build: Stop pre-generating man pages

The original asciidoc project is still stuck on python2, so on
distros that didn't switch to a fork (like Fedora), it pulls
in over 100M of legacy dependencies.

However we are about to move our man pages to reStructuredText
which doesn't have that issue, and which is already used for
GLib's and GTK's man pages.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3454>

meson.build

@@ -132,13 +132,9 @@ else
 endif
 
 if get_option('man')
-  if fs.exists('man/gnome-shell.1')
-    install_man('man/gnome-shell.1')
-  else
   a2x = find_program('a2x')
   subdir('man')
 endif
-endif
 
 mutter_typelibdir = mutter_dep.get_variable('typelibdir')
 python = find_program('python3')
@@ -326,7 +322,6 @@ gnome.post_install(
   gtk_update_icon_cache: true
 )
 
-meson.add_dist_script('meson/generate-manpages.py')
 meson.add_dist_script('meson/generate-stylesheets.py')
 meson.add_dist_script('meson/check-version.py', meson.project_version(), 'NEWS')
 

meson/generate-manpages.py

@@ -1,23 +0,0 @@
-#!/usr/bin/env python3
-
-import os
-from pathlib import PurePath
-import subprocess
-
-man_pages = [
-    'man/gnome-shell.1',
-    'subprojects/extensions-tool/man/gnome-extensions.1',
-]
-
-sourceroot = os.environ.get('MESON_SOURCE_ROOT')
-distroot = os.environ.get('MESON_DIST_ROOT')
-
-for man_page in man_pages:
-    page_path = PurePath(man_page)
-    src = PurePath(sourceroot, page_path.with_suffix('.txt'))
-    dst = PurePath(distroot, page_path)
-    stylesheet = src.with_name('stylesheet.xsl')
-
-    subprocess.call(['a2x', '--xsl-file', os.fspath(stylesheet),
-      '--format', 'manpage', '--destination-dir', os.fspath(dst.parent),
-      os.fspath(src)])

subprojects/extensions-tool/meson.build

@@ -47,13 +47,9 @@ if bash_completion.found()
 endif
 
 if get_option('man')
-  if fs.exists('man/gnome-extensions.1')
-    install_man('man/gnome-extensions.1')
-  else
   a2x = find_program('a2x')
   subdir('man')
 endif
-endif
 
 if not meson.is_subproject()
   subdir('po')