1 files changed, 600 insertions, 0 deletions
diff --git a/src/tools/cargo/tests/testsuite/dep_info.rs b/src/tools/cargo/tests/testsuite/dep_info.rs
new file mode 100644
index 000000000..e9ea47792
--- /dev/null
+++ b/src/tools/cargo/tests/testsuite/dep_info.rs
@@ -0,0 +1,600 @@
+//! Tests for dep-info files. This includes the dep-info file Cargo creates in
+//! the output directory, and the ones stored in the fingerprint.
+
+use cargo_test_support::compare::assert_match_exact;
+use cargo_test_support::paths::{self, CargoPathExt};
+use cargo_test_support::registry::Package;
+use cargo_test_support::{
+    basic_bin_manifest, basic_manifest, main_file, project, rustc_host, Project,
+};
+use filetime::FileTime;
+use std::fs;
+use std::path::Path;
+use std::str;
+
+// Helper for testing dep-info files in the fingerprint dir.
+#[track_caller]
+fn assert_deps(project: &Project, fingerprint: &str, test_cb: impl Fn(&Path, &[(u8, &str)])) {
+    let mut files = project
+        .glob(fingerprint)
+        .map(|f| f.expect("unwrap glob result"))
+        // Filter out `.json` entries.
+        .filter(|f| f.extension().is_none());
+    let info_path = files
+        .next()
+        .unwrap_or_else(|| panic!("expected 1 dep-info file at {}, found 0", fingerprint));
+    assert!(files.next().is_none(), "expected only 1 dep-info file");
+    let dep_info = fs::read(&info_path).unwrap();
+    let dep_info = &mut &dep_info[..];
+    let deps = (0..read_usize(dep_info))
+        .map(|_| {
+            (
+                read_u8(dep_info),
+                str::from_utf8(read_bytes(dep_info)).unwrap(),
+            )
+        })
+        .collect::<Vec<_>>();
+    test_cb(&info_path, &deps);
+
+    fn read_usize(bytes: &mut &[u8]) -> usize {
+        let ret = &bytes[..4];
+        *bytes = &bytes[4..];
+
+        u32::from_le_bytes(ret.try_into().unwrap()) as usize
+    }
+
+    fn read_u8(bytes: &mut &[u8]) -> u8 {
+        let ret = bytes[0];
+        *bytes = &bytes[1..];
+        ret
+    }
+
+    fn read_bytes<'a>(bytes: &mut &'a [u8]) -> &'a [u8] {
+        let n = read_usize(bytes);
+        let ret = &bytes[..n];
+        *bytes = &bytes[n..];
+        ret
+    }
+}
+
+fn assert_deps_contains(project: &Project, fingerprint: &str, expected: &[(u8, &str)]) {
+    assert_deps(project, fingerprint, |info_path, entries| {
+        for (e_kind, e_path) in expected {
+            let pattern = glob::Pattern::new(e_path).unwrap();
+            let count = entries
+                .iter()
+                .filter(|(kind, path)| kind == e_kind && pattern.matches(path))
+                .count();
+            if count != 1 {
+                panic!(
+                    "Expected 1 match of {} {} in {:?}, got {}:\n{:#?}",
+                    e_kind, e_path, info_path, count, entries
+                );
+            }
+        }
+    })
+}
+
+#[cargo_test]
+fn build_dep_info() {
+    let p = project()
+        .file("Cargo.toml", &basic_bin_manifest("foo"))
+        .file("src/foo.rs", &main_file(r#""i am foo""#, &[]))
+        .build();
+
+    p.cargo("build").run();
+
+    let depinfo_bin_path = &p.bin("foo").with_extension("d");
+
+    assert!(depinfo_bin_path.is_file());
+
+    let depinfo = p.read_file(depinfo_bin_path.to_str().unwrap());
+
+    let bin_path = p.bin("foo");
+    let src_path = p.root().join("src").join("foo.rs");
+    if !depinfo.lines().any(|line| {
+        line.starts_with(&format!("{}:", bin_path.display()))
+            && line.contains(src_path.to_str().unwrap())
+    }) {
+        panic!(
+            "Could not find {:?}: {:?} in {:?}",
+            bin_path, src_path, depinfo_bin_path
+        );
+    }
+}
+
+#[cargo_test]
+fn build_dep_info_lib() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+                authors = []
+
+                [[example]]
+                name = "ex"
+                crate-type = ["lib"]
+            "#,
+        )
+        .file("build.rs", "fn main() {}")
+        .file("src/lib.rs", "")
+        .file("examples/ex.rs", "")
+        .build();
+
+    p.cargo("build --example=ex").run();
+    assert!(p.example_lib("ex", "lib").with_extension("d").is_file());
+}
+
+#[cargo_test]
+fn build_dep_info_rlib() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+                authors = []
+
+                [[example]]
+                name = "ex"
+                crate-type = ["rlib"]
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .file("examples/ex.rs", "")
+        .build();
+
+    p.cargo("build --example=ex").run();
