[dpdk-dev] [PATCH] doc: improve HTML spacing in release notes

[Thomas Monjalon <thomas@monjalon.net>]

Vertical spacing is lower before an item title than after.
So the items with paragraphs are not well separated.

A custom CSS is added to override the rtd theme.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 doc/guides/conf.py    | 2 ++
 doc/guides/custom.css | 7 +++++++
 mk/rte.sdkdoc.mk      | 8 +++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 doc/guides/custom.css

diff --git a/doc/guides/conf.py b/doc/guides/conf.py
index 77d93acf1..cf06f2572 100644
--- a/doc/guides/conf.py
+++ b/doc/guides/conf.py
@@ -391,3 +391,5 @@ def setup(app):
         app.add_role('numref', numref_role)
         # Process the numref references once the doctree has been created.
         app.connect('doctree-resolved', process_numref)
+
+    app.add_stylesheet('css/custom.css')
diff --git a/doc/guides/custom.css b/doc/guides/custom.css
new file mode 100644
index 000000000..fe9fee3ca
--- /dev/null
+++ b/doc/guides/custom.css
@@ -0,0 +1,7 @@
+/* These custom CSS rules override readthedocs theme */
+
+/* Spacing before a list item must be bigger than spacing inside the item.
+ * Complex list items start with a p.first element. */
+.section li > .first {
+	margin-top: 18px;
+}
diff --git a/mk/rte.sdkdoc.mk b/mk/rte.sdkdoc.mk
index de31b78cf..bce57c5da 100644
--- a/mk/rte.sdkdoc.mk
+++ b/mk/rte.sdkdoc.mk
@@ -117,7 +117,13 @@ guides-pdf-%:
 	$(Q)mv $(RTE_OUTPUT)/doc/pdf/guides/$*/doc.pdf \
 		$(RTE_OUTPUT)/doc/pdf/guides/$*.pdf
 
-guides-%:
+guides-html-prepare:
+	$(Q)install -D -m0644 $(RTE_SDK)/doc/guides/custom.css \
+		$(RTE_OUTPUT)/doc/html/guides/_static/css/custom.css
+
+guides-%-prepare: ;
+
+guides-%: guides-%-prepare
 	@echo 'sphinx processing $@...'
 	$(Q)$(RTE_SPHINX_BUILD) -b $* $(RTE_SPHINX_VERBOSE) \
 		-c $(RTE_SDK)/doc/guides $(RTE_SDK)/doc/guides \
-- 
2.15.1