added anyhow and thiserror; fixed clippy warnings; stopped creating switcher twice

Cargo.lock

@@ -20,6 +20,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.59"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c91f1f46651137be86f3a2b9a8359f9ab421d04d941c62b5982e1ca21113adf9"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -675,6 +681,7 @@ dependencies = [
 name = "reel-moby"
 version = "1.2.1"
 dependencies = [
+ "anyhow",
  "chrono",
  "lazy_static",
  "regex",
@@ -683,6 +690,7 @@ dependencies = [
  "serde_json",
  "structopt",
  "termion",
+ "thiserror",
  "tui",
 ]
 
@@ -921,6 +929,26 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5f6586b7f764adc0231f4c79be7b920e766bb2f3e51b3661cdb263828f19994"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12bafc5b54507e0149cdf1b145a5d80ab80a90bcd9275df43d4fff68460f6c21"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "time"
 version = "0.1.44"

Cargo.toml

@@ -16,6 +16,8 @@ termion = "1.5"
 regex = "1.5.4"
 lazy_static = "1.4.0"
 structopt = "0.3.23"
+thiserror = "1.0.32"
+anyhow = "1.0.59"
 
 [profile.release]
 lto = "yes"

src/main.rs

@@ -1,12 +1,13 @@
-use std::path::PathBuf;
-use structopt::StructOpt;
-
 mod common;
 mod repo;
 mod repository;
 mod ui;
 mod widget;
 
+use anyhow::Result;
+use std::path::PathBuf;
+use structopt::StructOpt;
+
 /// helps you searching or updating tags of your used docker images
 #[derive(StructOpt, Debug)]
 pub struct Opt {
@@ -19,8 +20,10 @@ pub struct Opt {
     repo: Option<String>,
 }
 
-fn main() {
+fn main() -> Result<()> {
     //parse parameter
     let opt = Opt::from_args();
-    ui::create_ui(&opt);
+    ui::create_ui(&opt)?;
+
+    Ok(())
 }

src/repository/dockerhub.rs

@@ -19,11 +19,11 @@ pub struct Images {
 }
 
 impl Images {
-    pub fn convert(&self) -> super::Tag {
+    pub fn from_tag(images: &Self) -> super::Tag {
         super::Tag {
-            name: self.tag_name.clone(),
-            last_updated: Some(self.last_updated.clone()),
-            details: self
+            name: images.tag_name.clone(),
+            last_updated: Some(images.last_updated.clone()),
+            details: images
                 .images
                 .iter()
                 .map(|d| super::TagDetails {
@@ -69,7 +69,7 @@ impl DockerHub {
         }
 
         Ok(super::Repo {
-            tags: tags.results.iter().map(|t| t.convert()).collect(),
+            tags: tags.results.iter().map(Images::from_tag).collect(),
             next_page: tags.next_page,
         })
     }

src/repository/mod.rs

@@ -1,32 +1,24 @@
 mod dockerhub;
 
-use std::fmt;
-
 use chrono::DateTime;
+use thiserror::Error;
 
 use crate::common::display_duration_ext::DisplayDurationExt;
 use crate::repo;
 
-#[derive(Debug, PartialEq)]
+#[derive(Debug, PartialEq, Error)]
 pub enum Error {
     /// couldn't fetch json with reqwest
+    #[error("Fetching error: {0}")]
     Fetching(String),
     /// a serde error
+    #[error("Converting error: {0}")]
     Converting(String),
     /// invalid repos show a valid json with 0 tags
+    #[error("Given Repo does not exists or has 0 tags.")]
     NoTagsFound,
 }
 
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Error::Fetching(s) => write!(f, "Fetching error: {}", s),
-            Error::Converting(s) => write!(f, "Converting error: {}", s),
-            Error::NoTagsFound => write!(f, "Given Repo has 0 tags. Is it valid?"),
-        }
-    }
-}
-
 #[derive(Clone, PartialEq)]
 pub struct TagDetails {
     pub arch: Option<String>,

src/ui/default.rs

@@ -1,17 +1,18 @@
-use std::{io, thread};
-
-use crate::Opt;
+use anyhow::Result;
 use termion::event::Key;
 use termion::raw::IntoRawMode;
 use tui::backend::TermionBackend;
 use tui::layout::{Constraint, Direction, Layout};
 use tui::Terminal;
 
