[PATCH v3 1/2] doc: copy custom CSS on guides build

[Thomas Monjalon <thomas@monjalon.net>]

The custom CSS file for Sphinx guides was copied during install,
but not during build time.
Before switching to Meson, the Makefile was copying this file
in the build steps, so the doc was complete and viewable
from the build directory.

It is especially useful to get full documentation in the build directory
when building only documentation with "ninja -C build doc".
The command "ninja install" was required to get the CSS file installed,
but it requires to build the libraries as well.

The CSS file is now copied as part of the Sphinx build script,
and it will be installed as part of the whole html directory.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Ferruh Yigit <ferruh.yigit@amd.com>
---
v2: create destination directory in case RtD theme is unavailable
v3: no change
---
 buildtools/call-sphinx-build.py | 10 ++++++++++
 doc/guides/meson.build          |  2 --
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/buildtools/call-sphinx-build.py b/buildtools/call-sphinx-build.py
index da19e950c9..623e7363ee 100755
--- a/buildtools/call-sphinx-build.py
+++ b/buildtools/call-sphinx-build.py
@@ -3,6 +3,8 @@
 # Copyright(c) 2019 Intel Corporation
 #
 
+import filecmp
+import shutil
 import sys
 import os
 from os.path import join
@@ -30,4 +32,12 @@
 with open(join(dst, '.html.d'), 'w') as d:
     d.write('html: ' + ' '.join(srcfiles) + '\n')
 
+# copy custom CSS file
+css = 'custom.css'
+src_css = join(src, css)
+dst_css = join(dst, 'html', '_static', 'css', css)
+if not os.path.exists(dst_css) or not filecmp.cmp(src_css, dst_css):
+    os.makedirs(os.path.dirname(dst_css), exist_ok=True)
+    shutil.copyfile(src_css, dst_css)
+
 sys.exit(process.returncode)
diff --git a/doc/guides/meson.build b/doc/guides/meson.build
index 51f81da2e3..f8bbfba9f5 100644
--- a/doc/guides/meson.build
+++ b/doc/guides/meson.build
@@ -24,7 +24,5 @@ html_guides = custom_target('html_guides',
         install: get_option('enable_docs'),
         install_dir: htmldir)
 
-install_data(files('custom.css'), install_dir: join_paths(htmldir,'_static', 'css'))
-
 doc_targets += html_guides
 doc_target_names += 'HTML_Guides'
-- 
2.45.0