Remove src_is_git, instead call method on rust_info directly.

src/bootstrap/channel.rs

@@ -101,4 +101,8 @@ pub fn version(&self, build: &Build, num: &str) -> String {
         }
         version
     }
+
+    pub fn is_git(&self) -> bool {
+        self.inner.is_some()
+    }
 }

src/bootstrap/dist.rs

@@ -623,7 +623,7 @@ pub fn plain_source_tarball(build: &Build) {
     write_file(&plain_dst_src.join("version"), build.rust_version().as_bytes());
 
     // If we're building from git sources, we need to vendor a complete distribution.
-    if build.src_is_git {
+    if build.rust_info.is_git() {
         // Get cargo-vendor installed, if it isn't already.
         let mut has_cargo_vendor = false;
         let mut cmd = Command::new(&build.initial_cargo);

src/bootstrap/lib.rs

@@ -183,7 +183,6 @@ pub struct Build {
     cxx: HashMap<String, gcc::Tool>,
     crates: HashMap<String, Crate>,
     is_sudo: bool,
-    src_is_git: bool,
     ci_env: CiEnv,
     delayed_failures: Cell<usize>,
 }
@@ -262,7 +261,6 @@ pub fn new(flags: Flags, config: Config) -> Build {
             lldb_version: None,
             lldb_python_dir: None,
             is_sudo: is_sudo,
-            src_is_git: src_is_git,
             ci_env: CiEnv::current(),
             delayed_failures: Cell::new(0),
         }

src/bootstrap/sanity.rs

@@ -80,7 +80,7 @@ pub fn check(build: &mut Build) {
     let mut cmd_finder = Finder::new();
     // If we've got a git directory we're gona need git to update
     // submodules and learn about various other aspects.
-    if build.src_is_git {
+    if build.rust_info.is_git() {
         cmd_finder.must_have("git");
     }