Replaced docopt with clap for command line argument parsing.

Cargo.lock

@@ -5,10 +5,8 @@ name = "Led"
 version = "0.0.2"
 dependencies = [
  "backend 0.1.0",
- "docopt 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ropey 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "termion 1.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -16,11 +14,21 @@ dependencies = [
 ]
 
 [[package]]
-name = "aho-corasick"
+name = "ansi_term"
-version = "0.7.6"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -32,20 +40,31 @@ dependencies = [
 ]
 
 [[package]]
-name = "docopt"
+name = "bitflags"
-version = "1.1.0"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "clap"
+version = "2.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "strsim 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "lazy_static"
+name = "hermit-abi"
-version = "1.4.0"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "libc"
@@ -57,32 +76,11 @@ name = "maybe-uninit"
 version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "memchr"
-version = "2.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "numtoa"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "proc-macro2"
-version = "1.0.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "quote"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.1.56"
@@ -96,22 +94,6 @@ dependencies = [
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "regex"
-version = "1.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "aho-corasick 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "regex-syntax"
-version = "0.6.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "ropey"
 version = "1.1.0"
@@ -120,24 +102,6 @@ dependencies = [
  "smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "serde"
-version = "1.0.104"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "serde_derive 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "serde_derive"
-version = "1.0.104"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "smallvec"
 version = "0.6.13"
@@ -153,19 +117,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "strsim"
-version = "0.9.3"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "syn"
-version = "1.0.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "termion"
 version = "1.5.5"
@@ -178,11 +132,11 @@ dependencies = [
 ]
 
 [[package]]
-name = "thread_local"
+name = "textwrap"
-version = "1.0.1"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -196,33 +150,49 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "unicode-xid"
+name = "vec_map"
-version = "0.2.0"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
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+"checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
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Cargo.toml

@@ -19,9 +19,7 @@ ropey = "1"
 # ropey = { git = "https://github.com/cessen/ropey", branch = "master" }
 unicode-segmentation = "1"
 unicode-width = "0.1"
-serde = "1"
+clap = "2"
-serde_derive = "1"
-docopt = "1"
 smallvec = "1"
 termion = "1"
 

src/main.rs

@@ -1,14 +1,4 @@
-extern crate docopt;
+use clap::{App, Arg};
-extern crate ropey;
-extern crate serde;
-#[macro_use]
-extern crate serde_derive;
-extern crate smallvec;
-extern crate termion;
-extern crate unicode_segmentation;
-extern crate unicode_width;
-
-use docopt::Docopt;
 use editor::Editor;
 use std::path::Path;
 use term_ui::formatter::ConsoleLineFormatter;
@@ -21,31 +11,24 @@ mod string_utils;
 mod term_ui;
 mod utils;
 
-// Usage documentation string
+const VERSION: &str = env!("CARGO_PKG_VERSION");
-static USAGE: &'static str = "
-Usage: led [options] [<file>]
-       led --help
-
-Options:
-    -h, --help  Show this message
-";
-
-// Struct for storing command-line arguments
-#[derive(Debug, Deserialize)]
-struct Args {
-    arg_file: Option<String>,
-    flag_help: bool,
-}
 
 fn main() {
-    // Get command-line arguments
+    // Parse command line arguments.
-    let args: Args = Docopt::new(USAGE)
+    let args = App::new("Led")
-        .and_then(|d| d.deserialize())
+        .version(VERSION)
-        .unwrap_or_else(|e| e.exit());
+        .about("A text editor")
+        .arg(
+            Arg::with_name("file")
+                .help("Text file to open")
+                .required(false)
+                .index(1),
+        )
+        .get_matches();
 
     // Load file, if specified
-    let editor = if let Option::Some(s) = args.arg_file {
+    let editor = if let Some(filepath) = args.value_of("file") {
-        Editor::new_from_file(ConsoleLineFormatter::new(4), &Path::new(&s[..]))
+        Editor::new_from_file(ConsoleLineFormatter::new(4), &Path::new(&filepath[..]))
     } else {
         Editor::new(ConsoleLineFormatter::new(4))
     };