No Style in frontend after doing all this coding adventure

[gcampedelli]

I'm not a developer, but I arrived to this point and I have no style in frontend

``` ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/config$ nano themes.json ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/config$ cd /var/www/magento2/app/design/frontend/snowdog/vendor/sn owdog/frontools/ ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ gulp styles --theme sass-blank [19:27:16] Using gulpfile /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/gulpfile.js [19:27:16] Starting 'styles'... [19:27:16] Starting 'inheritance'... [19:27:16] Finished 'inheritance' after 7.43 ms [19:27:17] 'styles' errored after 605 ms [19:27:17] Error: ENOENT: no such file or directory, scandir '/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/vendor' at Error (native) at Object.fs.readdirSync (fs.js:808:18) at Object.getInstalledBinaries (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/extensions.js:121:13) at foundBinariesList (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:20:15) at foundBinaries (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:15:5) at Object.module.exports.missingBinary (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:45:5) at module.exports (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/binding.js:15:30) at Object. (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/index.js:14:35) at Module._compile (module.js:410:26) at Object.Module._extensions..js (module.js:417:10) ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ cd config ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/config$ nano themes.json ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/config$ cd /var/www/magento2/app/design/frontend/snowdog/vendor/sn owdog/frontools/ ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ gulp styles --theme sass-blank [19:29:32] Using gulpfile /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/gulpfile.js [19:29:32] Starting 'styles'... [19:29:32] Starting 'inheritance'... [19:29:32] Finished 'inheritance' after 6.68 ms [19:29:32] 'styles' errored after 285 ms [19:29:32] Error: ENOENT: no such file or directory, scandir '/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/vendor' at Error (native) at Object.fs.readdirSync (fs.js:808:18) at Object.getInstalledBinaries (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/extensions.js:121:13) at foundBinariesList (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:20:15) at foundBinaries (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:15:5) at Object.module.exports.missingBinary (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:45:5) at module.exports (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/binding.js:15:30) at Object. (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/index.js:14:35) at Module._compile (module.js:410:26) at Object.Module._extensions..js (module.js:417:10) ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ sudo gulp styles --theme sass-blank [19:29:37] Using gulpfile /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/gulpfile.js [19:29:37] Starting 'styles'... [19:29:37] Starting 'inheritance'... [19:29:37] Finished 'inheritance' after 7.88 ms [19:29:38] 'styles' errored after 283 ms [19:29:38] Error: ENOENT: no such file or directory, scandir '/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/vendor' at Error (native) at Object.fs.readdirSync (fs.js:808:18) at Object.getInstalledBinaries (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/extensions.js:121:13) at foundBinariesList (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:20:15) at foundBinaries (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:15:5) at Object.module.exports.missingBinary (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/errors.js:45:5) at module.exports (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/binding.js:15:30) at Object. (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/index.js:14:35) at Module._compile (module.js:410:26) at Object.Module._extensions..js (module.js:417:10) ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ ls composer.json gulpfile.js LICENSE package.json task themes.json config helper node_modules README.md __test__ yarn.lock ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ cd node_modules ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules$ ls abbrev json-stringify-safe accepts jsprim acorn js-tokens acorn-jsx js-yaml acorn-object-spread kind-of after klaw ajv known-css-properties ajv-keywords lazy-cache align-text lazy-debug-legacy alphanum-sort lcid amdefine ldjson-stream ansicolors levn ansi-escapes liftoff ansi-regex limiter ansi-styles load-json-file anymatch localtunnel aproba lodash archy lodash._arraycopy are-we-there-yet lodash._arrayeach argparse lodash.assign arraybuffer.slice lodash.assignwith array-differ lodash._baseassign array-find-index lodash._baseclone array-union lodash._basecopy array-uniq lodash._basefor array-unique lodash._basetostring arr-diff lodash._basevalues arr-flatten lodash._bindcallback arrify lodash.capitalize asn1 lodash.clonedeep assert-plus lodash.escape async lodash._getnative async-each lodash.indexof async-each-series lodash.isarguments async-foreach lodash.isarray asynckit