From 8573a1319a63fa61d1db9b9ff8239b5eeb3c1d56 Mon Sep 17 00:00:00 2001
From: steveklabnik <steve@steveklabnik.com>
Date: Tue, 7 Mar 2017 14:49:50 -0500
Subject: [PATCH] build both editions of the book

---
 src/bootstrap/doc.rs  | 5 +++++
 src/bootstrap/step.rs | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index db8ed579cec..3c024f4c4ef 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -53,6 +53,11 @@ pub fn rustbook(build: &Build, target: &str, name: &str) {
                    .arg(out));
 }
 
+pub fn book(build: &Build, target: &str, name: &str) {
+    rustbook(build, target, &format!("{}/first-edition", name));
+    rustbook(build, target, &format!("{}/second-edition", name));
+}
+
 /// Generates all standalone documentation as compiled by the rustdoc in `stage`
 /// for the `target` into `out`.
 ///
diff --git a/src/bootstrap/step.rs b/src/bootstrap/step.rs
index 6b047c62d99..6eb12fed5ab 100644
--- a/src/bootstrap/step.rs
+++ b/src/bootstrap/step.rs
@@ -581,7 +581,7 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
               .stage(0)
          })
          .default(build.config.docs)
-         .run(move |s| doc::rustbook(build, s.target, "book"));
+         .run(move |s| doc::book(build, s.target, "book"));
     rules.doc("doc-nomicon", "src/doc/nomicon")
          .dep(move |s| {
              s.name("tool-rustbook")