Run pip without the --build flag

[jordansissel]

Previously, fpm would use pip download ... --build ... to instruct pip
to unpack a given python package to a specific directory for the purpose
of running something like python setup.py from it.

However, somewhere in 2021, pip removed this flag. First, I think, it
was deprecated and ignored, then finally removed. One reference to
this removal in the upstream pip project is this issue:
pypa/pip#8333

Without --build, pip will place a single tarball in the destination
directory. Fpm cannot easily predict the name of this file because we
don't know the "real" name of the python package nor do we know the
version number being downloaded.

For example:

% python3 -m pip download --no-binary :all: --no-deps --no-clean django
...
Successfully downloaded django
% ls
Django-4.0.4.tar.gz

Best guess:

• we can expect exactly one file in the previously-empty target directory
• we can also expect that it is a .tar.gz

I don't know if these guesses are always correct, but it's a start.

As of this commit, the following command generates a Debian package:

fpm -s python --python-bin python3 -t deb django

Prior to this commit, with a newer version of pip, the command would
fail.

Fixes #1831

[jordansissel]

Test results:

% bundle exec rspec spec/fpm/package/python_spec.rb                              
.............

Finished in 22.83 seconds (files took 0.1969 seconds to load)
13 examples, 0 failures

Tested on ruby 3.0.2, python3 3.10.4.

[de-bug]

Yes, works for me, thank you @jordansissel

[emansom]

Fails here on Arch using the AUR package (with this pull request applied as patch atop). Not sure why. 🤷🏻‍♂️

$ fpm -s python -t rpm tcconfig
/usr/lib/ruby/gems/3.0.0/gems/json-2.6.2/lib/json/common.rb:216:in `parse': 859: unexpected token at '' (JSON::ParserError)
        from /usr/lib/ruby/gems/3.0.0/gems/json-2.6.2/lib/json/common.rb:216:in `parse'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/package/python.rb:255:in `load_package_info'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/package/python.rb:111:in `input'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:352:in `block in execute'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:351:in `each'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:351:in `execute'
        from /usr/lib/ruby/gems/3.0.0/gems/clamp-1.2.1/lib/clamp/command.rb:63:in `run'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:574:in `run'
        from /usr/lib/ruby/gems/3.0.0/gems/clamp-1.2.1/lib/clamp/command.rb:132:in `run'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/bin/fpm:7:in `<top (required)>'
        from /usr/bin/fpm:25:in `load'
        from /usr/bin/fpm:25:in `<main>'

With --debug:

