First program

Write a TypeScript file:

hello.ts

const xs: number[] = [1, 2, 3];
console.log(`hello ${xs.reduce((a, b) => a + b, 0)}`);

Build it into a native executable and run it:

xisto build -o hello hello.ts && ./hello

hello 6

xisto build only compiles: it writes the executable (-o hello; without -o, the file's name without .ts) and does not run it. The default is a release build (-O2).

Run without a build step

While you are editing, xisto run compiles to a temporary file and runs it, passing on any arguments after the file name:

xisto run hello.ts

Add --dev for a fast compile without optimization, for the edit loop:

xisto run --dev hello.ts
xisto build --dev hello.ts

Use a release build (the default) for anything you measure or deploy.

See the C

xisto emit prints the C that xisto generates for a file:

xisto emit hello.ts

A project instead of a file

For more than one file, or to use packages, start a project with xisto init: it creates xisto.json, src/main.ts and a .gitignore, and then xisto run and xisto build need no file name.

xisto init hello && cd hello
xisto run                      # Hello, world!
xisto build                    # ./hello

Next: a NestJS app in a few commands, or Projects and packages.