Add source map files to builds

[necrolyte2]

Related to:

• chore: inline sources in source maps opentelemetry-js#2488
• Source maps present in published package, but source is missing, causing webpack to warn on source-map-loader plugin opentelemetry-js#1887

Looking to remove all of the warnings about missing source maps

[codecov]

Codecov Report

Merging #134 (80d1f8d) into main (35582a7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #134   +/-   ##
=======================================
  Coverage   94.46%   94.46%           
=======================================
  Files          42       42           
  Lines         578      578           
  Branches       94       94           
=======================================
  Hits          546      546           
  Misses         32       32           

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[vmarchaud]

I'm not sure but i think we discussed this before, relating to the size of the bundle that we publish, could you compare before/after ?

[necrolyte2]

Hopefully this is correct

rm -rf build
npm run compile

# Generate All files
du -hs build/*

# Generate only specific files
find build/esm \( -name '*.js' -o -name '*.js.map' -o -name '*.d.ts' \) -exec du -ch {} +
find build/src \( -name '*.js' -o -name '*.js.map' -o -name '*.d.ts' \) -exec du -ch {} +

ESM

Tool	Before	After
All files	856K	900K
Only js, js.map, d.ts	628K	672K

CommonJS

Tool	Before	After
All Files	840K	884K
Only js, js.map, d.ts	632K	676K

NPM Pack(npm pack)

Size Type	Before	After
Packed	58.1kB	81.1 kB
Unpacked	377 kB	595.6 kB

[vmarchaud]

cc @MSNev i'm not that familiar with the browser tooling, do you find it acceptable ?