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feat(treesitter): add injection language fallback (#24659)

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* feat(treesitter): add injection language fallback

Problem: injection languages are often specified via aliases (e.g.,
filetype or in upper case), requiring custom directives.

Solution: include lookup logic (try as parser name, then filetype, then
lowercase) in LanguageTree itself and remove `#inject-language`
directive.

Co-authored-by: Lewis Russell <me@lewisr.dev>
This commit is contained in:
Christian Clason
2023-08-11 17:05:17 +02:00
committed by GitHub
parent 72e64a1afe
commit 31c4ed26bc
6 changed files with 39 additions and 54 deletions
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27
runtime/lua/vim/treesitter/query.lua
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@@ -541,33 +541,6 @@ local directive_handlers = {
metadata.range = { start_row, start_col, end_row, end_col }
end
end,
-- Set injection language from node text, interpreted first as language and then as filetype
-- Example: (#inject-language! @_lang)
['inject-language!'] = function(match, _, bufnr, pred, metadata)
local id = pred[2]
local node = match[id]
if not node then
return
end
-- TODO(clason): replace by refactored `ts.has_parser` API
local has_parser = function(lang)
return vim._ts_has_language(lang)
or #vim.api.nvim_get_runtime_file('parser/' .. lang .. '.*', false) > 0
end
local alias = vim.treesitter.get_node_text(node, bufnr, { metadata = metadata[id] })
if not alias then
return
elseif has_parser(alias) then
metadata['injection.language'] = alias
else
local lang = vim.treesitter.language.get_lang(alias)
if lang and has_parser(lang) then
metadata['injection.language'] = lang
end
end
end,
}
--- Adds a new predicate to be used in queries