Empty outputs/files (on platform) errors

[jakirkham]

Checklist

• I added a descriptive title
• I searched open reports and couldn't find a duplicate

What happened?

Created a recipe like the one below. Then ran the build on platform where files would be empty (due to the selector). In my case macOS, but it could be Linux. Also one could change the selector to anything that is not the platform where the build occurs

# filename: recipe/meta.yaml
package:
  name: foo
  version: 1

outputs:
  - name: bar
    files:
      - script.bat  # [win]

---

When running the build from recipe (though changing the cwd has no effect), had the following output:

$  conda build .         
No numpy version specified in conda_build_config.yaml.  Falling back to default numpy value of 1.21
WARNING:conda_build.metadata:No numpy version specified in conda_build_config.yaml.  Falling back to default numpy value of 1.21
Adding in variants from internal_defaults
INFO:conda_build.variants:Adding in variants from internal_defaults
Attempting to finalize metadata for bar
INFO:conda_build.metadata:Attempting to finalize metadata for bar
BUILD START: ['bar-1-0.tar.bz2']
source tree in: /Users/jkirkham/miniforge/conda-bld/foo_1692310622051/work
Packaging bar
INFO:conda_build.build:Packaging bar
Traceback (most recent call last):
  File "/Users/jkirkham/miniforge/bin/conda-build", line 11, in <module>
    sys.exit(main())
  File "/Users/jkirkham/miniforge/lib/python3.10/site-packages/conda_build/cli/main_build.py", line 495, in main
    execute(sys.argv[1:])
  File "/Users/jkirkham/miniforge/lib/python3.10/site-packages/conda_build/cli/main_build.py", line 475, in execute
    outputs = api.build(
  File "/Users/jkirkham/miniforge/lib/python3.10/site-packages/conda_build/api.py", line 180, in build
    return build_tree(
  File "/Users/jkirkham/miniforge/lib/python3.10/site-packages/conda_build/build.py", line 3078, in build_tree
    packages_from_this = build(metadata, stats,
  File "/Users/jkirkham/miniforge/lib/python3.10/site-packages/conda_build/build.py", line 2337, in build
    for f in output_d.get('files', []):
TypeError: 'NoneType' object is not iterable

Conda Info

active environment : base
    active env location : /Users/jkirkham/miniforge
            shell level : 5
       user config file : /Users/jkirkham/.condarc
 populated config files : /Users/jkirkham/miniforge/.condarc
                          /Users/jkirkham/.condarc
          conda version : 23.7.2
    conda-build version : 3.24.0
         python version : 3.10.12.final.0
       virtual packages : __archspec=1=arm64
                          __osx=13.4.1=0
                          __unix=0=0
       base environment : /Users/jkirkham/miniforge  (writable)
      conda av data dir : /Users/jkirkham/miniforge/etc/conda
  conda av metadata url : None
           channel URLs : https://conda.anaconda.org/conda-forge/osx-arm64
                          https://conda.anaconda.org/conda-forge/noarch
          package cache : /Users/jkirkham/miniforge/pkgs
                          /Users/jkirkham/.conda/pkgs
       envs directories : /Users/jkirkham/miniforge/envs
                          /Users/jkirkham/.conda/envs
               platform : osx-arm64
             user-agent : conda/23.7.2 requests/2.31.0 CPython/3.10.12 Darwin/22.5.0 OSX/13.4.1 solver/libmamba conda-libmamba-solver/23.7.0 libmambapy/1.4.9
                UID:GID : 502:20
             netrc file : None
           offline mode : False

