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doc: make pygmentize optional at build time

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If pygmentize is not found, the build now emits a CMake warning and
proceeds with an empty dark theme stylesheet rather than aborting.
A non-zero exit from pygmentize is also downgraded from SEND_ERROR to
WARNING for the same reason. This restores the pre-existing behavior
where the documentation could be built without any pygments tooling
installed (Asciidoctor then renders code blocks as plain text).
This commit is contained in:
Sébastien Helleu
2026-05-24 18:03:12 +02:00
parent bf7b8484cd
commit 73cf57742e
1 changed files with 14 additions and 8 deletions
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doc/CMakeLists.txt
+8 -2
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@@ -40,14 +40,20 @@ if(ENABLE_MAN OR ENABLE_DOC)
# is generated below and scoped via @media in docinfo.html.in.
set(PYGMENTS_LIGHT_STYLE "default")
set(PYGMENTS_DARK_STYLE "monokai")
find_program(PYGMENTIZE_EXECUTABLE pygmentize REQUIRED)
find_program(PYGMENTIZE_EXECUTABLE pygmentize)
set(PYGMENTS_DARK_CSS "")
if(PYGMENTIZE_EXECUTABLE)
execute_process(
COMMAND "${PYGMENTIZE_EXECUTABLE}" -O "classprefix=tok-" -f html -a "pre.pygments" -S "${PYGMENTS_DARK_STYLE}"
OUTPUT_VARIABLE PYGMENTS_DARK_CSS
RESULT_VARIABLE _pygmentize_result
)
if(NOT _pygmentize_result EQUAL 0)
message(SEND_ERROR "Failed to generate pygments CSS for dark theme (style: ${PYGMENTS_DARK_STYLE})")
message(WARNING "Failed to generate pygments CSS for dark theme (style: ${PYGMENTS_DARK_STYLE}); doc will be built without dark theme syntax highlighting")
set(PYGMENTS_DARK_CSS "")
endif()
else()
message(WARNING "pygmentize not found (install python3-pygments); doc will be built without syntax highlighting colors")
endif()
configure_file(
"${CMAKE_CURRENT_SOURCE_DIR}/docinfo.html.in"