python: Rename build related code to ovs_build_helpers.

The python/build folder contents are completely unrelated to the ovs
python bindings. These files are only used during the build for various
subsystems (docs, man pages, code generation, etc.).

Having that folder in that location prevents from running:

  cd python && python3 -m build

Which is a way to generate PEP517 compatible source archives and binary
wheel packages.

Rename that folder to ovs_build_helpers which is more explicit. Update
all imports accordingly.

Link: https://peps.python.org/pep-0517/
Link: https://pypi.org/project/build/
Signed-off-by: Robin Jarry <rjarry@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

Makefile.am

@@ -415,7 +415,7 @@ endif
 CLEANFILES += flake8-check
 
 -include manpages.mk
-manpages.mk: $(MAN_ROOTS) build-aux/sodepends.py python/build/soutil.py
+manpages.mk: $(MAN_ROOTS) build-aux/sodepends.py python/ovs_build_helpers/soutil.py
 	@PYTHONPATH=$$PYTHONPATH$(psep)$(srcdir)/python $(PYTHON3) $(srcdir)/build-aux/sodepends.py -I. -I$(srcdir) $(MAN_ROOTS) >$(@F).tmp
 	@if cmp -s $(@F).tmp $@; then \
 	  touch $@; \

build-aux/extract-ofp-fields

@@ -4,9 +4,9 @@ import getopt
 import sys
 import os.path
 import xml.dom.minidom
-import build.nroff
 
-from build.extract_ofp_fields import (
+from ovs_build_helpers import nroff
+from ovs_build_helpers.extract_ofp_fields import (
     extract_ofp_fields,
     PREREQS,
     OXM_CLASSES,
@@ -297,7 +297,7 @@ l lx.
     body += [".TE\n"]
 
     body += [".PP\n"]
-    body += [build.nroff.block_xml_to_nroff(field_node.childNodes)]
+    body += [nroff.block_xml_to_nroff(field_node.childNodes)]
 
 
 def group_xml_to_nroff(group_node, fields):
@@ -310,11 +310,11 @@ def group_xml_to_nroff(group_node, fields):
             id_ = node.attributes["id"].nodeValue
             field_to_xml(node, fields[id_], body, summary)
         else:
-            body += [build.nroff.block_xml_to_nroff([node])]
+            body += [nroff.block_xml_to_nroff([node])]
 
     content = [
         ".bp\n",
-        '.SH "%s"\n' % build.nroff.text_to_nroff(title.upper() + " FIELDS"),
+        '.SH "%s"\n' % nroff.text_to_nroff(title.upper() + " FIELDS"),
         '.SS "Summary:"\n',
         ".TS\n",
         "tab(;),nowarn;\n",
@@ -422,7 +422,7 @@ ovs\-fields \- protocol header fields in OpenFlow and Open vSwitch
         elif node.nodeType == node.COMMENT_NODE:
             pass
         else:
-            s += build.nroff.block_xml_to_nroff([node])
+            s += nroff.block_xml_to_nroff([node])
 
     for f in fields:
         if "used" not in f:

build-aux/gen_ofp_field_decoders

@@ -2,7 +2,7 @@
 
 import argparse
 
-import build.extract_ofp_fields as extract_fields
+from ovs_build_helpers.extract_ofp_fields import extract_ofp_fields
 
 
 def main():
@@ -19,7 +19,7 @@ def main():
 
     args = parser.parse_args()
 
-    fields = extract_fields.extract_ofp_fields(args.metaflow)
+    fields = extract_ofp_fields(args.metaflow)
 
     field_decoders = {}
     aliases = {}

build-aux/sodepends.py

@@ -14,9 +14,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from build import soutil
 import sys
 
+from ovs_build_helpers import soutil
+
 
 def sodepends(include_dirs, filenames, dst):
     ok = True

build-aux/soexpand.py

@@ -14,9 +14,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from build import soutil
 import sys
 
+from ovs_build_helpers import soutil
+
 
 def soexpand(include_dirs, src, dst):
     ok = True

build-aux/xml2nroff

@@ -18,7 +18,7 @@ import getopt
 import sys
 import xml.dom.minidom
 
-import build.nroff
+from ovs_build_helpers import nroff
 
 argv0 = sys.argv[0]
 
@@ -90,10 +90,10 @@ def manpage_to_nroff(xml_file, subst, include_path, version=None):
 .  I "\\$1"
 .  RE
 ..
-''' % (build.nroff.text_to_nroff(program), build.nroff.text_to_nroff(section),
-       build.nroff.text_to_nroff(title), build.nroff.text_to_nroff(version))
+''' % (nroff.text_to_nroff(program), nroff.text_to_nroff(section),
+       nroff.text_to_nroff(title), nroff.text_to_nroff(version))
 
-    s += build.nroff.block_xml_to_nroff(doc.childNodes) + "\n"
+    s += nroff.block_xml_to_nroff(doc.childNodes) + "\n"
 
     return s
 
@@ -139,7 +139,7 @@ if __name__ == "__main__":
 
     try:
         s = manpage_to_nroff(args[0], subst, include_path, version)
-    except build.nroff.error.Error as e:
+    except nroff.error.Error as e:
         sys.stderr.write("%s: %s\n" % (argv0, e.msg))
         sys.exit(1)
     for line in s.splitlines():

ovsdb/ovsdb-doc

@@ -24,7 +24,7 @@ import ovs.json
 from ovs.db import error
 import ovs.db.schema
 
-from build.nroff import *
+from ovs_build_helpers.nroff import *
 
 argv0 = sys.argv[0]
 

python/automake.mk

@@ -66,10 +66,10 @@ ovs_pytests = \
 # These python files are used at build time but not runtime,
 # so they are not installed.
 EXTRA_DIST += \
-	python/build/__init__.py \
-	python/build/extract_ofp_fields.py \
-	python/build/nroff.py \
-	python/build/soutil.py
+	python/ovs_build_helpers/__init__.py \
+	python/ovs_build_helpers/extract_ofp_fields.py \
+	python/ovs_build_helpers/nroff.py \
+	python/ovs_build_helpers/soutil.py
 
 # PyPI support.
 EXTRA_DIST += \
@@ -88,10 +88,10 @@ PYCOV_CLEAN_FILES += $(PYFILES:.py=.py,cover)
 
 FLAKE8_PYFILES += \
 	$(filter-out python/ovs/compat/% python/ovs/dirs.py,$(PYFILES)) \
-	python/build/__init__.py \
-	python/build/extract_ofp_fields.py \
-	python/build/nroff.py \
-	python/build/soutil.py \
+	python/ovs_build_helpers/__init__.py \
+	python/ovs_build_helpers/extract_ofp_fields.py \
+	python/ovs_build_helpers/nroff.py \
+	python/ovs_build_helpers/soutil.py \
 	python/ovs/dirs.py.template \
 	python/setup.py