$ fpm --debug -s python --python-bin python3 -t rpm tcconfig
Setting workdir {:workdir=>"/tmp", :level=>:info, :file=>"fpm/command.rb", :line=>"294", :method=>"execute"}
Setting attribute {:output_type=>"rpm", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:input_type=>"python", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:chdir=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:prefix=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:package=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:force?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:name=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:log_level=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:verbose?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:debug?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:debug_workspace?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:version=>1.0, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:iteration=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:epoch=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:license=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:vendor=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:category=>"none", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:dependencies=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:no_depends?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:no_auto_depends?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:provides=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:conflicts=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:replaces=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:config_files=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:directories=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:architecture=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:maintainer=>"<ewout@x11sslf>", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:package_name_suffix=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:edit?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:excludes=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:exclude_file=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:description=>"no description", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:url=>"http://example.com/no-uri-given", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:inputs=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:post_install=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pre_install=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:post_uninstall=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pre_uninstall=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:after_install=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:before_install=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:after_remove=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:before_remove=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:after_upgrade=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:before_upgrade=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:template_scripts?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:template_value_list=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:workdir=>"/tmp", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:source_date_epoch_from_changelog?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:source_date_epoch_default=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_bin_path=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_package_prefix=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_package_name_prefix=>"rubygem", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_gem=>"gem", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_shebang=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_fix_name?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_fix_dependencies?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_env_shebang?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_prerelease?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_disable_dependencies=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_embed_dependencies?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_version_bins?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_stagingdir=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_git_repo=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:gem_git_branch=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_ignore_iteration_in_dependencies?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_build_depends=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_pre_depends=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_compression=>"gz", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_dist=>"unstable", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_custom_control=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_config=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_templates=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_installed_size=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_priority=>"extra", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_use_file_permissions?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_user=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_group=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_changelog=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_generate_changes?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_upstream_changelog=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_recommends=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_suggests=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_meta_file=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_interest=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_activate=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_interest_noawait=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_activate_noawait=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_field=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_no_default_config_files?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_auto_config_files?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_shlibs=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_init_list=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_default_list=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_upstart_list=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_systemd_list=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_systemd_enable?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_systemd_auto_start?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_systemd_restart_after_upgrade?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_after_purge=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:deb_maintainerscripts_force_errorchecks?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:npm_bin=>"npm", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:npm_package_name_prefix=>"node", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:npm_registry=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_use_file_permissions?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_user=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_group=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_defattrfile=>"-", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_defattrdir=>"-", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_rpmbuild_define=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_dist=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_digest=>"md5", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_compression_level=>"9", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_compression=>"gzip", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_os=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_changelog=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_summary=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_sign?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_auto_add_directories?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:auto_add_exclude_directories=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_autoreqprov?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_autoreq?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_autoprov?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:attrs=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_init_list=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_filter_from_provides=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_filter_from_requires=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_tag=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_ignore_iteration_in_dependencies?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_verbatim_gem_dependencies?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_macro_expansion?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_verifyscript=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_pretrans=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_posttrans=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_trigger_before_install=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_trigger_after_install=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_trigger_before_uninstall=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:rpm_trigger_after_target_uninstall=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_perl_bin=>"perl", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_cpanm_bin=>"cpanm", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_mirror=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_mirror_only?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_package_name_prefix=>"perl", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_test?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_verbose?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_perl_lib_path=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_sandbox_non_core?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:cpan_cpanm_force?