NPM updating to 1.10 which breaks sourcemap sources files at least with concat

[twiggy]

We had our package.json set to ^1.6.0 which then updated to 1.10

If say you have pipe.concat('bundle.js') the sourcemap file will have an array like [ 'bundle.js', 'bundle.js', ... ] for each file that should have been there.

Thanks for contributing to open source! We do appreciate it.

[nmccready]

I need more details with a solid example. Please code up a spec into integration.js in this repo.

[brphelps]

Same issue reporting in, downgrading to 1.9.3 fixed the issue. I'll see if I can help with a repro as time allows today :).

[brphelps]

At the very least, I have a full stack here:
events.js:160
throw er; // Unhandled 'error' event
^

Error: "../../../../../wwwroot/DevTools/DevTools/dev-tools.ts" is not in the SourceMap.
at SourceMapConsumer_sourceContentFor [as sourceContentFor] (\node_modules\source-map\lib\source-map-consumer.js:704:13)
at SourceMapGenerator. (\node_modules\source-map\lib\source-map-generator.js:235:40)
at Array.forEach (native)
at SourceMapGenerator_applySourceMap [as applySourceMap] (\node_modules\source-map\lib\source-map-generator.js:234:32)
at applySourceMap (\node_modules\vinyl-sourcemaps-apply\index.js:27:15)
at transform (\node_modules\gulp-ng-annotate\index.js:26:5)
at DestroyableTransform._transform (\node_modules\gulp-ng-annotate\index.js:58:25)
at DestroyableTransform.Transform._read (\node_modules\through2\node_modules\readable-stream\lib_stream_transform.js:159:10)
at DestroyableTransform.Transform._write (\node_modules\through2\node_modules\readable-stream\lib_stream_transform.js:147:83)
at doWrite (\node_modules\through2\node_modules\readable-stream\lib_stream_writable.js:347:64)
at writeOrBuffer (\node_modules\through2\node_modules\readable-stream\lib_stream_writable.js:336:5)
at DestroyableTransform.Writable.write (\node_modules\through2\node_modules\readable-stream\lib_stream_writable.js:274:11)
at DestroyableTransform.ondata (\node_modules\through2\node_modules\readable-stream\lib_stream_readable.js:546:20)
at emitOne (events.js:96:13)
at DestroyableTransform.emit (events.js:188:7)
at readableAddChunk (\node_modules\through2\node_modules\readable-stream\lib_stream_readable.js:217:18)

[brphelps]

And the pertinent part of our gulpfile :) :

var bundle = gulp.src(srcPaths)
                .pipe(pipeif(mapCondition, sourcemaps.init({ loadMaps: true })))
                .pipe(concat(bundleFileName))
                .pipe(pipeif(mapCondition, sourcemaps.write('./')))
                .pipe(gulp.dest(bundleOutputPath))
            var bundleMin = gulp.src(srcPaths)
                .pipe(pipeif(mapCondition, sourcemaps.init({ loadMaps: true })))
                .pipe(plugins.ngAnnotate({ add: true }))
                .pipe(concat(bundlePrefix + bundleItem.name + '-min.js'))
                .pipe(pipeif(minCondtion, uglify()))
                .pipe(pipeif(mapCondition, sourcemaps.write('./')))
                .pipe(gulp.dest(bundleOutputPath));

[brphelps]

It looks like this is specific to ngAnnotate's usage of sourcemaps, so it's a little difficult for me to repro as a direct consumer of sourcemaps. Is there any additional tracing I should turn on? I was looking in the change history and the large refactoring that happened in 1.10 means I can't easily experiment line by line to see what is causing the problem.

[nmccready]

I am first looking into node_modules\source-map as this could be a new version problem. What version do you have of that lib?

Lastly turn on some logging on gulp-sourcemaps.

DEBUG=gulp-sourcemaps:*

Then we can possibly see where it gets to in gulp-sourcemaps.

Your stack is puzzling as I dont see gulp-sourcemaps in it at all.

