A project in-between luv and luvit.
The goal of this is to make building luvit and derivatives much easier.
Luvi has a somewhat unique, but very easy workflow for creating self-contained binaries on systems that don't have a compiler.
# Make a folder
git init myapp
# Write the app
vim myapp/main.lua
# Run the app
luvi myapp
# Build the binary when done
luvi myapp -o mybinary
# Build the binary with compiled Lua bytecode
luvi myapp -o mybinary --compile
# Build the binary with compiled and stripped Lua bytecode
luvi myapp -o mybinary --strip
# Run the new self-contained binary
./mybinary
# Deploy / Publish / Profit!
Your main.lua
is run in either a mostly stock lua or luajit environment with a few extra things added. Luajit
is built with LUAJIT_ENABLE_LUA52COMPAT
features turned on, and all luajit extensions are available. Lua is built
with the bit
library included, for parity with luajit.
The "uv" module contains bindings to libuv as defined in the luv project. Simply require("uv")
to access it.
The "uv" module is also provided under the name "luv" for parity with luarocks, so require("luv")
will also work.
Use this for file I/O, network I/O, timers, or various interfaces with the operating system. This lets you write fast non-blocking network servers or frameworks. The APIs in luv mirror what's in libuv allowing you to add whatever API sugar you want on top be it callbacks, coroutines, or whatever.
Just be sure to call uv.run()
and the end of your script to start the event loop if you want to actually wait for any
events to happen.
local uv = require('uv')
local function setTimeout(timeout, callback)
local timer = uv.new_timer()
local function ontimeout()
print("ontimeout", self)
uv.timer_stop(timer)
uv.close(timer)
callback(self)
end
uv.timer_start(timer, timeout, 0, ontimeout)
return timer
end
setTimeout(1000, function ()
print("This happens later")
end)
print("This happens first")
-- This blocks till the timer is done
uv.run()
The raw argc
and argv
from C side is exposed as a zero indexed lua table of strings at args
. The 0
-th
element is generally the name of the binary that was executed.
print("Your arguments were")
for i = 0, #args do
print(i, args[i])
end
The "env" module provides read/write access to your local environment variables via env.keys
, env.get
, env.put
,
env.set
, and env.unset
.
If you return an integer from main.lua
it will be your program's exit code.
If you're running from a unzipped folder on disk or a zipped bundle appended to the binary, the I/O to read from this
is the same. This is exposed as the bundle
property in the "luvi" module.
local bundle = require("luvi").bundle
local files = bundle.readdir("")
Load metadata about a file in the bundle. This includes type
("file" or "directory"), mtime
(in ms since epoch),
and size
(in bytes).
If the file doesn't exist, it returns nil
.
Read a directory. Returns a list of filenames in the directory.
If the directory doesn't exist, it return nil
.
Read the contents of a file. Returns a string if the file exists and nil
if it doesn't.
We maintain several binary releases of luvi to ease bootstrapping of lit and luvit apps.
The following platforms are actively supported and tested by the CI system:
The following platforms are supported but not actively tested by the CI system:
Platform support is primarily based on libuv's platform support.
Architecture support is primarily based on luajit's platform support.
If you want to not wait for pre-built binaries and dive right in, building is based on CMake and is pretty simple.
First clone this repo recursively.
git clone --recursive https://github.com/luvit/luvi.git
[!IMPORTANT] If you're on windows, for all following steps you will need to be in a Visual Studio Command Prompt.
You will need to replace
make
withnmake
in the following commands.
Then enter the directory and run the makefile inside it, which will assume you have all the dependencies installed, primarily CMake.
Prior to building luvi you must configure the version of luvi that you want to build. Currently there are two versions:
tiny
: only the necessities, includes only Lua, Libuv, miniz, and minimal luvi modules.regular
: the normal luvit experience, includes OpenSSL, LPeg, and lrexlib.cd luvi
make regular
make
make test
When that's done you should have a luvi binary in build/luvi
.
$ ls -lh build/luvi
-rwxr-xr-x 1 tim tim 948K Nov 20 16:39 build/luvi
Run it to see usage information:
$ luvi -h
Usage: luvi bundle+ [options] [-- extra args]
bundle Path to directory or zip file containing bundle source.
`bundle` can be specified multiple times to layer bundles
on top of each other.
--version Show luvi version and compiled in options.
--output target Build a luvi app by zipping the bundle and inserting luvi.
--main path Specify a custom main bundle path (normally main.lua)
--compile Compile Lua code into bytecode before bundling.
--strip Compile Lua code and strip debug info.
--force Ignore errors when compiling Lua code.
--help Show this help file.
-- All args after this go to the luvi app itself.
Examples:
# Run an app from disk, but pass in arguments
luvi path/to/app -- app args
# Run from a app zip
luvi path/to/app.zip
# Run an app that layers on top of luvit
luvi path/to/app path/to/luvit
# Bundle an app with luvi to create standalone
luvi path/to/app -o target
./target some args
# Run unit tests for a luvi app using custom main
luvi path/to/app -m tests/run.lua
You can run the sample repl app by doing:
build/luvi samples/repl.app
Ot the test suite with:
build/luvi samples/test.app
You can use the predefined makefile targets if you want or use cmake directly for more control.
WithOpenSSL (Default: OFF) - Enable OpenSSL Support
WithOpenSSLASM (Default: OFF) - Enable OpenSSL Assembly Optimizations
WithSharedOpenSSL (Default: ON) - Use System OpenSSL Library
Otherwise use static library
OPENSSL_ROOT_DIR - Override the OpenSSL Root Directory
OPENSSL_INCLUDE_DIR - Override the OpenSSL Include Directory
OPENSSL_LIBRARIES - Override the OpenSSL Library Path
Example (Static OpenSSL):
cmake \
-DWithOpenSSL=ON \
-DWithSharedOpenSSL=OFF \
..
Example (Shared OpenSSL):
cmake \
-DWithSharedOpenSSL=ON \
-DWithOpenSSL=ON \
-DOPENSSL_ROOT_DIR=/usr/local/opt/openssl \
-DOPENSSL_INCLUDE_DIR=/usr/local/opt/openssl/include \
-DOPENSSL_LIBRARIES=/usr/local/opt/openssl/lib \
..