Clippy fixes

build.rs

@@ -37,14 +37,9 @@ fn main() {
     ]);
     #[cfg(feature = "cli-docs")]
     {
-        use flate2::Compression;
-        use flate2::GzBuilder;
+        use flate2::{Compression, GzBuilder};
         const MANDOC_OPTS: &[&str] = &["-T", "utf8", "-I", "os=Generated by mandoc(1)"];
-        use std::env;
-        use std::fs::File;
-        use std::io::prelude::*;
-        use std::path::Path;
-        use std::process::Command;
+        use std::{env, fs::File, io::prelude::*, path::Path, process::Command};
 
         let out_dir = env::var("OUT_DIR").unwrap();
         let mut out_dir_path = Path::new(&out_dir).to_path_buf();
@@ -57,7 +52,8 @@ fn main() {
                 .output()
                 .or_else(|_| Command::new("man").arg("-l").arg(filepath).output())
                 .expect(
-                    "could not execute `mandoc` or `man`. If the binaries are not available in the PATH, disable `cli-docs` feature to be able to continue compilation.",
+                    "could not execute `mandoc` or `man`. If the binaries are not available in \
+                     the PATH, disable `cli-docs` feature to be able to continue compilation.",
                 );
 
             let file = File::create(&out_dir_path).unwrap_or_else(|err| {

config_macros.rs

@@ -19,9 +19,11 @@
  * along with meli. If not, see <http://www.gnu.org/licenses/>.
  */
 
-use std::fs::File;
-use std::io::prelude::*;
-use std::process::{Command, Stdio};
+use std::{
+    fs::File,
+    io::prelude::*,
+    process::{Command, Stdio},
+};
 
 use quote::{format_ident, quote};
 
@@ -29,7 +31,8 @@ use quote::{format_ident, quote};
 pub fn override_derive(filenames: &[(&str, &str)]) {
     let mut output_file =
         File::create("src/conf/overrides.rs").expect("Unable to open output file");
-    let mut output_string = r##"/*
+    let mut output_string = r##"// @generated
+/*
  * meli - conf/overrides.rs
  *
  * Copyright 2020 Manos Pitsidianakis
@@ -60,7 +63,7 @@ use super::*;
 
     'file_loop: for (filename, ident) in filenames {
         println!("cargo:rerun-if-changed={}", filename);
-        let mut file = File::open(&filename)
+        let mut file = File::open(filename)
             .unwrap_or_else(|err| panic!("Unable to open file `{}` {}", filename, err));
 
         let mut src = String::new();

melib/build.rs

@@ -29,11 +29,12 @@ fn main() -> Result<(), std::io::Error> {
         println!("cargo:rerun-if-changed=build.rs");
         println!("cargo:rerun-if-changed={}", MOD_PATH);
         /* Line break tables */
-        use std::fs::File;
-        use std::io::prelude::*;
-        use std::io::BufReader;
-        use std::path::Path;
-        use std::process::{Command, Stdio};
+        use std::{
+            fs::File,
+            io::{prelude::*, BufReader},
+            path::Path,
+            process::{Command, Stdio},
+        };
         const LINE_BREAK_TABLE_URL: &str =
             "http://www.unicode.org/Public/UCD/latest/ucd/LineBreak.txt";
         /* Grapheme width tables */
@@ -52,7 +53,7 @@ fn main() -> Result<(), std::io::Error> {
             std::process::exit(0);
         }
         let mut child = Command::new("curl")
-            .args(&["-o", "-", LINE_BREAK_TABLE_URL])
+            .args(["-o", "-", LINE_BREAK_TABLE_URL])
             .stdout(Stdio::piped())
             .stdin(Stdio::null())
             .stderr(Stdio::inherit())
@@ -69,7 +70,8 @@ fn main() -> Result<(), std::io::Error> {
             let tokens: &str = line.split_whitespace().next().unwrap();
 
             let semicolon_idx: usize = tokens.chars().position(|c| c == ';').unwrap();
-            /* LineBreak.txt list is ascii encoded so we can assume each char takes one byte: */
+            /* LineBreak.txt list is ascii encoded so we can assume each char takes one
+             * byte: */
             let chars_str: &str = &tokens[..semicolon_idx];
 
             let mut codepoint_iter = chars_str.split("..");
@@ -87,21 +89,21 @@ fn main() -> Result<(), std::io::Error> {
         child.wait()?;
 
         let child = Command::new("curl")
-            .args(&["-o", "-", UNICODE_DATA_URL])
+            .args(["-o", "-", UNICODE_DATA_URL])
             .stdout(Stdio::piped())
             .output()?;
 
         let unicode_data = String::from_utf8_lossy(&child.stdout);
 
         let child = Command::new("curl")
-            .args(&["-o", "-", EAW_URL])
+            .args(["-o", "-", EAW_URL])
             .stdout(Stdio::piped())
             .output()?;
 
         let eaw_data = String::from_utf8_lossy(&child.stdout);
 
         let child = Command::new("curl")
-            .args(&["-o", "-", EMOJI_DATA_URL])
+            .args(["-o", "-", EMOJI_DATA_URL])
             .stdout(Stdio::piped())
             .output()?;
 
@@ -198,13 +200,13 @@ fn main() -> Result<(), std::io::Error> {
             }
             // Apply the following special cases:
             //  - The unassigned code points in the following blocks default to "W":
-            //         CJK Unified Ideographs Extension A: U+3400..U+4DBF
-            //         CJK Unified Ideographs:             U+4E00..U+9FFF
-            //         CJK Compatibility Ideographs:       U+F900..U+FAFF
-            //  - All undesignated code points in Planes 2 and 3, whether inside or
-            //      outside of allocated blocks, default to "W":
-            //         Plane 2:                            U+20000..U+2FFFD
-            //         Plane 3:                            U+30000..U+3FFFD
+            //         - CJK Unified Ideographs Extension A: U+3400..U+4DBF
+            //         - CJK Unified Ideographs:             U+4E00..U+9FFF
+            //         - CJK Compatibility Ideographs:       U+F900..U+FAFF
+            //  - All undesignated code points in Planes 2 and 3, whether inside or outside
+            //    of allocated blocks, default to "W":
+            //         - Plane 2:                            U+20000..U+2FFFD
+            //         - Plane 3:                            U+30000..U+3FFFD
             const WIDE_RANGES: [(usize, usize); 5] = [
                 (0x3400, 0x4DBF),
                 (0x4E00, 0x9FFF),
@@ -245,12 +247,12 @@ fn main() -> Result<(), std::io::Error> {
                 }
 
                 use std::str::FromStr;
-                let mut v = comment.trim().split_whitespace().next().unwrap();
+                let mut v = comment.split_whitespace().next().unwrap();
                 if v.starts_with('E') {
                     v = &v[1..];
                 }
                 if v.as_bytes()
-                    .get(0)
+                    .first()
                     .map(|c| !c.is_ascii_digit())
                     .unwrap_or(true)
                 {
@@ -325,7 +327,7 @@ fn main() -> Result<(), std::io::Error> {
             }
         }
 
