running gulp kitSass fails with TypeError: Arguments to path.join must be strings

[tvmaly]

[10:00:14] Using gulpfile ~/webdev/test/gulpfile.js
[10:00:14] Starting 'kitJson'...
[10:00:14] Starting 'kitCoffee'...
[10:00:14] Starting 'kitSass'...
[10:00:15] 'kitSass' errored after 7.96 ms
[10:00:15] TypeError: Arguments to path.join must be strings
at Object.posix.join (path.js:471:13)
at module.exports (/home/tmaly/webdev/test/node_modules/gulp-ruby-sass/index.js:65:15)
at Gulp. (/home/tmaly/webdev/test/gulpfile.coffee:113:10)
at module.exports (/home/tmaly/webdev/test/node_modules/gulp/node_modules/orchestrator/lib/runTask.js:34:7)
at Gulp.Orchestrator._runTask (/home/tmaly/webdev/test/node_modules/gulp/node_modules/orchestrator/index.js:273:3)
at Gulp.Orchestrator._runStep (/home/tmaly/webdev/test/node_modules/gulp/node_modules/orchestrator/index.js:214:10)
at Gulp.Orchestrator.start (/home/tmaly/webdev/test/node_modules/gulp/node_modules/orchestrator/index.js:134:8)
at /usr/local/lib/node_modules/gulp/bin/gulp.js:129:20
at process._tickCallback (node.js:355:11)
at Function.Module.runMain (module.js:503:11)
at startup (node.js:129:16)
at node.js:814:3

[10:00:17] Finished 'kitJson' after 2.9 s
[10:00:24] gulp-size: maxmertkit.js 91.33 kB
[10:00:24] Finished 'kitCoffee' after 11 s

[tvmaly]

this is related to a breaking change in the latest gulp-ruby-sass
http://stackoverflow.com/questions/28140012/gulp-typeerror-arguments-to-path-join-must-be-strings
the simplest work around is probably to use gulp-sass I am still working on a solution

[tvmaly]

Ok here is what worked for me
first run: npm install gulp-sourcemaps
and npm install gulp-sass

then edit your gulpfile.coffee

change the gulp-ruby-sass import to
sass = require 'gulp-sass'
and add line
sourcemaps = require 'gulp-sourcemaps'

then edit the two tasks that use sass
to:

gulp.task 'kitSass', ->

files = [
    "#{path.kit.sass}/main.sass"
]

gulp.src( files )
    .pipe( plumber() )
    # .pipe( cache('kitSass') )
        .pipe(sourcemaps.init())
        .pipe(sass({
            errLogToConsole: true
        }))
        .pipe(sourcemaps.write())
    .pipe( size( showFiles: yes ) )
    .pipe( gulp.dest "#{path.kit.css}" )
    # .pipe( livereload() )

gulp.task 'docsSass', ->

files = [
    "#{path.docs.front.sass}/developer.sass"
]

gulp.src( files )
    .pipe( plumber() )
    # .pipe( cache('kitSass') )
        .pipe(sourcemaps.init())
        .pipe(sass({
            errLogToConsole: true
        }))
        .pipe(sourcemaps.write())
    .pipe( size( showFiles: yes ) )
    .pipe( gulp.dest "#{path.docs.front.css}" )
    # .pipe( livereload() )

then you can run your gulp command