+    assert!(p.example_lib("ex", "rlib").with_extension("d").is_file());
+}
+
+#[cargo_test]
+fn build_dep_info_dylib() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+                authors = []
+
+                [[example]]
+                name = "ex"
+                crate-type = ["dylib"]
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .file("examples/ex.rs", "")
+        .build();
+
+    p.cargo("build --example=ex").run();
+    assert!(p.example_lib("ex", "dylib").with_extension("d").is_file());
+}
+
+#[cargo_test]
+fn dep_path_inside_target_has_correct_path() {
+    let p = project()
+        .file("Cargo.toml", &basic_bin_manifest("a"))
+        .file("target/debug/blah", "")
+        .file(
+            "src/main.rs",
+            r#"
+                fn main() {
+                    let x = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/target/debug/blah"));
+                }
+            "#,
+        )
+        .build();
+
+    p.cargo("build").run();
+
+    let depinfo_path = &p.bin("a").with_extension("d");
+
+    assert!(depinfo_path.is_file(), "{:?}", depinfo_path);
+
+    let depinfo = p.read_file(depinfo_path.to_str().unwrap());
+
+    let bin_path = p.bin("a");
+    let target_debug_blah = Path::new("target").join("debug").join("blah");
+    if !depinfo.lines().any(|line| {
+        line.starts_with(&format!("{}:", bin_path.display()))
+            && line.contains(target_debug_blah.to_str().unwrap())
+    }) {
+        panic!(
+            "Could not find {:?}: {:?} in {:?}",
+            bin_path, target_debug_blah, depinfo_path
+        );
+    }
+}
+
+#[cargo_test]
+fn no_rewrite_if_no_change() {
+    let p = project().file("src/lib.rs", "").build();
+
+    p.cargo("build").run();
+    let dep_info = p.root().join("target/debug/libfoo.d");
+    let metadata1 = dep_info.metadata().unwrap();
+    p.cargo("build").run();
+    let metadata2 = dep_info.metadata().unwrap();
+
+    assert_eq!(
+        FileTime::from_last_modification_time(&metadata1),
+        FileTime::from_last_modification_time(&metadata2),
+    );
+}
+
+#[cargo_test(nightly, reason = "-Z binary-dep-depinfo is unstable")]
+fn relative_depinfo_paths_ws() {
+    // Test relative dep-info paths in a workspace with --target with
+    // proc-macros and other dependency kinds.
+    Package::new("regdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+    Package::new("pmdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+    Package::new("bdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+
+    let p = project()
+        /*********** Workspace ***********/
+        .file(
+            "Cargo.toml",
+            r#"
+            [workspace]
+            members = ["foo"]
+            "#,
+        )
+        /*********** Main Project ***********/
+        .file(
+            "foo/Cargo.toml",
+            r#"
+            [package]
+            name = "foo"
+            version = "0.1.0"
+            edition = "2018"
+
+            [dependencies]
+            pm = {path = "../pm"}
+            bar = {path = "../bar"}
+            regdep = "0.1"
+
+            [build-dependencies]
+            bdep = "0.1"
+            bar = {path = "../bar"}
+            "#,
+        )
+        .file(
+            "foo/src/main.rs",
+            r#"
+            pm::noop!{}
+
+            fn main() {
+                bar::f();
+                regdep::f();
+            }
+            "#,
+        )
+        .file("foo/build.rs", "fn main() { bdep::f(); }")
+        /*********** Proc Macro ***********/
+        .file(
+            "pm/Cargo.toml",
+            r#"
+            [package]
+            name = "pm"
+            version = "0.1.0"
+            edition = "2018"
+
+            [lib]
+            proc-macro = true
+
+            [dependencies]
+            pmdep = "0.1"
+            "#,
+        )
+        .file(
+            "pm/src/lib.rs",
+            r#"
+            extern crate proc_macro;
+            use proc_macro::TokenStream;
+
+            #[proc_macro]
+            pub fn noop(_item: TokenStream) -> TokenStream {
+                pmdep::f();
+                "".parse().unwrap()
+            }
+            "#,
+        )
+        /*********** Path Dependency `bar` ***********/
+        .file("bar/Cargo.toml", &basic_manifest("bar", "0.1.0"))
+        .file("bar/src/lib.rs", "pub fn f() {}")
+        .build();
+
+    let host = rustc_host();
+    p.cargo("build -Z binary-dep-depinfo --target")
+        .arg(&host)
+        .masquerade_as_nightly_cargo(&["binary-dep-depinfo"])
+        .with_stderr_contains("[COMPILING] foo [..]")