-        let mut file = File::create(&mod_path)?;
+        let mut file = File::create(mod_path)?;
         file.write_all(
             br#"/*
  * meli - text_processing crate.

melib/src/addressbook.rs

@@ -24,12 +24,14 @@ pub mod vcard;
 
 pub mod mutt;
 
-use crate::datetime::{self, UnixTimestamp};
-use crate::parsec::Parser;
-use std::collections::HashMap;
+use std::{collections::HashMap, ops::Deref};
+
 use uuid::Uuid;
 
-use std::ops::Deref;
+use crate::{
+    datetime::{self, UnixTimestamp},
+    parsec::Parser,
+};
 
 #[derive(Hash, Debug, PartialEq, Eq, Clone, Copy, Deserialize, Serialize)]
 #[serde(from = "String")]
@@ -85,7 +87,8 @@ pub struct Card {
     last_edited: UnixTimestamp,
     extra_properties: HashMap<String, String>,
 
-    /// If true, we can't make any changes because we do not manage this resource.
+    /// If true, we can't make any changes because we do not manage this
+    /// resource.
     external_resource: bool,
 }
 

melib/src/addressbook/mutt.rs

@@ -20,11 +20,11 @@
  */
 
 //! # Mutt contact formats
-//!
+
+use std::collections::VecDeque;
 
 use super::*;
 use crate::parsec::{is_not, map_res, match_literal_anycase, prefix, Parser};
-use std::collections::VecDeque;
 
 //alias <nickname> [ <long name> ] <address>
 // From mutt doc:

melib/src/addressbook/vcard.rs

@@ -27,11 +27,13 @@
 //! - Version 4 [RFC 6350: vCard Format Specification](https://datatracker.ietf.org/doc/rfc6350/)
 //! - Parameter escaping [RFC 6868 Parameter Value Encoding in iCalendar and vCard](https://datatracker.ietf.org/doc/rfc6868/)
 
+use std::{collections::HashMap, convert::TryInto};
+
 use super::*;
-use crate::error::{Error, Result};
-use crate::parsec::{match_literal_anycase, one_or_more, peek, prefix, take_until, Parser};
-use std::collections::HashMap;
-use std::convert::TryInto;
+use crate::{
+    error::{Error, Result},
+    parsec::{match_literal_anycase, one_or_more, peek, prefix, take_until, Parser},
+};
 
 /* Supported vcard versions */
 pub trait VCardVersion: core::fmt::Debug {}
@@ -86,7 +88,11 @@ impl CardDeserializer {
         input = if (!input.starts_with(HEADER_CRLF) || !input.ends_with(FOOTER_CRLF))
             && (!input.starts_with(HEADER_LF) || !input.ends_with(FOOTER_LF))
         {
-            return Err(Error::new(format!("Error while parsing vcard: input does not start or end with correct header and footer. input is:\n{:?}", input)));
+            return Err(Error::new(format!(
+                "Error while parsing vcard: input does not start or end with correct header and \
+                 footer. input is:\n{:?}",
+                input
+            )));
         } else if input.starts_with(HEADER_CRLF) {
             &input[HEADER_CRLF.len()..input.len() - FOOTER_CRLF.len()]
         } else {

melib/src/backends.rs

@@ -36,35 +36,41 @@ pub mod jmap;
 pub mod maildir;
 #[cfg(feature = "mbox_backend")]
 pub mod mbox;
+use std::{
+    any::Any,
+    borrow::Cow,
+    collections::{BTreeSet, HashMap},
+    fmt,
+    fmt::Debug,
+    future::Future,
+    ops::Deref,
+    pin::Pin,
+    sync::{Arc, RwLock},
+};
+
+use futures::stream::Stream;
+
 #[cfg(feature = "imap_backend")]
 pub use self::imap::ImapType;
-#[cfg(feature = "imap_backend")]
-pub use self::nntp::NntpType;
-use crate::conf::AccountSettings;
-use crate::error::{Error, ErrorKind, Result};
-
 #[cfg(feature = "maildir_backend")]
 use self::maildir::MaildirType;
 #[cfg(feature = "mbox_backend")]
 use self::mbox::MboxType;
+#[cfg(feature = "imap_backend")]
+pub use self::nntp::NntpType;
 use super::email::{Envelope, EnvelopeHash, Flag};
-use futures::stream::Stream;
-use std::any::Any;
-use std::borrow::Cow;
-use std::collections::BTreeSet;
-use std::collections::HashMap;
-use std::fmt;
-use std::fmt::Debug;
-use std::future::Future;
-use std::ops::Deref;
-use std::pin::Pin;
-use std::sync::{Arc, RwLock};
+use crate::{
+    conf::AccountSettings,
+    error::{Error, ErrorKind, Result},
+};
 
 #[macro_export]
 macro_rules! get_path_hash {
     ($path:expr) => {{
-        use std::collections::hash_map::DefaultHasher;
-        use std::hash::{Hash, Hasher};
+        use std::{
+            collections::hash_map::DefaultHasher,
+            hash::{Hash, Hasher},
+        };
         let mut hasher = DefaultHasher::new();
         $path.hash(&mut hasher);
         hasher.finish()
@@ -97,10 +103,13 @@ impl Default for Backends {
 }
 
