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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),
}
---@class gitignore
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
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