\\gyp\\gyp_main.py',
gyp info spawn args   'binding.gyp',
gyp info spawn args   '-f',
gyp info spawn args   'msvs',
gyp info spawn args   '-G',
gyp info spawn args   'msvs_version=2015',
gyp info spawn args   '-I',
gyp info spawn args   'C:\\git\\ecom\\git-repo-inspector\\node_modules\\@data-leakage-protection\\signatures\\node_modules\\re2\\build\\config.gypi',
gyp info spawn args   '-I',
gyp info spawn args   'c:\\Users\\<myId>\\AppData\\Roaming\\npm\\node_modules\\node-gyp\\addon.gypi',
gyp info spawn args   '-I',
gyp info spawn args   'C:\\Users\\<myId>\\.node-gyp\\11.9.0\\include\\node\\common.gypi',
gyp info spawn args   '-Dlibrary=shared_library',
gyp info spawn args   '-Dvisibility=default',
gyp info spawn args   '-Dnode_root_dir=C:\\Users\\<myId>\\.node-gyp\\11.9.0',
gyp info spawn args   '-Dnode_gyp_dir=c:\\Users\\<myId>\\AppData\\Roaming\\npm\\node_modules\\node-gyp',
gyp info spawn args   '-Dnode_lib_file=C:\\Users\\<myId>\\.node-gyp\\11.9.0\\<(target_arch)\\node.lib',
gyp info spawn args   '-Dmodule_root_dir=C:\\git\\ecom\\git-repo-inspector\\node_modules\\@data-leakage-protection\\signatures\\node_modules\\re2',
gyp info spawn args   '-Dnode_engine=v8',
gyp info spawn args   '--depth=.',
gyp info spawn args   '--no-parallel',
gyp info spawn args   '--generator-output',
gyp info spawn args   'C:\\git\\ecom\\git-repo-inspector\\node_modules\\@data-leakage-protection\\signatures\\node_modules\\re2\\build',
gyp info spawn args   '-Goutput_dir=.' ]
Traceback (most recent call last):
  File "c:\Users\<myId>\AppData\Roaming\npm\node_modules\node-gyp\gyp\gyp_main.py", line 13, in <module>
    import gyp
ImportError: No module named gyp
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (c:\Users\v094303\AppData\Roaming\npm\node_modules\node-gyp\lib\configure.js:345:16)
gyp ERR! stack     at ChildProcess.emit (events.js:197:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:254:12)
gyp ERR! System Windows_NT 10.0.16299
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "c:\\Users\\v094303\\AppData\\Roaming\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
gyp ERR! cwd C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2
gyp ERR! node -v v11.9.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok 
npm verb lifecycle re2@1.8.4~install: unsafe-perm in lifecycle true
npm verb lifecycle re2@1.8.4~install: PATH: C:\Users\v094303\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin;C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2\node_modules\.bin;C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\.bin;C:\git\ecom\git-repo-inspector\node_modules\.bin;C:\cygwin64\usr\local\bin;C:\cygwin64\bin;C:\Program Files (x86)\Python36-32\Scripts;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client;C:\Program Files\Intel\iCLS Client;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\MySQL\MySQL Utilities 1.3.5;C:\Program Files (x86)\GitExtensions;C:\Program Files\PuTTY;C:\Program Files (x86)\Sennheiser\SoftphoneSDK;C:\Program Files\Redis;C:\Program Files\Git\cmd;C:\program files\Java\jre8\bin;C:\Program Files\dotnet;C:\Program Files\Microsoft SQL Server\130\Tools\Binn;C:\Program Files (x86)\Microsoft SQL Server\Client SDK\ODBC\130\Tools\Binn;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\ManagementStudio;C:\Program Files\nodejs;C:\cygwin64\bin;C:\Users\v094303\AppData\Local\Microsoft\WindowsApps;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client;C:\Program Files\Intel\iCLS Client;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\MySQL\MySQL Utilities 1.3.5;C:\Program Files (x86)\GitExtensions;C:\Program Files\PuTTY;C:\Program Files (x86)\Sennheiser\SoftphoneSDK;C:\Program Files\Redis;C:\program files\Java\jre8\bin;C:\Users\v094303\AppData\Local\Microsoft\WindowsApps;C:\Maven\apache-maven-3.5.2\bin;C:\ProgramData\Visual Studio Code;C:\Users\v094303\AppData\Roaming\npm
npm verb lifecycle re2@1.8.4~install: CWD: C:\git\ecom\git-repo-inspector\node_modules\@data-leakage-protection\signatures\node_modules\re2
npm info lifecycle re2@1.8.4~install: Failed to exec install script
npm timing action:install Completed in 5548ms
npm verb unlock done using C:\Users\v094303\AppData\Roaming\npm-cache\_locks\staging-4c24b48be61e8043.lock for C:\git\ecom\git-repo-inspector\node_modules\.staging
npm timing stage:rollbackFailedOptional Completed in 578ms
npm timing stage:runTopLevelLifecycles Completed in 25352ms
npm WARN enoent ENOENT: no such file or directory, open 'C:\git\ecom\git-repo-inspector\node_modules\fsevents\package.json'
npm verb enoent This is related to npm not being able to find a file.
npm verb enoent 
npm WARN enoent ENOENT: no such file or directory, open 'C:\git\ecom\git-repo-inspector\node_modules\fsevents\node_modules\rc\package.json'
npm verb enoent This is related to npm not being able to find a file.
npm verb enoent 
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules\jest-haste-map\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Valid OS:    darwin
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Valid Arch:  any
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Actual OS:   win32
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Actual Arch: x64
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Valid OS:    darwin
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Valid Arch:  any
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Actual OS:   win32
npm verb notsup SKIPPING OPTIONAL DEPENDENCY: Actual Arch: x64

