Fix install failure on mac arm 64

Install using pyproject.toml and requirements.txt was failing on mac arm64 with the following error:

  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [23 lines of output]
      running egg_info
      creating /private/var/folders/6v/8t3yrz1906547q16rrbtzw3c0000gn/T/pip-pip-egg-info-i0xhy0sj/psycopg2_binary.egg-info
      writing /private/var/folders/6v/8t3yrz1906547q16rrbtzw3c0000gn/T/pip-pip-egg-info-i0xhy0sj/psycopg2_binary.egg-info/PKG-INFO
      writing dependency_links to /private/var/folders/6v/8t3yrz1906547q16rrbtzw3c0000gn/T/pip-pip-egg-info-i0xhy0sj/psycopg2_binary.egg-info/dependency_links.txt
      writing top-level names to /private/var/folders/6v/8t3yrz1906547q16rrbtzw3c0000gn/T/pip-pip-egg-info-i0xhy0sj/psycopg2_binary.egg-info/top_level.txt
      writing manifest file '/private/var/folders/6v/8t3yrz1906547q16rrbtzw3c0000gn/T/pip-pip-egg-info-i0xhy0sj/psycopg2_binary.egg-info/SOURCES.txt'

      Error: pg_config executable not found.

      pg_config is required to build psycopg2 from source.  Please add the directory
      containing pg_config to the $PATH or specify the full executable path with the
      option:

          python setup.py build_ext --pg-config /path/to/pg_config build ...

      or with the pg_config option in 'setup.cfg'.

      If you prefer to avoid building psycopg2 from source, please install the PyPI
      'psycopg2-binary' package instead.

      For further information please check the 'doc/src/install.rst' file (also at
      <https://www.psycopg.org/docs/install.html>).

      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

the fix is to use psycopg2-binary if on mac arm64

synthesized-io / insight

Fix install failure on mac arm 64 #153