bpo-42955: Add Python/module_names.h (GH-24258)

Add a private list of all stdlib modules: _Py_module_names.

* Add Tools/scripts/generate_module_names.py script.
* Makefile: Add "make regen-module-names" command.
* setup.py: Add --list-module-names option.
* GitHub Action and Travis CI also runs "make regen-module-names",
  not ony "make regen-all", to ensure that the module names remains
  up to date.

Author: vstinner

.github/workflows/build.yml

@@ -63,6 +63,7 @@ jobs:
           # Build Python with the libpython dynamic library
           ./configure --with-pydebug --enable-shared
           make -j4 regen-all
+          make regen-module-names
       - name: Check for changes
         run: |
           changes=$(git status --porcelain)

.travis.yml

@@ -172,6 +172,7 @@ before_script:
   - eval "$(pyenv init -)"
   - pyenv global 3.8
   - PYTHON_FOR_REGEN=python3.8 make -j4 regen-all
+  - make regen-module-names
   - changes=`git status --porcelain`
   - |
       # Check for changes in regenerated files

Makefile.pre.in

@@ -252,7 +252,7 @@ PYTHON=		python$(EXE)
 BUILDPYTHON=	python$(BUILDEXE)
 
 PYTHON_FOR_REGEN?=@PYTHON_FOR_REGEN@
-UPDATE_FILE=@PYTHON_FOR_REGEN@ $(srcdir)/Tools/scripts/update_file.py
+UPDATE_FILE=$(PYTHON_FOR_REGEN) $(srcdir)/Tools/scripts/update_file.py
 PYTHON_FOR_BUILD=@PYTHON_FOR_BUILD@
 _PYTHON_HOST_PLATFORM=@_PYTHON_HOST_PLATFORM@
 BUILD_GNU_TYPE=	@build@
@@ -757,6 +757,8 @@ regen-limited-abi: all
 regen-all: regen-opcode regen-opcode-targets regen-typeslots \
 	regen-token regen-ast regen-keyword regen-importlib clinic \
 	regen-pegen-metaparser regen-pegen
+	@echo
+	@echo "Note: make regen-module-names and autoconf should be run manually"
 
 ############################################################################
 # Special rules for object files
@@ -896,6 +898,15 @@ regen-keyword:
 		$(srcdir)/Lib/keyword.py.new
 	$(UPDATE_FILE) $(srcdir)/Lib/keyword.py $(srcdir)/Lib/keyword.py.new
 
+.PHONY: regen-module-names
+regen-module-names: build_all
+	# Regenerate Python/module_names.h
+	# using Tools/scripts/generate_module_names.py
+	$(RUNSHARED) ./$(BUILDPYTHON) \
+		$(srcdir)/Tools/scripts/generate_module_names.py \
+		> $(srcdir)/Python/module_names.h.new
+	$(UPDATE_FILE) $(srcdir)/Python/module_names.h $(srcdir)/Python/module_names.h.new
+
 Python/compile.o Python/symtable.o Python/ast_unparse.o Python/ast.o Python/future.o: $(srcdir)/Include/Python-ast.h
 
 Python/getplatform.o: $(srcdir)/Python/getplatform.c
@@ -1145,7 +1156,9 @@ PYTHON_HEADERS= \
 		$(srcdir)/Include/internal/pycore_ucnhash.h \
 		$(srcdir)/Include/internal/pycore_unionobject.h \
 		$(srcdir)/Include/internal/pycore_warnings.h \
-		$(DTRACE_HEADERS)
+		$(DTRACE_HEADERS) \
+		\
+		$(srcdir)/Python/module_names.h
 
 $(LIBRARY_OBJS) $(MODOBJS) Programs/python.o: $(PYTHON_HEADERS)
 

PCbuild/pythoncore.vcxproj

@@ -291,6 +291,7 @@
     <ClInclude Include="..\Python\ceval_gil.h" />
     <ClInclude Include="..\Python\condvar.h" />
     <ClInclude Include="..\Python\importdl.h" />
+    <ClInclude Include="..\Python\module_names.h" />
     <ClInclude Include="..\Python\thread_nt.h" />
     <ClInclude Include="..\Python\wordcode_helpers.h" />
   </ItemGroup>

PCbuild/pythoncore.vcxproj.filters

@@ -360,6 +360,9 @@
     <ClInclude Include="..\Python\importdl.h">
       <Filter>Python</Filter>
     </ClInclude>
+    <ClInclude Include="..\Python\module_names.h">
+      <Filter>Python</Filter>
+    </ClInclude>
     <ClInclude Include="..\Python\thread_nt.h">
       <Filter>Python</Filter>
     </ClInclude>