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@@ -49,3 +49,39 @@ To run the unit tests:
```
./build-cmake/ninja_test
```
+
+## Generating documentation
+
+### Ninja Manual
+
+You must have `asciidoc` and `xsltproc` in your PATH, then do:
+
+```
+./configure.py
+ninja manual doc/manual.pdf
+```
+
+Which will generate `doc/manual.html`.
+
+To generate the PDF version of the manual, you must have `dblatext` in your PATH then do:
+
+```
+./configure.py # only if you didn't do it previously.
+ninja doc/manual.pdf
+```
+
+Which will generate `doc/manual.pdf`.
+
+### Doxygen documentation
+
+If you have `doxygen` installed, you can build documentation extracted from C++
+declarations and comments to help you navigate the code. Note that Ninja is a standalone
+executable, not a library, so there is no public API, all details exposed here are
+internal.
+
+```
+./configure.py # if needed
+ninja doxygen
+```
+
+Then open `doc/doxygen/html/index.html` in a browser to look at it.