feat: Add CLI to python package (#350)

Usage with uv for example:

`uv run -m encoderfile build ...`

Author: besaleli

encoderfile-py/python/encoderfile/__main__.py

@@ -0,0 +1,10 @@
+from encoderfile import run_cli
+import sys
+
+if __name__ == "__main__":
+    args = ["encoderfile"] + sys.argv[1:]
+
+    try:
+        run_cli(args)
+    except RuntimeError as e:
+        print(e, file=sys.stderr)

encoderfile-py/src/cli.rs

@@ -0,0 +1,7 @@
+use pyo3::{exceptions::PyRuntimeError, prelude::*};
+
+// For use ONLY in encoderfile-py's __main__.py
+#[pyfunction]
+pub fn run_cli(args: Vec<String>) -> PyResult<()> {
+    encoderfile::builder::cli::run_cli(args).map_err(|e| PyRuntimeError::new_err(format!("{}", e)))
+}

encoderfile-py/src/lib.rs

@@ -1,6 +1,7 @@
 use pyo3::prelude::*;
 
 mod builder;
+mod cli;
 
 /// A Python module implemented in Rust.
 #[pymodule(name = "_core")]
@@ -31,4 +32,7 @@ mod encoderfile {
 
     #[pymodule_export]
     use super::builder::PyTokenizerBuildConfig;
+
+    #[pymodule_export]
+    use super::cli::run_cli;
 }

encoderfile/src/builder/cli/mod.rs

@@ -13,6 +13,14 @@ pub use build::{test_build_args, test_build_args_working_dir};
 pub use build::BuildArgs;
 pub use inspect::inspect_encoderfile;
 
+pub fn run_cli(args: Vec<String>) -> Result<()> {
+    use clap::Parser;
+
+    let cli = Cli::try_parse_from(args).map_err(|e| anyhow::anyhow!(e))?;
+
+    cli.command.run(&cli.global_args)
+}
+
 #[derive(Debug, Parser)]
 pub struct Cli {
     #[command(subcommand)]