 #[cfg(feature = "notmuch_backend")]
-pub const NOTMUCH_ERROR_MSG: &str =
-    "libnotmuch5 was not found in your system. Make sure it is installed and in the library paths. For a custom file path, use `library_file_path` setting in your notmuch account.\n";
+pub const NOTMUCH_ERROR_MSG: &str = "libnotmuch5 was not found in your system. Make sure it is \
+                                     installed and in the library paths. For a custom file path, \
+                                     use `library_file_path` setting in your notmuch account.\n";
 #[cfg(not(feature = "notmuch_backend"))]
-pub const NOTMUCH_ERROR_MSG: &str = "this version of meli is not compiled with notmuch support. Use an appropriate version and make sure libnotmuch5 is installed and in the library paths.\n";
+pub const NOTMUCH_ERROR_MSG: &str = "this version of meli is not compiled with notmuch support. \
+                                     Use an appropriate version and make sure libnotmuch5 is \
+                                     installed and in the library paths.\n";
 
 #[cfg(not(feature = "notmuch_backend"))]
 pub const NOTMUCH_ERROR_DETAILS: &str = "";
@@ -432,13 +441,14 @@ pub trait MailBackend: ::std::fmt::Debug + Send + Sync {
     }
 }
 
-/// A `BackendOp` manages common operations for the various mail backends. They only live for the
-/// duration of the operation. They are generated by the `operation` method of `Mailbackend` trait.
+/// A `BackendOp` manages common operations for the various mail backends. They
+/// only live for the duration of the operation. They are generated by the
+/// `operation` method of `Mailbackend` trait.
 ///
 /// # Motivation
 ///
-/// We need a way to do various operations on individual mails regardless of what backend they come
-/// from (eg local or imap).
+/// We need a way to do various operations on individual mails regardless of
+/// what backend they come from (eg local or imap).
 ///
 /// # Creation
 /// ```ignore
@@ -474,8 +484,8 @@ pub trait BackendOp: ::std::fmt::Debug + ::std::marker::Send {
 
 /// Wrapper for BackendOps that are to be set read-only.
 ///
-/// Warning: Backend implementations may still cause side-effects (for example IMAP can set the
-/// Seen flag when fetching an envelope)
+/// Warning: Backend implementations may still cause side-effects (for example
+/// IMAP can set the Seen flag when fetching an envelope)
 #[derive(Debug)]
 pub struct ReadOnlyOp {
     op: Box<dyn BackendOp>,

melib/src/backends/imap.rs

@@ -36,26 +36,29 @@ use cache::{ImapCacheReset, ModSequence};
 pub mod managesieve;
 mod untagged;
 
-use crate::backends::{
-    RefreshEventKind::{self, *},
-    *,
+use std::{
+    collections::{hash_map::DefaultHasher, BTreeSet, HashMap, HashSet},
+    convert::TryFrom,
+    hash::Hasher,
+    pin::Pin,
+    str::FromStr,
+    sync::{Arc, Mutex},
+    time::{Duration, SystemTime},
 };
 
-use crate::collection::Collection;
-use crate::conf::AccountSettings;
-use crate::connections::timeout;
-use crate::email::{parser::BytesExt, *};
-use crate::error::{Error, Result, ResultIntoError};
-use futures::lock::Mutex as FutureMutex;
-use futures::stream::Stream;
-use std::collections::hash_map::DefaultHasher;
-use std::collections::{BTreeSet, HashMap, HashSet};
-use std::convert::TryFrom;
-use std::hash::Hasher;
-use std::pin::Pin;
-use std::str::FromStr;
-use std::sync::{Arc, Mutex};
-use std::time::{Duration, SystemTime};
+use futures::{lock::Mutex as FutureMutex, stream::Stream};
+
+use crate::{
+    backends::{
+        RefreshEventKind::{self, *},
+        *,
+    },
+    collection::Collection,
+    conf::AccountSettings,
+    connections::timeout,
+    email::{parser::BytesExt, *},
+    error::{Error, Result, ResultIntoError},
+};
 
 pub type ImapNum = usize;
 pub type UID = ImapNum;
@@ -340,7 +343,8 @@ impl MailBackend for ImapType {
             cache_handle,
         };
 
-        /* do this in a closure to prevent recursion limit error in async_stream macro */
+        /* do this in a closure to prevent recursion limit error in async_stream
+         * macro */
         let prepare_cl = |f: &ImapMailbox| {
             f.set_warm(true);
             if let Ok(mut exists) = f.exists.lock() {
@@ -526,15 +530,15 @@ impl MailBackend for ImapType {
     }
 
     fn operation(&self, hash: EnvelopeHash) -> Result<Box<dyn BackendOp>> {
-        let (uid, mailbox_hash) = if let Some(v) =
-            self.uid_store.hash_index.lock().unwrap().get(&hash)
-        {
-            *v
-        } else {
-            return Err(Error::new(
-                    "Message not found in local cache, it might have been deleted before you requested it."
+        let (uid, mailbox_hash) =
+            if let Some(v) = self.uid_store.hash_index.lock().unwrap().get(&hash) {
+                *v
+            } else {
+                return Err(Error::new(
+                    "Message not found in local cache, it might have been deleted before you \
+                     requested it.",
                 ));
-        };
+            };
         Ok(Box::new(ImapOp::new(
             uid,
             mailbox_hash,
@@ -749,8 +753,20 @@ impl MailBackend for ImapType {
                                 cmd.push_str("\\Draft ");
                             }
                             Ok(_) => {
-                                crate::log(format!("Application error: more than one flag bit set in set_flags: {:?}", flags), crate::ERROR);
-                                return Err(Error::new(format!("Application error: more than one flag bit set in set_flags: {:?}", flags)).set_kind(crate::ErrorKind::Bug));
+                                crate::log(
+                                    format!(
+                                        "Application error: more than one flag bit set in \
+                                         set_flags: {:?}",
+                                        flags
+                                    ),
+                                    crate::ERROR,
+                                );
+                                return Err(Error::new(format!(
+                                    "Application error: more than one flag bit set in set_flags: \
+                                     {:?}",
+                                    flags
+                                ))
+                                .set_kind(crate::ErrorKind::Bug));
                             }
                             Err(tag) => {
                                 let hash = TagHash::from_bytes(tag.as_bytes());
@@ -812,13 +828,17 @@ impl MailBackend for ImapType {
                             Ok(_) => {
                                 crate::log(
                                     format!(
-                        "Application error: more than one flag bit set in set_flags: {:?}", flags
-                    ),
+                                        "Application error: more than one flag bit set in \
+                                         set_flags: {:?}",
+                                        flags
+                                    ),
                                     crate::ERROR,
                                 );
                                 return Err(Error::new(format!(
-                        "Application error: more than one flag bit set in set_flags: {:?}", flags
-                    )));
+                                    "Application error: more than one flag bit set in set_flags: \
+                                     {:?}",
+                                    flags
+                                )));
                             }
                             Err(tag) => {
                                 cmd.push_str(tag);
@@ -892,16 +912,17 @@ impl MailBackend for ImapType {
         Ok(Box::pin(async move {
             /* Must transform path to something the IMAP server will accept
              *
-             * Each root mailbox has a hierarchy delimeter reported by the LIST entry. All paths
-             * must use this delimeter to indicate children of this mailbox.
+             * Each root mailbox has a hierarchy delimeter reported by the LIST entry.
+             * All paths must use this delimeter to indicate children of this
+             * mailbox.
              *
-             * A new root mailbox should have the default delimeter, which can be found out by issuing
-             * an empty LIST command as described in RFC3501:
+             * A new root mailbox should have the default delimeter, which can be found
+             * out by issuing an empty LIST command as described in RFC3501:
              * C: A101 LIST "" ""
              * S: * LIST (\Noselect) "/" ""
              *
-             * The default delimiter for us is '/' just like UNIX paths. I apologise if this
-             * decision is unpleasant for you.
+             * The default delimiter for us is '/' just like UNIX paths. I apologise if
+             * this decision is unpleasant for you.
              */
 