Conda Config

==> /Users/jkirkham/miniforge/.condarc <==
channels:
  - conda-forge

==> /Users/jkirkham/.condarc <==
channels:
  - conda-forge
solver: libmamba

==> cmd_line <==
debug: False
json: False

Conda list

# packages in environment at /Users/jkirkham/miniforge:
#
# Name                    Version                   Build  Channel
anaconda-client           1.11.2             pyhd8ed1ab_0    conda-forge
anaconda-project          0.11.1             pyhd8ed1ab_0    conda-forge
anyio                     3.7.0              pyhd8ed1ab_1    conda-forge
appnope                   0.1.3              pyhd8ed1ab_0    conda-forge
asttokens                 2.2.1              pyhd8ed1ab_0    conda-forge
attrs                     23.1.0             pyh71513ae_1    conda-forge
backcall                  0.2.0              pyh9f0ad1d_0    conda-forge
backports                 1.0                pyhd8ed1ab_3    conda-forge
backports.functools_lru_cache 1.6.4              pyhd8ed1ab_0    conda-forge
beautifulsoup4            4.12.2             pyha770c72_0    conda-forge
blinker                   1.6.2              pyhd8ed1ab_0    conda-forge
boa                       0.14.0             pyhd8ed1ab_4    conda-forge
boltons                   23.0.0             pyhd8ed1ab_0    conda-forge
boolean.py                4.0                pyhd8ed1ab_0    conda-forge
brotli                    1.0.9                h1a8c8d9_9    conda-forge
brotli-bin                1.0.9                h1a8c8d9_9    conda-forge
brotli-python             1.0.9           py310h0f1eb42_9    conda-forge
brotlipy                  0.7.0           py310h8e9501a_1005    conda-forge
bzip2                     1.0.8                h3422bc3_4    conda-forge
c-ares                    1.19.1               hb547adb_0    conda-forge
ca-certificates           2023.7.22            hf0a4a13_0    conda-forge
cctools                   973.0.1             h4faf515_13    conda-forge
cctools_osx-arm64         973.0.1             h7a0f565_13    conda-forge
certifi                   2023.7.22          pyhd8ed1ab_0    conda-forge
cffi                      1.15.1          py310h2399d43_3    conda-forge
chardet                   5.1.0           py310hbe9552e_0    conda-forge
charset-normalizer        3.2.0              pyhd8ed1ab_0    conda-forge
clyent                    1.2.2                      py_1    conda-forge
colorama                  0.4.6              pyhd8ed1ab_0    conda-forge
conda                     23.7.2          py310hbe9552e_0    conda-forge
conda-build               3.24.0          py310hbe9552e_1    conda-forge
conda-forge-pinning       2023.08.17.00.09.34      hd8ed1ab_0    conda-forge
conda-libmamba-solver     23.7.0             pyhd8ed1ab_0    conda-forge
conda-pack                0.7.0              pyh6c4a22f_0    conda-forge
conda-package-handling    2.2.0              pyh38be061_0    conda-forge
conda-package-streaming   0.9.0              pyhd8ed1ab_0    conda-forge
conda-smithy              3.24.1                   pypi_0    pypi
conda-souschef            2.2.3              pyhd8ed1ab_0    conda-forge
cryptography              41.0.3          py310hdd3b5e7_0    conda-forge
curl                      8.1.2                h912dcd9_0    conda-forge
dataclasses               0.8                pyhc8e2a94_3    conda-forge
decorator                 5.1.1              pyhd8ed1ab_0    conda-forge
defusedxml                0.7.1              pyhd8ed1ab_0    conda-forge
deprecated                1.2.14             pyh1a96a4e_0    conda-forge
exceptiongroup            1.1.1              pyhd8ed1ab_0    conda-forge
executing                 1.2.0              pyhd8ed1ab_0    conda-forge
expat                     2.5.0                hb7217d7_1    conda-forge
filelock                  3.12.0             pyhd8ed1ab_0    conda-forge
fmt                       9.1.0                hffc8910_0    conda-forge
freetype                  2.12.1               hd633e50_1    conda-forge
gettext                   0.21.1               h0186832_0    conda-forge
git                       2.41.0          pl5321h46e2b6d_0    conda-forge
