Replace most 'extern crate' directives with 'use'.

  - See #480.

8 files changed, 18 insertions, 24 deletions

diff --git a/tool/build.rs b/tool/build.rs
index d4b6bf6e..b7d3147d 100644
--- a/tool/build.rs
+++ b/tool/build.rs
@@ -1,4 +1,4 @@
-extern crate clap;
+use clap;
 
 use std::env;
 use std::fs;
diff --git a/tool/src/commands/decrypt.rs b/tool/src/commands/decrypt.rs
index d7657cdb..07adabe6 100644
--- a/tool/src/commands/decrypt.rs
+++ b/tool/src/commands/decrypt.rs
@@ -4,7 +4,7 @@ use std::collections::HashMap;
 use std::io;
 use rpassword;
 
-extern crate sequoia_openpgp as openpgp;
+use sequoia_openpgp as openpgp;
 use sequoia_core::Context;
 use crate::openpgp::types::SymmetricAlgorithm;
 use crate::openpgp::fmt::hex;
@@ -21,7 +21,7 @@ use crate::openpgp::parse::stream::{
     VerificationHelper, DecryptionHelper, DecryptorBuilder, MessageStructure,
 };
 use crate::openpgp::policy::Policy;
-extern crate sequoia_store as store;
+use sequoia_store as store;
 
 use super::{dump::PacketDumper, VHelper};
 
diff --git a/tool/src/commands/dump.rs b/tool/src/commands/dump.rs
index 764c14f0..6f35f56d 100644
--- a/tool/src/commands/dump.rs
+++ b/tool/src/commands/dump.rs
@@ -1,6 +1,6 @@
 use std::io::{self, Read};
 
-extern crate sequoia_openpgp as openpgp;
+use sequoia_openpgp as openpgp;
 use self::openpgp::types::{Duration, Timestamp, SymmetricAlgorithm};
 use self::openpgp::fmt::hex;
 use self::openpgp::crypto::mpi;
diff --git a/tool/src/commands/inspect.rs b/tool/src/commands/inspect.rs
index 52ef375b..e275c261 100644
--- a/tool/src/commands/inspect.rs
+++ b/tool/src/commands/inspect.rs
@@ -3,7 +3,7 @@ use std::io::{self, Read};
 
 use clap;
 
-extern crate sequoia_openpgp as openpgp;
+use sequoia_openpgp as openpgp;
 use crate::openpgp::{KeyHandle, Packet, Result};
 use crate::openpgp::cert::prelude::*;
 use openpgp::packet::{
diff --git a/tool/src/commands/mod.rs b/tool/src/commands/mod.rs
index 04e84987..6415e2cf 100644
--- a/tool/src/commands/mod.rs
+++ b/tool/src/commands/mod.rs
@@ -6,7 +6,7 @@ use std::io::{self, Write};
 use std::time::SystemTime;
 use rpassword;
 
-extern crate sequoia_openpgp as openpgp;
+use sequoia_openpgp as openpgp;
 use sequoia_core::Context;
 use crate::openpgp::types::{
     CompressionAlgorithm,
@@ -29,7 +29,7 @@ use crate::openpgp::serialize::stream::{
     },
 };
 use crate::openpgp::policy::Policy;
-extern crate sequoia_store as store;
+use sequoia_store as store;
 
 pub mod decrypt;
 pub use self::decrypt::decrypt;
diff --git a/tool/src/commands/sign.rs b/tool/src/commands/sign.rs
index 9bc2af4d..41691af0 100644
--- a/tool/src/commands/sign.rs
+++ b/tool/src/commands/sign.rs
@@ -5,7 +5,7 @@ use std::path::PathBuf;
 use std::time::SystemTime;
 use tempfile::NamedTempFile;
 
-extern crate sequoia_openpgp as openpgp;
+use sequoia_openpgp as openpgp;
 use crate::openpgp::armor;
 use crate::openpgp::{Packet, Result};
 use crate::openpgp::packet::Signature;
diff --git a/tool/src/sq.rs b/tool/src/sq.rs
index a060f1c5..31107e93 100644
--- a/tool/src/sq.rs
+++ b/tool/src/sq.rs
@@ -1,17 +1,11 @@
 /// A command-line frontend for Sequoia.
 
-extern crate clap;
-#[macro_use]
-extern crate prettytable;
-extern crate rpassword;
-extern crate tempfile;
-extern crate crossterm;
-extern crate itertools;
-extern crate tokio_core;
+use crossterm;
+use tokio_core;
 
 use crossterm::terminal;
 use anyhow::Context as _;
-use prettytable::{Table, Cell, Row};
+use prettytable::{Table, Cell, Row, row, cell};
 use std::fs::OpenOptions;
 use std::io::{self, Write};
 use std::path::{Path, PathBuf};
@@ -19,10 +13,10 @@ use std::process::exit;
 use chrono::{DateTime, offset::Utc};
 
 use buffered_reader::File;
-extern crate sequoia_openpgp as openpgp;
-extern crate sequoia_core;
-extern crate sequoia_net;
-extern crate sequoia_store as store;
+use sequoia_openpgp as openpgp;
+use sequoia_core;
+use sequoia_net;
+use sequoia_store as store;
 
 use crate::openpgp::Result;
 use crate::openpgp::{armor, Cert};
diff --git a/tool/tests/sq-sign.rs b/tool/tests/sq-sign.rs
index 1b1ff820..f75d5b9e 100644
--- a/tool/tests/sq-sign.rs
+++ b/tool/tests/sq-sign.rs
@@ -1,12 +1,12 @@
 use std::fs::{self, File};
 use std::io;
 
-extern crate assert_cli;
+use assert_cli;
 use assert_cli::Assert;
-extern crate tempfile;
+use tempfile;
 use tempfile::TempDir;
 
-extern crate sequoia_openpgp as openpgp;
+use sequoia_openpgp as openpgp;
 use crate::openpgp::{Packet, PacketPile, Cert};
 use crate::openpgp::crypto::KeyPair;
 use crate::openpgp::packet::key::SecretKeyMaterial;