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Added a sh module for better shell access
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,227 +1,4 @@ | ||
| package luasrc | ||
|
|
||
| const ( | ||
| Sh = `--[[ | ||
| The MIT License (MIT) | ||
| Copyright (c) 2015 Serge Zaitsev | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| ]] | ||
| local M = {} | ||
| local abort = true | ||
| local function copy(obj, seen) | ||
| if type(obj) ~= 'table' then return obj end | ||
| if seen and seen[obj] then return seen[obj] end | ||
| local s = seen or {} | ||
| local res = setmetatable({}, getmetatable(obj)) | ||
| s[obj] = res | ||
| for k, v in pairs(obj) do res[copy(k, s)] = copy(v, s) end | ||
| return res | ||
| end | ||
| -- converts key and it's argument to "-k" or "-k=v" or just "" | ||
| local function arg(k, a) | ||
| if not a then return k end | ||
| if type(a) == 'string' and #a > 0 then return k..'='..a end | ||
| if type(a) == 'number' then return k..'='..tostring(a) end | ||
| if type(a) == 'boolean' and a == true then return k end | ||
| if type(a) == 'function' then return "" end | ||
| error('invalid argument type', type(a), a) | ||
| end | ||
| -- converts nested tables into a flat list of arguments and concatenated input | ||
| local function flatten(t) | ||
| local result = {args = {}, input = ''} | ||
| local function f(t) | ||
| local keys = {} | ||
| for k, v in ipairs(t) do | ||
| keys[k] = true | ||
| if type(v) == 'table' then | ||
| f(v) | ||
| else | ||
| table.insert(result.args, v) | ||
| end | ||
| end | ||
| for k, v in pairs(t) do | ||
| if k == '__input' then | ||
| result.input = result.input .. v | ||
| elseif k == 'cmd' then | ||
| elseif k == 'stdout' then | ||
| elseif k == 'stderr' then | ||
| elseif k == 'exitcode' then | ||
| elseif not keys[k] and k:sub(1, 1) ~= '_' then | ||
| local key = '-'..k | ||
| if #k > 1 then key = '-' ..key end | ||
| table.insert(result.args, arg(key, v)) | ||
| end | ||
| end | ||
| end | ||
| f(t) | ||
| return result | ||
| end | ||
| -- returns a function that executes the command with given args and returns its | ||
| -- output, exit status etc | ||
| local function command(cmd, ...) | ||
| local prearg = {...} | ||
| return function(...) | ||
| local args = flatten({...}) | ||
| local s = cmd | ||
| for _, v in ipairs(prearg) do | ||
| s = s .. ' ' .. v | ||
| end | ||
| for k, v in pairs(args.args) do | ||
| s = s .. ' ' .. v | ||
| end | ||
| if args.input then | ||
| local f = io.open(M.tmpfile, 'w') | ||
| f:write(args.input) | ||
| f:close() | ||
| s = s .. ' <'..M.tmpfile | ||
| end | ||
| print("cmd", s) | ||
| local exit, output, stderr = blade.system(s) | ||
| os.remove(M.tmpfile) | ||
| local t = { | ||
| __input = output, | ||
| cmd = cmd, | ||
| stdout = output, | ||
| stderr = stderr, | ||
| exitcode = exit, | ||
| print = function(self) | ||
| io.write(self.__input) | ||
| return self | ||
| end, | ||
| lines = function(self) | ||
| s = tostring(self.__input) | ||
| if s:sub(-1)~="\n" then s=s.."\n" end | ||
| return s:gmatch("(.-)\n") | ||
| end, | ||
| } | ||
| local mt = { | ||
| __index = function(self, k, ...) | ||
| if self.exitcode ~= 0 then | ||
| if abort then | ||
| os.exit(self.exitcode) | ||
| end | ||
| return function() | ||
| return self | ||
| end | ||
| end | ||
| return command(k) | ||
| end, | ||
| __tostring = function(self) | ||
| -- return trimmed command output as a string | ||
| return self.__input:match('^%s*(.-)%s*$') | ||
| end | ||
| } | ||
| return setmetatable(t, mt) | ||
| end | ||
| end | ||
| -- creates sub commands | ||
| local function subcommand(...) | ||
| local prearg = {...} | ||
| return setmetatable({}, { | ||
| __call = function(_, cmd, ...) | ||
| local foo = copy(prearg) | ||
| table.insert(foo, cmd) | ||
| return command(unpack(foo))(...) | ||
| end, | ||
| __index = function(t, cmd) | ||
| local foo = copy(prearg) | ||
| table.insert(foo, cmd) | ||
| return command(unpack(foo)) | ||
| end | ||
| }) | ||
| end | ||
| -- get global metatable | ||
| local mt = getmetatable(_G) | ||
| if mt == nil then | ||
| mt = {} | ||
| setmetatable(_G, mt) | ||
| end | ||
| -- export command() function and configurable temporary "input" file | ||
| M.command = command | ||
| M.abort = function(abrt) | ||
| abort = abrt | ||
| end | ||
| M.subcommand = subcommand | ||
| M.tmpfile = '/tmp/shluainput' | ||
| M.git = subcommand('git') | ||
| M.sudo = subcommand('sudo') | ||
| -- allow to call sh to run shell commands | ||
| setmetatable(M, { | ||
| __call = function(_, cmd, ...) | ||
| return command(cmd)(...) | ||
| end, | ||
| __index = function(t, cmd) | ||
| return command(cmd) | ||
| end | ||
| }) | ||
| return M | ||
| ` | ||
| Shell = `local sh = require('sh') | ||
| local M = {} | ||
| -- get global metatable | ||
| local mt = getmetatable(_G) | ||
| if mt == nil then | ||
| mt = {} | ||
| setmetatable(_G, mt) | ||
| end | ||
| -- set hook for undefined variables | ||
| mt.__index = function(t, cmd) | ||
| return sh.command(cmd) | ||
| end | ||
| git = sh.git | ||
| sudo = sh.sudo | ||
| -- export command() function and configurable temporary "input" file | ||
| M.command = sh.command | ||
| M.subcommand = sh.subcommand | ||
| M.tmpfile = '/tmp/shluainput' | ||
| -- allow to call sh to run shell commands | ||
| setmetatable(M, { | ||
| __call = function(_, cmd, ...) | ||
| return sh.command(cmd, ...) | ||
| end, | ||
| __index = function(t, cmd) | ||
| return sh.command(cmd) | ||
| end | ||
| }) | ||
| return M | ||
| ` | ||
| ) |
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