Request that libgs.so or libgs.dylib (MacOS) be delivered in conda-forge Ghostscript

[jimhall]

Issue: Request that libgs.so or libgs.dylib (MacOS) be delivered in conda-forge Ghostscript

Details:

This is a request that conda-forge include a full distribution of Ghostscript rather than the truncated list of user land binaries for it. conda-forge does not include things like libraries and fonts with its distribution.

Reason for request / specific use case breaking:

Was trying to install and use the Camelot python package that can parse PDF tables. It declares a dependency on Ghostscript here. Executed the following steps in my conda env:

• Installed the Camelot python package with no issues
• Installed the conda-forge Ghostscript package with no issues
• Ran the conda-forge gs per the Camelot docs with no issues

Then tried to run a simple confirmation script:

>>> import camelot
>>> tables = camelot.read_pdf('foo.pdf')
Traceback (most recent call last):
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/site-packages/camelot/ext/ghostscript/_gsprint.py", line 260, in <module>
    libgs = cdll.LoadLibrary("libgs.so")
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/ctypes/__init__.py", line 442, in LoadLibrary
    return self._dlltype(name)
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/ctypes/__init__.py", line 364, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: dlopen(libgs.so, 6): image not found

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/site-packages/camelot/io.py", line 117, in read_pdf
    **kwargs
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/site-packages/camelot/handlers.py", line 172, in parse
    p, suppress_stdout=suppress_stdout, layout_kwargs=layout_kwargs
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/site-packages/camelot/parsers/lattice.py", line 402, in extract_tables
    self._generate_image()
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/site-packages/camelot/parsers/lattice.py", line 211, in _generate_image
    from ..ext.ghostscript import Ghostscript
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/site-packages/camelot/ext/ghostscript/__init__.py", line 24, in <module>
    from . import _gsprint as gs
  File "/Users/jameshall/opt/anaconda3/envs/camelot/lib/python3.7/site-packages/camelot/ext/ghostscript/_gsprint.py", line 267, in <module>
    raise RuntimeError("Please make sure that Ghostscript is installed")
RuntimeError: Please make sure that Ghostscript is installed

Determined that libgs was not a part of the conda-forge package and could not find another Ghostscript related package for the libs and fonts.

I would think that other key python packages like PDFMiner would need the libs and fonts also.

Workaround: create conda environment without installing the conda-forge Ghostscript and install Ghostscript from Homebrew

Thanks for your consideration and let me know if I missed a step somewhere to get a full install of Ghostscript!

Environment (conda list):

