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https://github.com/neovim/neovim
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Backports #24550. Adjusts test to expect that didChangeWatchedFiles is *not* registered if client `capabilities` is nil (as it's not enabled by default for v0.9).
313 lines
9.7 KiB
Lua
313 lines
9.7 KiB
Lua
local bit = require('bit')
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local watch = require('vim._watch')
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local protocol = require('vim.lsp.protocol')
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local M = {}
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---@private
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---Parses the raw pattern into a number of Lua-native patterns.
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---
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---@param pattern string The raw glob pattern
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---@return table A list of Lua patterns. A match with any of them matches the input glob pattern.
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local function parse(pattern)
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local patterns = { '' }
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local path_sep = '[/\\]'
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local non_path_sep = '[^/\\]'
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local function append(chunks)
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local new_patterns = {}
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for _, p in ipairs(patterns) do
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for _, chunk in ipairs(chunks) do
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table.insert(new_patterns, p .. chunk)
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end
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end
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patterns = new_patterns
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end
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local function split(s, sep)
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local segments = {}
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local segment = ''
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local in_braces = false
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local in_brackets = false
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for i = 1, #s do
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local c = string.sub(s, i, i)
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if c == sep and not in_braces and not in_brackets then
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table.insert(segments, segment)
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segment = ''
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else
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if c == '{' then
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in_braces = true
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elseif c == '}' then
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in_braces = false
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elseif c == '[' then
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in_brackets = true
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elseif c == ']' then
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in_brackets = false
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end
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segment = segment .. c
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end
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end
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if segment ~= '' then
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table.insert(segments, segment)
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end
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return segments
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end
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local function escape(c)
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if
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c == '?'
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or c == '.'
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or c == '('
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or c == ')'
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or c == '%'
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or c == '['
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or c == ']'
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or c == '*'
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or c == '+'
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or c == '-'
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then
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return '%' .. c
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end
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return c
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end
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local segments = split(pattern, '/')
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for i, segment in ipairs(segments) do
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local last_seg = i == #segments
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if segment == '**' then
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local chunks = {
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path_sep .. '-',
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'.-' .. path_sep,
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}
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if last_seg then
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chunks = { '.-' }
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end
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append(chunks)
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else
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local in_braces = false
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local brace_val = ''
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local in_brackets = false
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local bracket_val = ''
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for j = 1, #segment do
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local char = string.sub(segment, j, j)
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if char ~= '}' and in_braces then
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brace_val = brace_val .. char
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else
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if in_brackets and (char ~= ']' or bracket_val == '') then
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local res
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if char == '-' then
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res = char
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elseif bracket_val == '' and char == '!' then
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res = '^'
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elseif char == '/' then
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res = ''
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else
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res = escape(char)
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end
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bracket_val = bracket_val .. res
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else
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if char == '{' then
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in_braces = true
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elseif char == '[' then
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in_brackets = true
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elseif char == '}' then
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local choices = split(brace_val, ',')
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local parsed_choices = {}
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for _, choice in ipairs(choices) do
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table.insert(parsed_choices, parse(choice))
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end
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append(vim.tbl_flatten(parsed_choices))
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in_braces = false
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brace_val = ''
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elseif char == ']' then
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append({ '[' .. bracket_val .. ']' })
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in_brackets = false
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bracket_val = ''
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elseif char == '?' then
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append({ non_path_sep })
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elseif char == '*' then
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append({ non_path_sep .. '-' })
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else
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append({ escape(char) })
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end
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end
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end
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end
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if not last_seg and (segments[i + 1] ~= '**' or i + 1 < #segments) then
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append({ path_sep })
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end
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end
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end
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return patterns
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end
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---@private
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--- Implementation of LSP 3.17.0's pattern matching: https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#pattern
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--- Modeled after VSCode's implementation: https://github.com/microsoft/vscode/blob/0319eed971719ad48e9093daba9d65a5013ec5ab/src/vs/base/common/glob.ts#L509
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---
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---@param pattern string|table The glob pattern (raw or parsed) to match.
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---@param s string The string to match against pattern.
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---@return boolean Whether or not pattern matches s.
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function M._match(pattern, s)
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if type(pattern) == 'string' then
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pattern = parse(pattern)
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end
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-- Since Lua's built-in string pattern matching does not have an alternate
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-- operator like '|', `parse` will construct one pattern for each possible
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-- alternative. Any pattern that matches thus matches the glob.
