the "source" returned by "originalPositionFor" is different with "sources" of sourceMap file

[kiwenlau]

I use "originalPositionFor" to get the original position.

    console.log(JSON.stringify(sourceMap.sources, null, 4));

    var smc = new SourceMap.SourceMapConsumer(sourceMap);
    var result = smc.originalPositionFor(
    {
        line: parseInt(lineNumber),
        column: parseInt(columnNumber)
    });

    console.log(result.source);

I print out the "sources" property of sourceMap and the "source" of "originalPosition" results, but they are different, making it hard for me to locate the exact "sourcesContent" of sourceMap.

sourceMap.sources:

[
    "webpack:///static/js/manifest.b7cf97680f7a50fa150f.js",
    "webpack:///webpack/bootstrap 67e184f9679733298d44"
]

result.source:

webpack:/webpack/bootstrap 67e184f9679733298d44

result.source misses "//", which is quite strange.

Any suggestion? Thx!

[tromey]

Source maps for webpack-built bundles are definitely working in Firefox. For example, this test uses one.

The best thing would be if you could make a (hopefully minimal) example showing the problem.

[kiwenlau]

Here is the Source Map file:(GitHub only support uploading .txt file...)
test.txt

The sources field of source map:

"sources": ["webpack:///static/js/manifest.b7cf97680f7a50fa150f.js","webpack:///webpack/bootstrap 67e184f9679733298d44"],

Here is the code:

const sourceMap = require('source-map');

const fs = require('fs');
const rawSourceMap = JSON.parse(fs.readFileSync('./test.txt', 'utf8'));

const smc = new sourceMap.SourceMapConsumer(rawSourceMap);

console.log(smc.originalPositionFor({
  line: 1,
  column: 100
}));

Here is the output:

{ source: 'webpack:/webpack/bootstrap 67e184f9679733298d44',
  line: 52,
  column: 0,
  name: 'call' }

You can see that the "source" returned by "originalPositionFor" is different with "sources" of sourceMap file

Thx!

[kiwenlau]

I found exactly the same problem again! @tromey

here is the sourcemap file: test02.txt

The sources field of source map:

"webpack:///./src/components/ajax/ajax.js"

Here is the code:

const sourceMap = require('source-map');

const fs = require('fs');
const rawSourceMap = JSON.parse(fs.readFileSync('./test02.txt', 'utf8'));

const smc = new sourceMap.SourceMapConsumer(rawSourceMap);

console.log(smc.originalPositionFor({
  line: 1,
  column: 15545
}));

Here is the output:

{ source: 'webpack:///src/components/ajax/ajax.js',
  line: 14,
  column: 23,
  name: 'data' }

[tromey]

I would mildly expect the /// to be transformed to // by source-map's URL normalization; but I definitely am seeing it transform to /, which seems quite wrong.

[tromey]

The built-in URL parser can't parse that URL, which is probably the problem. Would be fixed by using the standard URL, see #275

[tromey]

{ source: 'webpack:///src/components/ajax/ajax.js',

This one isn't really a bug. The source-map library does some normalization.