Show better error messages

src/cli.rs

@@ -179,7 +179,6 @@ impl TryFrom<clap::ArgMatches<'static>> for Command {
                     output: Some(File {
                         path: output_file.into(),
                         contents_in_memory: None,
-                        // extension: output_file_extension.ok(),
                         extension: Some(output_file_extension.unwrap()),
                     }),
                 })

src/compressors/bzip.rs

@@ -36,8 +36,7 @@ impl BzipCompressor {
         let bytes = match file.contents_in_memory {
             Some(bytes) => bytes,
             None => {
-                // TODO: error message,
-                return Err(crate::Error::InvalidInput);
+                return Err(crate::Error::InternalError);
             }
         };
 

src/compressors/tar.rs

@@ -14,8 +14,8 @@ impl TarCompressor {
     // TODO: implement this
     fn make_archive_from_memory(_input: File) -> crate::Result<Vec<u8>> {
         println!(
-            "{}: .tar.tar and .zip.tar is currently unimplemented.",
-            "error".red()
+            "{} .tar.tar and .zip.tar is currently unimplemented.",
+            "[ERROR]".red()
         );
         Err(crate::Error::InvalidZipArchive(""))
     }

src/error.rs

@@ -18,6 +18,7 @@ pub enum Error {
     InputsMustHaveBeenDecompressible(PathBuf),
     InternalError,
     CompressingRootFolder,
+    WalkdirError
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
@@ -38,25 +39,33 @@ impl fmt::Debug for Error {
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{} ", "[ERROR]".red())?;
         match self {
             Error::MissingExtensionError(filename) => {
+                write!(f, "{} ", "[ERROR]".red())?;
                 write!(f, "cannot compress to \'{}\', likely because it has an unsupported (or missing) extension.", filename)
             }
             Error::InputsMustHaveBeenDecompressible(file) => {
+                write!(f, "{} ", "[ERROR]".red())?;
                 write!(f, "file '{:?}' is not decompressible", file)
             }
+            Error::WalkdirError => {                
+                // Already printed in the From block
+                write!(f, "")
+            }
             Error::FileNotFound(file) => {
+                write!(f, "{} ", "[ERROR]".red())?;
                 // TODO: check if file == ""
                 write!(f, "file {:?} not found!", file)
             }
             Error::CompressingRootFolder => {
+                write!(f, "{} ", "[ERROR]".red())?;
                 let spacing = "        ";
                 writeln!(f, "It seems you're trying to compress the root folder.")?;
                 writeln!(f, "{}This is unadvisable since ouch does compressions in-memory.", spacing)?;
                 write!(f, "{}Use a more appropriate tool for this, such as {}.", spacing, "rsync".green())
             }
             Error::InternalError => {
+                write!(f, "{} ", "[ERROR]".red())?;
                 write!(f, "You've reached an internal error! This really should not have happened.\nPlease file an issue at {}", "https://github.com/vrmiguel/ouch".green())
             }
             _err => {
@@ -74,7 +83,7 @@ impl From<std::io::Error> for Error {
             std::io::ErrorKind::PermissionDenied => Self::PermissionDenied,
             std::io::ErrorKind::AlreadyExists => Self::AlreadyExists,
             _other => {
-                println!("{}: {}", "IO error".red(), err);
+                println!("{} {}", "[IO error]".red(), err);
                 Self::IoError
             }
         }
@@ -95,7 +104,7 @@ impl From<zip::result::ZipError> for Error {
 
 impl From<walkdir::Error> for Error {
     fn from(err: walkdir::Error) -> Self {
-        eprintln!("{}: {}", "error".red(), err);
-        Self::InvalidInput
+        eprintln!("{} {}", "[ERROR]".red(), err);
+        Self::WalkdirError
     }
 }

src/evaluator.rs

@@ -29,10 +29,10 @@ impl Evaluator {
             None => {
                 // This block *should* be unreachable
                 eprintln!(
-                    "{}: reached Evaluator::get_decompressor without known extension.",
-                    "internal error".red()
+                    "{} reached Evaluator::get_decompressor without known extension.",
+                    "[internal error]".red()
                 );
-                return Err(crate::Error::InvalidInput);
+                return Err(crate::Error::InternalError);
             }
         };
 
@@ -71,8 +71,8 @@ impl Evaluator {
             None => {
                 // This block *should* be unreachable
                 eprintln!(
-                    "{}: reached Evaluator::get_decompressor without known extension.",
-                    "internal error".red()
+                    "{} reached Evaluator::get_decompressor without known extension.",
+                    "[internal error]".red()
                 );
                 return Err(crate::Error::InvalidInput);
             }

src/utils.rs

@@ -13,11 +13,6 @@ where
 {
     let exists = path.as_ref().exists();
     if !exists {
-        eprintln!(
-            "{}: could not find file {:?}",
-            "[ERROR]".red(),
-            path.as_ref()
-        );
         return Err(crate::Error::FileNotFound(PathBuf::from(path.as_ref())));
     }
     Ok(())