gitdb                     4.0.10             pyhd8ed1ab_0    conda-forge
gitpython                 3.1.31             pyhd8ed1ab_0    conda-forge
glob2                     0.7                        py_0    conda-forge
gmp                       6.2.1                h9f76cd9_0    conda-forge
grayskull                 2.2.2.dev1+gac11dca          pypi_0    pypi
icu                       72.1                 he12128b_0    conda-forge
idna                      3.4                pyhd8ed1ab_0    conda-forge
importlib-metadata        6.6.0              pyha770c72_0    conda-forge
importlib_resources       5.12.0             pyhd8ed1ab_0    conda-forge
ipython                   8.14.0             pyhd1c38e8_0    conda-forge
isodate                   0.6.1              pyhd8ed1ab_0    conda-forge
jedi                      0.18.2             pyhd8ed1ab_0    conda-forge
jinja2                    3.1.2              pyhd8ed1ab_1    conda-forge
joblib                    1.2.0              pyhd8ed1ab_0    conda-forge
json5                     0.9.5              pyh9f0ad1d_0    conda-forge
jsonpatch                 1.32               pyhd8ed1ab_0    conda-forge
jsonpointer               2.0                        py_0    conda-forge
jsonschema                4.17.3             pyhd8ed1ab_0    conda-forge
jupyter_core              5.3.0           py310hbe9552e_0    conda-forge
krb5                      1.20.1               h69eda48_0    conda-forge
lcms2                     2.15                 hd835a16_1    conda-forge
ld64                      609                 h634c8be_13    conda-forge
ld64_osx-arm64            609                 h297e91e_13    conda-forge
lerc                      4.0.0                h9a09cb3_0    conda-forge
libarchive                3.6.2                h82b9b87_1    conda-forge
libblas                   3.9.0           16_osxarm64_openblas    conda-forge
libbrotlicommon           1.0.9                h1a8c8d9_9    conda-forge
libbrotlidec              1.0.9                h1a8c8d9_9    conda-forge
libbrotlienc              1.0.9                h1a8c8d9_9    conda-forge
libcblas                  3.9.0           16_osxarm64_openblas    conda-forge
libcurl                   8.1.2                h912dcd9_0    conda-forge
libcxx                    16.0.6               h4653b0c_0    conda-forge
libdeflate                1.18                 h1a8c8d9_0    conda-forge
libedit                   3.1.20191231         hc8eb9b7_2    conda-forge
libev                     4.33                 h642e427_1    conda-forge
libexpat                  2.5.0                hb7217d7_1    conda-forge
libffi                    3.4.2                h3422bc3_5    conda-forge
libgfortran               5.0.0           12_2_0_hd922786_31    conda-forge
libgfortran5              12.2.0              h0eea778_31    conda-forge
libiconv                  1.17                 he4db4b2_0    conda-forge
libjpeg-turbo             2.1.5.1              h1a8c8d9_0    conda-forge
liblapack                 3.9.0           16_osxarm64_openblas    conda-forge
liblief                   0.12.3               hb7217d7_0    conda-forge
libllvm14                 14.0.6               hd1a9a77_2    conda-forge
libllvm16                 16.0.4               he79909e_0    conda-forge
libmamba                  1.4.9                h4fa9c85_0    conda-forge
libmambapy                1.4.9           py310hb7070d9_0    conda-forge
libnghttp2                1.52.0               hae82a92_0    conda-forge
libopenblas               0.3.21          openmp_hc731615_3    conda-forge
libpng                    1.6.39               h76d750c_0    conda-forge
libsodium                 1.0.18               h27ca646_1    conda-forge
libsolv                   0.7.24               ha614eb4_1    conda-forge
libsqlite                 3.42.0               hb31c410_0    conda-forge
libssh2                   1.10.0               h7a5bd25_3    conda-forge
libtiff                   4.5.0                h4f7d55c_6    conda-forge
libwebp-base              1.3.0                h1a8c8d9_0    conda-forge
