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Hi,  I’m trying to set up Gulp & Sass as per…  https://docs.mendix.com/howto8/front-end/sass-eight … but I’m stuck on step 7 in section 3…  Write npm install or use npm install gulp-cli -g with your app running locally on Studio Pro: I just get the errors shown below.  BTW I’m doing this in the context of the Learning Part “Build an app with Advanced Page Building”, where I’m currently stuck on exercise 3.7.1.  Can anyone offer any advice on this, please?  Thanks, Maarten   Errors in Powershell PS C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main> npm install npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated npm WARN deprecated har-validator@5.1.5: this library is no longer supported npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated npm WARN deprecated debug@4.1.1: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797) npm WARN deprecated debug@4.1.1: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797) npm WARN deprecated chokidar@2.1.8: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies. npm WARN deprecated debug@4.1.1: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797) npm WARN deprecated uuid@3.4.0: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details. npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142 npm ERR! code 1 npm ERR! path C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\node-sass npm ERR! command failed npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c node scripts/build.js npm ERR! Building: C:\Program Files\nodejs\node.exe C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library= npm ERR! gyp info it worked if it ends with ok npm ERR! gyp verb cli [ npm ERR! gyp verb cli   'C:\\Program Files\\nodejs\\node.exe', npm ERR! gyp verb cli   'C:\\Users\\Maarten.de.Vries\\Documents\\Mendix\\Expenses-main\\node_modules\\node-gyp\\bin\\node-gyp.js', npm ERR! gyp verb cli   'rebuild', npm ERR! gyp verb cli   '--verbose', npm ERR! gyp verb cli   '--libsass_ext=', npm ERR! gyp verb cli   '--libsass_cflags=', npm ERR! gyp verb cli   '--libsass_ldflags=', npm ERR! gyp verb cli   '--libsass_library=' npm ERR! gyp verb cli ] npm ERR! gyp info using node-gyp@3.8.0 npm ERR! gyp info using node@16.4.2 | win32 | x64 npm ERR! gyp verb command rebuild [] npm ERR! gyp verb command clean [] npm ERR! gyp verb clean removing "build" directory npm ERR! gyp verb command configure [] npm ERR! gyp verb check python checking for Python executable "python2" in the PATH npm ERR! gyp verb `which` failed Error: not found: python2 npm ERR! gyp verb `which` failed     at getNotFoundError (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:13:12) npm ERR! gyp verb `which` failed     at F (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:68:19) npm ERR! gyp verb `which` failed     at E (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:80:29) npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:89:16 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\index.js:42:5 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\windows.js:36:5 npm ERR! gyp verb `which` failed     at FSReqCallback.oncomplete (node:fs:195:21) npm ERR! gyp verb `which` failed  python2 Error: not found: python2 npm ERR! gyp verb `which` failed     at getNotFoundError (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:13:12) npm ERR! gyp verb `which` failed     at F (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:68:19) npm ERR! gyp verb `which` failed     at E (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:80:29) npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:89:16 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\index.js:42:5 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\windows.js:36:5 npm ERR! gyp verb `which` failed     at FSReqCallback.oncomplete (node:fs:195:21) { npm ERR! gyp verb `which` failed   code: 'ENOENT' npm ERR! gyp verb `which` failed } npm ERR! gyp verb check python checking for Python executable "python" in the PATH npm ERR! gyp verb `which` failed Error: not found: python npm ERR! gyp verb `which` failed     at getNotFoundError (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:13:12) npm ERR! gyp verb `which` failed     at F (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:68:19) npm ERR! gyp verb `which` failed     at E (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:80:29) npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:89:16 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\index.js:42:5 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\windows.js:36:5 npm ERR! gyp verb `which` failed     at FSReqCallback.oncomplete (node:fs:195:21) npm ERR! gyp verb `which` failed  python Error: not found: python npm ERR! gyp verb `which` failed     at getNotFoundError (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:13:12) npm ERR! gyp verb `which` failed     at F (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:68:19) npm ERR! gyp verb `which` failed     at E (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:80:29) npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\which\which.js:89:16 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\index.js:42:5 npm ERR! gyp verb `which` failed     at C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\isexe\windows.js:36:5 npm ERR! gyp verb `which` failed     at FSReqCallback.oncomplete (node:fs:195:21) { npm ERR! gyp verb `which` failed   code: 'ENOENT' npm ERR! gyp verb `which` failed } npm ERR! gyp verb could not find "python". checking python launcher npm ERR! gyp verb could not find "python". guessing location npm ERR! gyp verb ensuring that file exists: C:\Python27\python.exe npm ERR! gyp ERR! configure error npm ERR! gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable. npm ERR! gyp ERR! stack     at PythonFinder.failNoPython (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\node-gyp\lib\configure.js:484:19) npm ERR! gyp ERR! stack     at PythonFinder.<anonymous> (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\node-gyp\lib\configure.js:509:16) npm ERR! gyp ERR! stack     at callback (C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\graceful-fs\polyfills.js:299:20) npm ERR! gyp ERR! stack     at FSReqCallback.oncomplete (node:fs:195:21) npm ERR! gyp ERR! System Windows_NT 10.0.19043 npm ERR! gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Maarten.de.Vries\\Documents\\Mendix\\Expenses-main\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library=" npm ERR! gyp ERR! cwd C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main\node_modules\node-sass npm ERR! gyp ERR! node -v v16.4.2 npm ERR! gyp ERR! node-gyp -v v3.8.0 npm ERR! gyp ERR! not ok npm ERR! Build failed with error code: 1 npm ERR! A complete log of this run can be found in: npm ERR!     C:\Users\Maarten.de.Vries\AppData\Local\npm-cache\_logs\2021-07-05T22_17_33_707Z-debug.log PS C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main> npm install gulp-cli -g npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated changed 265 packages, and audited 266 packages in 4s 6 packages are looking for funding   run `npm fund` for details 3 low severity vulnerabilities To address all issues, run:   npm audit fix Run `npm audit` for details. PS C:\Users\Maarten.de.Vries\Documents\Mendix\Expenses-main> npm run dev > ux-gulp-theming@1.7.0 dev > ./node_modules/.bin/gulp dev '.' is not recognized as an internal or external command, operable program or batch file.

asked 2021-07-05

2 answers