Enable "quiet mode"

src/bin/id3-image-embed.rs

@@ -9,7 +9,11 @@ use id3_image::embed_image;
 struct Opt {
     /// Verbose mode (-v, -vv, -vvv, etc.)
     #[structopt(short = "v", long = "verbose", parse(from_occurrences))]
-    verbose: u8,
+    verbose: i8,
+
+    /// Quiet mode, implies no verbosity, and also no error explanations
+    #[structopt(short = "q", long = "quiet")]
+    quiet: bool,
 
     /// Music file to embed image into
     #[structopt(name = "music-file.mp3", required = true, parse(from_os_str))]
@@ -22,15 +26,18 @@ struct Opt {
 
 fn main() {
     let opt = Opt::from_args();
+    let verbosity = if opt.quiet { -1 } else { opt.verbose };
     let music_filename = opt.music_filename;
     let image_filename = opt.image_filename.
         unwrap_or_else(|| music_filename.with_extension("jpg"));
 
     if let Err(e) = embed_image(&music_filename, &image_filename) {
+        if verbosity >= 0 {
             eprintln!("{}", e);
+        }
         process::exit(1);
     }
-    if opt.verbose >= 1 {
+    if verbosity >= 1 {
         println!("Embedded {:?} into {:?}", image_filename, music_filename);
     }
 }

src/bin/id3-image-extract.rs

@@ -9,7 +9,11 @@ use id3_image::extract_first_image;
 struct Opt {
     /// Verbose mode (-v, -vv, -vvv, etc.)
     #[structopt(short = "v", long = "verbose", parse(from_occurrences))]
-    verbose: u8,
+    verbose: i8,
+
+    /// Quiet mode, implies no verbosity, and also no error explanations
+    #[structopt(short = "q", long = "quiet")]
+    quiet: bool,
 
     /// Music file to extract image from
     #[structopt(name = "music-file.mp3", required = true, parse(from_os_str))]
@@ -22,19 +26,22 @@ struct Opt {
 
 fn main() {
     let opt = Opt::from_args();
+    let verbosity = if opt.quiet { -1 } else { opt.verbose };
 
     let image_filename = opt.image_filename.clone().
         unwrap_or_else(|| opt.music_filename.with_extension("jpg"));
 
     if let Err(e) = extract_first_image(&opt.music_filename, &image_filename) {
+        if verbosity >= 0 {
             eprintln!("{}", e);
+        }
         process::exit(1);
     }
 
-    if opt.verbose == 1 {
+    if verbosity == 1 {
         // then just print the output filename for scripting purposes:
         println!("{}", image_filename.display());
-    } else if opt.verbose >= 2 {
+    } else if verbosity >= 2 {
         // show a longer status message:
         println!("Extracted cover art from {:?} to {:?}", opt.music_filename, image_filename);
     }

src/bin/id3-image-remove.rs

@@ -10,7 +10,11 @@ use id3_image::remove_images;
 struct Opt {
     /// Verbose mode (-v, -vv, -vvv, etc.)
     #[structopt(short = "v", long = "verbose", parse(from_occurrences))]
-    verbose: u8,
+    verbose: i8,
+
+    /// Quiet mode, implies no verbosity, and also no error explanations
+    #[structopt(short = "q", long = "quiet")]
+    quiet: bool,
 
     /// Don't ask for confirmation before removing
     #[structopt(long = "no-confirm")]
@@ -23,29 +27,35 @@ struct Opt {
 
 fn main() {
     let opt = Opt::from_args();
+    let verbosity = if opt.quiet { -1 } else { opt.verbose };
+    let confirm = !opt.no_confirm;
 
-    if !opt.no_confirm {
+    if verbosity >= 0 && confirm {
         print_prompt();
         let mut input = String::new();
         while let Err(_) = io::stdin().read_line(&mut input) {
-            println!("Could not read your input, please try again.");
+            if verbosity >= 0 {
+                eprintln!("Could not read your input, please try again.");
+            }
             print_prompt();
         }
 
         let choice = input.to_lowercase().trim().chars().next().unwrap_or('y');
         if choice != 'y' {
-            if opt.verbose >= 1 {
+            if verbosity >= 1 {
                 println!("Exiting without removing images");
             }
-            process::exit(0);
+            return;
         }
     }
 
     if let Err(e) = remove_images(&opt.music_filename) {
+        if verbosity >= 0 {
             eprintln!("{}", e);
+        }
         process::exit(1);
     }
-    if opt.verbose >= 1 {
+    if verbosity >= 1 {
         println!("Removed images on {:?}", opt.music_filename);
     }
 }