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Meta: Generate emoji.txt at build time from Unicode's emoji-test.txt

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Instead of manually updating emoji.txt whenever new emoji are added,
we use Unicode's emoji-test.txt to generate emoji.txt on each build,
including only the emojis that Serenity supports at that time.

By using emoji-test.txt, we can also include all forms of each emoji
(fully-qualified, minimally-qualified, and unqualified) which can be
helpful when double-checking how certain forms are handled.
This commit is contained in:
Ryan Liptak 2022-08-20 02:20:22 -07:00 • committed by Linus Groh
parent 8f4317e207
commit 221d9089e9
5 changed files with 86 additions and 509 deletions
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23
Meta/CMake/emoji_txt.cmake Normal file
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option(ENABLE_EMOJI_TXT_GENERATION "Enable download of emoji-test.txt and generation of emoji.txt at build time" ON)
set(EMOJI_TEST_TXT_PATH ${CMAKE_BINARY_DIR}/emoji-test.txt)
set(EMOJI_TEST_TXT_URL https://unicode.org/Public/emoji/14.0/emoji-test.txt)
if(ENABLE_EMOJI_TXT_GENERATION)
if(NOT EXISTS ${EMOJI_TEST_TXT_PATH})
file(DOWNLOAD ${EMOJI_TEST_TXT_URL} ${EMOJI_TEST_TXT_PATH})
endif()
set(EMOJI_RES_PATH "${SerenityOS_SOURCE_DIR}/Base/res/emoji")
set(EMOJI_TXT_INSTALL_PATH "${SerenityOS_SOURCE_DIR}/Base/home/anon/Documents/emoji.txt")
add_custom_command(
OUTPUT ${EMOJI_TXT_INSTALL_PATH}
COMMAND ${SerenityOS_SOURCE_DIR}/Meta/generate-emoji-txt.sh "${EMOJI_TEST_TXT_PATH}" "${EMOJI_RES_PATH}" "${EMOJI_TXT_INSTALL_PATH}"
# This will make this command only run when the modified time of the directory changes,
# which only happens if files within it are added or deleted, but not when a file is modified.
# This is fine for this use-case, because the contents of a file changing should not affect
# the generated emoji.txt file.
MAIN_DEPENDENCY ${EMOJI_RES_PATH}
USES_TERMINAL
)
add_custom_target(generate_emoji_txt ALL DEPENDS ${EMOJI_TXT_INSTALL_PATH})
endif()