npm verb stack Error: re2@1.8.4 install: `node-gyp rebuild`
npm verb stack Exit status 1
npm verb stack     at EventEmitter.<anonymous> (C:\Users\v094303\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\index.js:301:16)
npm verb stack     at EventEmitter.emit (events.js:197:13)
npm verb stack     at ChildProcess.<anonymous> (C:\Users\v094303\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
npm verb stack     at ChildProcess.emit (events.js:197:13)
npm verb stack     at maybeClose (internal/child_process.js:978:16)
npm verb stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:265:5)
npm verb pkgid re2@1.8.4
npm verb cwd C:\git\ecom\git-repo-inspector
npm verb Windows_NT 10.0.16299
npm verb argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\v094303\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "--verbose"
npm verb node v11.9.0
npm verb npm  v6.9.0
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! re2@1.8.4 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the re2@1.8.4 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm verb exit [ 1, true ]
npm timing npm Completed in 27439ms

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\v094303\AppData\Roaming\npm-cache\_logs\2019-06-18T12_03_59_895Z-debug.log

My npm config list settings:

npm config list
; cli configs
metrics-registry = "https://registry.npmjs.org/"
scope = ""
user-agent = "npm/6.9.0 node/v11.9.0 win32 x64"

; project config C:\git\ecom\git-repo-inspector\.npmrc
package-lock = false
unsafe-perm = true

; userconfig C:\Users\v094303\.npmrc
https-proxy = "http://<redacted>.<redacted>.com:80/"
msvs_version = "2017"
node_gyp = "c:\\Users\\<myId>\\AppData\\Roaming\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js"
noproxy = ".<redacted>.com"
prefix = "C:\\Users\\<myId>\\\AppData\\Roaming\\npm"
proxy = "http://<redacted>.<redacted>.com:80/"
python = "c:\\Python27\\python.exe"

; builtin config undefined
prefix = "C:\\Users\\<myId>\\\AppData\\Roaming\\npm"

; node bin location = C:\Program Files\nodejs\node.exe
; cwd = C:\git\ecom\git-repo-inspector
; HOME = C:\Users\<myId>\
; "npm config ls -l" to show all defaults.

[joquijada]

Update: I was able to successfully complete the build. For all those interested this document/repo details how I was able to fix things.

[joquijada]

@rvagg I was hoping someone can comment on some of the findings, for example this one. Could it be something that needs a code fix, or might it be particular to my environment? Thanks.

[rvagg]

K, I'll leave this open for a bit longer in case one of our windows experts has the bandwidth to have a look and has some idea, be warned that there's limited bandwidth available around here and it's not uncommon for more obscure issues to go unanswered. Mostly this issue tracker is a cross-your-fingers kind of deal.

[bzoz]

From the linked code fix I would guess under Cygwin sys.argv[0] does not include the full path to the script. Maybe using abspath:

sys.path.insert(0, os.path.join(os.path.abspath(os.path.dirname(sys.argv[0])), 'pylib'))

will fix this?

@joquijada I don't have Cygwin, could you test this? This also would be a nice first PR :)

[joquijada]

@bzoz Certainly, will try it out and will reply, EOW at the latest. Thanks a lot.

[joquijada]

@bzoz Tried the change, but the absolute path it's building points to re2 module inside my package folder, which is invalid path to be able to find node-gyp's pylib/ folder, see CUSTOM: The path that will be used to load 'gyp' module is /cygdrive/c/git/ecom/git-repo-inspector/node_modules/re2/pylib below. The CUSTOM: The other path is pylib... message points out the path that my fix constructs and with which I got things to install successfully when my fix is enabled, which essentially is the relative pylib/ path to whatever folder things are executing in. In my case I'm pointing to node-gyp installation in my user folder, C:\Users\<my user ID>\AppData\Roaming\npm\node_modules\node-gyp\, as per the npm config below:

node_gyp = "/Users/<my user ID>/AppData/Roaming/npm/node_modules/node-gyp/bin/node-gyp.js"

