Commit graph

621 commits

Author SHA1 Message Date
Victor Vasiliev 606aaf30ac Fix Windows support:
* Improve OS detection
* Provide workaround for a proc_open bug.

Change-Id: I02b56cf2af1613406f7175a4ca053adb9d794bdd
2012-04-24 04:47:53 +04:00
Tim Starling da06273ede Nicer errors with backtraces etc.
* Added error backtrace collection to MWServer:handleCall()
* When there is an error on parse, show a short and simple inline error
  message to the user, which when clicked, expands to a full error with
  HTML-formatted backtrace.
* When an error is encountered during module validation, have the code
  editor jump directly to the line. Requires r115011.
* Expose the code location of most errors to Scribunto, by parsing the
  standard error message format.
* During module validation, abbreviate the error location if the error
  is in the same module.
* Do not execute the module during validation, just parse it. Execution
  does not really work without an active parse operation in progress.
  It already caused a fatal error if you called require() from the main
  chunk, and problems would have become more visible as more
  parser-related APIs were added.
* LuaSandbox does not yet provide backtraces, but this is planned.

Change-Id: Id9f6564a41b310792b3fe3ebb527cbf8f8771bd1
2012-04-23 21:58:30 +10:00
tstarling b68cae904a More tests and some related bug fixes
* Added tests for the engine classes.
* Added some tests that run under Lua.
* In the chunk names, fixed truncation of module names at 60 bytes
  by using an "=" prefix instead of @.
* Fixed a bug in mw.clone() which was causing the metatable to be set on
  the source table instead of the destination.
* Put restricted setfenv/getfenv in the cloned environment rather than
  the base environment, they work better that way.
* In setfenv(), check for getfenv() == nil, since that's what our own
  restricted getfenv returns.
* Fixed getfenv() handling of numeric arguments: add one where
  appropriate.

Change-Id: I2b356fd65a3fcb348c4e99a3a4267408fb995739
2012-04-19 17:48:20 +10:00
tstarling cebe775ee8 Added more Lua environment features
Package library:

* Added a simulation of the Lua 5.1 package library.
* Removed mw.import(), replaced it with a package loader. Packages can be
  retrieved from the wiki, using require('Module:Foo'), or from files
  distributed with Scribunto, using require('foo'). The "Module:" prefix allows
  for source compatibility with existing Lua code.
* Added a couple of libraries from LuaForge: luabit and stringtools.
* Made fetchModuleFromParser() return null on error instead of throwing an
  exception, to more easily support the desired behaviour of the package loader,
  which needs to return null on error.
* Renamed mw.setupEnvironment() to mw.setup() since it is setting up things
  other than the environment now.
* In MWServer:handleRegisterLibrary(), remove the feature which interprets dots
  in library names, since LuaSandbox doesn't support this.

Improved module isolation and related refactoring:

* Expose restricted versions of getfenv() and setfenv() to user Lua code.
  Requires luasandbox r114952.
* Don't cache the export list returned by module execution for later function
  calls. This breaks isolation of #invoke calls, since the local variables are
  persistent.
* Removed ScribuntoFunctionBase and its children, since it doesn't really have
  a purpose if it can't cache anything. Instead, invoke functions using a module
  method called invoke().
* Removed Module::initialize(), replaced it with a validate() function. This is
  a more elegant interface and works better with the new module caching scheme.
* Use a Status object for the return value of Engine::validate() instead of an
  array. Use the formatting facilities of the Status class.

Other:

* Removed "too many returns" error, doesn't fit in with Lua conventions.
* Use the standalone engine by default, so that the extension will work without
  configuration for more people.
* Added an accessor for $engine->interpreter
* Fix mw.clone() to correctly clone metatables
* If the standalone interpreter exits due to an error, there are some contexts
  where the initial error will be caught and ignored, and the user will see the
  error from checkValid() instead. In this case, rethrow the original error for
  a more informative message.
* Load mw.lua into the initial standalone environment, to reduce code
  duplication between mw.lua and MWServer.lua.
* Fixed a bug in Scribunto_LuaStandaloneInterpreter::handleCall() for functions
  that return no results.
* Fixed a bug in encodeLuaVar() for strings with "\r". Added test case.
* In MWServer.lua, don't call error() for internal errors, instead just print
  the error and exit. This avoids a protocol violation when an error is
  encountered from within handleCall().
* Added lots of documentation. Lua doc comments are in LuaDoc format.

