diff --git a/src/bin/rustfmt.rs b/src/bin/rustfmt.rs
index 2de572f616e..d1f7a83187b 100644
--- a/src/bin/rustfmt.rs
+++ b/src/bin/rustfmt.rs
@@ -11,11 +11,11 @@
#![cfg(not(test))]
+extern crate env_logger;
+extern crate getopts;
extern crate log;
extern crate rustfmt_nightly as rustfmt;
extern crate toml;
-extern crate env_logger;
-extern crate getopts;
use std::{env, error};
use std::fs::File;
diff --git a/src/config.rs b/src/config.rs
index 65292d60b26..7b2fb9f629d 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -558,6 +558,8 @@ create_config! {
exceeds `chain_one_line_max`";
imports_indent: IndentStyle, IndentStyle::Visual, "Indent of imports";
imports_layout: ListTactic, ListTactic::Mixed, "Item layout inside a import block";
+ reorder_extern_crates: bool, true, "Reorder extern crate statements alphabetically";
+ reorder_extern_crates_in_group: bool, true, "Reorder extern crate statements in group";
reorder_imports: bool, false, "Reorder import statements alphabetically";
reorder_imports_in_group: bool, false, "Reorder import statements in group";
reorder_imported_names: bool, true,
diff --git a/src/imports.rs b/src/imports.rs
index a65d8bb066a..b73c85ddb56 100644
--- a/src/imports.rs
+++ b/src/imports.rs
@@ -113,11 +113,14 @@ fn compare_view_paths(a: &ast::ViewPath_, b: &ast::ViewPath_) -> Ordering {
}
}
-fn compare_use_items(a: &ast::Item, b: &ast::Item) -> Option<Ordering> {
+fn compare_use_items(context: &RewriteContext, a: &ast::Item, b: &ast::Item) -> Option<Ordering> {
match (&a.node, &b.node) {
(&ast::ItemKind::Use(ref a_vp), &ast::ItemKind::Use(ref b_vp)) => {
Some(compare_view_paths(&a_vp.node, &b_vp.node))
}
+ (&ast::ItemKind::ExternCrate(..), &ast::ItemKind::ExternCrate(..)) => {
+ Some(context.snippet(a.span).cmp(&context.snippet(b.span)))
+ }
_ => None,
}
}
@@ -214,7 +217,9 @@ impl<'a> FmtVisitor<'a> {
.collect::<Vec<_>>();
let pos_after_last_use_item = last_pos_of_prev_use_item;
// Order the imports by view-path & other import path properties
- ordered_use_items.sort_by(|a, b| compare_use_items(a.0, b.0).unwrap());
+ ordered_use_items.sort_by(|a, b| {
+ compare_use_items(&self.get_context(), a.0, b.0).unwrap()
+ });
// First, output the span before the first import
let prev_span_str = self.snippet(utils::mk_sp(self.last_pos, pos_before_first_use_item));
// Look for purely trailing space at the start of the prefix snippet before a linefeed, or
diff --git a/src/lib.rs b/src/lib.rs
index e1017fab959..eaac371aa5b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,23 +10,19 @@
#![feature(rustc_private)]
+extern crate diff;
#[macro_use]
extern crate log;
-
+extern crate regex;
+extern crate rustc_errors as errors;
extern crate serde;
#[macro_use]
extern crate serde_derive;
extern crate serde_json;
-
-extern crate syntax;
-extern crate rustc_errors as errors;
-
extern crate strings;
-
-extern crate unicode_segmentation;
-extern crate regex;
-extern crate diff;
+extern crate syntax;
extern crate term;
+extern crate unicode_segmentation;
use std::collections::HashMap;
use std::fmt;
diff --git a/src/visitor.rs b/src/visitor.rs
index c9fa7065511..3427867274a 100644
--- a/src/visitor.rs
+++ b/src/visitor.rs
@@ -36,6 +36,13 @@ fn is_use_item(item: &ast::Item) -> bool {
}
}
+fn is_extern_crate(item: &ast::Item) -> bool {
+ match item.node {
+ ast::ItemKind::ExternCrate(..) => true,
+ _ => false,
+ }
+}
+
pub struct FmtVisitor<'a> {
pub parse_session: &'a ParseSess,
pub codemap: &'a CodeMap,
@@ -627,6 +634,44 @@ impl<'a> FmtVisitor<'a> {
false
}
+ fn reorder_items<F>(
+ &mut self,
+ items_left: &[ptr::P<ast::Item>],
+ is_item: &F,
+ in_group: bool,
+ ) -> usize
+ where
+ F: Fn(&ast::Item) -> bool,
+ {
+ let mut last = self.codemap.lookup_line_range(items_left[0].span());
+ let item_length = items_left
+ .iter()
+ .take_while(|ppi| {
+ is_item(&***ppi) && (!in_group || {
+ let current = self.codemap.lookup_line_range(ppi.span());
+ let in_same_group = current.lo < last.hi + 2;
+ last = current;
+ in_same_group
+ })
+ })
+ .count();
+ let items = &items_left[..item_length];
+
+ let at_least_one_in_file_lines = items
+ .iter()
+ .any(|item| !out_of_file_lines_range!(self, item.span));
+
+ if at_least_one_in_file_lines {
+ self.format_imports(items);
+ } else {
+ for item in items {
+ self.push_rewrite(item.span, None);
+ }
+ }
+
+ item_length
+ }
+
fn walk_mod_items(&mut self, m: &ast::Mod) {
let mut items_left: &[ptr::P<ast::Item>] = &m.items;
while !items_left.is_empty() {
@@ -634,33 +679,20 @@ impl<'a> FmtVisitor<'a> {
// to be potentially reordered within `format_imports`. Otherwise, just format the
// next item for output.
