Auto merge of #39750 - alexcrichton:beta-next, r=brson

[beta] Another round of backporting PRs to beta

This is a backport of the following PRs:

* #39622
* #39630
* #39660
* #39676

mk/main.mk

@@ -18,7 +18,7 @@ CFG_RELEASE_NUM=1.16.0
 # An optional number to put after the label, e.g. '.2' -> '-beta.2'
 # NB Make sure it starts with a dot to conform to semver pre-release
 # versions (section 9)
-CFG_PRERELEASE_VERSION=.1
+CFG_PRERELEASE_VERSION=.2
 
 ifeq ($(CFG_RELEASE_CHANNEL),stable)
 # This is the normal semver version string, e.g. "0.12.0", "0.12.0-nightly"

src/bootstrap/clean.rs

@@ -24,6 +24,7 @@ use Build;
 pub fn clean(build: &Build) {
     rm_rf(build, "tmp".as_ref());
     rm_rf(build, &build.out.join("tmp"));
+    rm_rf(build, &build.out.join("dist"));
 
     for host in build.config.host.iter() {
         let entries = match build.out.join(host).read_dir() {

src/tools/build-manifest/src/main.rs

@@ -11,7 +11,7 @@
 extern crate toml;
 extern crate rustc_serialize;
 
-use std::collections::HashMap;
+use std::collections::{BTreeMap, HashMap};
 use std::env;
 use std::fs::File;
 use std::io::{self, Read, Write};
@@ -95,7 +95,6 @@ static MINGW: &'static [&'static str] = &[
     "x86_64-pc-windows-gnu",
 ];
 
-#[derive(RustcEncodable)]
 struct Manifest {
     manifest_version: String,
     date: String,
@@ -171,8 +170,18 @@ impl Builder {
         self.cargo_version = self.version("cargo", "x86_64-unknown-linux-gnu");
 
         self.digest_and_sign();
-        let manifest = self.build_manifest();
-        let manifest = toml::encode(&manifest).to_string();
+        let Manifest { manifest_version, date, pkg } = self.build_manifest();
+
+        // Unfortunately we can't use derive(RustcEncodable) here because the
+        // version field is called `manifest-version`, not `manifest_version`.
+        // In lieu of that just create the table directly here with a `BTreeMap`
+        // and wrap it up in a `Value::Table`.
+        let mut manifest = BTreeMap::new();
+        manifest.insert("manifest-version".to_string(),
+                        toml::Value::String(manifest_version));
+        manifest.insert("date".to_string(), toml::Value::String(date));
+        manifest.insert("pkg".to_string(), toml::encode(&pkg));
+        let manifest = toml::Value::Table(manifest).to_string();
 
         let filename = format!("channel-rust-{}.toml", self.channel);
         self.write_manifest(&manifest, &filename);
@@ -352,7 +361,8 @@ impl Builder {
     fn hash(&self, path: &Path) -> String {
         let sha = t!(Command::new("shasum")
                         .arg("-a").arg("256")
-                        .arg(path)
+                        .arg(path.file_name().unwrap())
+                        .current_dir(path.parent().unwrap())
                         .output());
         assert!(sha.status.success());