lodash.isempty atob lodash.isfinite autoprefixer lodash._isiterateecall aws4 lodash.isplainobject aws-sign2 lodash.isstring babel-code-frame lodash.kebabcase backo2 lodash.keys balanced-match lodash.mapvalues base64-arraybuffer lodash.memoize base64id lodash.pick batch lodash._reescape bcrypt-pbkdf lodash._reevaluate beeper lodash._reinterpolate better-assert lodash.restparam binary-extensions lodash._root blob lodash.template block-stream lodash.templatesettings boom lodash.uniq brace-expansion log-symbols braces longest browserslist loud-rejection browser-sync lru-cache browser-sync-client macaddress browser-sync-ui magic-string bs-recipes make-error buble make-error-cause bubleify map-cache buffer-shims map-obj bufferstreams marked builtin-modules marked-terminal caller-path math-expression-evaluator callsite meow callsites merge camelcase merge-stream camelcase-keys micromatch caniuse-api mime caniuse-db mime-db cardinal mime-types caseless minimatch center-align minimist chalk mkdirp chokidar ms circular-json multimatch clap multipipe cli-cursor mute-stream cli-table nan cliui natives cli-usage natural-compare cli-width negotiator clone node-emoji cloneable-readable node.extend clone-buffer node-gyp clone-regexp node-notifier clone-stats node-sass co nopt coa normalize-package-data code-point-at normalize-path color normalize-range color-convert normalize-selector color-diff normalize-url colorguard npmlog colormin num2fraction color-name number-is-nan colors oauth-sign color-string object-assign combined-stream object-component commander object.omit component-bind object-path component-emitter once component-inherit onecolor concat-map onetime concat-stream on-finished concat-with-sourcemaps openurl connect opn connect-history-api-fallback optionator console-control-strings options convert-source-map orchestrator cookie ordered-read-streams core-util-is osenv cosmiconfig os-homedir cross-spawn os-locale cryptiles os-tmpdir css parse-filepath css-color-names parse-glob cssnano parsejson csso parse-json css-rule-stream parse-passwd css-tokenize parseqs currently-unhandled parseuri d parseurl dashdash path-exists dateformat path-is-absolute debug path-is-inside debug-fabulous path-root decamelize path-root-regex deep-is path-type defaults pify defined pinkie del pinkie-promise delayed-stream pipetteur delegates plur depd pluralize deprecated portscanner destroy postcss detect-file postcss-calc detect-newline postcss-colormin dev-ip postcss-convert-values doctrine postcss-discard-comments doiuse postcss-discard-duplicates duplexer postcss-discard-empty duplexer2 postcss-discard-overridden duplexify postcss-discard-unused easy-extender postcss-filter-plugins eazy-logger postcss-less ecc-jsbn postcss-media-query-parser ee-first postcss-merge-idents electron-to-chromium postcss-merge-longhand emitter-steward postcss-merge-rules encodeurl postcss-message-helpers end-of-stream postcss-minify-font-values engine.io postcss-minify-gradients engine.io-client postcss-minify-params engine.io-parser postcss-minify-selectors error-ex postcss-normalize-charset es5-ext postcss-normalize-url es6-iterator postcss-ordered-values es6-map postcss-reduce-idents es6-set postcss-reduce-initial es6-symbol postcss-reduce-transforms es6-weak-map postcss-reporter escape-html postcss-resolve-nested-selector escape-string-regexp postcss-scss escope postcss-selector-parser eslint postcss-svgo espree postcss-unique-selectors esprima postcss-value-parser esrecurse postcss-zindex estraverse prelude-ls esutils prepend-http etag preserve event-emitter pretty-hrtime eventemitter3 process-nextick-args execall progress exit-hook pseudomap expand-brackets punycode expand-range q expand-tilde qs express query-string extend randomatic extglob range-parser extsprintf readable-stream fancy-log readdirp fast-levenshtein read-file-stdin figures readline2 file-entry-cache read-pkg filename-regex read-pkg-up fill-range rechoir finalhandler redent find-index redeyed find-up reduce-css-calc findup-sync reduce-function-call fined regex-cache first-chunk-stream remove-trailing-separator flagged-respawn rename flat-cache repeat-element flatten repeating forever-agent repeat-string for-in replace-ext fork-stream request form-data require-directory formidable require-from-string for-own require-main-filename fresh requires-port front-matter require-uncached frontools resolve fs-exists-sync resolve-dir fs-extra resolve-from fs.realpath resolve-url fstream resp-modifier function-bind restore-cursor gather-stream right-align gauge rimraf gaze run-async generate-function run-sequence generate-object-property rx get-caller-file rx-lite getpass sass-graph get-stdin sass-lint glob sax glob2base semver global-modules send global-prefix sequencify globals serve-index glob-base server-destroy globby serve-static globjoin set-blocking glob-parent set-immediate-shim glob-stream setprototypeof globule shelljs glob-watcher shellwords glogg sigmund gonzales-pe signal-exit graceful-fs slice-ansi graceful-readlink sntp growly socket.io gulp socket.io-adapter gulp-concat socket.io-client gulp-eslint socket.io-parser gulp-if sort-keys gulp-load-plugins source-map gulplog source-map-resolve gulp-logger source-map-url gulp-match sparkles gulp-multi-dest spdx-correct gulp-notify spdx-expression-parse