Add Mkdocs API site (#8133)

* Add MkDocs API site

9 files changed, 192 insertions, 5 deletions

diff --git a/.gitignore b/.gitignore
index 6591b84bc..ca03604d4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-## Editors and Development environments
+## Editors and development environments
 *~
 *.swp
 *.bak*
@@ -25,7 +25,7 @@ gtags.files
 # Codelite
 *.project
 
-## Files related to minetest development cycle
+## Files related to Minetest development cycle
 /*.patch
 *.diff
 # GNU Patch reject file
@@ -54,7 +54,7 @@ gtags.files
 minetest.conf
 debug.txt
 
-## Other files generated by minetest
+## Other files generated by Minetest
 screenshot_*.png
 testbm.txt
 
@@ -63,6 +63,11 @@ doc/Doxyfile
 doc/html/
 doc/doxygen_*
 
+## MkDocs files
+public/
+doc/mkdocs/docs/*.md
+doc/mkdocs/mkdocs.yml
+
 ## Build files
 CMakeFiles
 Makefile
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b957fdb32..dbc532090 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -322,3 +322,19 @@ package:docker:
     - docker push ${CONTAINER_IMAGE}/server:$CI_COMMIT_SHA
     - docker push ${CONTAINER_IMAGE}/server:$CI_COMMIT_REF_NAME
     - docker push ${CONTAINER_IMAGE}/server:latest
+
+pages:
+  stage: deploy
+  image: python:3.7
+  before_script:
+    - pip install pip==18.1
+    - pip install git+https://github.com/Python-Markdown/markdown.git
+    - pip install git+https://github.com/mkdocs/mkdocs.git
+    - pip install pygments
+  script:
+    - cd doc/mkdocs && ./build.sh
+  artifacts:
+    paths:
+      - public
+  only:
+    - master
diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index 41e8e0c96..870daba02 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -4,9 +4,8 @@ Minetest Lua Modding API Reference
 * More information at <http://www.minetest.net/>
 * Developer Wiki: <http://dev.minetest.net/>
 
