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c0d1e41313
Recent synopsis changes move from literal code blocks to [RST line blocks]. This does not translate well to HTML: it's not rendered in monospace, so aligment is lost. Additionally, we don't get syntax highlighting in HTML, which adds differences to our code samples which are highlighted. We hard-wrap synopsis lines (like code blocks). To align continuation lines in manpages we need [backslashes in weird places]. Combined with the **, *, and `` markup, it's a bit hard to get the alignment right. Fix these by moving synopsis sources back to code blocks and compute HTML syntax highlighting and manpage markup with a custom Sphinx extension. The new Pygments lexer can tokenize a synopsis and assign the various highlighting roles, which closely matches fish's syntax highlighing: - command/keyword (dark blue) - parameter (light blue) - operator like and/or/not/&&/|| (cyan) - grammar metacharacter (black) For manpage output, we don't project the fish syntax highlighting but follow the markup convention in GNU's man(1): bold text type exactly as shown. italic text replace with appropriate argument. To make it easy to separate these two automatically, formalize that (italic) placeholders must be uppercase; while all lowercase text is interpreted literally (so rendered bold). This makes manpages more consistent, see string-join(1) and and(1). Implementation notes: Since we want manpage formatting but Sphinx's Pygments highlighing plugin does not support manpage output, add our custom "synopsis" directive. This directive parses differently when manpage output is specified. This means that the HTML and manpage build processes must not share a cache, because the parsed doctrees are cached. Work around this by using separate cache locations for build targets "sphinx-docs" (which creates HTML) and "sphinx-manpages". A better solution would be to only override Sphinx's ManualPageBuilder but that would take a bit more code (ideally we could override ManualPageWriter but Sphinx 4.3.2 doesn't really support that). --- Alternative solution: stick with line blocks but use roles like :command: or :option: (or custom ones). While this would make it possible to produce HTML that is consistent with code blocks (by adding a bit of CSS), the source would look uglier and is harder to maintain. (Let's say we want to add custom formatting to the [|] metacharacters in HTML. This is much easier with the proposed patch.) --- [RST line blocks]: https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#line-blocks [backslashes in weird places]: https://github.com/fish-shell/fish-shell/pull/8626#discussion_r782837750
87 lines
2.9 KiB
CMake
87 lines
2.9 KiB
CMake
find_program(SPHINX_EXECUTABLE NAMES sphinx-build
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HINTS
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$ENV{SPHINX_DIR}
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PATH_SUFFIXES bin
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DOC "Sphinx documentation generator")
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include(FeatureSummary)
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set(SPHINX_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/doc_src")
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set(SPHINX_ROOT_DIR "${CMAKE_CURRENT_BINARY_DIR}/user_doc")
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set(SPHINX_BUILD_DIR "${SPHINX_ROOT_DIR}/build")
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set(SPHINX_HTML_DIR "${SPHINX_ROOT_DIR}/html")
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set(SPHINX_MANPAGE_DIR "${SPHINX_ROOT_DIR}/man")
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# sphinx-docs uses fish_indent for highlighting.
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# Prepend the output dir of fish_indent to PATH.
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add_custom_target(sphinx-docs
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mkdir -p ${SPHINX_HTML_DIR}/_static/
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COMMAND env PATH="$<TARGET_FILE_DIR:fish_indent>:$$PATH"
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${SPHINX_EXECUTABLE}
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-j auto
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-q -b html
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-c "${SPHINX_SRC_DIR}"
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-d "${SPHINX_ROOT_DIR}/.doctrees-html"
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"${SPHINX_SRC_DIR}"
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"${SPHINX_HTML_DIR}"
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DEPENDS ${SPHINX_SRC_DIR}/fish_indent_lexer.py fish_indent
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COMMENT "Building HTML documentation with Sphinx")
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# sphinx-manpages needs the fish_indent binary for the version number
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add_custom_target(sphinx-manpages
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env PATH="$<TARGET_FILE_DIR:fish_indent>:$$PATH"
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${SPHINX_EXECUTABLE}
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-j auto
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-q -b man
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-c "${SPHINX_SRC_DIR}"
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-d "${SPHINX_ROOT_DIR}/.doctrees-man"
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"${SPHINX_SRC_DIR}"
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# TODO: This only works if we only have section 1 manpages.
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"${SPHINX_MANPAGE_DIR}/man1"
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DEPENDS fish_indent
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COMMENT "Building man pages with Sphinx")
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if(SPHINX_EXECUTABLE)
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option(BUILD_DOCS "build documentation (requires Sphinx)" ON)
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else(SPHINX_EXECUTABLE)
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option(BUILD_DOCS "build documentation (requires Sphinx)" OFF)
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endif(SPHINX_EXECUTABLE)
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if(BUILD_DOCS AND NOT SPHINX_EXECUTABLE)
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message(FATAL_ERROR "build documentation selected, but sphinx-build could not be found")
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endif()
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if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/user_doc/html
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AND IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/user_doc/man)
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set(HAVE_PREBUILT_DOCS TRUE)
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else()
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set(HAVE_PREBUILT_DOCS FALSE)
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endif()
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if(BUILD_DOCS OR HAVE_PREBUILT_DOCS)
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set(INSTALL_DOCS ON)
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else()
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set(INSTALL_DOCS OFF)
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endif()
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add_feature_info(Documentation INSTALL_DOCS "user manual and documentation")
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if(BUILD_DOCS)
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configure_file("${SPHINX_SRC_DIR}/conf.py" "${SPHINX_BUILD_DIR}/conf.py" @ONLY)
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add_custom_target(doc ALL
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DEPENDS sphinx-docs sphinx-manpages)
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# Group docs targets into a DocsTargets folder
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set_property(TARGET doc sphinx-docs sphinx-manpages
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PROPERTY FOLDER cmake/DocTargets)
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elseif(HAVE_PREBUILT_DOCS)
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if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
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# Out of tree build - link the prebuilt documentation to the build tree
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add_custom_target(link_doc ALL)
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add_custom_command(TARGET link_doc
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COMMAND ${CMAKE_COMMAND} -E create_symlink ${CMAKE_CURRENT_SOURCE_DIR}/user_doc ${CMAKE_CURRENT_BINARY_DIR}/user_doc
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POST_BUILD)
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endif()
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endif(BUILD_DOCS)
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