124 lines
3.2 KiB
Lua
124 lines
3.2 KiB
Lua
---@class fugitive-ts.Hunk
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---@field filename string
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---@field ft string?
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---@field lang string?
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---@field start_line integer
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---@field header_context string?
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---@field header_context_col integer?
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---@field lines string[]
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local M = {}
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local dbg = require('fugitive-ts.log').dbg
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---@param filename string
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---@return string?
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local function get_ft_from_filename(filename)
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local ft = vim.filetype.match({ filename = filename })
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if not ft then
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dbg('no filetype for: %s', filename)
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end
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return ft
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end
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---@param ft string
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---@return string?
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local function get_lang_from_ft(ft)
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local lang = vim.treesitter.language.get_lang(ft)
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if lang then
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local ok = pcall(vim.treesitter.language.inspect, lang)
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if ok then
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return lang
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end
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dbg('no parser for lang: %s (ft: %s)', lang, ft)
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else
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dbg('no ts lang for filetype: %s', ft)
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end
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return nil
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end
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---@param bufnr integer
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---@return fugitive-ts.Hunk[]
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function M.parse_buffer(bufnr)
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local lines = vim.api.nvim_buf_get_lines(bufnr, 0, -1, false)
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---@type fugitive-ts.Hunk[]
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local hunks = {}
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---@type string?
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local current_filename = nil
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---@type string?
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local current_ft = nil
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---@type string?
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local current_lang = nil
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---@type integer?
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local hunk_start = nil
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---@type string?
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local hunk_header_context = nil
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---@type integer?
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local hunk_header_context_col = nil
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---@type string[]
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local hunk_lines = {}
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local function flush_hunk()
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if hunk_start and #hunk_lines > 0 and (current_lang or current_ft) then
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table.insert(hunks, {
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filename = current_filename,
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ft = current_ft,
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lang = current_lang,
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start_line = hunk_start,
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header_context = hunk_header_context,
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header_context_col = hunk_header_context_col,
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lines = hunk_lines,
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})
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end
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hunk_start = nil
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hunk_header_context = nil
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hunk_header_context_col = nil
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hunk_lines = {}
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end
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for i, line in ipairs(lines) do
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local filename = line:match('^[MADRC%?!]%s+(.+)$') or line:match('^diff %-%-git a/.+ b/(.+)$')
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if filename then
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flush_hunk()
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current_filename = filename
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current_ft = get_ft_from_filename(filename)
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current_lang = current_ft and get_lang_from_ft(current_ft) or nil
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if current_lang then
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dbg('file: %s -> lang: %s', filename, current_lang)
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elseif current_ft then
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dbg('file: %s -> ft: %s (no ts parser)', filename, current_ft)
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end
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elseif line:match('^@@.-@@') then
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flush_hunk()
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hunk_start = i
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local prefix, context = line:match('^(@@.-@@%s*)(.*)')
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if context and context ~= '' then
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hunk_header_context = context
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hunk_header_context_col = #prefix
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end
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elseif hunk_start then
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local prefix = line:sub(1, 1)
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if prefix == ' ' or prefix == '+' or prefix == '-' then
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table.insert(hunk_lines, line)
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elseif
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line == ''
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or line:match('^[MADRC%?!]%s+')
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or line:match('^diff ')
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or line:match('^index ')
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or line:match('^Binary ')
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then
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flush_hunk()
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current_filename = nil
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current_ft = nil
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current_lang = nil
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end
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end
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end
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flush_hunk()
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return hunks
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end
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return M
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