The files that have "slash in the contents" are actually symbolic links.

On WSL, it is important to use Linux git (not some other git that may be on 
your system) with the exact options as instructed 
in 
https://github.com/sagemath/sage/blob/develop/README.md#instructions-to-build-from-source




On Monday, May 20, 2024 at 10:11:08 AM UTC-7 Chris Xu wrote:

> Hi,
>
> I'm attempting to build SageMath from source. I run Windows 10 WSL/Ubuntu 
> 20.04 and Python 3.10.8. I followed all of the instructions in the "Getting 
> Started" manual, including changing the PATH variable to what was 
> specified. What ends up happening in my installation when I run "make" is 
> that some of the packages in the "build" folder are using old-style SPKG's, 
> namely:
>
> build/pkgs/sage_conf
> build/pkgs/sage_docbuild
> build/pkgs/sage_setup
> build/pkgs/sage_sws2rst
> build/pkgs/sage_sagelib
> build/pkgs/sagemath_bliss
> build/pkgs/sagemath_categories
> build/pkgs/sagemath_coxeter3
> build/pkgs/sagemath_environment
> build/pkgs/sagemath_mcqd
> build/pkgs/sagemath_meataxe
> build/pkgs/sagemath_objects
> build/pkgs/sagemath_repl
> build/pkgs/sagemath_sirocco
> build/pkgs/sagemath_tdlib
> build/pkgs/pplpy_doc
>
> What is common to all of these directories is that "package-version.txt" 
> has a slash in the contents and is thus detected by the bash script 
> build/bin/sage-spkg as an old-style SPKG (line 297 "Error: Installing 
> old-style SPKGs is no longer supported"). Now you'd think that I could just 
> change the contents in each of the package-version.txt files into the one 
> that they reference (e.g. 0.8.9 for pplpy-doc), but this causes further 
> errors because old-style SPKGs are legitimately no longer supported. The 
> file "spkg-install.in" has a command "cd src", but under these old-style 
> SPKG's, there is no src file to cd into. (this is taking place inside 
> local/var/lib/venv-python3.10/var/tmp/sage/build/<pkgname>-<pkgversion>.) 
> Then further along it tries to install the package (e.g. with the command 
> sdh-install) but then I get an error saying that they cannot recognize the 
> folder as a Python object since is no "setup.py" or "pyproject.toml". This 
> isn't an issue with new-style SPKGs, since they download a tarball, which 
> then gives a /src/ subfolder, which has "setup.py" and/or "pyproject.toml". 
> (NOTE: for pplpy_doc, this is fine, the installation is just skipped, but 
> for the next folder in the build sequence, sage_conf, I run into this 
> error.) 
>
> I'd like to know if there is any fix to this mysterious error.
>
> Best,
> Chris

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