FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
]]--
+--[[
+ Changes made by LuCI project:
+ * Renamed to luci.ltn12 to avoid collisions with luasocket
+ * Added inline documentation
+]]--
-----------------------------------------------------------------------------
-- LTN12 - Filters, sources, sinks and pumps.
-- LuaSocket toolkit.
local string = require("string")
local table = require("table")
local base = _G
+
+--- Diego Nehab's LTN12 - Filters, sources, sinks and pumps.
+-- See http://lua-users.org/wiki/FiltersSourcesAndSinks for design concepts
module("luci.ltn12")
filter = {}
-----------------------------------------------------------------------------
-- Filter stuff
-----------------------------------------------------------------------------
--- returns a high level filter that cycles a low-level filter
+
+--- LTN12 Filter constructors
+-- @class module
+-- @name luci.ltn12.filter
+
+--- Return a high level filter that cycles a low-level filter
+-- by passing it each chunk and updating a context between calls.
+-- @param low Low-level filter
+-- @param ctx Context
+-- @param extra Extra argument passed to the low-level filter
+-- @return LTN12 filter
function filter.cycle(low, ctx, extra)
base.assert(low)
return function(chunk)
end
end
--- chains a bunch of filters together
+--- Chain a bunch of filters together.
-- (thanks to Wim Couwenberg)
+-- @param ... filters to be chained
+-- @return LTN12 filter
function filter.chain(...)
local n = table.getn(arg)
local top, index = 1, 1
-----------------------------------------------------------------------------
-- Source stuff
-----------------------------------------------------------------------------
+
+--- LTN12 Source constructors
+-- @class module
+-- @name luci.ltn12.source
+
-- create an empty source
local function empty()
return nil
end
+--- Create an empty source.
+-- @return LTN12 source
function source.empty()
return empty
end
--- returns a source that just outputs an error
+--- Return a source that just outputs an error.
+-- @param err Error object
+-- @return LTN12 source
function source.error(err)
return function()
return nil, err
end
end
--- creates a file source
+--- Create a file source.
+-- @param handle File handle ready for reading
+-- @param io_err IO error object
+-- @return LTN12 source
function source.file(handle, io_err)
if handle then
return function()
else return source.error(io_err or "unable to open file") end
end
--- turns a fancy source into a simple source
+--- Turn a fancy source into a simple source.
+-- @param src fancy source
+-- @return LTN12 source
function source.simplify(src)
base.assert(src)
return function()
end
end
--- creates string source
+--- Create a string source.
+-- @param s Data
+-- @return LTN12 source
function source.string(s)
if s then
local i = 1
else return source.empty() end
end
--- creates rewindable source
+--- Creates rewindable source.
+-- @param src LTN12 source to be made rewindable
+-- @return LTN12 source
function source.rewind(src)
base.assert(src)
local t = {}
end
end
+--- Chain a source and a filter together.
+-- @param src LTN12 source
+-- @param f LTN12 filter
+-- @return LTN12 source
function source.chain(src, f)
base.assert(src and f)
local last_in, last_out = "", ""
end
end
--- creates a source that produces contents of several sources, one after the
--- other, as if they were concatenated
+--- Create a source that produces contents of several sources.
+-- Sources will be used one after the other, as if they were concatenated
-- (thanks to Wim Couwenberg)
+-- @param ... LTN12 sources
+-- @return LTN12 source
function source.cat(...)
local src = table.remove(arg, 1)
return function()
-----------------------------------------------------------------------------
-- Sink stuff
-----------------------------------------------------------------------------
--- creates a sink that stores into a table
+
+--- LTN12 sink constructors
+-- @class module
+-- @name luci.ltn12.sink
+
+--- Create a sink that stores into a table.
+-- @param t output table to store into
+-- @return LTN12 sink
function sink.table(t)
t = t or {}
local f = function(chunk, err)
return f, t
end
--- turns a fancy sink into a simple sink
+--- Turn a fancy sink into a simple sink.
+-- @param snk fancy sink
+-- @return LTN12 sink
function sink.simplify(snk)
base.assert(snk)
return function(chunk, err)
end
end
--- creates a file sink
+--- Create a file sink.
+-- @param handle file handle to write to
+-- @param io_err IO error
+-- @return LTN12 sink
function sink.file(handle, io_err)
if handle then
return function(chunk, err)
return 1
end
+--- Create a sink that discards data.
+-- @return LTN12 sink
function sink.null()
return null
end
--- creates a sink that just returns an error
+--- Create a sink that just returns an error.
+-- @param err Error object
+-- @return LTN12 sink
function sink.error(err)
return function()
return nil, err
end
end
--- chains a sink with a filter
+--- Chain a sink with a filter.
+-- @param f LTN12 filter
+-- @param snk LTN12 sink
+-- @return LTN12 sink
function sink.chain(f, snk)
base.assert(f and snk)
return function(chunk, err)
-----------------------------------------------------------------------------
-- Pump stuff
-----------------------------------------------------------------------------
--- pumps one chunk from the source to the sink
+
+--- LTN12 pump functions
+-- @class module
+-- @name luci.ltn12.pump
+
+--- Pump one chunk from the source to the sink.
