javascript - Remove part of sourcemaps mapping -


i have 2 gulp tasks: first handles caching + babel + sourcemaps, other 1 concatenates translated files 1 single javascript file + sourcemaps.

gulp.task('prepare:js', () => {   const babeloptions = {     "presets": [       [         "env",         { "targets": { "browsers": ["firefox >= 24"]} }       ]     ]   }   return gulp.src('app/scripts')     .pipe(changed('.tmp/scripts'))     .pipe(sourcemaps.init())     .pipe(babel(babeloptions))     .pipe(sourcemaps.write('.'))     .pipe(gulp.dest('.tmp/scripts')) })  gulp.task('package:js', ['prepapre:js'], () => {   return gulp.src(['.tmp/scripts/*.js', '.tmp/scripts/**/*.js'])     .pipe(sourcemaps.init({loadmaps: true}))     .pipe(concat('app.bundle.js'))     .pipe(sourcemaps.write('.'))     .pipe(gulp.dest('dist/scripts)) })

it works want. remaining issue sourcemaps. indeed, generates single sourcemap duplicate informations:

  • one mapping between original code (located in app/scripts) , concatenated file loadmaps: true (that's 1 want keep)
  • another mapping between babelified code (located in .tmp/scripts) , concatenated code (that's 1 want rid of).

the thing is, if remove instruction .pipe(sourcemaps.init({loadmaps: true})), first sourcemaps no longer included. merge these 2 tasks not able use gulp-changed anymore (since change file located in app/scripts trigger concatenation , refresh cache).

how can rid of second mapping?


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