+        .run();
+
+    assert_deps_contains(
+        &p,
+        "target/debug/.fingerprint/pm-*/dep-lib-pm",
+        &[(0, "src/lib.rs"), (1, "debug/deps/libpmdep-*.rlib")],
+    );
+
+    assert_deps_contains(
+        &p,
+        &format!("target/{}/debug/.fingerprint/foo-*/dep-bin-foo", host),
+        &[
+            (0, "src/main.rs"),
+            (
+                1,
+                &format!(
+                    "debug/deps/{}pm-*.{}",
+                    paths::get_lib_prefix("proc-macro"),
+                    paths::get_lib_extension("proc-macro")
+                ),
+            ),
+            (1, &format!("{}/debug/deps/libbar-*.rlib", host)),
+            (1, &format!("{}/debug/deps/libregdep-*.rlib", host)),
+        ],
+    );
+
+    assert_deps_contains(
+        &p,
+        "target/debug/.fingerprint/foo-*/dep-build-script-build-script-build",
+        &[(0, "build.rs"), (1, "debug/deps/libbdep-*.rlib")],
+    );
+
+    // Make sure it stays fresh.
+    p.cargo("build -Z binary-dep-depinfo --target")
+        .arg(&host)
+        .masquerade_as_nightly_cargo(&["binary-dep-depinfo"])
+        .with_stderr("[FINISHED] dev [..]")
+        .run();
+}
+
+#[cargo_test(nightly, reason = "-Z binary-dep-depinfo is unstable")]
+fn relative_depinfo_paths_no_ws() {
+    // Test relative dep-info paths without a workspace with proc-macros and
+    // other dependency kinds.
+    Package::new("regdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+    Package::new("pmdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+    Package::new("bdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+
+    let p = project()
+        /*********** Main Project ***********/
+        .file(
+            "Cargo.toml",
+            r#"
+            [package]
+            name = "foo"
+            version = "0.1.0"
+            edition = "2018"
+
+            [dependencies]
+            pm = {path = "pm"}
+            bar = {path = "bar"}
+            regdep = "0.1"
+
+            [build-dependencies]
+            bdep = "0.1"
+            bar = {path = "bar"}
+            "#,
+        )
+        .file(
+            "src/main.rs",
+            r#"
+            pm::noop!{}
+
+            fn main() {
+                bar::f();
+                regdep::f();
+            }
+            "#,
+        )
+        .file("build.rs", "fn main() { bdep::f(); }")
+        /*********** Proc Macro ***********/
+        .file(
+            "pm/Cargo.toml",
+            r#"
+            [package]
+            name = "pm"
+            version = "0.1.0"
+            edition = "2018"
+
+            [lib]
+            proc-macro = true
+
+            [dependencies]
+            pmdep = "0.1"
+            "#,
+        )
+        .file(
+            "pm/src/lib.rs",
+            r#"
+            extern crate proc_macro;
+            use proc_macro::TokenStream;
+
+            #[proc_macro]
+            pub fn noop(_item: TokenStream) -> TokenStream {
+                pmdep::f();
+                "".parse().unwrap()
+            }
+            "#,
+        )
+        /*********** Path Dependency `bar` ***********/
+        .file("bar/Cargo.toml", &basic_manifest("bar", "0.1.0"))
+        .file("bar/src/lib.rs", "pub fn f() {}")
+        .build();
+
+    p.cargo("build -Z binary-dep-depinfo")
+        .masquerade_as_nightly_cargo(&["binary-dep-depinfo"])
+        .with_stderr_contains("[COMPILING] foo [..]")
