/usr/share/freepops/lua/updater_common.lua is in freepops 0.2.9-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- This is part of FreePOPs (http://www.freepops.org) released under GNU/GPL
--============================================================================--
MODULE_VERSION = "0.2.4"
MODULE_NAME = "updater_common"
MODULE_REQUIRE_VERSION = "0.2.3"
MODULE_LICENSE = "GNU/GPL"
MODULE_URL = "http://www.freepops.org/download.php?module=updater_common.lua"
MODULE_HOMEPAGE = "http://www.freepops.org/"
local browser = require("browser")
local plugins2xml = require("plugins2xml")
local version_comparer = require("version_comparer")
local io, os, table, string = io, os, table, string
local freepops, log = freepops, log
local ipairs = ipairs
local print = print
local tostring = tostring
local assert = assert
local gettext = require("lgettext")
local _ = gettext.translate
module("updater_common")
-- {{{ helpers
---
-- Gives an iterator over the lines of a given string.
-- @param s string the data to split in lines.
-- @return function.
function lines(s) return string.gmatch(s,"[^\n][^\n]*") end
---
-- Gives the path of the module.
-- Notice that this is not the path where the module is, but where it should
-- be placed (i.e. /var under unix, LUA_UPDATES/ under win.
-- @param name string the name of the module.
-- @return string The path.
function update_path_for(name)
local s,_,namespace = freepops.find(name)
if s == nil then
log.error_print("Unable to find "..name)
log.error_print("Assuming it was a toplevel module")
s = name..".lua"
namespace=""
end
local name = string.match(s,"([^/]*%.lua)$")
if namespace ~= "" then namespce = "/" .. namespace end
return freepops.MODULES_PREFIX[1]..namespace.."/"..name
end
---
-- Gives the can/should/why triple.
-- @param module string the name of the module.
-- @param reqversion string the version of the core required .
-- @param newversion string the new version of the module.
-- @param oldvers string the old version of the modue.
-- @return bool bool string The can,should,why triple.
function check_if_updatable(module, reqversion, newversion, oldvers)
log.dbg("Checking versions for module: " .. module .. ", "..
"New: " .. newversion .. ", Old: " .. oldvers)
local rc = version_comparer.compare_versions(newversion, oldvers)
-- The check failed! We'll just warn an attempt an upgrade
--
if (rc == nil) then
log.dbg("Warning: Unable to compare the versions")
rc = 1
end
log.dbg("compare_versions("..newversion..","..oldvers..") = "..rc)
-- A new version is available, check the require version
--
if (rc == 1) then
local isFPOk = freepops.enough_new(reqversion)
if not isFPOk then
log.dbg("Warning: Unable to update the module as it requires " ..
"a newer version of FreePOPS (" .. reqversion .. ")")
return false, true, (_("FreePOPs is too old, needs version "))..reqversion
end
-- The version is the same.
--
elseif (rc <= 0) then
return true, false, (_("Already at the newest version"))
end
return true, true, (_("New version available"))
end
---
-- Installs the module.
-- @param module string The name of the module.
-- @param newlua string The boty of the module.
-- @param path string Where to put it.
-- @return bool true if ok, false plus an err message oherwise.
function replace_module(module, newlua, path)
-- Remove any old backups, and then backup the current file.
--
if path ~= nil then
local backupName = path .. ".bak"
os.remove(backupName)
local fptr, err = io.open(path, "r")
if (fptr ~= nil) then
fptr:close()
local status, err = os.rename(path, backupName)
if (status == nil or err ~= nil) then
log.error_print("Unable to backup the module: " .. module ..
". The module will not be updated, Error: " .. (err or "none"))
return false, ("Unable to backup the module: "..err)
end
end
end
-- Write the new module out.
--
local fptr, err = io.open(path, "w")
if (fptr == nil or err ~= nil) then
log.error_print("Unable to update the module: " .. module ..
". The module will not be updated, Error: " .. (err or "none"))
return false, ("Unable to update the module: "..err)
end
fptr:write(newlua)
fptr:close()
log.dbg("Plugin: " .. module .. " was successfully updated.")
return true
end
---
-- Gives the local version of a moule.
-- @param module string The module name.
-- @return string The version if available, 0.0.0 if not; and
-- the path of the file or nil if not present.
function get_local_version(module)
local file = freepops.find(module)
-- The module isn't installed
--
if file == nil then
return "0.0.0", nil
else
local txml = plugins2xml.extract(file)
local version = txml.version._content
return version, file
end
end
-- }}}
-- {{{ documentation/usage and manglers
local operations = {
"fetch_modules_metadata",
"fetch_module",
}
local fetch_modules_metadata_doc = [[
parameters:
(official|contrib) : The type of modules / default official
browser object: Lua browser object / default create a new one
answer:
A list of records separated by a blank line. Records have this shape:
"module_name: string"
"version: string"
"require_version: string"
"url: string"
"local_path: string"
"local_path_old: string"
"local_version: string"
"can_update: (true|false)"
"why_cannot_update: string"
"should_update: (true|false)"
local_path is not the path where the module is but where the update should be
placed. In the local_version line the version may be absent if the module is
not present. local_path_old is the path of the file whose version is
local_version]]
local fetch_module_doc = [[
parameters:
string : The name of the module
(true|false) : Install the module / default print it
(official|contrib) : The type of module / default official
browser object: Lua browser object / default create a new one
answer:
If an error occurred: "error: string"
If the second parameter was true then nothing.
If the second parameter was false then the body of the module.]]
local instructions = {
["fetch_modules_metadata"] = fetch_modules_metadata_doc,
["fetch_module"] = fetch_module_doc,
}
---
-- prints to stderr
function print_err(s) io.stderr:write(s..'\n') end
---
-- Prints to stderr the comand line syntax of updater.
function common_usage(cmd, stuff, errors)
cmd = cmd or "freepopsd -e updater.lua"
local err = print_err
err("")
err("Arguments specified and accepted: "..(stuff or ""))
err("Arguments specified and rejected: "..(errors or ""))
err("")
err("Usage: "..cmd.." backend operation args...")
err("")
err("Backends:")
err("\tphp")
err("")
err("Standard operations:")
for _,op in ipairs(operations) do
err("")
err("Operation: "..op)
err(instructions[op] or "Not documented")
end
end
---
-- The table of function to print on stdout the result of the functions.
mangler = {
["fetch_modules_metadata"] = function(l, err)
if l == nil then
print("error: " .. err)
return 1
end
for _,t in ipairs(l) do
print("module_name: ".. t.module_name)
print("version: ".. t.version)
print("require_version: ".. t.require_version)
print("url: ".. t.url)
print("local_path: ".. t.local_path)
print("local_path_old: ".. t.local_path_old)
print("local_version: ".. t.local_version)
print("why_cannot_update: ".. t.why_cannot_update)
print("can_update: ".. tostring(t.can_update))
print("should_update: ".. tostring(t.should_update))
print("")
end
return 0
end,
["fetch_module"] = function(s,err)
if s == nil then
print("error: "..err)
return 1
end
print(s)
return 0
end,
}
-- }}}
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