-
 Introduction
-============
+------------
 
 Content and functionality can be added to Minetest using Lua scripting
 in run-time loaded mods.
diff --git a/doc/mkdocs/build.sh b/doc/mkdocs/build.sh
new file mode 100755
index 000000000..48ffbbad1
--- /dev/null
+++ b/doc/mkdocs/build.sh
@@ -0,0 +1,43 @@
+#!/bin/sh -e
+
+# Patch Pygments and Python-Markdown
+PYGMENTS_FILE=$(pip show pygments | awk '/Location/ { print $2 }')/pygments/formatters/html.py
+MARKDOWN_FILE=$(pip show markdown | awk '/Location/ { print $2 }')/markdown/extensions/codehilite.py
+patch -N -r - $PYGMENTS_FILE code_tag.patch || true
+patch -N -r - $MARKDOWN_FILE lua_highlight.patch || true
+
+# Split lua_api.txt on top level headings
+cat ../lua_api.txt | csplit -sz -f docs/section - '/^=/-1' '{*}'
+
+cat > mkdocs.yml << EOF
+site_name: Minetest API Documentation
+theme:
+    name: readthedocs
+    highlightjs: False
+extra_css:
+    - css/code_styles.css
+    - css/extra.css
+markdown_extensions:
+    - toc:
+        permalink: True
+    - codehilite
+plugins:
+    - search:
+        separator: '[\s\-\.\(]+'
+nav:
+- "Home": index.md
+EOF
+
+mv docs/section00 docs/index.md
+
+for f in docs/section*
+do
+	title=$(head -1 $f)
+	fname=$(echo $title | tr '[:upper:]' '[:lower:]')
+	fname=$(echo $fname | sed 's/ /-/g')
+	fname=$(echo $fname | sed "s/'//g").md
+	mv $f docs/$fname
+	echo "- \"$title\": $fname" >> mkdocs.yml
+done
+
+mkdocs build --site-dir ../../public
diff --git a/doc/mkdocs/code_tag.patch b/doc/mkdocs/code_tag.patch
new file mode 100644
index 000000000..3148bc2ae
--- /dev/null
+++ b/doc/mkdocs/code_tag.patch
@@ -0,0 +1,31 @@
+@@ -691,7 +691,7 @@
+             yield tup
+         yield 0, '</div>\n'
+ 
+-    def _wrap_pre(self, inner):
++    def _wrap_pre_code(self, inner):
+         style = []
+         if self.prestyles:
+             style.append(self.prestyles)
+@@ -704,10 +704,10 @@
+ 
+         # the empty span here is to keep leading empty lines from being
+         # ignored by HTML parsers
+-        yield 0, ('<pre' + (style and ' style="%s"' % style) + '><span></span>')
++        yield 0, ('<pre' + (style and ' style="%s"' % style) + '><code><span></span>')
+         for tup in inner:
+             yield tup
+-        yield 0, '</pre>'
++        yield 0, '</code></pre>'
+ 
+     def _format_lines(self, tokensource):
+         """
+@@ -815,7 +815,7 @@
+         individual lines, in custom generators. See docstring
+         for `format`. Can be overridden.
+         """
+-        return self._wrap_div(self._wrap_pre(source))
++        return self._wrap_div(self._wrap_pre_code(source))
+ 
+     def format_unencoded(self, tokensource, outfile):
+         """
diff --git a/doc/mkdocs/docs/css/code_styles.css b/doc/mkdocs/docs/css/code_styles.css
new file mode 100644
index 000000000..c135acd94
--- /dev/null
+++ b/doc/mkdocs/docs/css/code_styles.css
@@ -0,0 +1,68 @@
+.codehilite .hll { background-color: #ffffcc }
+.codehilite .c { color: #408080; font-style: italic } /* Comment */
+/* .codehilite .err { border: 1px solid #FF0000 } /* Error */
+.codehilite .k { color: #008000; font-weight: bold } /* Keyword */
+.codehilite .o { color: #666666 } /* Operator */
+.codehilite .ch { color: #408080; font-style: italic } /* Comment.Hashbang */
+.codehilite .cm { color: #408080; font-style: italic } /* Comment.Multiline */
+.codehilite .cp { color: #BC7A00 } /* Comment.Preproc */
+.codehilite .cpf { color: #408080; font-style: italic } /* Comment.PreprocFile */
+.codehilite .c1 { color: #408080; font-style: italic } /* Comment.Single */
+.codehilite .cs { color: #408080; font-style: italic } /* Comment.Special */
+.codehilite .gd { color: #A00000 } /* Generic.Deleted */
+.codehilite .ge { font-style: italic } /* Generic.Emph */
+.codehilite .gr { color: #FF0000 } /* Generic.Error */
+.codehilite .gh { color: #000080; font-weight: bold } /* Generic.Heading */
+.codehilite .gi { color: #00A000 } /* Generic.Inserted */
+.codehilite .go { color: #888888 } /* Generic.Output */
+.codehilite .gp { color: #000080; font-weight: bold } /* Generic.Prompt */
+.codehilite .gs { font-weight: bold } /* Generic.Strong */
+.codehilite .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
+.codehilite .gt { color: #0044DD } /* Generic.Traceback */
+.codehilite .kc { color: #008000; font-weight: bold } /* Keyword.Constant */
