no longer beta

1 files changed, 151 insertions, 0 deletions

diff --git a/script/glob/matcher.lua b/script/glob/matcher.lua
new file mode 100644
index 00000000..f4c2b12c
--- /dev/null
+++ b/script/glob/matcher.lua
@@ -0,0 +1,151 @@
+local m = require 'lpeglabel'
+
+local Slash  = m.S('/\\')^1
+local Symbol = m.S',{}[]*?/\\'
+local Char   = 1 - Symbol
+local Path   = Char^1 * Slash
+local NoWord = #(m.P(-1) + Symbol)
+local function whatHappened()
+    return m.Cmt(m.P(1)^1, function (...)
+        print(...)
+    end)
+end
+
+local mt = {}
+mt.__index = mt
+mt.__name = 'matcher'
+
+function mt:exp(state, index)
+    local exp = state[index]
+    if not exp then
+        return
+    end
+    if exp.type == 'word' then
+        return self:word(exp, state, index + 1)
+    elseif exp.type == 'char' then
+        return self:char(exp, state, index + 1)
+    elseif exp.type == '**' then
+        return self:anyPath(exp, state, index + 1)
+    elseif exp.type == '*' then
+        return self:anyChar(exp, state, index + 1)
+    elseif exp.type == '?' then
+        return self:oneChar(exp, state, index + 1)
+    elseif exp.type == '[]' then
+        return self:range(exp, state, index + 1)
+    elseif exp.type == '/' then
+        return self:slash(exp, state, index + 1)
+    end
+end
+
+function mt:word(exp, state, index)
+    local current = self:exp(exp.value, 1)
+    local after = self:exp(state, index)
+    if after then
+        return current * Slash * after
+    else
+        return current
+    end
+end
+
+function mt:char(exp, state, index)
+    local current = m.P(exp.value)
+    local after = self:exp(state, index)
+    if after then
+        return current * after * NoWord
+    else
+        return current * NoWord
+    end
+end
+
+function mt:anyPath(_, state, index)
+    local after = self:exp(state, index)
+    if after then
+        return m.P {
+            'Main',
+            Main    = after
+                    + Path * m.V'Main'
+        }
+    else
+        return Path^0
+    end
+end
+
+function mt:anyChar(_, state, index)
+    local after = self:exp(state, index)
+    if after then
+        return m.P {
+            'Main',
+            Main    = after
+                    + Char * m.V'Main'
+        }
+    else
+        return Char^0
+    end
+end
+
+function mt:oneChar(_, state, index)
+    local after = self:exp(state, index)
+    if after then
+        return Char * after
+    else
+        return Char
+    end
+end
+
+function mt:range(exp, state, index)
+    local after = self:exp(state, index)
+    local ranges = {}
+    local selects = {}
+    for _, range in ipairs(exp.value) do
+        if #range == 1 then
+            selects[#selects+1] = range[1]
+        elseif #range == 2 then
+            ranges[#ranges+1] = range[1] .. range[2]
+        end
+    end
+    local current = m.S(table.concat(selects)) + m.R(table.unpack(ranges))
+    if after then
+        return current * after
+    else
+        return current
+    end
+end
+
+function mt:slash(_, state, index)
+    local after = self:exp(state, index)
+    if after then
+        return after
+    else
+        self.needDirectory = true
+        return nil
+    end
+end
+
+function mt:pattern(state)
+    if state.root then
+        return m.C(self:exp(state, 1))
+    else
+        return m.C(self:anyPath(nil, state, 1))
+    end
+end
+
+function mt:isNeedDirectory()
+    return self.needDirectory == true
+end
+
+function mt:isNegative()
+    return self.state.neg == true
+end
+
+function mt:__call(path)
+    return self.matcher:match(path)
+end
+
+return function (state, options)
+    local self = setmetatable({
+        options = options,
+        state   = state,
+    }, mt)
+    self.matcher = self:pattern(state)
+    return self
+end