more specific errors for some IO errors

src/config.rs

@@ -97,7 +97,12 @@ impl Config {
                 if config_filename.is_file() {
                     Self::read_from_toml(config_filename)
                 } else {
-                    create_dir_all(project_dirs.config_dir())?;
+                    let config_dir = project_dirs.config_dir();
+
+                    create_dir_all(config_dir).map_err(|e| CouldntCreateConfigDir {
+                        path: config_dir.to_owned(),
+                        error: e.to_string(),
+                    })?;
                     Self::create_and_return_config(project_dirs.config_dir(), &config_filename)
                 }
             } else {
@@ -160,8 +165,15 @@ impl Config {
             ..Default::default()
         };
 
-        let mut config_file = File::create(config_filename)?;
-        config_file.write_all(to_string(&config).unwrap().as_bytes())?;
+        let mut config_file = File::create(config_filename).map_err(|e| CouldntEditConfigFile {
+            path: config_filename.to_owned(),
+            error: e.to_string(),
+        })?;
+
+        config_file.write_all(to_string(&config).unwrap().as_bytes()).map_err(|e| CouldntEditConfigFile {
+            path: config_filename.to_owned(),
+            error: e.to_string(),
+        })?;
 
         Ok(config)
     }

src/editor.rs

@@ -3,19 +3,19 @@ use std::io::Read;
 
 use tempfile::NamedTempFile;
 
-use crate::error::{Error, Result};
+use crate::error::{Error::*, Result};
 
 pub fn get_string(note_editor: Option<&String>) -> Result<String> {
     let note_editor = if let Some(note_editor) = note_editor {
         note_editor
     } else {
-        return Err(Error::EditorIsEmpty);
+        return Err(EditorIsEmpty);
     };
     let parts: Vec<_> = note_editor.split(" ").filter(|p| p.len() > 0).collect();
     let editor = if let Some(name) = parts.get(0) {
         name.to_owned()
     } else {
-        return Err(Error::EditorIsEmpty);
+        return Err(EditorIsEmpty);
     };
 
     let mut c = Command::new(editor);
@@ -26,7 +26,7 @@ pub fn get_string(note_editor: Option<&String>) -> Result<String> {
         }
     }
 
-    let mut tmpfile = NamedTempFile::new()?;
+    let mut tmpfile = NamedTempFile::new().map_err(|e| NoTmpFile(e.to_string()))?;
 
     c.arg(tmpfile.as_ref());
 
@@ -34,16 +34,19 @@ pub fn get_string(note_editor: Option<&String>) -> Result<String> {
         .stdin(Stdio::inherit())
         .stdout(Stdio::inherit())
         .stderr(Stdio::inherit())
-        .output()?
+        .output().map_err(|e| EditorFailed {
+            editor: note_editor.clone(),
+            error: e.to_string(),
+        })?
         .status;
 
     if status.success() {
         let mut note = String::new();
 
-        tmpfile.read_to_string(&mut note)?;
+        tmpfile.read_to_string(&mut note).map_err(|e| CouldntReadTmpFile(e.to_string()))?;
 
         Ok(note)
     } else {
-        Err(Error::EditorFailed { editor: note_editor.clone(), error: status.to_string() })
+        Err(EditorFailed { editor: note_editor.clone(), error: status.to_string() })
     }
 }

src/error.rs

@@ -108,7 +108,45 @@ t config --help for more options.")]
     EditorFailed {
         editor: String,
         error: String,
-    }
+    },
+
+    #[error("A temporary file couldn't be created for you to edit. This is very
+weird, but might have something to do with yout OS.
+
+Here's the underlaying error:
+{0}
+
+If you think this is an issue with this program report it at:
+
+https://gitlab.com/categulario/tiempo")]
+    NoTmpFile(String),
+
+    #[error("The temporary file you just created couldn't be read. This is the
+underlaying error:
+
+{0}
+
+I didn't imagine this could ever happen, but now I'm curious. Do you mind
+reporging the issue at https://gitlab.com/categulario/tiempo ?")]
+    CouldntReadTmpFile(String),
+
+    #[error("The ")]
+    CouldntCreateConfigDir {
+        path: PathBuf,
+        error: String,
+    },
+
+    #[error("A problem ocurred while trying to edit/create the config file at
+
+{path}
+
+Is there a permissions issue? Here's the underlaying error:
+
+{error}")]
+    CouldntEditConfigFile {
+        path: PathBuf,
+        error: String,
+    },
 }
 
 pub type Result<T> = result::Result<T, Error>;

src/formatters/csv.rs

@@ -3,7 +3,7 @@ use std::io::Write;
 use csv::Writer;
 use chrono::SecondsFormat;
 
-use crate::error::Result;
+use crate::error::{Result, Error::*};
 use crate::models::Entry;
 
 pub fn print_formatted<W: Write>(entries: Vec<Entry>, out: &mut W, ids: bool) -> Result<()> {
@@ -34,9 +34,7 @@ pub fn print_formatted<W: Write>(entries: Vec<Entry>, out: &mut W, ids: bool) ->
         }
     }
 
-    wtr.flush()?;
-
-    Ok(())
+    wtr.flush().map_err(|e| IOError(e))
 }
 
 #[cfg(test)]

src/old.rs

@@ -3,7 +3,7 @@ use std::io::Write;
 use chrono::{DateTime, Utc, Local, LocalResult, TimeZone};
 use ansi_term::Color::Yellow;
 
-use crate::error::{Error, Result};
+use crate::error::{Error::*, Result};
 use crate::models::Entry;
 use crate::database::{Database, DBVersion};
 
@@ -13,9 +13,9 @@ use crate::database::{Database, DBVersion};
 /// Used to convert times from the old database version.
 fn local_to_utc(t: DateTime<Utc>) -> Result<DateTime<Utc>> {
     let local_time = match Local.from_local_datetime(&t.naive_utc()) {
-        LocalResult::None => return Err(Error::NoneLocalTime(t.naive_utc().to_string())),
+        LocalResult::None => return Err(NoneLocalTime(t.naive_utc().to_string())),
         LocalResult::Single(t) => t,
-        LocalResult::Ambiguous(t1, t2) => return Err(Error::AmbiguousLocalTime {
+        LocalResult::Ambiguous(t1, t2) => return Err(AmbiguousLocalTime {
             orig: t.naive_utc().to_string(),
             t1: t1.naive_local(),
             t2: t2.naive_local(),
@@ -77,7 +77,7 @@ pub fn warn_if_needed<E: Write>(err: &mut E, needs_warning: bool) -> Result<()>
             "{} You are using the old timetrap format, it is advised that \
             you update your database using t migrate",
             Yellow.bold().paint("[WARNING]"),
-        )?;
+        ).map_err(|e| IOError(e))?;
     }
 
     Ok(())