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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, TBOOX Open Source Group.
--
-- @author OpportunityLiu
-- @file render.lua
--
-- imports
import("lib.detect.find_file")
function _fill(opt, params)
return function(match)
local imp = match:match("^Import%((.+)%)$")
if imp then
local func = find_file(imp .. "(*)", opt.templatedir)
assert(func)
local args = path.filename(func):match("%((.+)%)$"):split(",", {plain = true})
return _render(func, opt, args)
end
return opt.paramsprovider(match, params) or "<Not Provided>"
end
end
function _cfill(opt, params)
return function(match)
local tmp = match:split(";", {strict = true, plain = true})
assert(#tmp == 2 or #tmp == 3)
local cond = tmp[1]
local value1 = tmp[2]
local value2 = ""
if #tmp == 3 then
value2 = tmp[3]
end
tmp = cond:split("=", {plain = true})
assert(#tmp == 2)
local k = tmp[1]:trim()
local v = tmp[2]:trim()
if opt.paramsprovider(k, params) == v then
return value1
end
return value2
end
end
function _expand(params)
local r = {""}
for _, v in ipairs(params) do
if type(v) == "string" then
for i, p in ipairs(r) do
r[i] = p .. "\0" .. v
end
else
local newr = {}
for _, c in ipairs(v) do
for _, p in ipairs(r) do
table.insert(newr, p .. "\0" .. c)
end
end
r = newr
end
end
for i, p in ipairs(r) do
r[i] = p:split("\0")
end
return r
end
function _render(templatepath, opt, args)
local template = io.readfile(templatepath)
local params = _expand(opt.paramsprovider(args))
local replaced = ""
for _, v in ipairs(params) do
local tmpl = template:gsub(opt.cpattern, _cfill(opt, v))
replaced = replaced .. tmpl:gsub(opt.pattern, _fill(opt, v))
end
return replaced
end
function main(templatepath, pattern, cpattern, paramsprovider)
local opt = {
pattern = pattern,
cpattern = cpattern,
paramsprovider = paramsprovider,
templatedir = path.directory(templatepath)
}
return _render(templatepath, opt, {})
end
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