gyp info spawn args   '-Dnode_engine=v8',
gyp info spawn args   '--depth=.',
gyp info spawn args   '--no-parallel',
gyp info spawn args   '--generator-output',
gyp info spawn args   'C:\\git\\ecom\\git-repo-inspector\\node_modules\\re2\\build',
gyp info spawn args   '-Goutput_dir=.' ]
****************************
*** CUSTOM FIXES DISABLED ***
****************************
CUSTOM: The path that will be used to load 'gyp' module is /cygdrive/c/git/ecom/git-repo-inspector/node_modules/re2/pylib
CUSTOM: The other path is pylib
Traceback (most recent call last):
  File "C:\Users\<my user ID>\AppData\Roaming\npm\node_modules\node-gyp\gyp\gyp_main.py", line 38, in <module>
    import gyp
ImportError: No module named gyp
gyp ERR! configure error
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (C:\Users\<my user ID>\AppData\Roaming\npm\node_modules\node-gyp\lib\configure.js:344:16)
gyp ERR! stack     at ChildProcess.emit (events.js:197:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:254:12)
gyp ERR! System Windows_NT 10.0.16299
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\<my user ID>\\AppData\\Roaming\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
gyp ERR! cwd C:\git\ecom\git-repo-inspector\node_modules\re2
gyp ERR! node -v v11.9.0
gyp ERR! node-gyp -v v5.0.0
gyp ERR! not ok
npm verb lifecycle re2@1.10.0~install: unsafe-perm in lifecycle true

Should we just try using the relative path (pylib/), or might that introduce problems in other kinds of setups?

Thanks.

[bzoz]

Ok, so I've found this on StackOverflow: https://stackoverflow.com/questions/3718657/how-to-properly-determine-current-script-directory. Looks like the correct way to get the script path is:

os.path.dirname(os.path.abspath(__file__))

So, can you try this:

sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), 'pylib'))

[bzoz]

@joquijada did you try those changes?

[joquijada]

@bzoz Not yet, will try by Friday, thanks.

[joquijada]

@bzoz I did further research as well, and found this: https://trac.sagemath.org/ticket/25811. It looks like the os.path.abspath is being given a Windows-style path, and consequently returns something like:
/cygdrive/c/git/ecom/git-repo-inspector/node_modules/re2/C:\Users\v094303\AppData\Roaming\npm\node_modules\node-gyp\gyp\gyp_main.py

Perhaps we need to give Python a "little help" dealing with Windows paths properly in a Cygwin environment. I was thinking of using command cygpath -u <some windows path>, example:

cygpath -u "C:\Users\v094303\AppData\Roaming\npm\node_modules\node-gyp\gyp\gyp_main.py"

and outputs

/cygdrive/c/Users/v094303/AppData/Roaming/npm/node_modules/node-gyp/gyp/gyp_main.py

The Angular CLI ng app for instance makes use of the cygpath command to assist with path format conversion for Cygwin users:

/cygdrive/c/Users/v094303/AppData/Roaming/npm/ng:

#!/bin/sh
basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")

case `uname` in
    *CYGWIN*) basedir=`cygpath -w "$basedir"`;;
esac

if [ -x "$basedir/node" ]; then
  "$basedir/node"  "$basedir/node_modules/@angular/cli/bin/ng" "$@"
  ret=$?
else
  node  "$basedir/node_modules/@angular/cli/bin/ng" "$@"
  ret=$?
fi
exit $ret

I can try out my solution and create a PR. Below is more debug statements I added in the log to help me analyze.

CUSTOM: The path that will be used to load 'gyp' module is /cygdrive/c/Users/v094303/AppData/Roaming/npm/node_modules/node-gyp/gyp/pylib
CUSTOM: sys.argv[0] is C:\Users\v094303\AppData\Roaming\npm\node_modules\node-gyp\gyp\gyp_main.py
CUSTOM: __file__ is C:\Users\v094303\AppData\Roaming\npm\node_modules\node-gyp\gyp\gyp_main.py
CUSTOM: sys.path[0] is /cygdrive/c/Users/v094303/AppData/Roaming/npm/node_modules/node-gyp/gyp/pylib
CUSTOM: os.path.abspath(__file__) is /cygdrive/c/git/ecom/git-repo-inspector/node_modules/re2/C:\Users\v094303\AppData\Roaming\npm\node_modules\node-gyp\gyp\gyp_main.py
CUSTOM: os.path.dirname(os.path.abspath(__file__)) is /cygdrive/c/git/ecom/git-repo-inspector/node_modules/re2
CUSTOM: os.path.dirname(sys.path[0]) is /cygdrive/c/Users/v094303/AppData/Roaming/npm/node_modules/node-gyp/gyp
CUSTOM: os.path.join(sys.path[0], 'pylib') is /cygdrive/c/Users/v094303/AppData/Roaming/npm/node_modules/node-gyp/gyp/pylib/pylib

[bzoz]

I really don't have any idea how Cygwin works. But if you make a PR, we can run it through CI, I can give it a spin locally, and hopefully, we can get this issue solved.