While running sdf2usd URDF parser throws an error if the input file is named "model.sdf"

[joshuacv]

While trying to convert an sdf file, I came across this problem that if the model is named model.sdf, the gz-usdf throws this an error. The error seems to be coming from the urdf parser (I dont see a reason why the urdf parser is called for parsing the sdf file)

Environment

• OS Version: Ubuntu 20.04
• Source build: Main branch and looks like commit number is 6fb572b

Description

• Expected behavior: convert .sdf files to .usd files
• Actual behavior: An error is thrown (details below)

Steps to reproduce

• Follow the steps in Error while building 'UsdGeomMesh’ has no member named ‘CreatePrimvar’ #6 to install gz-usd using the relevant USD branch
• Test if sdf2usd works
  • navigate to the test/sdf folder in gz-usd
  • sdf2usd basic_shapes.sdf basic_shapes.usda
  • This should work
• Rename the basic_shapes file to model.sdf
• Run the coverter using sdf2usd model.sdf model.udsa ->should produce this error

Output

Error: Could not find the 'robot' element in the xml file
at line 109 in /build/urdfdom-VnCcob/urdfdom-1.0.4+ds/urdf_parser/src/model.cpp
Errors encountered:
Error Code 1: Msg: Unable to read file:model.sdf

Other details

• sdfformat version is sdfformat12 (was built from source)
• usd release branch (1c2b097a48edd78abeffb0e7b4c8adfec4d14060) - built from source