meson: Work around configure_file(copy:true) deprecation

In our meson scripts, we use configure_file(copy:true) to copy
files from srcdir into builddir. However, as of meson-0.64.0,
this is deprecated [1] in favor of using:

  fs = import('fs')
  fs.copyfile(in, out)

Except, the submodule's new method wasn't introduced until
0.64.0. And since we can't bump the minimal meson version we
require, we have to work with both: new and old versions.

Now, the fun part: fs.copyfile() is not a drop in replacement as
it returns different type (a custom_target object). This is
incompatible with places where we store the configure_file()
retval in a variable to process it further.

While we could just replace 'copy:true' with a dummy
'configuration:...' (say 'configuration: configmake_conf') we
can't do that for binary files (like src/fonts/ or src/images/).

Therefore, places where we are not interested in the retval can
be switched to fs.copyfile() and places where we are interested
in the retval will just use a dummy 'configuration:'.

Except, src/network/meson.build. In here we not just copy the
file but also specify alternative install dir and that's not
something that fs.copyfile() can handle. Yet, using 'copy: true'
is viewed wrong [2].

1: https://mesonbuild.com/Release-notes-for-0-64-0.html#fscopyfile-to-replace-configure_filecopy-true
2: mesonbuild/meson#10042

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

docs/css/meson.build

@@ -11,7 +11,11 @@ install_data(docs_css_files, install_dir: docs_html_dir / 'css')
 foreach file : docs_css_files
   # This hack enables us to view the web pages
   # from within the uninstalled build tree
-  configure_file(input: file, output: file, copy: true)
+  if meson.version().version_compare('>=0.64.0')
+    fs.copyfile(file)
+  else
+    configure_file(input: file, output: file, copy: true)
+  endif
 
   install_web_files += '@0@:@1@'.format(meson.current_source_dir() / file, docs_html_dir / 'css')
 endforeach

docs/fonts/meson.build

@@ -17,7 +17,11 @@ install_data(fonts, install_dir: docs_html_dir / 'fonts')
 foreach file : fonts
   # This hack enables us to view the web pages
   # from within the uninstalled build tree
-  configure_file(input: file, output: file, copy: true)
+  if meson.version().version_compare('>=0.64.0')
+    fs.copyfile(file)
+  else
+    configure_file(input: file, output: file, copy: true)
+  endif
 
   install_web_files += '@0@:@1@'.format(meson.current_source_dir() / file, docs_html_dir / 'fonts')
 endforeach

docs/images/meson.build

@@ -17,7 +17,11 @@ install_data(docs_image_files, install_dir: docs_html_dir / 'images')
 foreach file : docs_image_files
   # This hack enables us to view the web pages
   # from within the uninstalled build tree
-  configure_file(input: file, output: file, copy: true)
+  if meson.version().version_compare('>=0.64.0')
+    fs.copyfile(file)
+  else
+    configure_file(input: file, output: file, copy: true)
+  endif
 
   install_web_files += '@0@:@1@'.format(meson.current_source_dir() / file, docs_html_dir / 'images')
 endforeach

docs/js/meson.build

@@ -7,7 +7,11 @@ install_data(docs_js_files, install_dir: docs_html_dir / 'js')
 foreach file : docs_js_files
   # This hack enables us to view the web pages
   # from within the uninstalled build tree
-  configure_file(input: file, output: file, copy: true)
+  if meson.version().version_compare('>=0.64.0')
+    fs.copyfile(file)
+  else
+    configure_file(input: file, output: file, copy: true)
+  endif
 
-    install_web_files += '@0@:@1@'.format(meson.current_source_dir() / file, docs_html_dir / 'js')
+  install_web_files += '@0@:@1@'.format(meson.current_source_dir() / file, docs_html_dir / 'js')
 endforeach

docs/logos/meson.build

@@ -25,7 +25,11 @@ install_data(docs_logo_files, install_dir: docs_html_dir / 'logos')
 foreach file : docs_logo_files
   # This hack enables us to view the web pages
   # from within the uninstalled build tree
-  configure_file(input: file, output: file, copy: true)
+  if meson.version().version_compare('>=0.64.0')
+    fs.copyfile(file)
+  else
+    configure_file(input: file, output: file, copy: true)
+  endif
 
   install_web_files += '@0@:@1@'.format(meson.current_source_dir() / file, docs_html_dir / 'logos')
 endforeach

docs/meson.build

@@ -342,7 +342,11 @@ subdir('manpages')
 foreach file : docs_assets
   # This hack enables us to view the web pages
   # from within the uninstalled build tree
-  configure_file(input: file, output: file, copy: true)
+  if meson.version().version_compare('>=0.64.0')
+    fs.copyfile(file)
+  else
+    configure_file(input: file, output: file, copy: true)
+  endif
 
   install_web_files += '@0@:@1@'.format(meson.current_source_dir() / file, docs_html_dir)
 endforeach

meson.build

@@ -11,6 +11,9 @@ project(
   ],
 )
 
+if meson.version().version_compare('>=0.64.0')
+  fs = import('fs')
+endif
 
 # figure out if we are building from git
 

src/locking/meson.build

@@ -174,7 +174,7 @@ if conf.has('WITH_LIBVIRTD')
     qemu_lockd_conf = configure_file(
       input: 'lockd.conf',
       output: 'qemu-lockd.conf',
-      copy: true,
+      configuration: configmake_conf,
     )
     virt_conf_files += qemu_lockd_conf
     virt_test_aug_files += {
@@ -191,7 +191,7 @@ if conf.has('WITH_LIBVIRTD')
     libxl_lockd_conf = configure_file(
       input: 'lockd.conf',
       output: 'libxl-lockd.conf',
-      copy: true,
+      configuration: configmake_conf,
     )
     virt_conf_files += libxl_lockd_conf
   endif
@@ -203,7 +203,7 @@ if conf.has('WITH_LIBVIRTD')
       qemu_sanlock_conf = configure_file(
         input: 'sanlock.conf',
         output: 'qemu-sanlock.conf',
-        copy: true,
+        configuration: configmake_conf,
       )
       virt_conf_files += qemu_sanlock_conf
       virt_test_aug_files += {
@@ -220,7 +220,7 @@ if conf.has('WITH_LIBVIRTD')
       libxl_sanlock_conf = configure_file(
         input: 'sanlock.conf',
         output: 'libxl-sanlock.conf',
-        copy: true,
+        configuration: configmake_conf,
       )
       virt_conf_files += libxl_sanlock_conf
     endif

src/network/meson.build

@@ -84,7 +84,7 @@ if conf.has('WITH_NETWORK')
   configure_file(
     input: 'default.xml.in',
     output: '@BASENAME@',
-    copy: true,
+    configuration: configmake_conf,
     install: true,
     install_dir: confdir / 'qemu' / 'networks',
   )