gulp-plumber spdx-license-ids gulp-postcss specificity gulp-rimraf split2 gulp-sass sprintf-js gulp-sass-lint sshpk gulp-sourcemaps statuses gulp-task-loader stream-combiner gulp-uglify stream-consume gulp-util stream-shift har-validator stream-throttle has strict-uri-encode has-ansi string_decoder has-binary string.prototype.codepointat has-cors stringstream has-flag string-width has-gulplog strip-ansi has-unicode strip-bom hawk strip-indent hoek strip-json-comments homedir-polyfill stylehacks hosted-git-info stylelint html-comment-regex style-search html-tags sugarss http-errors supports-color http-proxy svgo http-signature svg-tags ignore synesthesia immutable table imurmurhash tar indent-string ternary-stream indexes-of text-table indexof tfunk inflight through inherits through2 ini tildify in-publish time-stamp inquirer to-array interpret tough-cookie invert-kv trim-newlines irregular-plurals tryit is tunnel-agent is-absolute tweetnacl is-absolute-url type-check isarray typedarray is-arrayish ua-parser-js is-binary-path uglify-js is-buffer uglify-save-license is-builtin-module uglify-to-browserify is-dotfile ultron is-equal-shallow unc-path-regex isexe underscore is-extendable uniq is-extglob uniqid is-finite uniqs is-fullwidth-code-point unique-stream is-glob unpipe is-my-json-valid urix is-number user-home is-number-like util isobject util-deprecate is-path-cwd utils-merge is-path-in-cwd uuid is-path-inside v8flags is-plain-obj validate-npm-package-license is-posix-bracket vendors is-primitive verror is-property vinyl is-regexp vinyl-fs is-relative vinyl-sourcemaps-apply is-resolvable vlq isstream weinre is-stream whet.extend is-supported-regexp-flag which is-svg which-module is-typedarray wide-align is-unc-path window-size is-utf8 wordwrap is-windows wrap-ansi jodid25519 wrappy js-base64 write jsbn write-file-stdout json3 ws jsonfile wtf-8 jsonfilter xmlhttprequest-ssl jsonify xtend jsonparse y18n jsonpointer yallist json-schema yargs json-stable-stringify yargs-parser JSONStream yeast ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules$ cd node_sass -bash: cd: node_sass: No such file or directory ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules$ cd node-sass ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass$ ls bin CHANGELOG.md LICENSE package.json scripts test binding.gyp lib node_modules README.md src ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass$ mkdir vendor ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass$ cd /var/www/magento2/app/design/frontend/s nowdog/vendor/snowdog/frontools/ ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ gulp styles --theme sass-blank [19:33:52] Using gulpfile /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/gulpfile.js [19:33:52] Starting 'styles'... [19:33:52] Starting 'inheritance'... [19:33:52] Finished 'inheritance' after 6.48 ms [19:33:52] 'styles' errored after 277 ms [19:33:52] Error: Missing binding /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/vendor/linux-x64-46/binding.node Node Sass could not find a binding for your current environment: Linux 64-bit with Node.js 4.x Found bindings for the following environments: This usually happens because your environment has changed since running `npm install`. Run `npm rebuild node-sass` to build the binding for your current environment. at module.exports (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/binding.js:15:13) at Object. (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/lib/index.js:14:35) at Module._compile (module.js:410:26) at Object.Module._extensions..js (module.js:417:10) at Module.load (module.js:344:32) at Function.Module._load (module.js:301:12) at Module.require (module.js:354:17) at require (internal/module.js:12:17) at Object. (/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/gulp-sass/index.js:187:21) at Module._compile (module.js:410:26) ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ npm rebuild node-sass > node-sass@3.13.1 install /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass > node scripts/install.js Downloading binary from https://github.com/sass/node-sass/releases/download/v3.13.1/linux-x64-46_binding.node Download complete ] - : Binary saved to /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/vendor/linux-x64-46/binding.node Caching binary to /home/ubuntu/.npm/node-sass/3.13.1/linux-x64-46_binding.node > node-sass@3.13.1 postinstall /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass > node scripts/build.js Binary found at /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass/vendor/linux-x64-46/binding.node Testing binary Binary is fine node-sass@3.13.1 /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/node_modules/node-sass ubuntu@ip-xxx-xxx--208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ gulp styles --theme sass-blank [19:34:45] Using gulpfile /var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools/gulpfile.js [19:34:45] Starting 'styles'... [19:34:45] Starting 'inheritance'... [19:34:45] Finished 'inheritance' after 7.09 ms [19:34:46] Finished 'styles' after 1.43 s ubuntu@ip-xxx.xxx-208:/var/www/magento2/app/design/frontend/snowdog/vendor/snowdog/frontools$ ```

Is there anything I'm missing? I was expecting a similar page to default Magento Blank Theme. Can you help me on that?

