WIP channel filter

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

src/channel.rs

@@ -32,6 +32,17 @@ impl Channel {
             panic!("Failed to determine channel for {}", version)
         }
     }
+
+    pub fn from_name(name: &str) -> Channel {
+        match name {
+            "stable" => Channel::Stable,
+            "dev" => Channel::Dev,
+            "alpha" => Channel::Alpha,
+            "beta" => Channel::Beta,
+            "rc" => Channel::RC,
+            _ => panic!("Failed to parse channel from '{}'", name),
+        }
+    }
 }
 
 impl Clone for Channel {

src/main.rs

@@ -4,12 +4,13 @@ extern crate log;
 extern crate roxmltree;
 extern crate ureq;
 
-use clap::{crate_name, crate_version, App, Arg, ArgGroup};
-use log::{LevelFilter, Metadata, Record};
-
 mod channel;
 mod parse;
 
+use crate::channel::Channel;
+use clap::{crate_name, crate_version, App, Arg, ArgGroup};
+use log::{LevelFilter, Metadata, Record};
+
 /// Simple logger that simply outputs everything using println!()
 /// It prints all levels in debug builds, and nothing on release builds.
 struct StdOutLogger;
@@ -44,6 +45,11 @@ fn main() {
                 .short("a")
                 .long("all")
                 .takes_value(false),
+            Arg::with_name("channel")
+                .long("channel")
+                .takes_value(true)
+                .possible_values(&["stable", "alpha", "beta", "rc", "dev"])
+                .default_value("stable"),
             Arg::with_name("condensed")
                 .short("c")
                 .long("condensed")
@@ -61,7 +67,12 @@ fn main() {
                 println!("No results found!");
             } else if matches.is_present("condensed") || matches.is_present("all") {
                 for package in packages.iter() {
-                    println!("{:?}", package);
+                    println!(
+                        "{}",
+                        package.get_condensed(Channel::from_name(
+                            matches.value_of("channel").unwrap_or("stable")
+                        ))
+                    );
                 }
             } else {
                 println!("{}", packages[0]);

src/parse.rs

@@ -1,7 +1,6 @@
 use std::collections::HashMap;
 use std::convert::TryInto;
 use std::fmt;
-use std::fmt::Debug;
 use std::fmt::Display;
 use std::fmt::Formatter;
 use std::result::Result;
@@ -25,13 +24,11 @@ pub struct MavenPackage {
     latest_stable: Option<String>,
 }
 
-impl Debug for MavenPackage {
-    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "{}:{}:{}",
-            self.group_id, self.artifact_id, self.all_versions[0]
-        )
+impl MavenPackage {
+    pub(crate) fn get_condensed(&self, channel: Channel) -> String {
+        let mut result = String::new();
+        result.push_str(&format!("{}:{}:", self.group_id, self.artifact_id));
+        result
     }
 }