[frontend server, ddc] Difference between source maps created on MacOS and Windows #49277
Description
I have a simple web project with a web/main.dart file in the project directory. Compiling the project with frontend server generates different source maps on MacOS and Windows:
MacOS: "sources":["main.dart"]
Windows: "sources":["../../web/main.dart"]
(see details below).
Only the main.dart seems to be affected in the source maps so I suspect it is due to the Uri used for compilation command sent to the frontend server:
compile org-dartlang-app:///web/main.dart
Note: This breaks frontend server tests on windows in the current version of dwds, and potentially in flutter tools as well (after update to the current dwds version, for scenarios where users change the app's base in index.html)
Details
MacOS
Command
/Users/annagrin/.dart-sdks/2.18.0-189.0.dev/bin/snapshots/frontend_server.dart.snapshot --sdk-root /Users/annagrin/.dart-sdks/2.18.0-189.0.dev --incremental --target=dartdevc -Ddart.developer.causal_async_stacks=true --output-dill "/var/folders/gf/lqp6vjc55k1c8q0bwhjd8dg800p2zc/T/foo barnZ4tPZ/app.dill" --packages /Users/annagrin/source/webdev/fixtures/_testPackage/.dart_tool/package_config.json --filesystem-root file:///Users/annagrin/source/webdev/fixtures/_testPackage --filesystem-scheme org-dartlang-app --platform file:///Users/annagrin/.dart-sdks/2.18.0-189.0.dev/lib/_internal/ddc_sdk.dill --debugger-module-names --experimental-emit-debug-metadata --verbose
compile org-dartlang-app:///web/main.dart
Source map
{"version":3,"sourceRoot":"","sources":["main.dart"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AAkIuB,YAAS,UAAP;IAAO;;;IAHf;;EAAO;;;;;;;;;;;;;;;;;;;AAWD,YAAS,UAAP;IAAO;;;IAHX;;EAAO;;;;;;;;;;;;;;;;;;;IAUP;;AAGE,YAAS,UAAP;IAAO;;;IALT;;EAAO;;;;;;;;;;;;;;;;;;;;AAaP,YAAS,UAAP;IAAO;;;IAHV;;EAAO;;;;;;;;;;;;;;;;AAzIrB,cAAU;AACd,UAAO,IAAG;EACZ;;AAHI;EAGJ;;AAII,gBAAQ;AAMV,IAJI,oCAAqC,QAAC;AACb,MAA7B,WAAM,AAAsB,wBAAP,QAAF,AAAE,KAAK,GAAP;AACI,MAAvB,WAAM;AACqB,MAA3B,WAAM;;AAiBN,IAbI,oCAAqC,QAAC;AAC9B,MAAZ;AAC4B,MAA5B;AACgC,MAAhC;AACgB,MAAhB;AACa,MAAb;AACsB,MAAtB;AAC0B,MAA1B;AACsB,MAAtB;AACoB,MAApB;AACmB,MAAnB;AACsB,MAAtB;AAC6B,MAA7B;;AAG8D,IAAhE,AAAS,AAAK,gCAAW,oBAAY,WAAW;EAClD;;AAGM,gBAAQ;AACa,IAAzB,WAAM,AAAkB,wBAAN,KAAK;EACzB;;AAGM,mBAAW,sCAAiB,GAAG;AACjB,IAAlB,WAAiB,SAAT,QAAQ;EAClB;;AAGM,mBAAW,0CAAqB,GAAG;AACrB,IAAlB,WAAiB,SAAT,QAAQ;EAClB;;AAGM,mBAAW,uBAAU;AACP,IAAlB,WAAiB,SAAT,QAAQ;EAClB;;AAGyB,IAAvB,WAAM;EACR;;AAGuC,IAArC,WAAM,oBAAY,SAAS;EAC7B;;AAGM,gBAAQ;AACqB,IAAjC,WAAM,iCAAoB,KAAK;EACjC;;AAGM,gBAAQ;AACyB,IAArC,WAAM,qCAAwB,KAAK;EACrC;;AAGM,gBAAQ;AACW,IAAvB,WAAY,+BAAN,KAAK;EACb;;AAGM,eAAe,yBAAC;AACpB,aAAS,OAAQ,KAAI;AACR,MAAX,WAAM,IAAI;;EAEd;;AAE0B;AACF,MAApB;;IACJ;;;AAMY,IAHV,0BACI,4BACI,2BAAc;EAExB;;;AAMG,IAHD,sCACE;AACI;;;EAER;4DAEyC;AAC/B,IAAR,WAAM,CAAC;EACT;;AAGE,UAAO,8BAAgB;EACzB","file":"main.dart.lib.js"}{"version":3,"sourceRoot":"","sources":["test_library.dart","src/test_part.dart"],"names":[],"mappings":";;;;;;;;;;;;;;;;IAaY;;;;;;;;;;AAOW,YAAA,AAAgC,sBAAvB,cAAK,wBAAW;IAAO;;gDAL/B,OAAY;IAAZ;IAAY;AACb,IAAnB,WAAM;EACR;;;;;;;;;;;;;;;;;ICJU;;;;;;;;;;AAQW,YAAA,AAAgC,sBAAvB,cAAK,wBAAW;IAAO;;oDAL3B,OAAY;IAAZ;IAAY;AACjB,IAAnB,WAAM;EACR;;;;;;;;;;;;;;;0EAV8B;AAC9B,UAAO,OAAM;EACf;kEDF4B;AAC1B,UAAO,OAAM;EACf;;MAJI,6BAAgB;YAAG;;;MCAnB,iCAAoB;YAAG","file":"../../../../../../../packages/_test_package/test_library.dart.lib.js"}{"version":3,"sourceRoot":"","sources":["library.dart"],"names":[],"mappings":";;;;;;;;;;;6CAS0B,GAAU;AAClC,UAAa,UAAJ,CAAC,aAAC,CAAC;EACd;;MAJI,iBAAS;YAAG","file":"../../../../../../../packages/_test/library.dart.lib.js"}{"version":3,"sourceRoot":"","sources":["deferred_library.dart"],"names":[],"mappings":";;;;;;;;;;;;AAQsC,IAApC,WAAM;EACR","file":"../../../../../../../packages/_test/deferred_library.dart.lib.js"}
Windows
Command
C:\tools\dart-sdk\bin\snapshots\frontend_server.dart.snapshot --sdk-root C:\tools\dart-sdk --incremental --target=dartdevc -Ddart.developer.causal_async_stacks=true --output-dill "C:\Users\anna_\AppData\Local\Temp\foo bar311fe770\app.dill" --packages file:///C:/Users/anna_/src/webdev/fixtures/_testPackage/.dart_tool/package_config.json --filesystem-root file:///C:/Users/anna_/src/webdev/fixtures/_testPackage --filesystem-scheme org-dartlang-app --platform file:///C:/tools/dart-sdk/lib/_internal/ddc_sdk.dill --debugger-module-names --experimental-emit-debug-metadata --verbose
compile org-dartlang-app:///web/main.dart
Source map
