A tip for compling and installing mitsuba3 locally from git

[lynshwoo2022]

in case anyone new to github like me want to use the latest mitsuba3 which haven't be released on pypi yet. here's my experience on how to compile it from git :)

1. git clone xxx.git --recursive or download everything manually including ext files.
2. install packages required in pyproject.toml
3. cd /ext/drjit/->python setup.py build->python setup.py install
4. cd /ext/zlib/ -> chmod 777 -R configure -> ./configure ->make test ->make install
5. back to mitsuba3-mater/->python setup.py build ->python setup.py install

[njroussel]

Note that step 4) is only necessary on Windows.

[njroussel]

Let me clarify:

This local install process is not actively supported. At any point between version releases, the Mitsuba3 might be using a DrJit version that is not compatible with the latest PyPI release. Unfortunately, pip install ./mitsuba3 or python setup.py install will both try to use the latest DrJit release rather than compiling whatever commit the Mitsuba3 repository is pointing to.
Following the compilation instructions in the documentation is the preferred approach. Modifying the PATH/PYTHONPATH globally for your system should functionally be the same as if you had used pip install on the project.

[lynshwoo2022]

one more hint, if we want to install it under a specific conda virtual environment, we need to specify the directory for mitsuba like:

python setup.py install --prefix=/anaconda/envs/virtual_env_name/

[pekCs]

When I used python setup.py build,I failed to build it.As it follows:

FAILED: Release/python/mitsuba/init.pyi D:/mitsuba3/mitsuba3/_skbuild/win-amd64-3.8/cmake-build/Release/python/mitsuba/init.pyi
cmd.exe /C "cd /D D:\mitsuba3\mitsuba3_skbuild\win-amd64-3.8\cmake-build\src\python && "C:\Program Files\CMake\bin\cmake.exe" -E env PYTHONPATH=D:\mitsuba3\mitsuba3_skbuild\win-amd64-3.8\cmake-build\Release\python; D:/miniconda/python.exe -Xutf8 D:/mitsuba3/mitsuba3/src/python/../../resources/generate_stub_files.py D:/mitsuba3/mitsuba3/_skbuild/win-amd64-3.8/cmake-build/Release/python/mitsuba"
Exit code 0xc0000409

ninja: build stopped: subcommand failed.
Traceback (most recent call last):
File "D:\miniconda\lib\site-packages\skbuild\setuptools_wrap.py", line 674, in setup
cmkr.make(make_args, install_target=cmake_install_target, env=env)
File "D:\miniconda\lib\site-packages\skbuild\cmaker.py", line 697, in make
self.make_impl(clargs=clargs, config=config, source_dir=source_dir, install_target=install_target, env=env)
File "D:\miniconda\lib\site-packages\skbuild\cmaker.py", line 742, in make_impl
raise SKBuildError(msg)

An error occurred while building with CMake.
Command:
'C:\Program Files\CMake\bin\cmake.EXE' --build . --target install --config Release --
Install target:
install
Source directory:
D:\mitsuba3\mitsuba3
Working directory:
D:\mitsuba3\mitsuba3_skbuild\win-amd64-3.8\cmake-build
Please check the install target is valid and see CMake's output for more information.

How can I fix it?

[njroussel]

See the amended answer I provided above: #473 (comment)