if self.config.reorder_imports() && is_use_item(&*items_left[0]) {
- let reorder_imports_in_group = self.config.reorder_imports_in_group();
- let mut last = self.codemap.lookup_line_range(items_left[0].span());
- let use_item_length = items_left
- .iter()
- .take_while(|ppi| {
- is_use_item(&***ppi) && (!reorder_imports_in_group || {
- let current = self.codemap.lookup_line_range(ppi.span());
- let in_same_group = current.lo < last.hi + 2;
- last = current;
- in_same_group
- })
- })
- .count();
- let (use_items, rest) = items_left.split_at(use_item_length);
-
- let at_least_one_in_file_lines = use_items
- .iter()
- .any(|item| !out_of_file_lines_range!(self, item.span));
-
- if at_least_one_in_file_lines {
- self.format_imports(use_items);
- } else {
- for item in use_items {
- self.push_rewrite(item.span, None);
- }
- }
-
+ let used_items_len = self.reorder_items(
+ &items_left,
+ &is_use_item,
+ self.config.reorder_imports_in_group(),
+ );
+ let (_, rest) = items_left.split_at(used_items_len);
+ items_left = rest;
+ } else if self.config.reorder_extern_crates() && is_extern_crate(&*items_left[0]) {
+ let used_items_len = self.reorder_items(
+ &items_left,
+ &is_extern_crate,
+ self.config.reorder_extern_crates_in_group(),
+ );
+ let (_, rest) = items_left.split_at(used_items_len);
items_left = rest;
} else {
// `unwrap()` is safe here because we know `items_left`
diff --git a/tests/source/extern.rs b/tests/source/extern.rs
index 7f14d27b779..5546b217226 100644
--- a/tests/source/extern.rs
+++ b/tests/source/extern.rs
@@ -3,6 +3,13 @@
extern crate foo ;
extern crate foo as bar ;
+extern crate futures;
+extern crate dotenv;
+extern crate chrono;
+
+extern crate foo;
+extern crate bar;
+
extern "C" {
fn c_func(x: *mut *mut libc::c_void);
diff --git a/tests/system.rs b/tests/system.rs
index d915e11d534..6e148147a48 100644
--- a/tests/system.rs
+++ b/tests/system.rs
@@ -8,9 +8,9 @@
// option. This file may not be copied, modified, or distributed
// except according to those terms.
-extern crate rustfmt_nightly as rustfmt;
extern crate diff;
extern crate regex;
+extern crate rustfmt_nightly as rustfmt;
extern crate term;
use std::collections::HashMap;
diff --git a/tests/target/attrib-extern-crate.rs b/tests/target/attrib-extern-crate.rs
index fe06195b154..ed64a0aeb07 100644
--- a/tests/target/attrib-extern-crate.rs
+++ b/tests/target/attrib-extern-crate.rs
@@ -1,17 +1,17 @@
// Attributes on extern crate.
-extern crate Foo;
#[Attr1]
extern crate Bar;
#[Attr2]
#[Attr2]
extern crate Baz;
+extern crate Foo;
fn foo() {
- extern crate Foo;
#[Attr1]
extern crate Bar;
#[Attr2]
#[Attr2]
extern crate Baz;
+ extern crate Foo;
}
diff --git a/tests/target/extern.rs b/tests/target/extern.rs
index 1431c384db9..c0601a4d0e1 100644
--- a/tests/target/extern.rs
+++ b/tests/target/extern.rs
@@ -1,7 +1,14 @@
// rustfmt-normalize_comments: true
-extern crate foo;
extern crate foo as bar;
+extern crate foo;
+
+extern crate chrono;
+extern crate dotenv;
+extern crate futures;
+
+extern crate bar;
+extern crate foo;
extern "C" {
fn c_func(x: *mut *mut libc::c_void);