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for _, p in ipairs(pattern) do
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if s:match('^' .. p .. '$') then
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return true
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end
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end
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return false
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end
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M._watchfunc = (vim.fn.has('win32') == 1 or vim.fn.has('mac') == 1) and watch.watch or watch.poll
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---@type table<number, table<number, function[]>> client id -> registration id -> cancel function
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local cancels = vim.defaulttable()
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local queue_timeout_ms = 100
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---@type table<number, uv.uv_timer_t> client id -> libuv timer which will send queued changes at its timeout
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local queue_timers = {}
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---@type table<number, lsp.FileEvent[]> client id -> set of queued changes to send in a single LSP notification
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local change_queues = {}
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---@type table<number, table<string, lsp.FileChangeType>> client id -> URI -> last type of change processed
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--- Used to prune consecutive events of the same type for the same file
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local change_cache = vim.defaulttable()
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local to_lsp_change_type = {
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[watch.FileChangeType.Created] = protocol.FileChangeType.Created,
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[watch.FileChangeType.Changed] = protocol.FileChangeType.Changed,
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[watch.FileChangeType.Deleted] = protocol.FileChangeType.Deleted,
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}
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--- Registers the workspace/didChangeWatchedFiles capability dynamically.
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---
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---@param reg table LSP Registration object.
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---@param ctx table Context from the |lsp-handler|.
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function M.register(reg, ctx)
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local client_id = ctx.client_id
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local client = vim.lsp.get_client_by_id(client_id)
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-- Ill-behaved servers may not honor the client capability and try to register
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-- anyway, so ignore requests when the user has opted out of the feature.
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local has_capability = vim.tbl_get(
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client.config.capabilities or {},
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'workspace',
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'didChangeWatchedFiles',
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'dynamicRegistration'
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)
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if not has_capability or not client.workspace_folders then
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return
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end
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local watch_regs = {}
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for _, w in ipairs(reg.registerOptions.watchers) do
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local relative_pattern = false
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local glob_patterns = {}
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if type(w.globPattern) == 'string' then
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for _, folder in ipairs(client.workspace_folders) do
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table.insert(glob_patterns, { baseUri = folder.uri, pattern = w.globPattern })
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end
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else
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relative_pattern = true
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table.insert(glob_patterns, w.globPattern)
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end
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for _, glob_pattern in ipairs(glob_patterns) do
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local base_dir = nil
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if type(glob_pattern.baseUri) == 'string' then
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base_dir = glob_pattern.baseUri
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elseif type(glob_pattern.baseUri) == 'table' then
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base_dir = glob_pattern.baseUri.uri
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end
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assert(base_dir, "couldn't identify root of watch")
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base_dir = vim.uri_to_fname(base_dir)
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local kind = w.kind
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or protocol.WatchKind.Create + protocol.WatchKind.Change + protocol.WatchKind.Delete
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local pattern = glob_pattern.pattern
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if relative_pattern then
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pattern = base_dir .. '/' .. pattern
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end
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pattern = parse(pattern)
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table.insert(watch_regs, {
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base_dir = base_dir,
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pattern = pattern,
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kind = kind,
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})
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end
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end
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local callback = function(base_dir)
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return function(fullpath, change_type)
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for _, w in ipairs(watch_regs) do
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change_type = to_lsp_change_type[change_type]
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-- e.g. match kind with Delete bit (0b0100) to Delete change_type (3)
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local kind_mask = bit.lshift(1, change_type - 1)
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local change_type_match = bit.band(w.kind, kind_mask) == kind_mask
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if base_dir == w.base_dir and M._match(w.pattern, fullpath) and change_type_match then
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local change = {
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uri = vim.uri_from_fname(fullpath),
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type = change_type,
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}
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local last_type = change_cache[client_id][change.uri]
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if last_type ~= change.type then
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change_queues[client_id] = change_queues[client_id] or {}
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table.insert(change_queues[client_id], change)
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change_cache[client_id][change.uri] = change.type
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end
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if not queue_timers[client_id] then
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queue_timers[client_id] = vim.defer_fn(function()
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client.notify('workspace/didChangeWatchedFiles', {
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changes = change_queues[client_id],
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})
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queue_timers[client_id] = nil
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change_queues[client_id] = nil
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change_cache[client_id] = nil
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end, queue_timeout_ms)
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end
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break -- if an event matches multiple watchers, only send one notification
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end
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end
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end
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end
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local watching = {}
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for _, w in ipairs(watch_regs) do
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if not watching[w.base_dir] then
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watching[w.base_dir] = true
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table.insert(
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cancels[client_id][reg.id],
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M._watchfunc(w.base_dir, { uvflags = { recursive = true } }, callback(w.base_dir))
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)
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end
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end
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end
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--- Unregisters the workspace/didChangeWatchedFiles capability dynamically.
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---
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---@param unreg table LSP Unregistration object.
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---@param ctx table Context from the |lsp-handler|.
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function M.unregister(unreg, ctx)
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local client_id = ctx.client_id
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local client_cancels = cancels[client_id]
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local reg_cancels = client_cancels[unreg.id]
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while #reg_cancels > 0 do
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table.remove(reg_cancels)()
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end
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client_cancels[unreg.id] = nil
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if not next(cancels[client_id]) then
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cancels[client_id] = nil
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end
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end
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return M
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