+        .run();
+
+    assert_deps_contains(
+        &p,
+        "target/debug/.fingerprint/pm-*/dep-lib-pm",
+        &[(0, "src/lib.rs"), (1, "debug/deps/libpmdep-*.rlib")],
+    );
+
+    assert_deps_contains(
+        &p,
+        "target/debug/.fingerprint/foo-*/dep-bin-foo",
+        &[
+            (0, "src/main.rs"),
+            (
+                1,
+                &format!(
+                    "debug/deps/{}pm-*.{}",
+                    paths::get_lib_prefix("proc-macro"),
+                    paths::get_lib_extension("proc-macro")
+                ),
+            ),
+            (1, "debug/deps/libbar-*.rlib"),
+            (1, "debug/deps/libregdep-*.rlib"),
+        ],
+    );
+
+    assert_deps_contains(
+        &p,
+        "target/debug/.fingerprint/foo-*/dep-build-script-build-script-build",
+        &[(0, "build.rs"), (1, "debug/deps/libbdep-*.rlib")],
+    );
+
+    // Make sure it stays fresh.
+    p.cargo("build -Z binary-dep-depinfo")
+        .masquerade_as_nightly_cargo(&["binary-dep-depinfo"])
+        .with_stderr("[FINISHED] dev [..]")
+        .run();
+}
+
+#[cargo_test]
+fn reg_dep_source_not_tracked() {
+    // Make sure source files in dep-info file are not tracked for registry dependencies.
+    Package::new("regdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            [package]
+            name = "foo"
+            version = "0.1.0"
+
+            [dependencies]
+            regdep = "0.1"
+            "#,
+        )
+        .file("src/lib.rs", "pub fn f() { regdep::f(); }")
+        .build();
+
+    p.cargo("check").run();
+
+    assert_deps(
+        &p,
+        "target/debug/.fingerprint/regdep-*/dep-lib-regdep",
+        |info_path, entries| {
+            for (kind, path) in entries {
+                if *kind == 1 {
+                    panic!(
+                        "Did not expect package root relative path type: {:?} in {:?}",
+                        path, info_path
+                    );
+                }
+            }
+        },
+    );
+}
+
+#[cargo_test(nightly, reason = "-Z binary-dep-depinfo is unstable")]
+fn canonical_path() {
+    if !cargo_test_support::symlink_supported() {
+        return;
+    }
+    Package::new("regdep", "0.1.0")
+        .file("src/lib.rs", "pub fn f() {}")
+        .publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            [package]
+            name = "foo"
+            version = "0.1.0"
+
+            [dependencies]
+            regdep = "0.1"
+            "#,
+        )
+        .file("src/lib.rs", "pub fn f() { regdep::f(); }")
+        .build();
+
+    let real = p.root().join("real_target");
+    real.mkdir_p();
+    p.symlink(real, "target");
+
+    p.cargo("check -Z binary-dep-depinfo")
+        .masquerade_as_nightly_cargo(&["binary-dep-depinfo"])
+        .run();
+
+    assert_deps_contains(
+        &p,
+        "target/debug/.fingerprint/foo-*/dep-lib-foo",
+        &[(0, "src/lib.rs"), (1, "debug/deps/libregdep-*.rmeta")],
+    );
+}
+
+#[cargo_test]
+fn non_local_build_script() {
+    // Non-local build script information is not included.
+    Package::new("bar", "1.0.0")
+        .file(
+            "build.rs",
+            r#"
+                fn main() {
+                    println!("cargo:rerun-if-changed=build.rs");
+                }
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .publish();
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.1.0"
+
+                [dependencies]
+                bar = "1.0"
+            "#,
+        )
+        .file("src/main.rs", "fn main() {}")
+        .build();
+
+    p.cargo("build").run();
+    let contents = p.read_file("target/debug/foo.d");
+    assert_match_exact(
+        "[ROOT]/foo/target/debug/foo[EXE]: [ROOT]/foo/src/main.rs",
+        &contents,
+    );
+}