luci/contrib/package/ucode-mod-lua/src/lua.c, branch masterLua Configuration Interface (mirror)https://git-03.infra.openwrt.org/project/luci/atom?h=master2022-10-24T23:03:36Zucode-mod-lua: improve error reporting2022-10-24T23:03:36ZJo-Philipp Wich2022-09-15T14:25:27Zurn:sha1:c1ceeebdd037e0d3e591fff1241482f118eef286
Avoid redundancies in generated exception messages and include Lua
tracebacks when catching exceptions in protected calls.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
ucode-mod-lua: various fixes2022-08-29T22:06:15ZJo-Philipp Wich2022-08-26T12:11:57Zurn:sha1:629eb171b7ec47c7f608962d013a4f7894fac00d
Properly handle accesses to properties of the userdatum itself in the
lua_uv_index() __index metamethod and treat integer keys as array indexes
in case of wrapped ucode array values. Also fix an incorrect refcount
decrement in the function.
Also fix uc_lua_vm_get() and uc_lua_lv_getraw() to gracefully handle
accesses to not defined or non-table values and ensure that those functions
properly reset the Lua stack after they complete.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
ucode-mod-lua: support prototype lookups and method calls on ucode values2022-08-26T08:11:17ZJo-Philipp Wich2022-08-20T23:32:12Zurn:sha1:42201e336d53412c63dbfde934786841d7bf29d2
Expose ucode arrays and objects with prototypes as userdata proxy objects
to Lua and extend the userdata metadatable with an __index metamethod to
lookup not found properties in the ucode values prototype chain.
Also extend the __call metamethod implementation to infer method call
status from the activation record in order to invoke ucode functions with
the correct `this` context when called as method from Lua.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
ucode-mod-lua: add workaround for dynamic Lua extension loading2022-07-27T14:22:25ZJo-Philipp Wich2022-07-27T14:18:52Zurn:sha1:26afb7cbec6108b23c9381937489bb05a833c7e6
Reopen self with dlopen(RTLD_GLOBAL) in order to export liblua symbols for
runtime loading of dynamic Lua extensions.
Reported-by: Stijn Tintel <stijn@linux-ipv6.be>
Tested-by: Stijn Tintel <stijn@linux-ipv6.be>
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
contrib: introduce ucode-mod-lua2022-05-30T12:25:33ZJo-Philipp Wich2022-05-19T15:10:17Zurn:sha1:70ff5c3c4a0c30f15cc0d115011f5d9ac6146ef6
The ucode-mod-lua library provides an ucode-to-Lua bridge and a set of
functions to instantiate Lua VMs, invoke Lua functions as well as
exchanging data structures between ucode and Lua.
Example usage:
#!/usr/bin/ucode
'use strict';
const lua = require("lua");
let vm = lua.create();
vm.set({
hello: function(...args) {
print(`A ucode "Hello world" function called from Lua! Got arguments: ${args}\n`);
},
data_from_ucode: {
bool: true,
float: 1.3,
int: 0x11223344,
string: "Hello from ucode!",
array: [ 1, 2, 3, null, 5 ],
object: {
apple: "green",
banana: "yellow",
[5]: "foo",
[-1]: null,
nested: {
a: [ 5, 6 ],
b: { c: NaN }
}
},
regexp: /foo/
}
});
vm.invoke("hello", true, 123, "Foo");
vm.eval('print("Print from Lua!", data_from_ucode.int * data_from_ucode.float);');
try {
vm.invoke("error", "Throwing a Lua exception...");
}
catch (e) {
print(`Caught exception: ${e}\n`);
}
print(`Lua VM version is: ${vm.get('_G', '_VERSION').value()}\n`);
Signed-off-by: Jo-Philipp Wich <jo@mein.io>