[Igloczek]

Ouh... Few questions:

1. How did you installed Magento2?
2. How and where did you installed sass-blank-theme?
3. Why do you want to use this tools and theme, if you are not a developer?

Advices:

1. Proper path for Frontools is in your case/var/www/magento2/vendor/snowdog/frontools, that's why Frontools can't handle processing of your styles.
2. Never modify anything inside node_modules directory. If you have any troubles, just remove this directory and run npm install again. If problem will still exist, check system requirements i.e. node.js version (you need versions>=6.9.1 but not 7.x)

[gcampedelli]

Thank you for your answer Igloczek. It is always time to learn from my mistakes.

Questions 1 and 2 :Fresh Magento install on Ubuntu 16.04 at /var/www/html (I’ve corrected this by reinstalling Magento). I used composer (Answer for question 3 at end)

I installed MySql, Apache2, all requirements and went to magento setup page and installed. Then I did as follow

Install Node.js - curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh | bash

$nvm install 6.9.1 
$nvm use 6.9.1 
$nvm alias default 6.9.1
$npm install -g gulp-cli

Switched to my Magento2 dir

cd /var/www/html/Magento2

composer require snowdog/theme-blank-sass

Got an error

“Problem 1
    - Installation request for snowdog/theme-blank-sass ^0.9.2 -> satisfiable by snowdog/theme-blank-sass[0.9.2].
    - snowdog/theme-blank-sass 0.9.2 requires magento/framework 100.1.* -> no matching package found.

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.

Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.”

Proceed to Manual Install

Downloaded Theme from Github repository v.0.9.0

Upload to /app/design/frontend/snowdog/theme-blank-sass

unzip

Changed dir again to /magento2/vendor/snowdog/frontools npm install error killed

Then manual install of tree in composer.json

run command gulp setup

Removed .sample from Themes.json in config dir

run command gulp styles --theme blank

[01:47:21] Working directory changed to /var/www/html/magento2/vendor/snowdog/frontools
[01:47:21] Using gulpfile /var/www/html/magento2/vendor/snowdog/frontools/gulpfile.js
[01:47:21] Starting 'styles'...
[01:47:21] Starting 'inheritance'...
[01:47:21] Finished 'inheritance' after 9.16 ms
[01:47:22] Finished 'styles' after 810 ms

cd to bin and run php magento setup:static-content:deploy -f

Got error:

[UnexpectedValueException]                                                   
  Could not parse theme static file '/var/www/html/magento2/app/design/fronte  
  nd/snowdog/theme-blank-sass/__test__/web/css/styles.css'

Now I get 500 error in http

Then I configure everything again and I've tried the follow in magento2/bin

php magento dev:source-theme:deploy --type="sass" --locale="en_US" --area="frontend" --theme="snowdog/theme-blank-sass" __test__/web/ css/styles

But I get this message

[InvalidArgumentException]                                                                                                                            
  Verify entered values of the argument and options. Unable to resolve the source file for 'frontend/snowdog/theme-blank-sass/en_US/__test__/web.sass' 

Anyway, it is missing the symlink in /var/www/html/magento2/pub/static/frontend/Snowdog/blank/en_US

And I have no idea how to properly create it. But from the error messages I get, I suppose that's the problem I'm facing. I also changed permissions to 777 and so on.

