Remove credential providers from bootstrap

since they are now built-in to the Cargo binary

src/bootstrap/dist.rs

@@ -1085,13 +1085,6 @@ fn run(self, builder: &Builder<'_>) -> Option<GeneratedTarball> {
         tarball.add_dir(etc.join("man"), "share/man/man1");
         tarball.add_legal_and_readme_to("share/doc/cargo");
 
-        for dirent in fs::read_dir(cargo.parent().unwrap()).expect("read_dir") {
-            let dirent = dirent.expect("read dir entry");
-            if dirent.file_name().to_str().expect("utf8").starts_with("cargo-credential-") {
-                tarball.add_file(&dirent.path(), "libexec", 0o755);
-            }
-        }
-
         Some(tarball.generate())
     }
 }

src/bootstrap/doc.rs

@@ -894,19 +894,10 @@ fn run(self, builder: &Builder<'_>) {
         "-p",
         "cargo-credential",
         "-p",
-        "cargo-credential-1password",
-        "-p",
         "mdman",
         // FIXME: this trips a license check in tidy.
         // "-p",
         // "resolver-tests",
-        // FIXME: we should probably document these, but they're different per-platform so we can't use `tool_doc`.
-        // "-p",
-        // "cargo-credential-gnome-secret",
-        // "-p",
-        // "cargo-credential-macos-keychain",
-        // "-p",
-        // "cargo-credential-wincred",
     ]
 );
 tool_doc!(Tidy, "tidy", "src/tools/tidy", rustc_tool = false, ["-p", "tidy"]);

src/bootstrap/tool.rs

@@ -558,39 +558,6 @@ fn run(self, builder: &Builder<'_>) -> PathBuf {
                 allow_features: "",
             })
             .expect("expected to build -- essential tool");
-
-        let build_cred = |name, path| {
-            // These credential helpers are currently experimental.
-            // Any build failures will be ignored.
-            let _ = builder.ensure(ToolBuild {
-                compiler: self.compiler,
-                target: self.target,
-                tool: name,
-                mode: Mode::ToolRustc,
-                path,
-                is_optional_tool: true,
-                source_type: SourceType::Submodule,
-                extra_features: Vec::new(),
-                allow_features: "",
-            });
-        };
-
-        if self.target.contains("windows") {
-            build_cred(
-                "cargo-credential-wincred",
-                "src/tools/cargo/credential/cargo-credential-wincred",
-            );
-        }
-        if self.target.contains("apple-darwin") {
-            build_cred(
-                "cargo-credential-macos-keychain",
-                "src/tools/cargo/credential/cargo-credential-macos-keychain",
-            );
-        }
-        build_cred(
-            "cargo-credential-1password",
-            "src/tools/cargo/credential/cargo-credential-1password",
-        );
         cargo_bin_path
     }
 }