extern crate docopt;
extern crate lalrpop;
extern crate rustc_serialize;
use docopt::Docopt;
use lalrpop::Configuration;
use std::env;
use std::io::{self, Write};
use std::process;
fn main() {
main1().unwrap();
}
fn main1() -> io::Result<()> {
let mut stderr = std::io::stderr();
let args: Args =
Docopt::new(USAGE)
.and_then(|d| d.argv(env::args()).decode())
.unwrap_or_else(|e| e.exit());
let mut config = Configuration::new();
match args.flag_level.unwrap_or(LevelFlag::Info) {
LevelFlag::Quiet => config.log_quiet(),
LevelFlag::Info => config.log_info(),
LevelFlag::Verbose => config.log_verbose(),
LevelFlag::Debug => config.log_debug(),
};
if args.flag_force {
config.force_build(true);
}
if args.flag_color {
config.always_use_colors();
}
if args.flag_comments {
config.emit_comments(true);
}
if args.arg_inputs.len() == 0 {
try!(writeln!(stderr, "Error: no input files specified! Try --help for help."));
process::exit(1);
}
for arg in args.arg_inputs {
match config.process_file(&arg) {
Ok(()) => { }
Err(err) => {
try!(writeln!(stderr, "Error encountered processing `{}`: {}",
arg, err));
process::exit(1);
}
}
}
Ok(())
}
const USAGE: &'static str = "
Usage: lalrpop [options] <inputs>...
lalrpop --help
Options:
-l, --level LEVEL Set the debug level. (Default: info)
Valid values: quiet, info, verbose, debug.
-f, --force Force execution, even if the .lalrpop file is older than the .rs file.
-c, --color Force colorful output, even if this is not a TTY.
--comments Enable comments in the generated code.
";
#[derive(Debug, RustcDecodable)]
struct Args {
arg_inputs: Vec<String>,
flag_level: Option<LevelFlag>,
flag_force: bool,
flag_color: bool,
flag_comments: bool,
}
#[derive(Debug, RustcDecodable)]
enum LevelFlag {
Quiet, Info, Verbose, Debug
}
#[cfg(test)]
mod test {
use docopt::Docopt;
use super::USAGE;
use super::Args;
#[test]
fn test_usage_help() {
let argv = || vec!["lalrpop", "--help"];
let _: Args = Docopt::new(USAGE)
.and_then(|d| d.help(false).argv(argv().into_iter()).decode())
.unwrap();
}
#[test]
fn test_usage_single_input() {
let argv = || vec!["lalrpop", "file.lalrpop"];
let _: Args = Docopt::new(USAGE)
.and_then(|d| d.argv(argv().into_iter()).decode())
.unwrap();
}
#[test]
fn test_usage_multiple_inputs() {
let argv = || vec!["lalrpop", "file.lalrpop", "../file2.lalrpop"];
let _: Args = Docopt::new(USAGE)
.and_then(|d| d.argv(argv().into_iter()).decode())
.unwrap();
}
}