             {
@@ -924,8 +945,8 @@ impl MailBackend for ImapType {
                     }
                 }
 
-                /* FIXME  Do not try to CREATE a sub-mailbox in a mailbox that has the \Noinferiors
-                 * flag set. */
+                /* FIXME  Do not try to CREATE a sub-mailbox in a mailbox
+                 * that has the \Noinferiors flag set. */
             }
 
             let mut response = Vec::with_capacity(8 * 1024);
@@ -950,7 +971,17 @@ impl MailBackend for ImapType {
             ret?;
             let new_hash = MailboxHash::from_bytes(path.as_str().as_bytes());
             uid_store.mailboxes.lock().await.clear();
-            Ok((new_hash, new_mailbox_fut?.await.map_err(|err| Error::new(format!("Mailbox create was succesful (returned `{}`) but listing mailboxes afterwards returned `{}`", String::from_utf8_lossy(&response), err)))?))
+            Ok((
+                new_hash,
+                new_mailbox_fut?.await.map_err(|err| {
+                    Error::new(format!(
+                        "Mailbox create was succesful (returned `{}`) but listing mailboxes \
+                         afterwards returned `{}`",
+                        String::from_utf8_lossy(&response),
+                        err
+                    ))
+                })?,
+            ))
         }))
     }
 
@@ -970,7 +1001,12 @@ impl MailBackend for ImapType {
                 imap_path = mailboxes[&mailbox_hash].imap_path().to_string();
                 let permissions = mailboxes[&mailbox_hash].permissions();
                 if !permissions.delete_mailbox {
-                    return Err(Error::new(format!("You do not have permission to delete `{}`. Set permissions for this mailbox are {}", mailboxes[&mailbox_hash].name(), permissions)));
+                    return Err(Error::new(format!(
+                        "You do not have permission to delete `{}`. Set permissions for this \
+                         mailbox are {}",
+                        mailboxes[&mailbox_hash].name(),
+                        permissions
+                    )));
                 }
             }
             let mut response = Vec::with_capacity(8 * 1024);
@@ -998,7 +1034,15 @@ impl MailBackend for ImapType {
             let ret: Result<()> = ImapResponse::try_from(response.as_slice())?.into();
             ret?;
             uid_store.mailboxes.lock().await.clear();
-            new_mailbox_fut?.await.map_err(|err| format!("Mailbox delete was succesful (returned `{}`) but listing mailboxes afterwards returned `{}`", String::from_utf8_lossy(&response), err).into())
+            new_mailbox_fut?.await.map_err(|err| {
+                format!(
+                    "Mailbox delete was succesful (returned `{}`) but listing mailboxes \
+                     afterwards returned `{}`",
+                    String::from_utf8_lossy(&response),
+                    err
+                )
+                .into()
+            })
         }))
     }
 
@@ -1064,7 +1108,12 @@ impl MailBackend for ImapType {
                 let mailboxes = uid_store.mailboxes.lock().await;
                 let permissions = mailboxes[&mailbox_hash].permissions();
                 if !permissions.delete_mailbox {
-                    return Err(Error::new(format!("You do not have permission to rename mailbox `{}` (rename is equivalent to delete + create). Set permissions for this mailbox are {}", mailboxes[&mailbox_hash].name(), permissions)));
+                    return Err(Error::new(format!(
+                        "You do not have permission to rename mailbox `{}` (rename is equivalent \
+                         to delete + create). Set permissions for this mailbox are {}",
+                        mailboxes[&mailbox_hash].name(),
+                        permissions
+                    )));
                 }
                 if mailboxes[&mailbox_hash].separator != b'/' {
                     new_path = new_path.replace(
@@ -1089,7 +1138,14 @@ impl MailBackend for ImapType {
             let ret: Result<()> = ImapResponse::try_from(response.as_slice())?.into();
             ret?;
             uid_store.mailboxes.lock().await.clear();
-            new_mailbox_fut?.await.map_err(|err| format!("Mailbox rename was succesful (returned `{}`) but listing mailboxes afterwards returned `{}`", String::from_utf8_lossy(&response), err))?;
+            new_mailbox_fut?.await.map_err(|err| {
+                format!(
+                    "Mailbox rename was succesful (returned `{}`) but listing mailboxes \
+                     afterwards returned `{}`",
+                    String::from_utf8_lossy(&response),
+                    err
+                )
+            })?;
             Ok(BackendMailbox::clone(
                 &uid_store.mailboxes.lock().await[&new_hash],
             ))
@@ -1107,7 +1163,12 @@ impl MailBackend for ImapType {
             let mailboxes = uid_store.mailboxes.lock().await;
             let permissions = mailboxes[&mailbox_hash].permissions();
             if !permissions.change_permissions {
-                return Err(Error::new(format!("You do not have permission to change permissions for mailbox `{}`. Set permissions for this mailbox are {}", mailboxes[&mailbox_hash].name(), permissions)));
+                return Err(Error::new(format!(
+                    "You do not have permission to change permissions for mailbox `{}`. Set \
+                     permissions for this mailbox are {}",
+                    mailboxes[&mailbox_hash].name(),
+                    permissions
+                )));
             }
 