Change-Id: Ie2fd572c362bedf02f45d3fa5352a5280e034740
2012-04-18 13:46:18 +10:00
tstarling 889f4e42a5 Allow PHP functions to return multiple values to Lua
Corresponding luasandbox commit is r114920.

Change-Id: I10fe726795623e2976c9ddadaa4d9b6d44b30bed
2012-04-16 15:43:34 +10:00
tstarling 16d132312f Remove old check for luasandbox extension
Change-Id: I08594015ce044d7fab129b8bbbef2a92382f6870
2012-04-16 15:06:06 +10:00
tstarling b0f00103e2 Added tests and fixed bugs
* Added unit tests for the two Lua interpreter classes
* Fixed a bug in checkType()
* Have Scribunto_LuaSandboxInterpreter throw an exception on construct
  when the extension doesn't exist, to match the standalone behaviour.
* In Scribunto_LuaSandboxInterpreter, removed debugging statements
  accidentally left in.
* Convert LuaSandboxTimeoutError to the appropriate common error
  message.
* Moved the option munging from the sandbox engine to the interpreter,
  so that the interpreter can be unit tested separately.
* Use /bin/sh instead of bash for lua_ulimit.sh, since dash is smaller
  and still supports ulimit.
* Use exec to run the lua binary, so that the vsize of the shell doesn't
  add to the memory limit.
* Added a quit function to the standalone interpreter. Unused at present.
* Don't add a comma after the last element of a table in a Lua
  expression.
* Make the SIGXCPU detection work: proc_open() runs the command via a
  shell, which reports signals in the child via the exit status, so
  proc_get_status() will never return a valid termsig element.
* In MWServer:call(), fixed a bug causing the return values to be
  wrapped in an array.
* Fixed a misunderstanding of what select() does.
* In MWServer:getStatus(), fixed indexes so that vsize will be correct.
  Removed RSS, since it wasn't used anyway and turns out to be measured
  in multiples of the page size, and I couldn't be bothered trying to
  fetch that from getconf. Return the PID and vsize as numbers rather
  than strings.
* Added a simple table dump feature to MWServer:debug().
* Fixed brackets in MWServer:tostring().
* Added missing Linux 32-bit binary.

Change-Id: Ibf5f4656b1c0a9f81287d363184c3fe9d2abdafd
2012-04-16 14:41:08 +10:00
tstarling 54cedd69b8 Introduced standalone interpreter, implemented module isolation
* Introduced a Lua implementation based on shelling out to a standard Lua binary.
* Bundled several Lua binaries for common platforms. I haven't added a 32-bit Linux binary yet, but that will come.
* Refactored the existing Lua class, bringing out functionality common to all Lua implementations into a set of common base classes.
* Moved the bulk of the implementation-specific functionality into a set of "interpreter" classes.
* Renamed LuaSandboxEngine to Scribunto_LuaSandboxEngine
* Don't create an engine object unconditionally when the ParserLimitReport hook is called.
* Implemented isolation of module global variable namespaces. This means that separate {{#invoke}} calls can't pass data to each other -- this was a desired feature in planning since it allows more flexibility in wikitext parser design. Isolation for mw.import() means that modules cannot accidentally create global variables which affect other modules -- exports are solely via the return value.