# Name                    Version                   Build  Channel
bzip2                     1.0.8                haf1e3a3_3    conda-forge
ca-certificates           2020.7.22                     0  
cairo                     1.16.0            ha8983da_1005    conda-forge
camelot-py                0.8.2                      py_0    conda-forge
certifi                   2020.6.20                py37_0  
cffi                      1.14.2           py37hed5b41f_0  
chardet                   3.0.4           py37hc8dfbb8_1006    conda-forge
click                     7.1.2              pyh9f0ad1d_0    conda-forge
cryptography              3.1              py37h94e4008_0    conda-forge
cycler                    0.10.0                     py_2    conda-forge
et_xmlfile                1.0.1                   py_1001    conda-forge
ffmpeg                    4.3.1                h9903f1f_0    conda-forge
fontconfig                2.13.1            h79c0d67_1002    conda-forge
freetype                  2.10.2               h8da9a1a_0    conda-forge
gettext                   0.19.8.1             h1f1d5ed_1    conda-forge
ghostscript               9.22              h0a44026_1001    conda-forge
glib                      2.65.0               hc5f4afa_0  
gmp                       6.2.0                hb1e8313_2    conda-forge
gnutls                    3.6.13               hc269f14_0    conda-forge
graphite2                 1.3.13            h12caacf_1001    conda-forge
harfbuzz                  2.7.2                h8810732_0    conda-forge
hdf5                      1.10.6          nompi_haae91d6_101    conda-forge
icu                       67.1                 hb1e8313_0    conda-forge
idna                      2.10               pyh9f0ad1d_0    conda-forge
jasper                    1.900.1           h636a363_1006    conda-forge
jdcal                     1.4.1                      py_0    conda-forge
jpeg                      9d                   h0b31af3_0    conda-forge
kiwisolver                1.2.0            py37ha1cc60f_0    conda-forge
lame                      3.100             h1de35cc_1001    conda-forge
lcms2                     2.11                 h174193d_0    conda-forge
libblas                   3.8.0               17_openblas    conda-forge
libcblas                  3.8.0               17_openblas    conda-forge
libcxx                    10.0.1               h5f48129_0    conda-forge
libffi                    3.3                  hb1e8313_2  
libgfortran               4.0.0                         3    conda-forge
libgfortran4              7.5.0                h1565451_3    conda-forge
libiconv                  1.16                 haf1e3a3_0    conda-forge
liblapack                 3.8.0               17_openblas    conda-forge
liblapacke                3.8.0               17_openblas    conda-forge
libopenblas               0.3.10          openmp_h63d9170_4    conda-forge
libopencv                 4.4.0                    py37_2    conda-forge
libpng                    1.6.37               hb0a8c7a_2    conda-forge
libtiff                   4.1.0                h2ae36a8_6    conda-forge
libwebp-base              1.1.0                h0b31af3_3    conda-forge
libxml2                   2.9.10               h2c6e4a5_2    conda-forge
llvm-openmp               10.0.1               h28b9765_0    conda-forge
lz4-c                     1.9.2                hb1e8313_3    conda-forge
matplotlib-base           3.3.1            py37h886f89f_1    conda-forge
ncurses                   6.2                  hb1e8313_1    conda-forge
nettle                    3.4.1             h3efe00b_1002    conda-forge
numpy                     1.19.1           py37h1efc2f6_2    conda-forge
olefile                   0.46                       py_0    conda-forge
opencv                    4.4.0                    py37_2    conda-forge
openh264                  2.1.1                hd174df1_0    conda-forge
openpyxl                  3.0.5                      py_0    conda-forge
openssl                   1.1.1g               h1de35cc_0  
pandas                    1.1.1            py37hdadc0f0_0    conda-forge
pcre                      8.44                 h4a8c4bd_0    conda-forge
pdfminer.six              20200726                   py_1    conda-forge
pillow                    7.2.0            py37hfd78ece_1    conda-forge
pip                       20.2.2                     py_0    conda-forge
pixman                    0.38.0            h01d97ff_1003    conda-forge
py-opencv                 4.4.0            py37h43977f1_2    conda-forge
pycparser                 2.20               pyh9f0ad1d_2    conda-forge
pycryptodome              3.9.7            py37h22c4c0b_1    conda-forge
pyparsing                 2.4.7              pyh9f0ad1d_0    conda-forge
pypdf2                    1.26.0                     py_2    conda-forge
python                    3.7.9                h26836e1_0  
python-dateutil           2.8.1                      py_0    conda-forge
python_abi                3.7                     1_cp37m    conda-forge
pytz                      2020.1             pyh9f0ad1d_0    conda-forge
readline                  8.0                  h0678c8f_2    conda-forge
setuptools                49.6.0           py37hc8dfbb8_0    conda-forge
six                       1.15.0             pyh9f0ad1d_0    conda-forge
sortedcontainers          2.2.2              pyh9f0ad1d_0    conda-forge
sqlite                    3.33.0               h960bd1c_0    conda-forge
tk                        8.6.10               hb0a8c7a_0    conda-forge
tornado                   6.0.4            py37h9bfed18_1    conda-forge
wheel                     0.35.1             pyh9f0ad1d_0    conda-forge
x264                      1!152.20180806       h1de35cc_0    conda-forge
xlwt                      1.3.0                    py37_0  
xz                        5.2.5                haf1e3a3_1    conda-forge
zlib                      1.2.11            h7795811_1009    conda-forge
zstd                      1.4.5                h289c70a_2    conda-forge
(camelot) jameshall@Jamess-MacBook-Pro initial-proposal % 

Details about conda and system ( conda info ):

% conda info

     active environment : camelot
    active env location : /Users/user/opt/anaconda3/envs/camelot
            shell level : 2 
       user config file : /Users/user/.condarc
 populated config files : /Users/user/.condarc
          conda version : 4.8.4
    conda-build version : 3.18.11
         python version : 3.8.3.final.0
       virtual packages : __osx=10.15.6
       base environment : /Users/user/opt/anaconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/osx-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/osx-64
                          https://repo.anaconda.com/pkgs/r/noarch
          package cache : /Users/user/opt/anaconda3/pkgs
                          /Users/user/.conda/pkgs
       envs directories : /Users/user/opt/anaconda3/envs
                          /Users/user/.conda/envs
               platform : osx-64
             user-agent : conda/4.8.4 requests/2.24.0 CPython/3.8.3 Darwin/19.6.0 OSX/10.15.6
                UID:GID : 501:20
             netrc file : None
           offline mode : False

[tdegeus]

Do you know how to implement this ? If I look at the build script all looks default : https://github.com/conda-forge/ghostscript-feedstock/blob/master/recipe/build.sh . So what options should be added ?

[jimhall]

Not a ghostscript expert, but it looks like you need to add "make so":

From the owner of the code MacOS and UNIX mention the same step.