Any ideas??

Answer to question 3: Well, I'm a journalist and by this time, I'm a coffee producer. I mainly work with branding and I have some experience with Magento 1. I'm trying to learn all this thing of Magento 2 development to setup my coffee store with my look and feel as I have lots of experience as designer. So, I'm trying to become a developer. I make lots of mistakes, but I think they are an opportunity to learn. But why work with this tools? Well, I think it is a very good idea to have SASS on Magento and why should I waste your nice work on that? We all face problems during development, it is nice if we can share and make things better from there. If you can help with this issue I would be very happy.

Thank you again for your answer, Gabriela

[Igloczek]

Looks like you are trying to use not stable version of Magento 2 and this lead you to weird solutions.

Try to install M2.1.3 via composer, then add theme and frontools via composer too and it will just start working.

When you are using composer all of necessary code sits inside vendor/{vendor_name}/{package_name} instead of app/... and I'd recommend to stick with this version, but it require to create a new repository for every added module i.e. modified theme.

Working with M2 is a bit more complicated than M1, so I'd advice to read docs one more time or try to find some "how to basics", b/c I'm not able to support you with everything.

[gcampedelli]

Hello Igloczek.

I was able to manage by myself a Magento install 2.1.3, composer install your modules, verify that everything is ok. Ir worked so far except for the fact that Yarn is much faster and better when we have to npm install in frontools module. So far so good. But when I gulp styles in frontools, I'm still getting error messages despite the fact everything is properly installed. So the error message I get is this one

Error in plugin 'run-sequence(inheritance)'
Message:
    ENOENT: no such file or directory, symlink '/var/www/html/magento2/vendor/snowdog/theme-blank-sass/Magento_AdvancedCheckout/styles/_module.scss' -> '/var/www/html/magento2/var/view_preprocessed/frontools/frontend/Snowdog/blank/Magento_AdvancedCheckout/styles/_module.scss'
Details:
    errno: -2
    code: ENOENT
    syscall: symlink
    path: /var/www/html/magento2/vendor/snowdog/theme-blank-sass/Magento_AdvancedCheckout/styles/_module.scss
    dest: /var/www/html/magento2/var/view_preprocessed/frontools/frontend/Snowdog/blank/Magento_AdvancedCheckout/styles/_module.scss
Stack:
Error: ENOENT: no such file or directory, symlink '/var/www/html/magento2/vendor/snowdog/theme-blank-sass/Magento_AdvancedCheckout/styles/_module.scss' -> '/var/www/html/magento2/var/view_preprocessed/frontools/frontend/Snowdog/blank/Magento_AdvancedCheckout/styles/_module.scss'
    at Error (native)
    at Object.fs.symlinkSync (fs.js:1054:18)
    at createSymlink (/var/www/html/magento2/vendor/snowdog/frontools/helper/inheritance-resolver.js:16:18)
    at plugins.globby.sync.forEach.srcPath (/var/www/html/magento2/vendor/snowdog/frontools/helper/inheritance-resolver.js:41:7)
    at Array.forEach (native)
    at module.exports (/var/www/html/magento2/vendor/snowdog/frontools/helper/inheritance-resolver.js:40:8)
    at themes.forEach.name (/var/www/html/magento2/vendor/snowdog/frontools/task/inheritance.js:9:46)
    at Array.forEach (native)
    at Object.module.exports (/var/www/html/magento2/vendor/snowdog/frontools/task/inheritance.js:8:10)
    at module.exports (/var/www/html/magento2/vendor/snowdog/frontools/node_modules/orchestrator/lib/runTask.js:34:7)

Did I make something wrong? Is it themes.json?

Anyway, thank you so much for your advice. I think others reading this can overcome their mistakes as well and soon I think we can close this thread as solved. But it looks like a nice work, but I still can't get blank-sass styles in place. I read you instructions, maybe there is something there I misunderstood. But for instance, reading your instructions I found out yarn is better than npm and so on. Maybe a final instruction can help everybody with same issue.

[Igloczek]

Kinda weird... Did you make any changes in vendor/snowdog/theme-blank-sass? You shouldn't. If not, try to remove var/view_preprocessed and run gulp styles again.

[gcampedelli]

Wow, just worked! Nice work to go on! Congratulations on that! I will try to go further and deploy my on theme using yours as base. For instance, thanks a lot for your support.

[Igloczek]

You're welcome :)