uses clap to simplify CLI

This commit is contained in:
Kevin K 2015-08-01 00:59:05 -04:00
parent c64f3ac973
commit c7361704b9
2 changed files with 64 additions and 166 deletions

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@ -4,7 +4,7 @@ version = "0.0.1"
authors = ["Mathieu David <mathieudavid@mathieudavid.org>"]
[dependencies]
getopts = "*"
clap = "*"
handlebars = "*"
rustc-serialize = "*"
pulldown-cmark = "*"

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@ -1,178 +1,76 @@
extern crate mdbook;
extern crate getopts;
#[macro_use]
extern crate clap;
use std::env;
use std::error::Error;
use std::io::{self, Write};
use std::path::{Path, PathBuf};
use clap::{App, ArgMatches, SubCommand};
use mdbook::MDBook;
const NAME: &'static str = "mdbook";
const VERSION: &'static str = "0.0.1";
#[derive(Clone)]
struct Subcommand {
name: &'static str,
help: &'static str,
exec: fn(args: Vec<String>)
}
// All subcommands
static SUBCOMMANDS: &'static [Subcommand] = &[
Subcommand{ name: "init", help: " Create boilerplate structure and files in the directory", exec: init },
Subcommand{ name: "build", help: "Build the book from the markdown files", exec: build },
Subcommand{ name: "watch", help: "Watch the files for changes", exec: watch },
];
fn main() {
let args: Vec<String> = env::args().collect();
let mut subcommand: Option<Subcommand> = None;
// Create a list of valid arguments and sub-commands
let matches = App::new(NAME)
.about("Create a book in form of a static website from markdown files")
.author("Mathieu David <mathieudavid@mathieudavid.org>")
// Get the version from our Cargo.toml using clap's crate_version!() macro
.version(&*format!("v{}", crate_version!()))
.subcommand_required(true)
.after_help("For more information about a specific command, try `mdbook <command> --help`")
.subcommand(SubCommand::with_name("init")
.about("Create boilerplate structure and files in the directory")
// the {n} denotes a newline which will properly aligned in all help
// messages
.arg_from_usage("[dir] 'A directory for your book{n}(Defaults to Current Directory when ommitted)'"))
.subcommand(SubCommand::with_name("build")
.about("Build the book from the markdown files")
.arg_from_usage("[dir] 'A directory for your book{n}(Defaults to Current Directory when ommitted)'"))
.subcommand(SubCommand::with_name("watch")
.about("Watch the files for changes"))
.get_matches();
if args.len() > 1 {
// Check if one of the subcommands match
for command in SUBCOMMANDS {
if args[1] == command.name {
subcommand = Some(command.clone());
}
// Check which subcomamnd the user ran...
let res = match matches.subcommand() {
("init", Some(sub_matches)) => init(sub_matches),
("build", Some(sub_matches)) => build(sub_matches),
("watch", _) => unimplemented!(),
(_, _) => unreachable!()
};
if let Err(e) = res {
writeln!(&mut io::stderr(), "Error: {}", e).ok();
}
}
fn init(args: &ArgMatches) -> Result<(), Box<Error>> {
let book_dir = get_book_dir(args);
let book = MDBook::new(&book_dir);
book.init()
}
fn build(args: &ArgMatches) -> Result<(), Box<Error>> {
let book_dir = get_book_dir(args);
let mut book = MDBook::new(&book_dir);
book.build()
}
fn get_book_dir(args: &ArgMatches) -> PathBuf {
if let Some(dir) = args.value_of("dir") {
// Check if path is relative from current dir, or absolute...
let p = Path::new(dir);
if p.is_relative() {
env::current_dir().unwrap().join(dir)
} else {
p.to_path_buf()
}
}
match subcommand {
None => no_subcommand(args),
Some(command) => (command.exec)(args),
}
}
fn no_subcommand(args: Vec<String>) {
let mut opts = getopts::Options::new();
opts.optflag("h", "help", "display this help and exit");
opts.optflag("", "version", "output version information and exit");
let usage = opts.usage("Create a book in form of a static website from markdown files");
let matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(e) => {
println!("{}", e);
println!("Try `{} --help` for more information", NAME);
return;
},
};
if matches.opt_present("version") {
println!("{} {}", NAME, VERSION);
} else {
if !matches.opt_present("version") && args.len() > 0 {
print!("Try again, `{0}", NAME);
for index in 1..args.len() {
print!(" {}", args[index]);
}
print!("` is not a valid command... ");
println!("\n");
}
help(&usage);
}
}
fn help(usage: &String) {
println!("{0} {1} \n", NAME, VERSION);
println!("Usage:");
println!(" {0} <command> [<args>...]\n {0} [options]\n", NAME);
println!("{0}", usage);
println!("Commands:");
for subcommand in SUBCOMMANDS {
println!(" {0} {1}", subcommand.name, subcommand.help);
}
println!("");
println!("For more information about a specific command, try `mdbook <command> --help`");
}
fn init(args: Vec<String>) {
let mut opts = getopts::Options::new();
opts.optflag("h", "help", "display this help and exit");
let usage = opts.usage("Creates a skeleton structure and some boilerplate files to start with");
let matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(e) => {
println!("{}", e);
println!("Try `{} --help` for more information", NAME);
return;
},
};
if matches.opt_present("help") {
println!("{}", usage);
return;
}
let dir = if args.len() <= 2 {
std::env::current_dir().unwrap()
} else {
std::env::current_dir().unwrap().join(&args[2])
};
let book = MDBook::new(&dir);
if let Err(e) = book.init() {
println!("Error: {}", e);
}
}
fn build(args: Vec<String>) {
let mut opts = getopts::Options::new();
opts.optflag("h", "help", "display this help and exit");
let usage = opts.usage("Build the book from the markdown files");
let matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(e) => {
println!("{}", e);
println!("Try `{} --help` for more information", NAME);
return;
},
};
if matches.opt_present("help") {
println!("{}", usage);
}
let dir = if args.len() <= 2 {
std::env::current_dir().unwrap()
} else {
std::env::current_dir().unwrap().join(&args[2])
};
let mut book = MDBook::new(&dir);
if let Err(e) = book.build() {
println!("Error: {}", e);
}
}
fn watch(args: Vec<String>) {
let mut opts = getopts::Options::new();
opts.optflag("h", "help", "display this help and exit");
let usage = opts.usage("Watch the files for changes");
let matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(e) => {
println!("{}", e);
println!("Try `{} --help` for more information", NAME);
return;
},
};
if matches.opt_present("help") {
println!("{}", usage);
env::current_dir().unwrap()
}
}