cpy

C++ Pythony, an alternative to shell script.

Mostly experimenting with Tree-sitter and creating an AST.

Build

cd grammar && tree-sitter generate
cd ..
meson setup build
meson compile -C build

Test

meson test -C build

---

Ideas

• Statically typed
• Language has knowledge of procceses, files, etc

Modules

• file
  • search, exist, create, delete, etc
• env (environment vars)
  • exist, set, search
• proc (processes)
  • run, pipe, redirect output

Access with <module_name>::<function>, i.e. file::exist("foo.txt")

Files

• exists
• size
• permissions
• create
• delete
• copy
• move

dir := file::list("some/dir");
for (file in dir) {
  cout << file.name() << " @ " << file.size() << " bytes";
}

file::create("some/file.txt");

Control Flow

• conditional: if
• loops: for, while
• return: return, return_if

if (!file::exist("some/file.txt")) {
  return_if !file::create("some/file.txt");

  return parse_file("some/file.txt");
}

Processes

• Execution
• Exit code
• stdout, stderr
• redirection

grep_debug := proc::grep("log.txt", "^\[DEBUG\]");
cout << grep_debug | proc::line_count;

grep_debug := proc::grep("log.txt", "^\[DEBUG\]");
grep_result := grep_debug.run();
file::create("result.txt", grep_result);

Environment Vars

• Get
• Set
• Search

home := env::get("HOME");
env::create("BUILD_DIR", home + "/projects/blah/build");