             Err(Error::new("Unimplemented."))
@@ -1262,7 +1323,8 @@ impl ImapType {
 
         if use_oauth2 && !s.extra.contains_key("server_password_command") {
             return Err(Error::new(format!(
-                "({}) `use_oauth2` use requires `server_password_command` set with a command that returns an OAUTH2 token. Consult documentation for guidance.",
+                "({}) `use_oauth2` use requires `server_password_command` set with a command that \
+                 returns an OAUTH2 token. Consult documentation for guidance.",
                 s.name,
             )));
         }
@@ -1524,14 +1586,16 @@ impl ImapType {
         if !s.extra.contains_key("server_password_command") {
             if use_oauth2 {
                 return Err(Error::new(format!(
-                    "({}) `use_oauth2` use requires `server_password_command` set with a command that returns an OAUTH2 token. Consult documentation for guidance.",
+                    "({}) `use_oauth2` use requires `server_password_command` set with a command \
+                     that returns an OAUTH2 token. Consult documentation for guidance.",
                     s.name,
                 )));
             }
             get_conf_val!(s["server_password"])?;
         } else if s.extra.contains_key("server_password") {
             return Err(Error::new(format!(
-                "Configuration error ({}): both server_password and server_password_command are set, cannot choose",
+                "Configuration error ({}): both server_password and server_password_command are \
+                 set, cannot choose",
                 s.name.as_str(),
             )));
         }
@@ -1541,7 +1605,8 @@ impl ImapType {
         let use_starttls = get_conf_val!(s["use_starttls"], false)?;
         if !use_tls && use_starttls {
             return Err(Error::new(format!(
-                "Configuration error ({}): incompatible use_tls and use_starttls values: use_tls = false, use_starttls = true",
+                "Configuration error ({}): incompatible use_tls and use_starttls values: use_tls \
+                 = false, use_starttls = true",
                 s.name.as_str(),
             )));
         }
@@ -1565,7 +1630,8 @@ impl ImapType {
         #[cfg(not(feature = "deflate_compression"))]
         if s.extra.contains_key("use_deflate") {
             return Err(Error::new(format!(
-                "Configuration error ({}): setting `use_deflate` is set but this version of meli isn't compiled with DEFLATE support.",
+                "Configuration error ({}): setting `use_deflate` is set but this version of meli \
+                 isn't compiled with DEFLATE support.",
                 s.name.as_str(),
             )));
         }
@@ -1578,8 +1644,10 @@ impl ImapType {
         let diff = extra_keys.difference(&keys).collect::<Vec<&&str>>();
         if !diff.is_empty() {
             return Err(Error::new(format!(
-                "Configuration error ({}): the following flags are set but are not recognized: {:?}.",
-                s.name.as_str(), diff
+                "Configuration error ({}): the following flags are set but are not recognized: \
+                 {:?}.",
+                s.name.as_str(),
+                diff
             )));
         }
         Ok(())
@@ -1658,7 +1726,14 @@ async fn fetch_hlpr(state: &mut FetchState) -> Result<Vec<Envelope>> {
                         /* Try resetting the database */
                         if let Some(ref mut cache_handle) = state.cache_handle {
                             if let Err(err) = cache_handle.reset() {
-                                crate::log(format!("IMAP cache error: could not reset cache for {}. Reason: {}", state.uid_store.account_name, err), crate::ERROR);
+                                crate::log(
+                                    format!(
+                                        "IMAP cache error: could not reset cache for {}. Reason: \
+                                         {}",
+                                        state.uid_store.account_name, err
+                                    ),
+                                    crate::ERROR,
+                                );
                             }
                         }
                         state.stage = FetchStage::InitialFresh;
@@ -1743,11 +1818,14 @@ async fn fetch_hlpr(state: &mut FetchState) -> Result<Vec<Envelope>> {
                 if max_uid_left > 0 {
                     debug!("{} max_uid_left= {}", mailbox_hash, max_uid_left);
                     let command = if max_uid_left == 1 {
-                        "UID FETCH 1 (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS (REFERENCES)] BODYSTRUCTURE)".to_string()
+                        "UID FETCH 1 (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS (REFERENCES)] \
+                         BODYSTRUCTURE)"
+                            .to_string()
                     } else {
                         format!(
-                            "UID FETCH {}:{} (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS (REFERENCES)] BODYSTRUCTURE)",
-                                std::cmp::max(max_uid_left.saturating_sub(chunk_size), 1),
+                            "UID FETCH {}:{} (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS \
+                             (REFERENCES)] BODYSTRUCTURE)",
+                            std::cmp::max(max_uid_left.saturating_sub(chunk_size), 1),
                             max_uid_left
                         )
                     };

melib/src/backends/imap/cache.rs

@@ -21,12 +21,13 @@
 
 use super::*;
 mod sync;
+use std::convert::TryFrom;
+
 use crate::{
     backends::MailboxHash,
     email::{Envelope, EnvelopeHash},
     error::*,
 };
-use std::convert::TryFrom;
 
 #[derive(Debug, PartialEq, Hash, Eq, Ord, PartialOrd, Copy, Clone)]
 pub struct ModSequence(pub std::num::NonZeroU64);
@@ -105,10 +106,11 @@ pub use sqlite3_m::*;
 #[cfg(feature = "sqlite3")]
 mod sqlite3_m {
     use super::*;
-    use crate::sqlite3::rusqlite::types::{
-        FromSql, FromSqlError, FromSqlResult, ToSql, ToSqlOutput,
+    use crate::sqlite3::{
+        self,
+        rusqlite::types::{FromSql, FromSqlError, FromSqlResult, ToSql, ToSqlOutput},
+        DatabaseDescription,
     };
-    use crate::sqlite3::{self, DatabaseDescription};
 
     type Sqlite3UID = i32;
 
