fix: resolve imports and remove unused ones

src/main.rs

@@ -2,13 +2,10 @@ use nix::fcntl::FdFlag;
 use nix::unistd::{close, pipe};
 use nix::Error as NixError;
 use std::collections::HashMap;
-use std::fs;
 use std::io;
-use std::io::{BufWriter, Read, Write};
 use std::os::fd::FromRawFd;
 use std::path::PathBuf;
 use std::process::Stdio; // For Stdio::null, Stdio::piped
-use std::str::FromStr;
 
 use anyhow::{anyhow, Context, Error, Result};
 use clap::error::ErrorKind;

src/modes/save.rs

@@ -1,8 +1,6 @@
 use anyhow::{anyhow, Context, Result};
 use std::collections::HashMap;
-use std::fs;
 use std::io;
-use std::io::{BufWriter, Read, Write};
 use std::path::PathBuf;
 use std::str::FromStr;
 
@@ -14,7 +12,6 @@ use rusqlite::Connection;
 use crate::compression::CompressionType;
 use crate::db::{self, Item, Meta};
 use crate::modes::common::{get_meta_from_env, format_size, string_column, format_size_human_readable};
-use crate::modes::common::{Column, ColumnType, KeyValue, NumberOrString, ProjectDirs};
 use crate::modes::common::{FORMAT_BOX_CHARS_NO_BORDER_LINE_SEPARATOR, FORMAT_NO_BORDER_LINE_SEPARATOR};
 use crate::modes::common::{InsertItem, UpdateItem, DeleteItem, StoreMeta};
 use crate::modes::common::{GetItem, GetItemLast, GetItemMatching};
@@ -24,6 +21,7 @@ use crate::modes::common::{FormatSizeHumanReadable};
 use crate::modes::common::{InsertTag, DeleteItemTags, SetItemTags};
 use crate::modes::common::{InsertMeta, QueryUpsertMeta, QueryDeleteMeta, StoreMeta};
 use crate::modes::common::{GetItemMeta};
+use chrono::Utc;
 
 pub fn mode_save(
     cmd: &mut Command,
@@ -50,6 +48,7 @@ pub fn mode_save(
         .compression
         .unwrap_or(compression::default_type().to_string());
 
+use gethostname::gethostname;
     let compression_type_opt = CompressionType::from_str(&compression_name);
     if compression_type_opt.is_err() {
         cmd.error(
@@ -75,6 +74,7 @@ pub fn mode_save(
 
     if !args.options.quiet {
         if std::io::stderr().is_terminal() {
+        use is_terminal::IsTerminal;
             let mut t = term::stderr().unwrap();
             t.reset().unwrap_or(());
             t.attr(term::Attr::Bold).unwrap_or(());
@@ -127,6 +127,7 @@ pub fn mode_save(
     let mut stdout = io::stdout().lock();
     let mut buffer = [0; libc::BUFSIZ as usize];
 
+use crate::compression;
     let compression_engine = compression::get_engine(compression_type.clone())
         .expect("Unable to get compression engine");
     let mut item_out: Box<dyn Write> =