libxcb                    1.15                 hf346824_0    conda-forge
libxml2                   2.11.4               he3bdae6_0    conda-forge
libzlib                   1.2.13               h53f4e23_5    conda-forge
license-expression        30.1.1             pyhd8ed1ab_0    conda-forge
llvm-openmp               16.0.4               h1c12783_0    conda-forge
lz4-c                     1.9.4                hb7217d7_0    conda-forge
lzo                       2.10              h642e427_1000    conda-forge
mamba                     1.4.9           py310ha5d4528_0    conda-forge
markdown-it-py            2.2.0              pyhd8ed1ab_0    conda-forge
markupsafe                2.1.2           py310h8e9501a_0    conda-forge
matplotlib-inline         0.1.6              pyhd8ed1ab_0    conda-forge
mdurl                     0.1.0              pyhd8ed1ab_0    conda-forge
msrest                    0.6.21             pyh44b312d_0    conda-forge
nbformat                  5.9.0              pyhd8ed1ab_0    conda-forge
ncurses                   6.4                  h7ea286d_0    conda-forge
numpy                     1.24.3          py310haa1e00c_0    conda-forge
oauthlib                  3.2.2              pyhd8ed1ab_0    conda-forge
openjpeg                  2.5.0                hbc2ba62_2    conda-forge
openssl                   3.1.2                h53f4e23_0    conda-forge
packaging                 23.1               pyhd8ed1ab_0    conda-forge
parso                     0.8.3              pyhd8ed1ab_0    conda-forge
patch                     2.7.6             h27ca646_1002    conda-forge
pcre2                     10.40                hb34f9b4_0    conda-forge
perl                      5.32.1          2_h9b22ae9_perl5    conda-forge
pexpect                   4.8.0              pyh1a96a4e_2    conda-forge
pickleshare               0.7.5                   py_1003    conda-forge
pillow                    9.5.0           py310h60ecbdf_1    conda-forge
pip                       23.2.1             pyhd8ed1ab_0    conda-forge
pkginfo                   1.9.6              pyhd8ed1ab_0    conda-forge
pkgutil-resolve-name      1.3.10             pyhd8ed1ab_0    conda-forge
platformdirs              3.5.1              pyhd8ed1ab_0    conda-forge
pluggy                    1.2.0              pyhd8ed1ab_0    conda-forge
progressbar2              4.2.0              pyhd8ed1ab_0    conda-forge
prompt-toolkit            3.0.38             pyha770c72_0    conda-forge
prompt_toolkit            3.0.38               hd8ed1ab_0    conda-forge
psutil                    5.9.5           py310h8e9501a_0    conda-forge
pthread-stubs             0.4               h27ca646_1001    conda-forge
ptyprocess                0.7.0              pyhd3deb0d_0    conda-forge
pure_eval                 0.2.2              pyhd8ed1ab_0    conda-forge
py-lief                   0.12.3          py310h0f1eb42_0    conda-forge
pybind11-abi              4                    hd8ed1ab_3    conda-forge
pycosat                   0.6.4           py310h8e9501a_1    conda-forge
pycparser                 2.21               pyhd8ed1ab_0    conda-forge
pycryptodome              3.18.0          py310hd71b1c6_0    conda-forge
pygithub                  1.58.0             pyh1a96a4e_0    conda-forge
pygments                  2.15.1             pyhd8ed1ab_0    conda-forge
pyjwt                     2.7.0              pyhd8ed1ab_0    conda-forge
pynacl                    1.5.0           py310h8e9501a_2    conda-forge
pyopenssl                 23.2.0             pyhd8ed1ab_1    conda-forge
pyproject_hooks           1.0.0              pyhd8ed1ab_0    conda-forge
pyrsistent                0.19.3          py310h8e9501a_0    conda-forge
pysocks                   1.7.1              pyha2e5f31_6    conda-forge
python                    3.10.12         h01493a6_0_cpython    conda-forge
python-build              0.10.0             pyhd8ed1ab_1    conda-forge
python-dateutil           2.8.2              pyhd8ed1ab_0    conda-forge
python-fastjsonschema     2.17.1             pyhd8ed1ab_0    conda-forge
python-libarchive-c       4.0             py310hbe9552e_2    conda-forge