+use std::{io, thread};
+
 use crate::repository;
 use crate::widget::info;
 use crate::widget::repo_entry;
 use crate::widget::service_switcher;
 use crate::widget::tag_list;
+use crate::Opt;
 
 pub struct Ui {
     state: State,
@@ -53,14 +54,14 @@ impl std::iter::Iterator for State {
 }
 
 impl Ui {
-    pub fn run(opt: &Opt) {
+    pub fn run(opt: &Opt, switcher: service_switcher::ServiceSwitcher) -> Result<()> {
         let repo_id = opt.repo.as_deref();
 
         let mut ui = Ui {
             state: State::SelectService,
             repo: repo_entry::RepoEntry::new(repo_id),
             tags: tag_list::TagList::with_status("Tags are empty"),
-            services: service_switcher::ServiceSwitcher::new(&opt.file).unwrap(),
+            services: switcher,
             details: crate::widget::details::Details::new(),
             info: info::Info::new("Select image of edit Repository"),
         };
@@ -70,9 +71,9 @@ impl Ui {
         }
 
         //setup tui
-        let stdout = io::stdout().into_raw_mode().unwrap();
+        let stdout = io::stdout().into_raw_mode()?;
         let backend = TermionBackend::new(stdout);
-        let mut terminal = Terminal::new(backend).unwrap();
+        let mut terminal = Terminal::new(backend)?;
 
         //setup input thread
         let receiver = super::spawn_stdin_channel();
@@ -80,8 +81,7 @@ impl Ui {
         //core interaction loop
         'core: loop {
             //draw
-            terminal
-                .draw(|rect| {
+            terminal.draw(|rect| {
                 let chunks = Layout::default()
                     .direction(Direction::Vertical)
                     .constraints(
@@ -106,8 +106,7 @@ impl Ui {
                 rect.render_stateful_widget(list, more_chunks[0], state);
                 rect.render_widget(ui.details.render(), more_chunks[1]);
                 rect.render_widget(ui.info.render(), chunks[3]);
-                })
-                .unwrap();
+            })?;
 
             //handle input
             match receiver.try_recv() {
@@ -219,6 +218,8 @@ impl Ui {
             thread::sleep(std::time::Duration::from_millis(32));
         }
 
-        terminal.clear().unwrap();
+        terminal.clear()?;
+
+        Ok(())
     }
 }

src/ui/mod.rs

@@ -1,20 +1,23 @@
 mod default;
 mod no_yaml;
 
+use anyhow::Result;
+use termion::input::TermRead;
+
+use crate::widget::service_switcher;
+use crate::Opt;
+
 use std::sync::mpsc;
 use std::{io, thread};
 
-use crate::Opt;
-use termion::input::TermRead;
-
-use crate::widget::service_switcher;
-
-pub fn create_ui(opt: &Opt) {
+pub fn create_ui(opt: &Opt) -> Result<()> {
     let service_result = service_switcher::ServiceSwitcher::new(&opt.file);
     match service_result {
         None => no_yaml::NoYaml::run(opt),
-        Some(_) => default::Ui::run(opt),
-    }
+        Some(switcher) => default::Ui::run(opt, switcher),
+    }?;
+
+    Ok(())
 }
 
 /// create a thread for catching input and send them to core loop

src/ui/no_yaml.rs

@@ -1,11 +1,12 @@
-use std::{io, thread};
-
+use anyhow::Result;
 use termion::event::Key;
 use termion::raw::IntoRawMode;
 use tui::backend::TermionBackend;
 use tui::layout::{Constraint, Direction, Layout};
 use tui::Terminal;
 
+use std::{io, thread};
+
 use crate::widget::details;
 use crate::widget::info;
 use crate::widget::repo_entry;
@@ -48,7 +49,7 @@ pub struct NoYaml {
 }
 
 impl NoYaml {
-    pub fn run(opt: &Opt) {
+    pub fn run(opt: &Opt) -> Result<()> {
         let repo_id = opt.repo.as_deref();
 
         let mut ui = NoYaml {
@@ -65,9 +66,9 @@ impl NoYaml {
         }
 
         //setup tui
-        let stdout = io::stdout().into_raw_mode().unwrap();
+        let stdout = io::stdout().into_raw_mode()?;
         let backend = TermionBackend::new(stdout);
-        let mut terminal = Terminal::new(backend).unwrap();
+        let mut terminal = Terminal::new(backend)?;
 
         //setup input thread
         let receiver = super::spawn_stdin_channel();
@@ -75,8 +76,7 @@ impl NoYaml {
         //core interaction loop
         'core: loop {
             //draw
-            terminal
-                .draw(|rect| {
+            terminal.draw(|rect| {
                 let chunks = Layout::default()
                     .direction(Direction::Vertical)
                     .constraints(
@@ -98,8 +98,7 @@ impl NoYaml {
                 rect.render_stateful_widget(list, more_chunks[0], state);
                 rect.render_widget(ui.details.render(), more_chunks[1]);
                 rect.render_widget(ui.info.render(), chunks[2]);
-                })
-                .unwrap();
+            })?;
 
             //handle input
             match receiver.try_recv() {
@@ -156,6 +155,7 @@ impl NoYaml {
             thread::sleep(std::time::Duration::from_millis(32));
         }
 
-        terminal.clear().unwrap();
+        terminal.clear()?;
+        Ok(())
     }
 }