{"version":3,"sourceRoot":"","sources":["../../web/main.dart"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;AAkIuB,YAAS,UAAP;IAAO;;;IAHf;;EAAO;;;;;;;;;;;;;;;;;;;AAWD,YAAS,UAAP;IAAO;;;IAHX;;EAAO;;;;;;;;;;;;;;;;;;;IAUP;;AAGE,YAAS,UAAP;IAAO;;;IALT;;EAAO;;;;;;;;;;;;;;;;;;;;AAaP,YAAS,UAAP;IAAO;;;IAHV;;EAAO;;;;;;;;;;;;;;;;AAzIrB,cAAU;AACd,UAAO,IAAG;EACZ;;AAHI;EAGJ;;AAII,gBAAQ;AAMV,IAJI,oCAAqC,QAAC;AACb,MAA7B,WAAM,AAAsB,wBAAP,QAAF,AAAE,KAAK,GAAP;AACI,MAAvB,WAAM;AACqB,MAA3B,WAAM;;AAiBN,IAbI,oCAAqC,QAAC;AAC9B,MAAZ;AAC4B,MAA5B;AACgC,MAAhC;AACgB,MAAhB;AACa,MAAb;AACsB,MAAtB;AAC0B,MAA1B;AACsB,MAAtB;AACoB,MAApB;AACmB,MAAnB;AACsB,MAAtB;AAC6B,MAA7B;;AAG8D,IAAhE,AAAS,AAAK,gCAAW,oBAAY,WAAW;EAClD;;AAGM,gBAAQ;AACa,IAAzB,WAAM,AAAkB,wBAAN,KAAK;EACzB;;AAGM,mBAAW,sCAAiB,GAAG;AACjB,IAAlB,WAAiB,SAAT,QAAQ;EAClB;;AAGM,mBAAW,0CAAqB,GAAG;AACrB,IAAlB,WAAiB,SAAT,QAAQ;EAClB;;AAGM,mBAAW,uBAAU;AACP,IAAlB,WAAiB,SAAT,QAAQ;EAClB;;AAGyB,IAAvB,WAAM;EACR;;AAGuC,IAArC,WAAM,oBAAY,SAAS;EAC7B;;AAGM,gBAAQ;AACqB,IAAjC,WAAM,iCAAoB,KAAK;EACjC;;AAGM,gBAAQ;AACyB,IAArC,WAAM,qCAAwB,KAAK;EACrC;;AAGM,gBAAQ;AACW,IAAvB,WAAY,+BAAN,KAAK;EACb;;AAGM,eAAe,yBAAC;AACpB,aAAS,OAAQ,KAAI;AACR,MAAX,WAAM,IAAI;;EAEd;;AAE0B;AACF,MAApB;;IACJ;;;AAMY,IAHV,0BACI,4BACI,2BAAc;EAExB;;;AAMG,IAHD,sCACE;AACI;;;EAER;4DAEyC;AAC/B,IAAR,WAAM,CAAC;EACT;;AAGE,UAAO,8BAAgB;EACzB","file":"main.dart.lib.js"}{"version":3,"sourceRoot":"","sources":["test_library.dart","src/test_part.dart"],"names":[],"mappings":";;;;;;;;;;;;;;;;IAaY;;;;;;;;;;AAOW,YAAA,AAAgC,sBAAvB,cAAK,wBAAW;IAAO;;gDAL/B,OAAY;IAAZ;IAAY;AACb,IAAnB,WAAM;EACR;;;;;;;;;;;;;;;;;ICJU;;;;;;;;;;AAQW,YAAA,AAAgC,sBAAvB,cAAK,wBAAW;IAAO;;oDAL3B,OAAY;IAAZ;IAAY;AACjB,IAAnB,WAAM;EACR;;;;;;;;;;;;;;;0EAV8B;AAC9B,UAAO,OAAM;EACf;kEDF4B;AAC1B,UAAO,OAAM;EACf;;MAJI,6BAAgB;YAAG;;;MCAnB,iCAAoB;YAAG","file":"../../../../../../../packages/_test_package/test_library.dart.lib.js"}{"version":3,"sourceRoot":"","sources":["library.dart"],"names":[],"mappings":";;;;;;;;;;;6CAS0B,GAAU;AAClC,UAAa,UAAJ,CAAC,aAAC,CAAC;EACd;;MAJI,iBAAS;YAAG","file":"../../../../../../../packages/_test/library.dart.lib.js"}{"version":3,"sourceRoot":"","sources":["deferred_library.dart"],"names":[],"mappings":";;;;;;;;;;;;AAQsC,IAApC,WAAM;EACR","file":"../../../../../../../packages/_test/deferred_library.dart.lib.js"}