Add basic highlighting for meson

rc/filetype/meson.kak

@@ -0,0 +1,50 @@
+# meson syntax highlighting for kakoune (https://mesonbuild.com)
+#
+# For reference see:
+# https://mesonbuild.com/Syntax.html
+# https://github.com/mesonbuild/meson/blob/master/data/syntax-highlighting/vim/syntax/meson.vim
+
+## Detection
+
+hook global BufCreate (.*/|^)meson\.build %{
+  set-option buffer filetype meson
+}
+
+## Initialization
+
+hook -group meson-highlight global WinSetOption filetype=meson %{
+    require-module meson
+    add-highlighter window/meson ref meson
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/meson }
+}
+
+provide-module meson %§
+
+## Highlighters
+
+add-highlighter shared/meson regions
+add-highlighter shared/meson/code default-region group
+
+add-highlighter shared/meson/comment region '(\h|^)#' '$' fill comment
+
+# TODO: highlight escape sequences within strings
+add-highlighter shared/meson/string_multiline region "'''" "'''" fill string
+add-highlighter shared/meson/string_single    region "'" (?<!\\)(\\\\)*' fill string
+
+# control flow
+add-highlighter shared/meson/code/ regex '\b(?:if|else|endif|elif|foreach|endforeach|break|continue)\b' 0:keyword
+
+# primitive values
+add-highlighter shared/meson/code/ regex '\b(?:true|false)\b' 0:value
+
+# integer literals
+add-highlighter shared/meson/code/ regex '\b\d+\b' 0:value
+
+# operators
+add-highlighter shared/meson/code/ regex '(?:\+|-|\*|/|%|!=|=|<|>|\?|:)' 0:operator
+add-highlighter shared/meson/code/ regex '\b(?:and|not|or|in)\b' 0:operator
+
+# functions
+add-highlighter shared/meson/code/ regex "(?:add_global_arguments|add_global_link_arguments|add_languages|add_project_arguments|add_project_link_arguments|add_test_setup|alias_target|assert|benchmark|both_libraries|build_machine|build_target|configuration_data|configure_file|custom_target|declare_dependency|dependency|disabler|environment|error|executable|files|find_library|find_program|generator|get_option|get_variable|gettext|host_machine|import|include_directories|install_data|install_headers|install_man|install_subdir|is_disabler|is_variable|jar|join_paths|library|meson|message|option|project|run_command|run_target|set_variable|shared_library|shared_module|static_library|subdir|subdir_done|subproject|summary|target_machine|test|vcs_tag|warning)\b" 0:function
+
+§