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Subject[PATCH v3 1/9] docs: pdfdocs: Refactor config for CJK document
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To make generated LaTeX code portable across systems with different sets
of available fonts, convert font-availability check in python code to
LaTeX code by using a conditional command provided by the "fontspec"
package.

This will help those who run Sphinx on one machine/container and run
latexmk on other machines/containers.

Remove import of check_output as it is unused any more.

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
---
Documentation/conf.py | 22 +++++++++-------------
1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/Documentation/conf.py b/Documentation/conf.py
index 7d92ec3e5b6e..b440cb606d22 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -16,8 +16,6 @@ import sys
import os
import sphinx

-from subprocess import check_output
-
# Get Sphinx version
major, minor, patch = sphinx.version_info[:3]

@@ -355,15 +353,14 @@ latex_elements = {
''',
}

-# At least one book (translations) may have Asian characters
-# with are only displayed if xeCJK is used
+# Translations have Asian (CJK) characters which are only displayed if
+# xeCJK is used

-cjk_cmd = check_output(['fc-list', '--format="%{family[0]}\n"']).decode('utf-8', 'ignore')
-if cjk_cmd.find("Noto Sans CJK SC") >= 0:
- latex_elements['preamble'] += '''
+latex_elements['preamble'] += '''
+ \\IfFontExistsTF{Noto Sans CJK SC}{
% This is needed for translations
- \\usepackage{xeCJK}
- \\setCJKmainfont{Noto Sans CJK SC}
+ \\usepackage{xeCJK}
+ \\setCJKmainfont{Noto Sans CJK SC}
% Define custom macros to on/off CJK
\\newcommand{\\kerneldocCJKon}{\\makexeCJKactive}
\\newcommand{\\kerneldocCJKoff}{\\makexeCJKinactive}
@@ -371,13 +368,12 @@ if cjk_cmd.find("Noto Sans CJK SC") >= 0:
\\usepackage{etoolbox}
% Inactivate CJK after tableofcontents
\\apptocmd{\\sphinxtableofcontents}{\\kerneldocCJKoff}{}{}
- '''
-else:
- latex_elements['preamble'] += '''
+ }{ % No CJK font found
% Custom macros to on/off CJK (Dummy)
\\newcommand{\\kerneldocCJKon}{}
\\newcommand{\\kerneldocCJKoff}{}
- '''
+ }
+'''

# Fix reference escape troubles with Sphinx 1.4.x
if major == 1:
--
2.17.1

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