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pear_package_name_prefix=>"php-pear", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pear_channel=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pear_channel_update?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pear_bin_dir=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pear_php_bin=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pear_php_dir=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pear_data_dir=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_bin=>"python3", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_easyinstall=>"easy_install", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_pip=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_pypi=>"https://pypi.python.org/simple", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_trusted_host=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_package_prefix=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_package_name_prefix=>"python", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_fix_name?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_fix_dependencies?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_downcase_name?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_downcase_dependencies?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_install_bin=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_install_lib=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_install_data=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_dependencies?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_obey_requirements_txt?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_scripts_executable=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_disable_dependency=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_setup_py_arguments=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:python_internal_pip?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:osxpkg_identifier_prefix=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:osxpkg_payload_free?=>false, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:osxpkg_ownership=>"recommended", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:osxpkg_postinstall_action=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:osxpkg_dont_obsolete=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:solaris_user=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:solaris_group=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:p5p_user=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:p5p_group=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:p5p_zonetype=>"value=global value=nonglobal", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:p5p_publisher=>"FPM", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:p5p_lint?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:p5p_validate?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:freebsd_origin=>"fpm/<name>", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:snap_yaml=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:snap_confinement=>"devmode", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:snap_grade=>"devel", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pacman_optional_depends_list=>[], :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pacman_use_file_permissions?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pacman_user=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pacman_group=>"root", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pacman_compression=>"zstd", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pleaserun_name=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:pleaserun_chdir=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_pypi=>"https://pypi.python.org/simple", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_package_name_prefix=>"virtualenv", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_install_location=>"/usr/share/python", :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_fix_name?=>true, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_other_files_dir=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_pypi_extra_index_urls=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_setup_install?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_system_site_packages?=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Setting attribute {:virtualenv_find_links_urls=>nil, :level=>:debug, :file=>"fpm/command.rb", :line=>"338", :method=>"block (2 levels) in execute"}
Trying to download {:package=>"tcconfig", :level=>:info, :file=>"fpm/package/python.rb", :line=>"126", :method=>"download_if_necessary"}
using pip {:pip=>["python3", "-m", "pip"], :level=>:debug, :file=>"fpm/package/python.rb", :line=>"144", :method=>"download_if_necessary"}
Running command {:args=>["python3", "-m", "pip", "download", "--no-clean", "--no-deps", "--no-binary", ":all:", "-d", "/tmp/package-python-build-08cba7d6c21a80d13fa281e369e365924c1c965204c655ffd57a1504c4df", "-i", "https://pypi.python.org/simple", "tcconfig"], :level=>:debug, :file=>"fpm/util.rb", :line=>"138", :method=>"execmd"}
Process is running {:pid=>319431, :level=>:debug, :file=>"fpm/util.rb", :line=>"147", :method=>"execmd"}
Looking in indexes: https://pypi.python.org/simple {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
Collecting tcconfig {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
  Using cached tcconfig-0.27.1.tar.gz (56 kB) {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
  Installing build dependencies: started {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
  Installing build dependencies: finished with status 'done' {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
  Getting requirements to build wheel: started {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
  Getting requirements to build wheel: finished with status 'done' {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
  Preparing metadata (pyproject.toml): started {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
  Preparing metadata (pyproject.toml): finished with status 'done' {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
Saved /tmp/package-python-build-08cba7d6c21a80d13fa281e369e365924c1c965204c655ffd57a1504c4df/tcconfig-0.27.1.tar.gz {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
Successfully downloaded tcconfig {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
Running command {:args=>["tar", "-zxf", "/tmp/package-python-build-08cba7d6c21a80d13fa281e369e365924c1c965204c655ffd57a1504c4df/tcconfig-0.27.1.tar.gz", "-C", "/tmp/package-python-build-08cba7d6c21a80d13fa281e369e365924c1c965204c655ffd57a1504c4df/tcconfig"], :level=>:debug, :file=>"fpm/util.rb", :line=>"138", :method=>"execmd"}
Process is running {:pid=>319546, :level=>:debug, :file=>"fpm/util.rb", :line=>"147", :method=>"execmd"}
Running command {:args=>["/usr/bin/zsh", "-c", "python3 -c 'try:\n  import json\nexcept ImportError:\n  import simplejson as json'"], :level=>:debug, :file=>"fpm/util.rb", :line=>"138", :method=>"execmd"}
Process is running {:pid=>319549, :level=>:debug, :file=>"fpm/util.rb", :line=>"147", :method=>"execmd"}
Running command {:args=>["/usr/bin/zsh", "-c", "python3 -c 'import pkg_resources'"], :level=>:debug, :file=>"fpm/util.rb", :line=>"138", :method=>"execmd"}
Process is running {:pid=>319551, :level=>:debug, :file=>"fpm/util.rb", :line=>"147", :method=>"execmd"}
fetching package metadata {:setup_cmd=>"env PYTHONPATH=/usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/package:$PYTHONPATH python3 setup.py --command-packages=pyfpm get_metadata --output=/tmp/package-python-build-08cba7d6c21a80d13fa281e369e365924c1c965204c655ffd57a1504c4df/metadata.json", :level=>:info, :file=>"fpm/package/python.rb", :line=>"243", :method=>"block in load_package_info"}
Running command {:args=>["/usr/bin/zsh", "-c", "env PYTHONPATH=/usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/package:$PYTHONPATH python3 setup.py --command-packages=pyfpm get_metadata --output=/tmp/package-python-build-08cba7d6c21a80d13fa281e369e365924c1c965204c655ffd57a1504c4df/metadata.json"], :level=>:debug, :file=>"fpm/util.rb", :line=>"138", :method=>"execmd"}
Process is running {:pid=>319554, :level=>:debug, :file=>"fpm/util.rb", :line=>"147", :method=>"execmd"}
running get_metadata {:level=>:info, :file=>"cabin/mixins/pipe.rb", :line=>"47", :method=>"block in pipe"}
result from `setup.py get_metadata` {:data=>"", :level=>:debug, :file=>"fpm/package/python.rb", :line=>"254", :method=>"load_package_info"}
Cleaning up staging path {:path=>"/tmp/package-python-staging-6100f6680307e12ef8a893bb4e61835b27544cb1b115c2f30f984dd35b8d", :level=>:debug, :file=>"fpm/package.rb", :line=>"284", :method=>"cleanup_staging"}
Cleaning up build path {:path=>"/tmp/package-python-build-08cba7d6c21a80d13fa281e369e365924c1c965204c655ffd57a1504c4df", :level=>:debug, :file=>"fpm/package.rb", :line=>"291", :method=>"cleanup_build"}
/usr/lib/ruby/gems/3.0.0/gems/json-2.6.2/lib/json/common.rb:216:in `parse': 859: unexpected token at '' (JSON::ParserError)
        from /usr/lib/ruby/gems/3.0.0/gems/json-2.6.2/lib/json/common.rb:216:in `parse'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/package/python.rb:255:in `load_package_info'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/package/python.rb:111:in `input'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:352:in `block in execute'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:351:in `each'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:351:in `execute'
        from /usr/lib/ruby/gems/3.0.0/gems/clamp-1.2.1/lib/clamp/command.rb:63:in `run'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/lib/fpm/command.rb:574:in `run'
        from /usr/lib/ruby/gems/3.0.0/gems/clamp-1.2.1/lib/clamp/command.rb:132:in `run'
        from /usr/lib/ruby/gems/3.0.0/gems/fpm-1.14.0/bin/fpm:7:in `<top (required)>'
        from /usr/bin/fpm:25:in `load'
        from /usr/bin/fpm:25:in `<main>'

[jordansissel]

@emansom I think your problem might be different than the pip --build issue. Can you open a new issue if you're still having this issue?