Failed build on main branch (tests #206)

[github-actions]

Workflow failed: tests #206

[pjbull]

Failure on pip installing pygraphviz:

   Running setup.py install for pygraphviz: started
  Running setup.py install for pygraphviz: finished with status 'error'
  error: subprocess-exited-with-error
  × Running setup.py install for pygraphviz did not run successfully.
  │ exit code: 1
  ╰─> [55 lines of output]
      running install
      running build
      running build_py
      creating build
      creating build/lib.macosx-10.15-universal2-3.10
      creating build/lib.macosx-10.15-universal2-3.10/pygraphviz
      copying pygraphviz/scraper.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz
      copying pygraphviz/graphviz.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz
      copying pygraphviz/__init__.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz
      copying pygraphviz/agraph.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz
      copying pygraphviz/testing.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz
      creating build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_unicode.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_scraper.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_readwrite.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_string.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/__init__.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_html.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_node_attributes.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_drawing.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_repr_mimebundle.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_subgraph.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_close.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_edge_attributes.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_clear.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_layout.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_attribute_defaults.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      copying pygraphviz/tests/test_graph.py -> build/lib.macosx-10.15-universal2-3.10/pygraphviz/tests
      running egg_info
      writing pygraphviz.egg-info/PKG-INFO
      writing dependency_links to pygraphviz.egg-info/dependency_links.txt
      writing top-level names to pygraphviz.egg-info/top_level.txt
      reading manifest file 'pygraphviz.egg-info/SOURCES.txt'
      reading manifest template 'MANIFEST.in'
      warning: no files found matching '*.png' under directory 'doc'
      warning: no files found matching '*.txt' under directory 'doc'
      warning: no files found matching '*.css' under directory 'doc'
      warning: no previously-included files matching '*~' found anywhere in distribution
      warning: no previously-included files matching '*.pyc' found anywhere in distribution
      warning: no previously-included files matching '.svn' found anywhere in distribution
      no previously-included directories found matching 'doc/build'
      adding license file 'LICENSE'
      writing manifest file 'pygraphviz.egg-info/SOURCES.txt'
      copying pygraphviz/graphviz.i -> build/lib.macosx-10.15-universal2-3.10/pygraphviz
      copying pygraphviz/graphviz_wrap.c -> build/lib.macosx-10.15-universal2-3.10/pygraphviz
      running build_ext
      building 'pygraphviz._graphviz' extension
      creating build/temp.macosx-10.15-universal2-3.10
      creating build/temp.macosx-10.15-universal2-3.10/pygraphviz
      gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -arch arm64 -arch x86_64 -isysroot /Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk -I/usr/local/opt/sqlite/include -I/usr/local/opt/sqlite/include -I/Users/runner/hostedtoolcache/Python/3.10.5/x64/include/python3.10 -c pygraphviz/graphviz_wrap.c -o build/temp.macosx-10.15-universal2-3.10/pygraphviz/graphviz_wrap.o
      pygraphviz/graphviz_wrap.c:2711:10: fatal error: 'graphviz/cgraph.h' file not found
      #include "graphviz/cgraph.h"
               ^~~~~~~~~~~~~~~~~~~
      1 error generated.
      error: command '/usr/bin/gcc' failed with exit code 1
      [end of output]
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: legacy-install-failure
× Encountered error while trying to install package.
╰─> pygraphviz

Two options:

(1) The brew install of graphviz seems to be a new (not sure how new) major version, so potentially that is the issue:

From the install logs of the test run:

...
==>Pouring graphviz--3.0.0.big_sur.bottle.tar.gz
🍺  /usr/local/Cellar/graphviz/3.0.0: 292 files, 6.9MB

(2) The fix listed in this thread is for M1 macs, but maybe can help pip find the brew installed version of graphviz

pygraphviz/pygraphviz#398 (comment)

[jayqi]

Whatever this was seemed to have resolved itself.