+.codehilite .kd { color: #008000; font-weight: bold } /* Keyword.Declaration */
+.codehilite .kn { color: #008000; font-weight: bold } /* Keyword.Namespace */
+.codehilite .kp { color: #008000 } /* Keyword.Pseudo */
+.codehilite .kr { color: #008000; font-weight: bold } /* Keyword.Reserved */
+.codehilite .kt { color: #B00040 } /* Keyword.Type */
+.codehilite .m { color: #666666 } /* Literal.Number */
+.codehilite .s { color: #BA2121 } /* Literal.String */
+.codehilite .na { color: #7D9029 } /* Name.Attribute */
+.codehilite .nb { color: #008000 } /* Name.Builtin */
+.codehilite .nc { color: #0000FF; font-weight: bold } /* Name.Class */
+.codehilite .no { color: #880000 } /* Name.Constant */
+.codehilite .nd { color: #AA22FF } /* Name.Decorator */
+.codehilite .ni { color: #999999; font-weight: bold } /* Name.Entity */
+.codehilite .ne { color: #D2413A; font-weight: bold } /* Name.Exception */
+.codehilite .nf { color: #0000FF } /* Name.Function */
+.codehilite .nl { color: #A0A000 } /* Name.Label */
+.codehilite .nn { color: #0000FF; font-weight: bold } /* Name.Namespace */
+.codehilite .nt { color: #008000; font-weight: bold } /* Name.Tag */
+.codehilite .nv { color: #19177C } /* Name.Variable */
+.codehilite .ow { color: #AA22FF; font-weight: bold } /* Operator.Word */
+.codehilite .w { color: #bbbbbb } /* Text.Whitespace */
+.codehilite .mb { color: #666666 } /* Literal.Number.Bin */
+.codehilite .mf { color: #666666 } /* Literal.Number.Float */
+.codehilite .mh { color: #666666 } /* Literal.Number.Hex */
+.codehilite .mi { color: #666666 } /* Literal.Number.Integer */
+.codehilite .mo { color: #666666 } /* Literal.Number.Oct */
+.codehilite .sa { color: #BA2121 } /* Literal.String.Affix */
+.codehilite .sb { color: #BA2121 } /* Literal.String.Backtick */
+.codehilite .sc { color: #BA2121 } /* Literal.String.Char */
+.codehilite .dl { color: #BA2121 } /* Literal.String.Delimiter */
+.codehilite .sd { color: #BA2121; font-style: italic } /* Literal.String.Doc */
+.codehilite .s2 { color: #BA2121 } /* Literal.String.Double */
+.codehilite .se { color: #BB6622; font-weight: bold } /* Literal.String.Escape */
+.codehilite .sh { color: #BA2121 } /* Literal.String.Heredoc */
+.codehilite .si { color: #BB6688; font-weight: bold } /* Literal.String.Interpol */
+.codehilite .sx { color: #008000 } /* Literal.String.Other */
+.codehilite .sr { color: #BB6688 } /* Literal.String.Regex */
+.codehilite .s1 { color: #BA2121 } /* Literal.String.Single */
+.codehilite .ss { color: #19177C } /* Literal.String.Symbol */
+.codehilite .bp { color: #008000 } /* Name.Builtin.Pseudo */
+.codehilite .fm { color: #0000FF } /* Name.Function.Magic */
+.codehilite .vc { color: #19177C } /* Name.Variable.Class */
+.codehilite .vg { color: #19177C } /* Name.Variable.Global */
+.codehilite .vi { color: #19177C } /* Name.Variable.Instance */
+.codehilite .vm { color: #19177C } /* Name.Variable.Magic */
+.codehilite .il { color: #666666 } /* Literal.Number.Integer.Long */
diff --git a/doc/mkdocs/docs/css/extra.css b/doc/mkdocs/docs/css/extra.css
new file mode 100644
index 000000000..8fde9f893
--- /dev/null
+++ b/doc/mkdocs/docs/css/extra.css
@@ -0,0 +1,15 @@
+/* Fix partly obscured last TOC element */
+.wy-menu {
+  padding-bottom: 20px;
+}
+
+/* Use Minetest green instead of blue */
+.wy-nav-content a {
+  color: hsl(100, 40%, 40%);
+}
+.wy-nav-content a:hover {
+  color: hsl(100, 30%, 30%);
+}
+.wy-side-nav-search, .wy-nav-top, .wy-menu-vertical a:active {
+  background: hsl(100, 40%, 40%);
+}
diff --git a/doc/mkdocs/docs/img/favicon.ico b/doc/mkdocs/docs/img/favicon.ico
new file mode 120000
index 000000000..cac34a30c
--- /dev/null
+++ b/doc/mkdocs/docs/img/favicon.ico
@@ -0,0 +1 @@
+../../../../misc/minetest-icon.ico
\ No newline at end of file
diff --git a/doc/mkdocs/lua_highlight.patch b/doc/mkdocs/lua_highlight.patch
new file mode 100644
index 000000000..bd97612e5
--- /dev/null
+++ b/doc/mkdocs/lua_highlight.patch
@@ -0,0 +1,9 @@
+@@ -77,7 +77,7 @@
+                  css_class="codehilite", lang=None, style='default',
+                  noclasses=False, tab_length=4, hl_lines=None, use_pygments=True):
+         self.src = src
+-        self.lang = lang
++        self.lang = "lua"
+         self.linenums = linenums
+         self.guess_lang = guess_lang
+         self.css_class = css_class