BUG: Pipe-separated package match specs produce InvalidMatchSpec

[robert-schmidtke]

Hi, I recently switched from conda/mamba/boa to rattler-build and found that using pipes | in package match specifications produce a final package that cannot be installed using conda or mamba.

package:
  name: rattler-build-test
  version: 0.1.0

source:
  path: ..

build:
  number: 1
  noarch: python
  script: python -m pip install . --no-deps -vv

requirements:
  host:
    - python >=3.10
    - pip >=24.2
    - setuptools >=46.1.0
    - setuptools_scm >=5

  run:
    - python >=3.10
    - pandas >=1.4,<1.5|>=2.2

When trying to install the .conda package that is produced by rattler-build build --recipe ./recipe/recipe.yaml, I see an InvalidMatchSpec:

$ mamba install -n rattler-build-test output/noarch/rattler-build-test-0.1.0-pyh4616a5c_1.conda
$ mamba list -n rattler-build-test
Invalid spec 'pandas (>=1.4,<1.5)|>=2.2': Invalid version '|>=2.2': cannot join single expression

InvalidMatchSpec: Invalid spec 'pandas (>=1.4,<1.5)|>=2.2': Invalid version '|>=2.2': cannot join single expression

I see this spec in both the rattler-build output and the final index.json file:

 │ │ Run dependencies:
 │ │ ╭──────────────────┬────────────────────────╮
 │ │ │ Name             ┆ Spec                   │
 │ │ ╞══════════════════╪════════════════════════╡
 │ │ │ Run dependencies ┆                        │
 │ │ │ python           ┆ >=3.10                 │
 │ │ │ pandas           ┆ (>=1.4,<1.5)|>=2.2     │
 │ │ │ python           ┆ (RE of [host: python]) │
 │ │ ╰──────────────────┴────────────────────────╯

When I drop the pipe from the spec, the final package is working fine.

    - pandas >=1.4,<1.5

 │ │ Run dependencies:
 │ │ ╭──────────────────┬────────────────────────╮
 │ │ │ Name             ┆ Spec                   │
 │ │ ╞══════════════════╪════════════════════════╡
 │ │ │ Run dependencies ┆                        │
 │ │ │ python           ┆ >=3.10                 │
 │ │ │ pandas           ┆ >=1.4,<1.5             │
 │ │ │ python           ┆ (RE of [host: python]) │
 │ │ ╰──────────────────┴────────────────────────╯

$ mamba install -n rattler-build-test output/noarch/rattler-build-test-0.2.0-pyh4616a5c_1.conda
$ conda list -n rattler-build-test
# packages in environment at /home/rschmidtke/miniforge3/envs/rattler-build-test:
#
# Name                    Version                   Build  Channel
_libgcc_mutex             0.1                 conda_forge    conda-forge
_openmp_mutex             4.5                       2_gnu    conda-forge
bzip2                     1.0.8                h4bc722e_7    conda-forge
ca-certificates           2024.8.30            hbcca054_0    conda-forge
ld_impl_linux-64          2.40                 hf3520f5_7    conda-forge
libffi                    3.4.2                h7f98852_5    conda-forge
libgcc                    14.1.0               h77fa898_1    conda-forge
libgcc-ng                 14.1.0               h69a702a_1    conda-forge
libgomp                   14.1.0               h77fa898_1    conda-forge
libnsl                    2.0.1                hd590300_0    conda-forge
libsqlite                 3.46.1               hadc24fc_0    conda-forge
libuuid                   2.38.1               h0b41bf4_0    conda-forge
libxcrypt                 4.4.36               hd590300_1    conda-forge
libzlib                   1.3.1                h4ab18f5_1    conda-forge
ncurses                   6.5                  he02047a_1    conda-forge
openssl                   3.3.2                hb9d3cd8_0    conda-forge
pip                       24.2               pyh8b19718_1    conda-forge
python                    3.10.14         hd12c33a_0_cpython    conda-forge
rattler-build-test        0.2.0              pyh4616a5c_1    file:///home/rschmidtke/workspace/other/rattler-build-test/output
readline                  8.2                  h8228510_1    conda-forge
setuptools                73.0.1             pyhd8ed1ab_0    conda-forge
tk                        8.6.13          noxft_h4845f30_101    conda-forge
tzdata                    2024a                h8827d51_1    conda-forge
wheel                     0.44.0             pyhd8ed1ab_0    conda-forge
xz                        5.2.6                h166bdaf_0    conda-forge

Is there anything that I'm doing wrong for the package specification?

It seems to me that the parenthesized expression cannot be parsed by conda and mamba, so I wonder where it comes from and whether it's really necessary to have them, as the specs say that , takes precedence over | anyway: https://conda.io/projects/conda/en/latest/user-guide/concepts/pkg-specs.html#package-match-specifications

I have pushed an MVP here: https://github.com/robert-schmidtke/rattler-build-test

Many thanks for your great work!

[wolfv]

Hi @robert-schmidtke - excellent. Thanks a lot for the reproducer. That looks indeed like a bug when rendering the matchspec to text. I am taking a look!

[wolfv]

Sadly this seems to hit a bug in conda where MatchSpecs are removing anything between (..) round brackets for reasons that I don't fully understand.

We'll have to think on the best fix. For this case, it would indeed not be necessary to have brackets at all.

Filed a bug upstream as well: conda/conda#14242

And opened a PR in rattler to not print brackets we don't need: conda/rattler#861

[robert-schmidtke]

Thanks for the quick diagnosis @wolfv! I am going to upvote the upstream issue and stay tuned :)

[wolfv]

I am updating rattler so that this is fixed! :)

[wolfv]

Fixed with the next release, rattler bumped in #1066.

I'll try to make a release tomorrow! :)