Use _requirestxt logic for writing 'requires.txt'

This change extracts the logic for writing 'requires.txt' from
the ``egg_info`` module into ``_requirestxt``.

It also adds the missing pre-processing for ``install_requires`` and
``extras_require`` previously done in ``dist`` but now implemented in
``_requires.txt``.

1 files changed, 4 insertions, 25 deletions

diff --git a/setuptools/command/egg_info.py b/setuptools/command/egg_info.py
index f5163ae7..c1accca6 100644
--- a/setuptools/command/egg_info.py
+++ b/setuptools/command/egg_info.py
@@ -18,6 +18,7 @@ import collections
 
 from .._importlib import metadata
 from .. import _entry_points, _normalization
+from . import _requirestxt
 
 from setuptools import Command
 from setuptools.command.sdist import sdist
@@ -28,7 +29,6 @@ import setuptools.unicode_utils as unicode_utils
 from setuptools.glob import glob
 
 from setuptools.extern import packaging
-from setuptools.extern.jaraco.text import yield_lines
 from ..warnings import SetuptoolsDeprecationWarning
 
 
@@ -719,30 +719,9 @@ def warn_depends_obsolete(cmd, basename, filename):
         )
 
 
-def _write_requirements(stream, reqs):
-    lines = yield_lines(reqs or ())
-
-    def append_cr(line):
-        return line + '\n'
-    lines = map(append_cr, lines)
-    stream.writelines(lines)
-
-
-def write_requirements(cmd, basename, filename):
-    dist = cmd.distribution
-    data = io.StringIO()
-    _write_requirements(data, dist.install_requires)
-    extras_require = dist.extras_require or {}
-    for extra in sorted(extras_require):
-        data.write('\n[{extra}]\n'.format(**vars()))
-        _write_requirements(data, extras_require[extra])
-    cmd.write_or_delete_file("requirements", filename, data.getvalue())
-
-
-def write_setup_requirements(cmd, basename, filename):
-    data = io.StringIO()
-    _write_requirements(data, cmd.distribution.setup_requires)
-    cmd.write_or_delete_file("setup-requirements", filename, data.getvalue())
+# Export API used in entry_points
+write_requirements = _requirestxt.write_requirements
+write_setup_requirements = _requirestxt.write_setup_requirements
 
 
 def write_toplevel_names(cmd, basename, filename):