Add clap for parsing command line arguments

Cargo.lock

@@ -15,12 +15,32 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
 
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "arc-swap"
 version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4d25d88fd6b8041580a654f9d0c581a047baee2b3efee13275f2fc392fc75034"
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "autocfg"
 version = "0.1.7"
@@ -76,6 +96,21 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "clap"
+version = "2.33.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdfa80d47f954d53a35a64987ca1422f495b8d6483c0fe9f7117b36c2a792129"
+dependencies = [
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
@@ -220,6 +255,15 @@ version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aaf91faf136cb47367fa430cd46e37a788775e7fa104f8b4bcb3861dc389b724"
 
+[[package]]
+name = "hermit-abi"
+version = "0.1.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3deed196b6e7f9e44a2ae8d94225d80302d81208b1bb673fd21fe634645c85a9"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -651,6 +695,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+
 [[package]]
 name = "syn"
 version = "0.13.11"
@@ -706,6 +756,7 @@ name = "taskwarrior-tui"
 version = "0.5.1"
 dependencies = [
  "chrono",
+ "clap",
  "crossterm",
  "rand 0.7.3",
  "serde",
@@ -716,6 +767,15 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "time"
 version = "0.1.43"
@@ -773,6 +833,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
 [[package]]
 name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"

Cargo.toml

@@ -20,6 +20,7 @@ crossterm-backend = ["tui/crossterm", "crossterm"]
 [dependencies]
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+clap = "2.33"
 task-hookrs = "0.7"
 rand = "0.7"
 shlex = "0.1"

src/app.rs

@@ -97,7 +97,7 @@ pub enum AppMode {
     TaskError,
 }
 
-pub struct App {
+pub struct TaskwarriorTUIApp {
     pub should_quit: bool,
     pub state: TableState,
     pub cursor_location: usize,
@@ -111,9 +111,9 @@ pub struct App {
     pub mode: AppMode,
 }
 
-impl App {
+impl TaskwarriorTUIApp {
-    pub fn new() -> App {
+    pub fn new() -> TaskwarriorTUIApp {
-        let mut app = App {
+        let mut app = TaskwarriorTUIApp {
             should_quit: false,
             state: TableState::default(),
             tasks: vec![],
@@ -724,7 +724,7 @@ impl App {
 
 #[cfg(test)]
 mod tests {
-    use crate::app::App;
+    use crate::app::TaskwarriorTUIApp;
     use crate::util::setup_terminal;
     use std::io::stdin;
 
@@ -733,7 +733,7 @@ mod tests {
 
     #[test]
     fn test_app() {
-        let mut app = App::new();
+        let mut app = TaskwarriorTUIApp::new();
         app.update();
 
         //println!("{:?}", app.tasks);

src/main.rs

@@ -16,8 +16,9 @@ use std::process::Command;
 use std::time::{Duration, Instant};
 use tui::backend::Backend;
 use unicode_width::UnicodeWidthStr;
+use clap::{Arg, App, SubCommand};
 
-use app::{App, AppMode};
+use app::{TaskwarriorTUIApp, AppMode};
 use crate::util::Key;
 
 use std::sync::{
@@ -30,6 +31,24 @@ const APP_NAME: &'static str = env!("CARGO_PKG_NAME");
 
 
 fn main() -> Result<(), Box<dyn Error>> {
+    let matches = App::new(APP_NAME)
+                          .version(APP_VERSION)
+                          .author("Dheepak Krishnamurthy <@kdheepak>")
+                          .about("A taskwarrior terminal user interface")
+                          .arg(Arg::with_name("config")
+                               .short("c")
+                               .long("config")
+                               .value_name("FILE")
+                               .help("Sets a custom config file")
+                               .takes_value(true))
+                          .get_matches();
+
+    let config = matches.value_of("config").unwrap_or("default.conf");
+    tui_main(config)?;
+    Ok(())
+}
+
+fn tui_main(config: &str) -> Result<(), Box<dyn Error>> {
     // Terminal initialization
     let mut terminal = setup_terminal();
     terminal.clear()?;
@@ -39,7 +58,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         tick_rate: Duration::from_millis(250),
     });
 
-    let mut app = App::new();
+    let mut app = TaskwarriorTUIApp::new();
     app.next();
 
     loop {