Change-Id: I3fa35651fe5b1fbfd85adeadc220b1ea31cd6f0b
2012-04-13 20:45:26 +10:00
Demon 6ff6b7c1ac Adding .gitreview
Change-Id: I1722237f2822855bf4f51c51d1265b58d442d312
2012-04-06 13:46:17 -04:00
Tim Starling a1e4c450cb File moves for extension rename, and removed unused directory 2012-04-06 05:06:27 +00:00
Tim Starling 30622e86fe More changes for extension rename 2012-04-06 05:04:30 +00:00
Tim Starling 925045a669 * Removed scriptlinks table. It just seemed the same as templatelinks to me, and tl_namespace can be used if you want to separate out modules.
* Used Parser::fetchTemplateAndTitle() to get modules and register them in templatelinks. Most of the logic was previously duplicated.
* Changed the configuration and factory functions to allow for the possibility of multiple engines coexisting on the one wiki.
* Made the $parser parameter optional, to improve debugging in the case where a parser is needed but parsing has not started. Removed all $wgParser references.
* Renamed Scripting::getEngine() to getParserEngine() and resetEngine() to resetParserEngine()
* Removed setOptions() and updateOptions(). If you want to change the options, you can always make a new instance.
* Renamed getModule() to fetchModuleFromParser()
* Simplified module constructor parameters and member variable list
* Fixed spelling error langauge -> language
* Renamed a few variables for clarity: $module -> $moduleName, $function -> $functionName
* Renamed getLimitsReport() to getLimitReport() as it is in Parser
* Use an accessor for getting LuaSandboxEngineModule::$contents
* Renamed configuration variable maxCPU to cpuLimit
* Include the full message name as a parameter to ScriptingException. This makes it easier to find messages in the i18n file, and it makes it easier to find invocation points when a translator wants to know how a message is used. Adding the message name as a comment on the same line seems like a waste of space when you can just make it an actual parameter.
* Reduce the number of formal parameters to ScriptingException::__construct(), since there is already too many and we may want to add more things later, such as backtraces with hyperlinks and other such stuff.
* Include the code location as $2 unconditionally so that there is less chance of getting the parameters wrong
* Shortened some message names. Wrote English text for messages without it.
2012-04-05 07:58:02 +00:00
Tim Starling 64474eb0fa * Remove old-fashioned "m" prefix from member variables
* Make ScriptingEngineBase::getDefaultOptions() non-abstract since there is a reasonable default behaviour which can be implemented
2012-04-05 03:53:05 +00:00
Tim Starling 63e989ad8b Rename i18n files per documented conventions 2012-04-04 06:19:58 +00:00
Tim Starling c8f4d0a213 First-pass cleanup:
* Removed ScriptingEngineBase::load(), inappropriate interface specification, only used by child classes and more properly defined by them
* Fixed inappropriate use of final
* Fixed case of a class constant to conform with MediaWiki conventions
* Use a factory function interface for module creation instead of a class name accessor
* Don't pass unnecessary $engine parameter to ScriptingFunctionBase::__construct(). Pass parent object as the first parameter per convention.
* Fixed unnecessary reference parameter in doRunHook()
* Have LuaSandboxEngineFunction::call() return the first result or null, per the base class documentation, instead of imploding. 
* Use strval() to avoid a warning in case call() returns an array or object
* Improved some comments
2012-04-04 06:10:32 +00:00
Tim Starling be72db112a * Added missing message scripting-exception-common-toofewargs
* In importModule(), don't catch exceptions since that luasandbox bug is fixed now
* Use the chunkName parameter to loadString to get more informative error messages
2012-04-04 05:10:47 +00:00
vvv 03bf6ce779 Add integration with CodeEditor extension. 2012-02-06 22:14:47 +00:00
vvv eb6f95b6ce Drop an empty file. 2012-02-06 21:49:39 +00:00
vvv 78fc58f457 Define namespace constants after whole configuration was loaded. This allows $wgScriptingNamespaceNumbers to be defined just like any other configuration variable. 2012-01-29 19:50:34 +00:00
Sam Reed fa2dd80ead Use get accessors
Add/Improve documentation

Remove trailing whitespace
2012-01-28 16:46:15 +00:00
vvv b960075a55 Commiting the initial revision of the Scripting extension, a framework that allows programming languages to be embedded regardless of what are those languages actually are and how they are interpreted.
This is a very raw version, and it misses most messages (even in English!) and probably needs some more work.
2012-01-28 16:22:18 +00:00