Auto merge of #7779 - ehuss:fix-cargo-lock-ignore, r=alexcrichton

Fix .gitignore of Cargo.lock in a subdirectory.

The code for checking if `Cargo.lock` is ignored was erroneously assuming it was at the root of the git repo.  This would cause a problem if `Cargo.lock` is in `.gitignore` in a subdirectory.

Fixes issue noted in #7705 (comment)

src/cargo/ops/cargo_package.rs

@@ -299,7 +299,9 @@ fn check_repo_state(
                 if let Ok(status) = repo.status_file(relative) {
                     if status == git2::Status::CURRENT {
                         false
-                    } else if relative.to_str().unwrap_or("") == "Cargo.lock" {
+                    } else if relative.file_name().and_then(|s| s.to_str()).unwrap_or("")
+                        == "Cargo.lock"
+                    {
                         // It is OK to include this file even if it is ignored.
                         status != git2::Status::IGNORED
                     } else {

tests/testsuite/publish_lockfile.rs

@@ -404,24 +404,18 @@ fn ignore_lockfile() {
     // With an explicit `include` list, but Cargo.lock in .gitignore, don't
     // complain about `Cargo.lock` being ignored. Note that it is still
     // included in the packaged regardless.
-    let (p, _r) = git::new_repo("foo", |p| {
+    let p = git::new("foo", |p| {
         p.file(
             "Cargo.toml",
-            r#"
-                [package]
-                name = "foo"
-                version = "0.0.1"
-                authors = []
-                license = "MIT"
-                description = "foo"
-                documentation = "foo"
-                homepage = "foo"
-                repository = "foo"
-
+            &pl_manifest(
+                "foo",
+                "0.0.1",
+                r#"
                 include = [
                     "src/main.rs"
                 ]
-            "#,
+                "#,
+            ),
         )
         .file("src/main.rs", "fn main() {}")
         .file(".gitignore", "Cargo.lock")
@@ -453,3 +447,27 @@ src/main.rs
         )
         .run();
 }
+
+#[cargo_test]
+fn ignore_lockfile_inner() {
+    // Ignore `Cargo.lock` if in .gitignore in a git subdirectory.
+    let p = git::new("foo", |p| {
+        p.no_manifest()
+            .file("bar/Cargo.toml", &pl_manifest("bar", "0.0.1", ""))
+            .file("bar/src/main.rs", "fn main() {}")
+            .file("bar/.gitignore", "Cargo.lock")
+    });
+    p.cargo("generate-lockfile").cwd("bar").run();
+    p.cargo("package -v --no-verify")
+        .cwd("bar")
+        .with_stderr(
+            "\
+[PACKAGING] bar v0.0.1 ([..])
+[ARCHIVING] Cargo.toml
+[ARCHIVING] src/main.rs
+[ARCHIVING] .cargo_vcs_info.json
+[ARCHIVING] Cargo.lock
+",
+        )
+        .run();
+}