diff options
Diffstat (limited to 'server-beta/src/glob/gitignore.lua')
| -rw-r--r-- | server-beta/src/glob/gitignore.lua | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/server-beta/src/glob/gitignore.lua b/server-beta/src/glob/gitignore.lua new file mode 100644 index 00000000..f98a2f31 --- /dev/null +++ b/server-beta/src/glob/gitignore.lua @@ -0,0 +1,221 @@ +local m = require 'lpeglabel' +local matcher = require 'glob.matcher' + +local function prop(name, pat) + return m.Cg(m.Cc(true), name) * pat +end + +local function object(type, pat) + return m.Ct( + m.Cg(m.Cc(type), 'type') * + m.Cg(pat, 'value') + ) +end + +local function expect(p, err) + return p + m.T(err) +end + +local parser = m.P { + 'Main', + ['Sp'] = m.S(' \t')^0, + ['Slash'] = m.S('/\\')^1, + ['Main'] = m.Ct(m.V'Sp' * m.P'{' * m.V'Pattern' * (',' * expect(m.V'Pattern', 'Miss exp after ","'))^0 * m.P'}') + + m.Ct(m.V'Pattern') + + m.T'Main Failed' + , + ['Pattern'] = m.Ct(m.V'Sp' * prop('neg', m.P'!') * expect(m.V'Unit', 'Miss exp after "!"')) + + m.Ct(m.V'Unit') + , + ['NeedRoot'] = prop('root', (m.P'.' * m.V'Slash' + m.V'Slash')), + ['Unit'] = m.V'Sp' * m.V'NeedRoot'^-1 * expect(m.V'Exp', 'Miss exp') * m.V'Sp', + ['Exp'] = m.V'Sp' * (m.V'FSymbol' + object('/', m.V'Slash') + m.V'Word')^0 * m.V'Sp', + ['Word'] = object('word', m.Ct((m.V'CSymbol' + m.V'Char' - m.V'FSymbol')^1)), + ['CSymbol'] = object('*', m.P'*') + + object('?', m.P'?') + + object('[]', m.V'Range') + , + ['Char'] = object('char', (1 - m.S',{}[]*?/\\')^1), + ['FSymbol'] = object('**', m.P'**'), + ['Range'] = m.P'[' * m.Ct(m.V'RangeUnit'^0) * m.P']'^-1, + ['RangeUnit'] = m.Ct(- m.P']' * m.C(m.P(1)) * (m.P'-' * - m.P']' * m.C(m.P(1)))^-1), +} + +local mt = {} +mt.__index = mt +mt.__name = 'gitignore' + +function mt:addPattern(pat) + if type(pat) ~= 'string' then + return + end + self.pattern[#self.pattern+1] = pat + if self.options.ignoreCase then + pat = pat:lower() + end + local states, err = parser:match(pat) + if not states then + self.errors[#self.errors+1] = { + pattern = pat, + message = err + } + return + end + for _, state in ipairs(states) do + self.matcher[#self.matcher+1] = matcher(state) + end +end + +function mt:setOption(op, val) + if val == nil then + val = true + end + self.options[op] = val +end + +---@param key string | "'type'" | "'list'" +---@param func function | "function (path) end" +function mt:setInterface(key, func) + if type(func) ~= 'function' then + return + end + self.interface[key] = func +end + +function mt:callInterface(name, ...) + local func = self.interface[name] + return func(...) +end + +function mt:hasInterface(name) + return self.interface[name] ~= nil +end + +function mt:checkDirectory(catch, path, matcher) + if not self:hasInterface 'type' then + return true + end + if not matcher:isNeedDirectory() then + return true + end + if #catch < #path then + -- if path is 'a/b/c' and catch is 'a/b' + -- then the catch must be a directory + return true + else + return self:callInterface('type', path) == 'directory' + end +end + +function mt:simpleMatch(path) + for i = #self.matcher, 1, -1 do + local matcher = self.matcher[i] + local catch = matcher(path) + if catch and self:checkDirectory(catch, path, matcher) then + if matcher:isNegative() then + return false + else + return true + end + end + end + return nil +end + +function mt:finishMatch(path) + local paths = {} + for filename in path:gmatch '[^/\\]+' do + paths[#paths+1] = filename + end + for i = 1, #paths do + local newPath = table.concat(paths, '/', 1, i) + local passed = self:simpleMatch(newPath) + if passed == true then + return true + elseif passed == false then + return false + end + end + return false +end + +function mt:scan(callback) + local files = {} + if type(callback) ~= 'function' then + callback = nil + end + local list = {} + local result = self:callInterface('list', '') + if type(result) ~= 'table' then + return files + end + for _, path in ipairs(result) do + list[#list+1] = path:match '([^/\\]+)[/\\]*$' + end + while #list > 0 do + local current = list[#list] + if not current then + break + end + list[#list] = nil + if not self:simpleMatch(current) then + local fileType = self:callInterface('type', current) + if fileType == 'file' then + if callback then + callback(current) + end + files[#files+1] = current + elseif fileType == 'directory' then + local result = self:callInterface('list', current) + if type(result) == 'table' then + for _, path in ipairs(result) do + local filename = path:match '([^/\\]+)[/\\]*$' + if filename then + list[#list+1] = current .. '/' .. filename + end + end + end + end + end + end + return files +end + +function mt:__call(path) + if self.options.ignoreCase then + path = path:lower() + end + return self:finishMatch(path) +end + +return function (pattern, options, interface) + local self = setmetatable({ + pattern = {}, + options = {}, + matcher = {}, + errors = {}, + interface = {}, + }, mt) + + if type(pattern) == 'table' then + for _, pat in ipairs(pattern) do + self:addPattern(pat) + end + else + self:addPattern(pattern) + end + + if type(options) == 'table' then + for op, val in pairs(options) do + self:setOption(op, val) + end + end + + if type(interface) == 'table' then + for key, func in pairs(interface) do + self:setInterface(key, func) + end + end + + return self +end |