@@ -287,23 +289,45 @@ mod sqlite3_m {
                 })?;
 
             if let Some(Ok(highestmodseq)) = select_response.highestmodseq {
-                self.connection.execute(
-                "INSERT OR IGNORE INTO mailbox (uidvalidity, flags, highestmodseq, mailbox_hash) VALUES (?1, ?2, ?3, ?4)",
-                sqlite3::params![select_response.uidvalidity as Sqlite3UID, select_response.flags.1.iter().map(|s| s.as_str()).collect::<Vec<&str>>().join("\0").as_bytes(), highestmodseq, mailbox_hash],
-            )
-            .chain_err_summary(|| {
-                format!(
-                    "Could not insert uidvalidity {} in header_cache of account {}",
-                    select_response.uidvalidity, self.uid_store.account_name
-                )
-            })?;
+                self.connection
+                    .execute(
+                        "INSERT OR IGNORE INTO mailbox (uidvalidity, flags, highestmodseq, \
+                         mailbox_hash) VALUES (?1, ?2, ?3, ?4)",
+                        sqlite3::params![
+                            select_response.uidvalidity as Sqlite3UID,
+                            select_response
+                                .flags
+                                .1
+                                .iter()
+                                .map(|s| s.as_str())
+                                .collect::<Vec<&str>>()
+                                .join("\0")
+                                .as_bytes(),
+                            highestmodseq,
+                            mailbox_hash
+                        ],
+                    )
+                    .chain_err_summary(|| {
+                        format!(
+                            "Could not insert uidvalidity {} in header_cache of account {}",
+                            select_response.uidvalidity, self.uid_store.account_name
+                        )
+                    })?;
             } else {
                 self.connection
                     .execute(
-                        "INSERT OR IGNORE INTO mailbox (uidvalidity, flags, mailbox_hash) VALUES (?1, ?2, ?3)",
+                        "INSERT OR IGNORE INTO mailbox (uidvalidity, flags, mailbox_hash) VALUES \
+                         (?1, ?2, ?3)",
                         sqlite3::params![
                             select_response.uidvalidity as Sqlite3UID,
-                            select_response.flags.1.iter().map(|s| s.as_str()).collect::<Vec<&str>>().join("\0").as_bytes(),
+                            select_response
+                                .flags
+                                .1
+                                .iter()
+                                .map(|s| s.as_str())
+                                .collect::<Vec<&str>>()
+                                .join("\0")
+                                .as_bytes(),
                             mailbox_hash
                         ],
                     )
@@ -463,9 +487,24 @@ mod sqlite3_m {
                 {
                     max_uid = std::cmp::max(max_uid, *uid);
                     tx.execute(
-                "INSERT OR REPLACE INTO envelopes (hash, uid, mailbox_hash, modsequence, envelope) VALUES (?1, ?2, ?3, ?4, ?5)",
-                sqlite3::params![envelope.hash(), *uid as Sqlite3UID, mailbox_hash, modseq, &envelope],
-            ).chain_err_summary(|| format!("Could not insert envelope {} {} in header_cache of account {}", envelope.message_id(), envelope.hash(), uid_store.account_name))?;
+                        "INSERT OR REPLACE INTO envelopes (hash, uid, mailbox_hash, modsequence, \
+                         envelope) VALUES (?1, ?2, ?3, ?4, ?5)",
+                        sqlite3::params![
+                            envelope.hash(),
+                            *uid as Sqlite3UID,
+                            mailbox_hash,
+                            modseq,
+                            &envelope
+                        ],
+                    )
+                    .chain_err_summary(|| {
+                        format!(
+                            "Could not insert envelope {} {} in header_cache of account {}",
+                            envelope.message_id(),
+                            envelope.hash(),
+                            uid_store.account_name
+                        )
+                    })?;
                 }
             }
             tx.commit()?;
@@ -523,15 +562,17 @@ mod sqlite3_m {
                             env.tags_mut()
                                 .extend(tags.iter().map(|t| TagHash::from_bytes(t.as_bytes())));
                             tx.execute(
-                    "UPDATE envelopes SET envelope = ?1 WHERE mailbox_hash = ?2 AND uid = ?3;",
-                    sqlite3::params![&env, mailbox_hash, *uid as Sqlite3UID],
-                )
-                                .chain_err_summary(|| {
-                                    format!(
-                                        "Could not update envelope {} uid {} from  mailbox {} account {}",
-                                        env_hash, *uid, mailbox_hash, uid_store.account_name
-                                    )
-                                })?;
+                                "UPDATE envelopes SET envelope = ?1 WHERE mailbox_hash = ?2 AND \
+                                 uid = ?3;",
+                                sqlite3::params![&env, mailbox_hash, *uid as Sqlite3UID],
+                            )
+                            .chain_err_summary(|| {
+                                format!(
+                                    "Could not update envelope {} uid {} from  mailbox {} account \
+                                     {}",
+                                    env_hash, *uid, mailbox_hash, uid_store.account_name
+                                )
+                            })?;
                             uid_store
                                 .envelopes
                                 .lock()
@@ -563,8 +604,9 @@ mod sqlite3_m {
             let mut ret: Vec<(UID, Envelope, Option<ModSequence>)> = match identifier {
                 Ok(uid) => {
                     let mut stmt = self.connection.prepare(
-                "SELECT uid, envelope, modsequence FROM envelopes WHERE mailbox_hash = ?1 AND uid = ?2;",
-            )?;
+                        "SELECT uid, envelope, modsequence FROM envelopes WHERE mailbox_hash = ?1 \
+                         AND uid = ?2;",
+                    )?;
 
                     let x = stmt
                         .query_map(sqlite3::params![mailbox_hash, uid as Sqlite3UID], |row| {
@@ -579,8 +621,9 @@ mod sqlite3_m {
                 }
                 Err(env_hash) => {
                     let mut stmt = self.connection.prepare(
-                "SELECT uid, envelope, modsequence FROM envelopes WHERE mailbox_hash = ?1 AND hash = ?2;",
-            )?;
+                        "SELECT uid, envelope, modsequence FROM envelopes WHERE mailbox_hash = ?1 \
+                         AND hash = ?2;",
+                    )?;
 
                     let x = stmt
                         .query_map(sqlite3::params![mailbox_hash, env_hash], |row| {

