fallow_cli/
error.rs

1use std::process::ExitCode;
2
3use fallow_config::OutputFormat;
4
5/// Emit an error as structured JSON on stdout when `--format json` is active,
6/// then return the given exit code. For non-JSON formats, emit to stderr as usual.
7pub fn emit_error(message: &str, exit_code: u8, output: OutputFormat) -> ExitCode {
8    emit_error_with_style(message, exit_code, output, requested_json_style())
9}
10
11fn requested_json_style() -> crate::json_style::JsonStyle {
12    if std::env::args_os().any(|arg| arg == "--pretty") {
13        crate::json_style::JsonStyle::Pretty
14    } else {
15        crate::json_style::JsonStyle::Compact
16    }
17}
18
19#[expect(
20    clippy::print_stdout,
21    clippy::print_stderr,
22    reason = "structured error emission for CLI surfaces"
23)]
24pub fn emit_error_with_style(
25    message: &str,
26    exit_code: u8,
27    output: OutputFormat,
28    json_style: crate::json_style::JsonStyle,
29) -> ExitCode {
30    if matches!(output, OutputFormat::Json) {
31        let error_obj = fallow_output::ErrorOutput::new(message, exit_code);
32        if let Ok(json) = json_style.serialize(&error_obj) {
33            println!("{json}");
34        }
35    } else {
36        eprintln!("Error: {message}");
37    }
38    ExitCode::from(exit_code)
39}
fallow_cli/error.rs

fallow_cli/
error.rs
