matthiasbeyer/imag
1
0
Fork 0
Code Releases Activity

Add some comments

Browse source
This commit is contained in:
Mario Krehl 2016-09-07 11:07:02 +02:00
parent c828bed0e1
commit d69b8498e9
1 changed files with 17 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
bin/src/main.rs
View file

@ -20,6 +20,8 @@ use clap::{Arg, AppSettings, SubCommand};
use libimagrt::runtime::Runtime;
use libimagerror::trace::trace_error;
/// Returns the helptext, putting the Strings in cmds as possible
/// subcommands into it
fn help_text(cmds: Vec<String>) -> String {
let text = format!(r#"
@ -60,7 +62,7 @@ fn help_text(cmds: Vec<String>) -> String {
text
}
/// Returns the list of imag-* executables found in $PATH
fn get_commands() -> Vec<String> {
let path = env::var("PATH");
if path.is_err() {
@ -108,11 +110,12 @@ fn get_commands() -> Vec<String> {
fn main() {
// Initialize the Runtime and build the CLI
let appname = "imag";
let version = &version!();
let about = "imag - the PIM suite for the commandline";
let commands = get_commands();
let helptext = help_text(commands);
let helptext = help_text(commands.clone());
let app = Runtime::get_default_cli_builder(appname, version, about)
.settings(&[AppSettings::AllowExternalSubcommands, AppSettings::ArgRequiredElseHelp])
.arg(Arg::with_name("version")
@ -139,6 +142,8 @@ fn main() {
debug!("matches: {:?}", matches);
// Begin checking for arguments
if matches.is_present("version") {
debug!("Showing version");
println!("imag {}", &version!()[..]);
@ -168,15 +173,19 @@ fn main() {
}
}
// Matches any subcommand given
match matches.subcommand() {
(subcommand, Some(scmd)) => {
debug!("Calling with subcommand: {}", subcommand);
// Get all given arguments and further subcommands to pass to
// the imag-<> binary
// Providing no arguments is OK, and is therefore ignored here
let subcommand_args : Vec<&str> = match scmd.values_of("") {
Some(values) => values.collect(),
None => Vec::new()
};
if !get_commands().contains(&String::from(subcommand)) {
// Typos happen, so check if the given subcommand is one found in $PATH
if !commands.clone().contains(&String::from(subcommand)) {
println!("No such command: 'imag-{}'", subcommand);
println!("See 'imag --help' for available subcommands");
exit(2);
@ -184,6 +193,7 @@ fn main() {
debug!("Calling 'imag-{}' with args: {:?}", subcommand, subcommand_args);
// Create a Command, and pass it the gathered arguments
match Command::new(format!("imag-{}", subcommand))
.stdin(Stdio::inherit())
.stdout(Stdio::inherit())
@ -223,9 +233,8 @@ fn main() {
}
}
},
// clap ensures we have valid input by exiting if not.
// The above case is a catch-all for subcommands,
// so nothing else needs to be expexted.
_ => unreachable!(),
// Calling for example 'imag --versions' will lead here, as this option does not exit.
// There's nothing to do in such a case
_ => {},
}
}