melib/src/backends/imap/cache/sync.rs

@@ -130,7 +130,8 @@ impl ImapConnection {
         // 2.  tag1 UID FETCH <lastseenuid+1>:* <descriptors>
         self.send_command(
             format!(
-                "UID FETCH {}:* (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS (REFERENCES)] BODYSTRUCTURE)",
+                "UID FETCH {}:* (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS (REFERENCES)] \
+                 BODYSTRUCTURE)",
                 max_uid + 1
             )
             .as_bytes(),
@@ -375,9 +376,9 @@ impl ImapConnection {
             //   client MUST
             //   * empty the local cache of that mailbox;
             //   * "forget" the cached HIGHESTMODSEQ value for the mailbox;
-            //   * remove any pending "actions" that refer to UIDs in that
-            //     mailbox (note that this doesn't affect actions performed on
-            //     client-generated fake UIDs; see Section 5); and
+            //   * remove any pending "actions" that refer to UIDs in that mailbox (note
+            //     that this doesn't affect actions performed on client-generated fake UIDs;
+            //     see Section 5); and
             //   * skip steps 1b and 2-II;
             cache_handle.clear(mailbox_hash, &select_response)?;
             return Ok(None);
@@ -398,9 +399,9 @@ impl ImapConnection {
         let new_highestmodseq = select_response.highestmodseq.unwrap().unwrap();
         let mut refresh_events = vec![];
         // 1b) Check the mailbox HIGHESTMODSEQ.
-        //  If the cached value is the same as the one returned by the server, skip fetching
-        //  message flags on step 2-II, i.e., the client only has to find out which messages got
-        //  expunged.
+        //  If the cached value is the same as the one returned by the server, skip
+        // fetching  message flags on step 2-II, i.e., the client only has to
+        // find out which messages got  expunged.
         if cached_highestmodseq != new_highestmodseq {
             /* Cache is synced, only figure out which messages got expunged */
 
@@ -415,7 +416,8 @@ impl ImapConnection {
             // 2.  tag1 UID FETCH <lastseenuid+1>:* <descriptors>
             self.send_command(
                 format!(
-                    "UID FETCH {}:* (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS (REFERENCES)] BODYSTRUCTURE) (CHANGEDSINCE {})",
+                    "UID FETCH {}:* (UID FLAGS ENVELOPE BODY.PEEK[HEADER.FIELDS (REFERENCES)] \
+                     BODYSTRUCTURE) (CHANGEDSINCE {})",
                     cached_max_uid + 1,
                     cached_highestmodseq,
                 )
@@ -571,8 +573,8 @@ impl ImapConnection {
                 .insert(mailbox_hash, Ok(new_highestmodseq));
         }
         let mut valid_envs = BTreeSet::default();
-        // This should be UID SEARCH 1:<maxuid> but it's difficult to compare to cached UIDs at the
-        // point of calling this function
+        // This should be UID SEARCH 1:<maxuid> but it's difficult to compare to cached
+        // UIDs at the point of calling this function
         self.send_command(b"UID SEARCH ALL").await?;
         self.read_response(&mut response, RequiredResponses::SEARCH)
             .await?;
@@ -614,7 +616,8 @@ impl ImapConnection {
         Ok(Some(payload.into_iter().map(|(_, env)| env).collect()))
     }
 
-    //rfc7162_Quick Flag Changes Resynchronization (CONDSTORE)_and Quick Mailbox Resynchronization (QRESYNC)
+    //rfc7162_Quick Flag Changes Resynchronization (CONDSTORE)_and Quick Mailbox
+    // Resynchronization (QRESYNC)
     pub async fn resync_condstoreqresync(
         &mut self,
         _cache_handle: Box<dyn ImapCache>,
@@ -634,8 +637,8 @@ impl ImapConnection {
             )
         };
 
-        /* first SELECT the mailbox to get READ/WRITE permissions (because EXAMINE only
-         * returns READ-ONLY for both cases) */
+        /* first SELECT the mailbox to get READ/WRITE permissions (because EXAMINE
+         * only returns READ-ONLY for both cases) */
         let mut select_response = self
             .select_mailbox(mailbox_hash, &mut response, true)
             .await?

melib/src/backends/imap/connection.rs

@@ -20,33 +20,38 @@
  */
 
 use super::protocol_parser::{ImapLineSplit, ImapResponse, RequiredResponses, SelectResponse};
-use crate::backends::{MailboxHash, RefreshEvent};
-use crate::connections::{lookup_ipv4, timeout, Connection};
-use crate::email::parser::BytesExt;
-use crate::error::*;
+use crate::{
+    backends::{MailboxHash, RefreshEvent},
+    connections::{lookup_ipv4, timeout, Connection},
+    email::parser::BytesExt,
+    error::*,
+};
 extern crate native_tls;
+use std::{
+    collections::HashSet,
+    convert::TryFrom,
+    future::Future,
+    iter::FromIterator,
+    pin::Pin,
+    sync::Arc,
+    time::{Duration, Instant, SystemTime},
+};
+
 use futures::io::{AsyncReadExt, AsyncWriteExt};
 use native_tls::TlsConnector;
 pub use smol::Async as AsyncWrapper;
-use std::collections::HashSet;
-use std::convert::TryFrom;
-use std::future::Future;
-use std::iter::FromIterator;
-use std::pin::Pin;
-use std::sync::Arc;
-use std::time::{Duration, Instant, SystemTime};
 
 const IMAP_PROTOCOL_TIMEOUT: Duration = Duration::from_secs(60 * 28);
 
-use super::protocol_parser;
-use super::{Capabilities, ImapServerConf, UIDStore};
+use super::{protocol_parser, Capabilities, ImapServerConf, UIDStore};
 
