I also have an issue with sourcemap fingerprinting in 4.0.2.

The behavior change is demonstrated below. 4.0.2 is giving sourcemaps a unique fingerprint in assetMap.json, but the actual sourcemap file outputted shares its fingerprint with the js file. 4.0.1 does not do this.

Using 4.0.2

// assetMap.json
"assets/test-support.js": "assets/test-support-dbb5b19fdf03c2859ae16e7a1dc9f707.js",
"assets/test-support.map": "assets/test-support-a232a08ab47844d681757e283aac30fb.map",
"assets/vendor.js": "assets/vendor-a63514bff922c4c7f9211ecf9cf9a95c.js",
"assets/vendor.map": "assets/vendor-4548cf25b0650519a3bf0fcebb824d59.map",

% ls dist/assets/ | grep "\.map\|\.js"
test-support-dbb5b19fdf03c2859ae16e7a1dc9f707.js
test-support-dbb5b19fdf03c2859ae16e7a1dc9f707.map
vendor-a63514bff922c4c7f9211ecf9cf9a95c.js
vendor-a63514bff922c4c7f9211ecf9cf9a95c.map

Using 4.0.1

// assetMap.json
"assets/test-support.js": "assets/test-support-89a301f350d8c442d70b96cac2dc78ea.js",
"assets/test-support.map": "assets/test-support-88005702a86610103bf026f97bdad64c.map",
"assets/vendor.js": "assets/vendor-bf70bec9c3a1a3e083ff253e401d322a.js",
"assets/vendor.map": "assets/vendor-db69401ed5c970a866ea1dc33e0fa8b5.map",

% ls dist/assets/ | grep "\.map\|\.js"
test-support-88005702a86610103bf026f97bdad64c.map
test-support-89a301f350d8c442d70b96cac2dc78ea.js
vendor-bf70bec9c3a1a3e083ff253e401d322a.js
vendor-db69401ed5c970a866ea1dc33e0fa8b5.map

And here is my relevant configs from ember-cli-build.js

{
  fingerprint: {
    enabled: true,
    prepend: '[our cdn]',
    generateAssetMap: true,
    extensions: [
      'js', 'css', 'png', 'jpg', 'gif', 'map', // defaults
      'ico', 'svg', 'woff', 'woff2', 'ogg' // added by us
    ],
    exclude: [
      'assets/inline_svg/**/*',
      'assets/dynamic/*'
    ]
  },
  sourcemaps: {
    enabled: true,
  },
  'ember-cli-terser': {
    enabled: true,
    terser: {
      compress: false,
      mangle: true
    }
  }
}

We're also seeing a few bugs in 4.0.1 and 4.0.2 and are reverting back to 3.0.0 for that reason. Either the prepended path was missing or it was concatenated incorrectly.

ESBuild had the same issue here: NullVoxPopuli#61
and I'm testing out moving broccoli-asset-rev to addon.before right now.

Seeing the same issue here on v4.0.2. Downgrading to v4.0.1 works for me!

Sourcemaps referenced as to a relative path //# sourceMappingURL=app-872148ced72309772aa624ced3dfb68b.map instead of absolute //# sourceMappingURL=https://s3-eu-central-1.amazonaws.com/blabla/assets/app-872148ced72309772aa624ced3dfb68b.map.

Seems like wrong hash is being applied to .map files.

Console output ember build -prod

[TerserWriter][WARN] (broccoli-terser-sourcemap) "https://s3-eu-central-1.amazonaws.com/blabla/assets/app-a7d016737320d4b33763a690926b622f.map" referenced in "assets/app-872148ced72309772aa624ced3dfb68b.js" could not be found
[WARN] (broccoli-terser-sourcemap) "https://s3-eu-central-1.amazonaws.com/blabla/assets/vendor-859e1305b1dc366a97b803eec97b4df5.map" referenced in "assets/vendor-b3eeea38d69cb5b99f35ff8805ab60a3.js" could not be found

Configuration

    fingerprint: {
      enabled: true,
      extensions: [
        "pdf",
        "js",
        "css",
        "png",
        "jpg",
        "gif",
        "map",
        "otf",
        "eot",
        "svg",
        "ttf",
        "woff",
        "woff2",
      ],
      prepend: "https://s3-eu-central-1.amazonaws.com/blabla/",
    },

    sourcemaps: {
      enabled: true,
      extensions: ["js"],
    },

Dist folder contents

• app-872148ced72309772aa624ced3dfb68b.js
• app-872148ced72309772aa624ced3dfb68b.map
• vendor-4d134e6c58b511425ff083b735069361.css
• vendor-b3eeea38d69cb5b99f35ff8805ab60a3.js
• vendor-b3eeea38d69cb5b99f35ff8805ab60a3.map

Using prepend results in Unexpected token punc «:», expected punc «,» even with sourcemaps disabled, it also results in lots of warnings like this:

[TerserWriter][WARN] (broccoli-terser-sourcemap) "<<CDN URL>>/assets/leaflet/leaflet-4eaa81e6e27a89ed2410a7c39048a397.js.map" referenced in "assets/leaflet/leaflet-4eaa81e6e27a89ed2410a7c39048a397.js" could not be found

Any update on this issue or how to work around it in the meantime? I'm also running into the error

[WARN] (broccoli-terser-sourcemap) "https://my.cdn.com/assets/web-859e1305b1dc366a97b803eec97b4df5.map" referenced in "assets/web-b3eeea38d69cb5b99f35ff8805ab60a3.js" could not be found

Does the problem still exist if broccoli-terser-sourcemap is upgraded to 4.1.1 in your lockfile?

@NullVoxPopuli the warning still exists when running ember-cli-terser@4.0.2 & broccoli-terser-sourcemap@4.1.1

Downgrading to ember-cli-terser@4.0.1 while still keeping broccoli-terser-sourcemap@4.1.1 makes the warning go away. But I then run into the issue @apellerano-pw mentioned #275 (comment)

This came back to bite us a second time - painful!