build: export repository information

The repository string is made available via the `CARGO_PKG_REPOSITORY`
environment variable similar to other metadata.

src/cargo/core/compiler/compilation.rs

@@ -236,6 +236,10 @@ impl<'cfg> Compilation<'cfg> {
                 "CARGO_PKG_HOMEPAGE",
                 metadata.homepage.as_ref().unwrap_or(&String::new()),
             )
+            .env(
+                "CARGO_PKG_REPOSITORY",
+                metadata.repository.as_ref().unwrap_or(&String::new()),
+            )
             .env("CARGO_PKG_AUTHORS", &pkg.authors().join(":"))
             .cwd(pkg.root());
         Ok(cmd)

src/doc/src/reference/environment-variables.md

@@ -63,6 +63,7 @@ let version = env!("CARGO_PKG_VERSION");
 * `CARGO_PKG_NAME` - The name of your package.
 * `CARGO_PKG_DESCRIPTION` - The description of your package.
 * `CARGO_PKG_HOMEPAGE` - The home page of your package.
+* `CARGO_PKG_REPOSITORY` - The repository of your package.
 * `OUT_DIR` - If the package has a build script, this is set to the folder where the build
               script should place its output.  See below for more information.
 

tests/testsuite/build.rs

@@ -1338,6 +1338,7 @@ fn crate_env_vars() {
         version = "0.5.1-alpha.1"
         description = "This is foo"
         homepage = "http://example.com"
+        repository = "http://example.com/repo.git"
         authors = ["[email protected]"]
         "#,
         ).file(
@@ -1354,6 +1355,7 @@ fn crate_env_vars() {
             static CARGO_MANIFEST_DIR: &'static str = env!("CARGO_MANIFEST_DIR");
             static PKG_NAME: &'static str = env!("CARGO_PKG_NAME");
             static HOMEPAGE: &'static str = env!("CARGO_PKG_HOMEPAGE");
+            static REPOSITORY: &'static str = env!("CARGO_PKG_REPOSITORY");
             static DESCRIPTION: &'static str = env!("CARGO_PKG_DESCRIPTION");
 
             fn main() {
@@ -1364,6 +1366,7 @@ fn crate_env_vars() {
                  println!("{}", s);
                  assert_eq!("foo", PKG_NAME);
                  assert_eq!("http://example.com", HOMEPAGE);
+                 assert_eq!("http://example.com/repo.git", REPOSITORY);
                  assert_eq!("This is foo", DESCRIPTION);
                 let s = format!("{}.{}.{}-{}", VERSION_MAJOR,
                                 VERSION_MINOR, VERSION_PATCH, VERSION_PRE);