 #[derive(Debug, Clone, Copy)]
 pub enum SyncPolicy {
     None,
     ///rfc4549 `Synch Ops for Disconnected IMAP4 Clients` <https://tools.ietf.org/html/rfc4549>
     Basic,
-    ///rfc7162 `IMAP Extensions: Quick Flag Changes Resynchronization (CONDSTORE) and Quick Mailbox Resynchronization (QRESYNC)`
+    ///rfc7162 `IMAP Extensions: Quick Flag Changes Resynchronization
+    /// (CONDSTORE) and Quick Mailbox Resynchronization (QRESYNC)`
     Condstore,
     CondstoreQresync,
 }
@@ -144,13 +149,14 @@ impl ImapStream {
                 if let Some(timeout) = server_conf.timeout {
                     TcpStream::connect_timeout(&addr, timeout)?
                 } else {
-                    TcpStream::connect(&addr)?
+                    TcpStream::connect(addr)?
                 },
             ))?;
             if server_conf.use_starttls {
                 let err_fn = || {
                     if server_conf.server_port == 993 {
-                        "STARTTLS failed. Server port is set to 993, which normally uses TLS. Maybe try disabling use_starttls."
+                        "STARTTLS failed. Server port is set to 993, which normally uses TLS. \
+                         Maybe try disabling use_starttls."
                     } else {
                         "STARTTLS failed. Is the connection already encrypted?"
                     }
@@ -246,7 +252,7 @@ impl ImapStream {
                 if let Some(timeout) = server_conf.timeout {
                     TcpStream::connect_timeout(&addr, timeout)?
                 } else {
-                    TcpStream::connect(&addr)?
+                    TcpStream::connect(addr)?
                 },
             ))?
         };
@@ -350,10 +356,14 @@ impl ImapStream {
                     .any(|cap| cap.eq_ignore_ascii_case(b"AUTH=XOAUTH2"))
                 {
                     return Err(Error::new(format!(
-                                "Could not connect to {}: OAUTH2 is enabled but server did not return AUTH=XOAUTH2 capability. Returned capabilities were: {}",
-                                &server_conf.server_hostname,
-                                capabilities.iter().map(|capability|
-                                    String::from_utf8_lossy(capability).to_string()).collect::<Vec<String>>().join(" ")
+                        "Could not connect to {}: OAUTH2 is enabled but server did not return \
+                         AUTH=XOAUTH2 capability. Returned capabilities were: {}",
+                        &server_conf.server_hostname,
+                        capabilities
+                            .iter()
+                            .map(|capability| String::from_utf8_lossy(capability).to_string())
+                            .collect::<Vec<String>>()
+                            .join(" ")
                     )));
                 }
                 ret.send_command(
@@ -414,8 +424,8 @@ impl ImapStream {
         }
 
         if capabilities.is_none() {
-            /* sending CAPABILITY after LOGIN automatically is an RFC recommendation, so check
-             * for lazy servers */
+            /* sending CAPABILITY after LOGIN automatically is an RFC recommendation, so
+             * check for lazy servers */
             drop(capabilities);
             ret.send_command(b"CAPABILITY").await?;
             ret.read_response(&mut res).await.unwrap();
@@ -648,7 +658,14 @@ impl ImapConnection {
                             | ImapResponse::Bad(code)
                             | ImapResponse::Preauth(code)
                             | ImapResponse::Bye(code) => {
-                                crate::log(format!("Could not use COMPRESS=DEFLATE in account `{}`: server replied with `{}`", self.uid_store.account_name, code), crate::LoggingLevel::WARN);
+                                crate::log(
+                                    format!(
+                                        "Could not use COMPRESS=DEFLATE in account `{}`: server \
+                                         replied with `{}`",
+                                        self.uid_store.account_name, code
+                                    ),
+                                    crate::LoggingLevel::WARN,
+                                );
                             }
                             ImapResponse::Ok(_) => {
                                 let ImapStream {
@@ -750,7 +767,7 @@ impl ImapConnection {
                         &required_responses
                     );*/
                     for l in response.split_rn() {
-                        /*debug!("check line: {}", &l);*/
+                        /* debug!("check line: {}", &l); */
                         if required_responses.check(l) || !self.process_untagged(l).await? {
                             ret.extend_from_slice(l);
                         }

melib/src/backends/imap/mailbox.rs

@@ -19,12 +19,15 @@
  * along with meli. If not, see <http://www.gnu.org/licenses/>.
  */
 
+use std::sync::{Arc, Mutex, RwLock};
+
 use super::protocol_parser::SelectResponse;
-use crate::backends::{
-    BackendMailbox, LazyCountSet, Mailbox, MailboxHash, MailboxPermissions, SpecialUsageMailbox,
+use crate::{
+    backends::{
+        BackendMailbox, LazyCountSet, Mailbox, MailboxHash, MailboxPermissions, SpecialUsageMailbox,
+    },
+    error::*,
 };
-use crate::error::*;
-use std::sync::{Arc, Mutex, RwLock};
 
 #[derive(Debug, Default, Clone)]
 pub struct ImapMailbox {
@@ -51,7 +54,8 @@ impl ImapMailbox {
         &self.imap_path
     }
 
-    /// Establish that mailbox contents have been fetched at least once during this execution
+    /// Establish that mailbox contents have been fetched at least once during
+    /// this execution
     #[inline(always)]
     pub fn set_warm(&self, new_value: bool) {
         *self.warm.lock().unwrap() = new_value;

melib/src/backends/imap/managesieve.rs

@@ -19,19 +19,25 @@
  * along with meli. If not, see <http://www.gnu.org/licenses/>.
  */
 
-use super::{ImapConnection, ImapProtocol, ImapServerConf, UIDStore};
-use crate::conf::AccountSettings;
-use crate::email::parser::IResult;
-use crate::error::{Error, Result};
-use crate::get_conf_val;
-use crate::imap::RequiredResponses;
+use std::{
+    str::FromStr,
+    sync::{Arc, Mutex},
+    time::SystemTime,
+};
+
 use nom::{
     branch::alt, bytes::complete::tag, combinator::map, multi::separated_list1,
     sequence::separated_pair,
 };
-use std::str::FromStr;
-use std::sync::{Arc, Mutex};
-use std::time::SystemTime;
+
+use super::{ImapConnection, ImapProtocol, ImapServerConf, UIDStore};
+use crate::{
+    conf::AccountSettings,
+    email::parser::IResult,
+    error::{Error, Result},
+    get_conf_val,
+    imap::RequiredResponses,
+};
 
 pub struct ManageSieveConnection {
     pub inner: ImapConnection,
@@ -61,12 +67,17 @@ pub enum ManageSieveResponse<'a> {
 }
 
 mod parser {
+    use nom::{
+        bytes::complete::tag,
+        character::complete::crlf,
+        combinator::{iterator, map, opt},
+    };
+    pub use nom::{
+        bytes::complete::{is_not, tag_no_case},
+        sequence::{delimited, pair, preceded, terminated},
+    };
+
     use super::*;
-    use nom::bytes::complete::tag;
-    pub use nom::bytes::complete::{is_not, tag_no_case};
-    use nom::character::complete::crlf;
-    use nom::combinator::{iterator, map, opt};
-    pub use nom::sequence::{delimited, pair, preceded, terminated};