build: small fixes & enhancementsn-peugnet-build-fixes

- rename LANGUAGE exported env var to LOCAL, not to disturb Make messages
- remove failing sphinx commands
- remove quotes around BUILDDIR and SOURCEDIR as these will never have spaces
- share doctrees for localized builders for perf. This also fixes warning for epub
  about .doctrees unknown mimetype
- fix LaTeX paper size to always use A4
- fix today format to use a localized version

1 files changed, 13 insertions, 1 deletions

diff --git a/conf.py b/conf.py
index 77fa4a2..d17c5fd 100644
--- a/conf.py
+++ b/conf.py
@@ -51,7 +51,7 @@ templates_path = ['_templates']
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = os.environ['LANGUAGE']
+language = os.environ['LOCALE']
 
 # Set by make.
 languages = os.environ['LANGUAGES'].split(' ')
@@ -81,6 +81,9 @@ image_converter_args = ['-density', '250', '-resize', '230%']
 # Disable smart quotes at Sphinx level, as it is done by MyST.
 smartquotes = False
 
+# Date formats for today, for instance in LaTeX.
+# Use locale’s appropriate date representation.
+today_fmt = '%x'
 
 # -- Options for HTML output -------------------------------------------------
 
@@ -119,7 +122,16 @@ html_static_path = ['_static']
 # The domain is used for code documentation, so no need for it here.
 primary_domain = None
 
+
 # -- Options for MAN output --------------------------------------------------
 
 # Show URLs after text in MAN output.
 man_show_urls = True
+
+
+# -- Options for LATEX output ------------------------------------------------
+
+# Always use A4 paper.
+latex_elements = {
+    'papersize': 'a4paper',
+}