Current OR-Tools version not working with Gurobi 10

[RichardOberdieck]

What version of OR-Tools and what language are you using?
Version: main
Language: Python

Which solver are you using (e.g. CP-SAT, Routing Solver, GLOP, BOP, Gurobi)
Gurobi

What operating system (Linux, Windows, ...) and version?
Linux (in a docker container on a mac)

What did you do?
Consider the following Dockerfile:

FROM gurobi/optimizer:10.0.0

RUN pip install ortools

COPY test.py test.py
COPY gurobi.lic /opt/gurobi/gurobi.lic
RUN python test.py

The file test.py looks as follows:

from ortools.linear_solver import pywraplp


solver = pywraplp.Solver.CreateSolver('Gurobi')
infinity = solver.infinity()
# x and y are integer non-negative variables.
x = solver.IntVar(0.0, infinity, 'x')
y = solver.IntVar(0.0, infinity, 'y')
solver.Add(x + 7 * y <= 17.5)

# x <= 3.5.
solver.Add(x <= 3.5)
solver.Maximize(x + 10 * y)
status = solver.Solve()

The file gurobi.lic is the Gurobi license file.

What did you expect to see
That it runs without an exception.

What did you see instead?

If you run this with docker build -t test ., then the following exception is thrown:

WARNING: Logging before InitGoogleLogging() is written to STDERR
W1116 08:39:36.348453     7 linear_solver.cc:625] Support for Gurobi not linked in, or the license was not found.
Traceback (most recent call last):
  File "/opt/gurobi/linux64/test.py", line 5, in <module>
    infinity = solver.infinity()
AttributeError: 'NoneType' object has no attribute 'infinity'

However, if we change the image to gurobi/optimizer:9.5.2, then it works

[Mizux]

Must be here:

or-tools/ortools/gurobi/environment.cc

Lines 659 to 662 in 82750ac

	std::vector<std::string> GurobiDynamicLibraryPotentialPaths() {
	std::vector<std::string> potential_paths;
	const std::vector<std::string> kGurobiVersions = {
	"952", "951", "950", "911", "910", "903", "902", "811", "801", "752"};

@RichardOberdieck do you know the name of lib in the container ?
EDIT:

docker run --init --rm -it gurobi/optimizer:10.0.0 bash
root@9747f7bd3cd4:/opt/gurobi/linux64# find / -type f -iname "libgurobi*"
/opt/gurobi/linux64/lib/libgurobi_g++5.2.a
/opt/gurobi/linux64/lib/libgurobi.so.10.0.0
/opt/gurobi/linux64/lib/libgurobi_g++4.8.a
/opt/gurobi/linux64/lib/libGurobiJni100.so
/opt/gurobi/linux64/lib/libgurobi100_light.so

[RichardOberdieck]

/opt/gurobi/linux64/lib/libgurobi.so.10.0.0

[Mizux]

We are working on a fix on the main branch...

devNote:
Gurobi 10.0.0 installer

• MacOS (M1): /usr/local/lib/libgurobi100.dylib -> //Library/gurobi1000/macos_universal2/lib/libgurobi100.dylib
• windows: C:\gurobi1000\win64\lib\gurobi100.lib C:\gurobi1000\win64\bin\gurobi100.dll

[lperron]

Still, you can specify the full path to the library manually.

ortools.init.CppBridge.LoadGurobiSharedLibrary('full path to library')