+-- @param src LTN12 source
+-- @param snk LTN12 sink
+-- @return Chunk of data or nil if an error occured
+-- @return Error object
function pump.step(src, snk)
local chunk, src_err = src()
local ret, snk_err = snk(chunk, src_err)
else return nil, src_err or snk_err end
end
--- pumps all data from a source to a sink, using a step function
+--- Pump all data from a source to a sink, using a step function.
+-- @param src LTN12 source
+-- @param snk LTN12 sink
+-- @param step step function (optional)
+-- @return 1 if the operation succeeded otherwise nil
+-- @return Error object
function pump.all(src, snk, step)
base.assert(src and snk)
step = step or pump.step
--[[
-LuCI - IPKG wrapper library
+LuCI - Lua Configuration Interface
-Description:
-Wrapper for the ipkg Package manager
-
-Any return value of false or nil can be interpreted as an error
-
-FileId:
-$Id$
-
-License:
-Copyright 2008 Steven Barth <steven@midlink.org>
+(c) 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
+(c) 2008 Steven Barth <steven@midlink.org>
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
+You may obtain a copy of the License at
-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.
+http://www.apache.org/licenses/LICENSE-2.0
+$Id$
]]--
-module("luci.model.ipkg", package.seeall)
-require("luci.util")
-require("luci.fs")
-
-ipkg = luci.fs.access("/bin/opkg") and "opkg" or "ipkg"
-
--- Returns repository information
-function info(pkg)
- return _lookup("info", pkg)
-end
-
--- Returns a table with status information
-function status(pkg)
- return _lookup("status", pkg)
-end
-
--- Installs packages
-function install(...)
- return _action("install", ...)
-end
--- Returns whether a package is installed
-function installed(pkg, ...)
- local p = status(...)[pkg]
- return (p and p.Status and p.Status.installed)
-end
+local os = require "os"
+local util = require "luci.util"
--- Removes packages
-function remove(...)
- return _action("remove", ...)
-end
+local type = type
+local pairs = pairs
+local error = error
--- Updates package lists
-function update()
- return _action("update")
-end
+local ipkg = "opkg"
--- Upgrades installed packages
-function upgrade()
- return _action("upgrade")
-end
+--- LuCI IPKG/OPKG call abstraction library
+module "luci.model.ipkg"
-- Internal action function
-function _action(cmd, ...)
+local function _action(cmd, ...)
local pkg = ""
arg.n = nil
for k, v in pairs(arg) do
return (r == 0), r
end
--- Internal lookup function
-function _lookup(act, pkg)
- local cmd = ipkg .. " " .. act
- if pkg then
- cmd = cmd .. " '" .. pkg:gsub("'", "") .. "'"
- end
-
- return _parselist(luci.util.exec(cmd .. " 2>/dev/null"))
-end
-
-- Internal parser function
-function _parselist(rawdata)
+local function _parselist(rawdata)
if type(rawdata) ~= "string" then
error("IPKG: Invalid rawdata given")
end
- rawdata = luci.util.split(rawdata)
+ rawdata = util.split(rawdata)
local data = {}
local c = {}
local l = nil
for k, line in pairs(rawdata) do
if line:sub(1, 1) ~= " " then
- local split = luci.util.split(line, ":", 1)
+ local split = util.split(line, ":", 1)
local key = nil
local val = nil
if split[1] then
- key = luci.util.trim(split[1])
+ key = util.trim(split[1])
end
if split[2] then
- val = luci.util.trim(split[2])
+ val = util.trim(split[2])
end
if key and val then
end
return data
-end
\ No newline at end of file
+end
+
+-- Internal lookup function
+local function _lookup(act, pkg)
+ local cmd = ipkg .. " " .. act
+ if pkg then
+ cmd = cmd .. " '" .. pkg:gsub("'", "") .. "'"
+ end
+
+ return _parselist(util.exec(cmd .. " 2>/dev/null"))
+end
+
+
+--- Return information about installed and available packages.
+-- @param pkg Limit output to a (set of) packages
+-- @return Table containing package information
+function info(pkg)
+ return _lookup("info", pkg)
+end
+
+--- Return the package status of one or more packages.
+-- @param pkg Limit output to a (set of) packages
+-- @return Table containing package status information
+function status(pkg)
+ return _lookup("status", pkg)
+end
+
+--- Install one or more packages.
+-- @param ... List of packages to install
+-- @return Boolean indicating the status of the action
+-- @return IPKG return code
+function install(...)
+ return _action("install", ...)
+end
+
+--- Determine whether a given package is installed.
+-- @param pkg Package
+-- @return Boolean
+function installed(pkg)
+ local p = status(pkg)[pkg]
+ return (p and p.Status and p.Status.installed)
+end
+
+--- Remove one or more packages.
+-- @param ... List of packages to install
+-- @return Boolean indicating the status of the action
+-- @return IPKG return code
+function remove(...)
+ return _action("remove", ...)
+end
+
+--- Update package lists.
+-- @return Boolean indicating the status of the action
+-- @return IPKG return code
+function update()
+ return _action("update")
+end
+
+--- Upgrades all installed packages.
+-- @return Boolean indicating the status of the action
+-- @return IPKG return code
+function upgrade()
+ return _action("upgrade")
+end
+
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