[brphelps]

I don't suspect it's a related package version, from what I can tell NPM is only swapping out the source for gulp-sourcemaps.

npm install gulp-sourcemaps@1.10.0

@ms/mseg-eae-pylon-gulp@0.0.0-alpha
`-- gulp-sourcemaps@1.10.0

---At this point it's broken---

npm install gulp-sourcemaps@1.9.3
@ms/mseg-eae-pylon-gulp@0.0.0-alpha
`-- gulp-sourcemaps@1.9.3

---At this point it's working---

[brphelps]

Ran with the debug flags -- basically, the "not working" one looks like this:

gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +411ms gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +8ms gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +4ms gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +12ms gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +2ms gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +13ms gulp-sourcemaps:init { loadMaps: true } +222ms gulp-sourcemaps:utils has preExisting +1ms gulp-sourcemaps:init:internals:loadMaps:_getInlineSources comment REMOVED +1ms gulp-sourcemaps:init { loadMaps: true } +17ms gulp-sourcemaps:utils has preExisting +2ms gulp-sourcemaps:init:internals:loadMaps:_getInlineSources comment REMOVED +2ms

At this point in the not working flow, I see the error stack I posted above.

And the working one looks like this (and has more of the same, basically it looks like it's doing it's job).

gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +434ms
  gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +6ms
  gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +5ms
  gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +9ms
  gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +2ms
  gulp-sourcemaps:write { includeContent: true, addComment: true, charset: 'utf8' } +2ms
  gulp-sourcemaps:init { loadMaps: true } +241ms
  gulp-sourcemaps:init:loadMaps loadMaps +1ms
  gulp-sourcemaps:utils has preExisting +1ms
  gulp-sourcemaps:init:loadMaps comment REMOVED +2ms
  gulp-sourcemaps:init { loadMaps: true } +15ms
  gulp-sourcemaps:init:loadMaps loadMaps +1ms
  gulp-sourcemaps:utils has preExisting +0ms
  gulp-sourcemaps:init:loadMaps comment REMOVED +5ms
  gulp-sourcemaps:init { loadMaps: true } +16ms
  gulp-sourcemaps:init:loadMaps loadMaps +0ms
  gulp-sourcemaps:init { loadMaps: true } +19ms
  gulp-sourcemaps:init:loadMaps loadMaps +1ms

[nmccready]

Ok I think I know the issue. I changed the sources to be flattened within the sourceRoot which is one of the main reasons I bumped to 1.10 and 2.3 .

See lines:

https://github.com/floridoo/gulp-sourcemaps/blob/master/src/write/index.internals.js#L42-L46

The old functionality just passed filePath on. So in your write add:

var bundle = gulp.src(srcPaths)
                .pipe(pipeif(mapCondition, sourcemaps.init({ loadMaps: true })))
                .pipe(concat(bundleFileName))
                .pipe(pipeif(mapCondition, sourcemaps.write('./', (filePath) => return filePath;)))
                .pipe(gulp.dest(bundleOutputPath))
var bundleMin = gulp.src(srcPaths)
                .pipe(pipeif(mapCondition, sourcemaps.init({ loadMaps: true })))
                .pipe(plugins.ngAnnotate({ add: true }))
                .pipe(concat(bundlePrefix + bundleItem.name + '-min.js'))
                .pipe(pipeif(minCondtion, uglify()))
                .pipe(pipeif(mapCondition, sourcemaps.write('./', {mapSources: (filePath) => return filePath;})))
                .pipe(gulp.dest(bundleOutputPath));

[nmccready]

My guess was from this Error: "../../../../../wwwroot/DevTools/DevTools/dev-tools.ts" is not in the SourceMap.

[brphelps]

That change doesn't seem to have an effect.

Pertinent code is now:

var bundle = gulp.src(srcPaths)
                .pipe(pipeif(mapCondition, sourcemaps.init({ loadMaps: true })))
                .pipe(concat(bundleFileName))
                .pipe(pipeif(mapCondition, sourcemaps.write('./', {mapSources: function(filePath) { return filePath; }})))
                .pipe(gulp.dest(bundleOutputPath))
            var bundleMin = gulp.src(srcPaths)
                .pipe(pipeif(mapCondition, sourcemaps.init({ loadMaps: true })))
                .pipe(plugins.ngAnnotate({ add: true }))
                .pipe(concat(bundlePrefix + bundleItem.name + '-min.js'))
                .pipe(pipeif(minCondtion, uglify()))
                .pipe(pipeif(mapCondition, sourcemaps.write('./', {mapSources: function(filePath) { return filePath; }})))
                .pipe(gulp.dest(bundleOutputPath));

[nmccready]

What happens if you remove some steps. First ngAnnotate, then concat?

[nmccready]

Anyway instead of going back and forth here if you make a reproducible example and PR it to integration.js on 1.X I can actually run it. I am not cutting and pasting code that might throw.

[brphelps]

Issue seems to be specific to ngAnnotate being in the pipe.

I'll try to make time to do that today. For the time being we're targeting version 1.9.3.