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// Copyright 2017 rust-ipfs-api Developers
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
//
use clap::{App, ArgMatches};
use futures::Future;
use ipfs_api::IpfsClient;
use std::error::Error;
use std::fs;
use std::path::Path;
pub type CommandExecutable = Box<Future<Item = (), Error = ()> + 'static + Send>;
pub const EXPECTED_FILE: &str = "expected to read input file";
/// Verifies that a path points to a file that exists, and not a directory.
///
pub fn verify_file<P>(path: P) -> Result<(), String>
where
P: AsRef<Path>,
{
match fs::metadata(path) {
Ok(ref metadata) if metadata.is_file() => Ok(()),
Ok(_) => Err("file must not be a directory".into()),
Err(e) => Err(e.description().into()),
}
}
pub trait CliCommand {
/// Name of the command.
///
const NAME: &'static str;
/// Returns the signature of the application.
///
fn signature<'a, 'b>() -> App<'a, 'b>;
/// Creates a future representing the request to make.
///
fn handle(client: &IpfsClient, args: &ArgMatches) -> CommandExecutable;
}
macro_rules! handle_case {
// Base macro case. Converts an expression into a boxed future.
//
($run: expr) => {
{
let future = $run;
return Box::new(future.map_err(|e| eprintln!("{}", e)))
}
};
// Base case for nested subcommand (e.g. /bootstrap/add).
//
(
$subcommand: ident;
($key: pat) => { $(($inner_key: pat, $args: ident) => $run: expr),* }
) => {
if let ($key, Some(args)) = $subcommand {
let inner_subcommand = args.subcommand();
$(
handle_case!(inner_subcommand; ($inner_key, $args) => $run);
)*
}
};
// Base case for subcommand.
//
(
$subcommand: ident;
($key: pat, $args: pat) => $run: expr
) => {
if let ($key, Some($args)) = $subcommand {
handle_case!($run)
}
};
// Recursive case for nested subcommand.
//
(
$subcommand: ident;
($key: pat) => { $(($inner_key: pat, $args: ident) => $run: expr),* },
$($rest_args: tt => $rest_run: tt),*
) => {
handle_case!($subcommand; ($key) => { $(($inner_key, $args) => $run),* });
$(
handle_case!($subcommand; $rest_args => $rest_run);
)*
};
// Recursive case fo subcommand.
//
(
$subcommand: ident;
($key: pat, $args: pat) => $run: expr,
$($rest_args: tt => $rest_run: tt),*
) => {
handle_case!($subcommand; ($key, $args) => $run);
$(
handle_case!($subcommand; $rest_args => $rest_run);
)*
}
}
macro_rules! handle {
// Command with no subcommands.
//
(
($args: ident, $client: ident) => $run: expr
) => {
fn handle(
client: &::ipfs_api::IpfsClient,
args: &::clap::ArgMatches,
) -> ::command::CommandExecutable {
let $args = args;
let $client = client;
handle_case!($run)
}
};
// Command with one or more subcommands.
//
(
$client: ident;
$($args: tt => $run: tt),*
) => {
fn handle(
client: &::ipfs_api::IpfsClient,
args: &::clap::ArgMatches,
) -> ::command::CommandExecutable {
let $client = client;
let subcommand = args.subcommand();
handle_case!(subcommand; $($args => $run),*);
unreachable!()
}
}
}
pub mod add;
pub mod bitswap;
pub mod block;
pub mod bootstrap;
pub mod cat;
pub mod commands;
pub mod config;
pub mod dag;
pub mod dht;
pub mod diag;
pub mod dns;
pub mod file;
pub mod files;
pub mod filestore;
pub mod shutdown;
pub mod version;
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