cosmo-lua
Use cosmopolitan Lua (cosmo-lua) for portable scripts. Includes HTTP, JSON, unix syscalls, path utils, regex, sqlite, argon2.
安装与使用
请根据来源仓库和你的 AI 工具说明安装此技能。先阅读技能文件和依赖要求，再添加到工作流。
查看来源 ↗使用指南技能说明
Cosmo Lua
Portable Lua 5.4 with batteries included. Single binary runs on Linux, macOS, Windows, FreeBSD, OpenBSD, NetBSD.
Installation
curl -L -o lua https://github.com/whilp/cosmopolitan/releases/latest/download/lua
chmod +x lua
./lua --skill # install this skill
Getting Help
The executable has built-in documentation. help is a global function:
./lua -e 'help("cosmo.Fetch")' # look up a function
./lua -e 'help("cosmo.unix")' # list module functions
./lua -e 'help.search("socket")' # search by keyword
In the REPL:
help() -- overview of all modules
help("cosmo.Fetch") -- function docs
help("cosmo.unix") -- module functions
Quick Reference
Top-level functions: local cosmo = require("cosmo")
Submodules: local unix = require("cosmo.unix")
HTTP & Networking (replaces curl, luasocket)
| Function | Purpose |
|---|---|
Fetch(url) |
HTTP GET/POST with redirects, TLS, proxy support |
ResolveIp(host) |
DNS lookup |
ParseUrl(url) |
Parse URL into components |
FormatIp(ip) |
Format IP address |
IsPublicIp(ip) |
Check if IP is public |
JSON (replaces dkjson, cjson)
| Function | Purpose |
|---|---|
DecodeJson(str) |
Parse JSON string to Lua table |
EncodeJson(tbl) |
Encode Lua table to JSON string |
Encoding & Hashing
| Function | Purpose |
|---|---|
EncodeBase64(s) |
Base64 encode |
DecodeBase64(s) |
Base64 decode |
EncodeHex(s) |
Hex encode |
DecodeHex(s) |
Hex decode |
Sha256(s) |
SHA-256 hash |
Sha1(s) |
SHA-1 hash |
Md5(s) |
MD5 hash |
GetRandomBytes(n) |
Cryptographic random bytes |
Compression
| Function | Purpose |
|---|---|
Deflate(s) |
Compress with zlib |
Inflate(s) |
Decompress zlib |
Path Utilities: require("cosmo.path")
| Function | Purpose |
|---|---|
path.join(...) |
Join path components |
path.basename(p) |
Get filename from path |
path.dirname(p) |
Get directory from path |
path.exists(p) |
Check if path exists |
path.isfile(p) |
Check if path is file |
path.isdir(p) |
Check if path is directory |
POSIX/Unix: require("cosmo.unix")
| Function | Purpose |
|---|---|
unix.open(path, flags, mode) |
Open fd |
unix.read(fd) |
Read from fd |
unix.write(fd, data) |
Write to fd |
unix.close(fd) |
Close fd |
unix.chmod(path, mode) |
Change file mode |
unix.mkdir(path, mode) |
Create directory |
unix.makedirs(path, mode) |
Create directory tree |
unix.stat(path) |
Get file metadata |
unix.fork() |
Fork process |
unix.execve(prog, args) |
Execute program |
unix.environ() |
Get environment |
unix.getpid() |
Get process ID |
unix.sleep(secs) |
Sleep |
unix.clock_gettime() |
High-resolution time |
Octal modes: Lua has no octal literals. Use tonumber("755", 8) for modes.
See help("unix") for 100+ additional syscall wrappers.
Regular Expressions: require("cosmo.re")
| Function | Purpose |
|---|---|
re.search(pattern, str) |
Search for pattern |
re.compile(pattern) |
Compile regex for reuse |
regex:search(str) |
Search with compiled regex |
SQLite: require("cosmo.lsqlite3")
| Function | Purpose |
|---|---|
sqlite.open(path) |
Open database |
sqlite.open_memory() |
Open in-memory database |
db:exec(sql) |
Execute SQL |
db:prepare(sql) |
Prepare statement |
stmt:step() |
Execute prepared statement |
db:close() |
Close database |
Password Hashing: require("cosmo.argon2")
| Function | Purpose |
|---|---|
argon2.hash_encoded(pw, salt) |
Hash password |
argon2.verify(encoded, pw) |
Verify password |
Example
local cosmo = require("cosmo")
local path = require("cosmo.path")
-- Fetch JSON from an API
local status, headers, body = cosmo.Fetch("https://api.example.com/data")
if status == 200 then
local data = cosmo.DecodeJson(body)
print(data.message)
end
-- Work with files
local configpath = path.join(os.getenv("HOME"), ".config", "app.json")
if path.exists(configpath) then
local f = io.open(configpath)
local config = cosmo.DecodeJson(f:read("*a"))
f:close()
end
More Information
Use help.search(keyword) to find functions. The help system has complete documentation for all functions including parameters, return values, and examples.
使用示例
查看来源仓库中的使用示例与配置说明。
查看来源 ↗来源历史
- 收录时间
- 2026-01-20
- 索引更新时间
- 2026-01-26
- Branch
- main
收录与同步日期属于本站记录。源码修改历史请查看来源仓库。
GitHub ↗chat Comments (0)
Sign in to join the discussion and leave a comment.
No comments yet. Be the first to share your thoughts!