python-utils              3.5.2              pyhd8ed1ab_0    conda-forge
python_abi                3.10                    3_cp310    conda-forge
pytz                      2023.3             pyhd8ed1ab_0    conda-forge
pyyaml                    6.0             py310h8e9501a_5    conda-forge
rapidfuzz                 3.0.0           py310h0f1eb42_0    conda-forge
readline                  8.2                  h92ec313_1    conda-forge
reproc                    14.2.4               h1a8c8d9_0    conda-forge
reproc-cpp                14.2.4               hb7217d7_0    conda-forge
requests                  2.31.0             pyhd8ed1ab_0    conda-forge
requests-oauthlib         1.3.1              pyhd8ed1ab_0    conda-forge
requests-toolbelt         1.0.0              pyhd8ed1ab_0    conda-forge
rich                      13.3.5             pyhd8ed1ab_0    conda-forge
ripgrep                   13.0.0               h65448a5_2    conda-forge
ruamel.yaml               0.17.32         py310h2aa6e3c_0    conda-forge
ruamel.yaml.clib          0.2.7           py310h8e9501a_1    conda-forge
ruamel.yaml.jinja2        0.2.4                      py_1    conda-forge
ruamel_yaml               0.15.80         py310h8e9501a_1008    conda-forge
scrypt                    0.8.18          py310he37e910_4    conda-forge
setuptools                68.0.0             pyhd8ed1ab_0    conda-forge
shyaml                    0.6.2              pyhd3deb0d_0    conda-forge
sigtool                   0.1.3                h44b9a77_0    conda-forge
six                       1.16.0             pyh6c4a22f_0    conda-forge
smmap                     3.0.5              pyh44b312d_0    conda-forge
sniffio                   1.3.0              pyhd8ed1ab_0    conda-forge
soupsieve                 2.3.2.post1        pyhd8ed1ab_0    conda-forge
stack_data                0.6.2              pyhd8ed1ab_0    conda-forge
stdlib-list               0.8.0              pyhd8ed1ab_0    conda-forge
tapi                      1100.0.11            he4954df_0    conda-forge
tk                        8.6.12               he1e0b03_0    conda-forge
toml                      0.10.2             pyhd8ed1ab_0    conda-forge
tomli                     2.0.1              pyhd8ed1ab_0    conda-forge
tomli-w                   1.0.0              pyhd8ed1ab_0    conda-forge
toolz                     0.12.0             pyhd8ed1ab_0    conda-forge
tornado                   6.3.2           py310h2aa6e3c_0    conda-forge
tqdm                      4.66.1             pyhd8ed1ab_0    conda-forge
traitlets                 5.9.0              pyhd8ed1ab_0    conda-forge
typing-extensions         4.6.2                hd8ed1ab_0    conda-forge
typing_extensions         4.6.2              pyha770c72_0    conda-forge
tzdata                    2023c                h71feb2d_0    conda-forge
urllib3                   2.0.4              pyhd8ed1ab_0    conda-forge
vsts-python-api           0.1.25             pyhd8ed1ab_1    conda-forge
watchgod                  0.8.2              pyhd8ed1ab_0    conda-forge
wcwidth                   0.2.6              pyhd8ed1ab_0    conda-forge
wheel                     0.41.1             pyhd8ed1ab_0    conda-forge
wrapt                     1.15.0          py310h8e9501a_0    conda-forge
xorg-libxau               1.0.11               hb547adb_0    conda-forge
xorg-libxdmcp             1.1.3                h27ca646_0    conda-forge
xz                        5.2.6                h57fd34a_0    conda-forge
yaml                      0.2.5                h3422bc3_2    conda-forge
yaml-cpp                  0.7.0                hb7217d7_2    conda-forge
zipp                      3.15.0             pyhd8ed1ab_0    conda-forge
zstandard                 0.19.0          py310h07fcf8c_2    conda-forge
zstd                      1.5.2                h4f39d0f_7    conda-forge

Additional Context

Started PR ( #4971 ) to try tweak the relevant lines. Though this may also be better handled as part of metadata parsing

[github-actions]

Hi there, thank you for your contribution!

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