5 files changed, 0 insertions, 153 deletions
diff --git a/compiler/rustc_plugin_impl/Cargo.toml b/compiler/rustc_plugin_impl/Cargo.toml
deleted file mode 100644
index a0762e815e3..00000000000
--- a/compiler/rustc_plugin_impl/Cargo.toml
+++ /dev/null
@@ -1,18 +0,0 @@
-[package]
-name = "rustc_plugin_impl"
-version = "0.0.0"
-build = false
-edition = "2021"
-
-[dependencies]
-# tidy-alphabetical-start
-libloading = "0.7.1"
-rustc_ast = { path = "../rustc_ast" }
-rustc_errors = { path = "../rustc_errors" }
-rustc_fluent_macro = { path = "../rustc_fluent_macro" }
-rustc_lint = { path = "../rustc_lint" }
-rustc_macros = { path = "../rustc_macros" }
-rustc_metadata = { path = "../rustc_metadata" }
-rustc_session = { path = "../rustc_session" }
-rustc_span = { path = "../rustc_span" }
-# tidy-alphabetical-end
diff --git a/compiler/rustc_plugin_impl/messages.ftl b/compiler/rustc_plugin_impl/messages.ftl
deleted file mode 100644
index 8db32a42c1d..00000000000
--- a/compiler/rustc_plugin_impl/messages.ftl
+++ /dev/null
@@ -1,4 +0,0 @@
-plugin_impl_load_plugin_error = {$msg}
-
-plugin_impl_malformed_plugin_attribute = malformed `plugin` attribute
-    .label = malformed attribute
diff --git a/compiler/rustc_plugin_impl/src/errors.rs b/compiler/rustc_plugin_impl/src/errors.rs
deleted file mode 100644
index e6a7fc86bee..00000000000
--- a/compiler/rustc_plugin_impl/src/errors.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-//! Errors emitted by plugin_impl
-
-use rustc_macros::Diagnostic;
-use rustc_span::Span;
-
-#[derive(Diagnostic)]
-#[diag(plugin_impl_load_plugin_error)]
-pub struct LoadPluginError {
-    #[primary_span]
-    pub span: Span,
-    pub msg: String,
-}
-
-#[derive(Diagnostic)]
-#[diag(plugin_impl_malformed_plugin_attribute, code = "E0498")]
-pub struct MalformedPluginAttribute {
-    #[primary_span]
-    #[label]
-    pub span: Span,
-}
diff --git a/compiler/rustc_plugin_impl/src/lib.rs b/compiler/rustc_plugin_impl/src/lib.rs
deleted file mode 100644
index 0e1c80a1f64..00000000000
--- a/compiler/rustc_plugin_impl/src/lib.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-//! Infrastructure for compiler plugins.
-//!
-//! Plugins are a deprecated way to extend the behavior of `rustc` in various ways.
-//!
-//! See the [`plugin`
-//! feature](https://doc.rust-lang.org/nightly/unstable-book/language-features/plugin.html)
-//! of the Unstable Book for some examples.
-
-#![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![cfg_attr(not(bootstrap), doc(rust_logo))]
-#![cfg_attr(not(bootstrap), feature(rustdoc_internals))]
-#![cfg_attr(not(bootstrap), allow(internal_features))]
-#![recursion_limit = "256"]
-#![deny(rustc::untranslatable_diagnostic)]
-#![deny(rustc::diagnostic_outside_of_impl)]
-
-use rustc_errors::{DiagnosticMessage, SubdiagnosticMessage};
-use rustc_fluent_macro::fluent_messages;
-use rustc_lint::LintStore;
-
-mod errors;
-pub mod load;
-
-fluent_messages! { "../messages.ftl" }
-
-/// Structure used to register plugins.
-///
-/// A plugin registrar function takes an `&mut Registry` and should call
-/// methods to register its plugins.
-pub struct Registry<'a> {
-    /// The `LintStore` allows plugins to register new lints.
-    pub lint_store: &'a mut LintStore,
-}
diff --git a/compiler/rustc_plugin_impl/src/load.rs b/compiler/rustc_plugin_impl/src/load.rs
deleted file mode 100644
index 27e5cb9f0d0..00000000000
--- a/compiler/rustc_plugin_impl/src/load.rs
+++ /dev/null
@@ -1,78 +0,0 @@
-//! Used by `rustc` when loading a plugin.
-
-use crate::errors::{LoadPluginError, MalformedPluginAttribute};
-use crate::Registry;
-use libloading::Library;
-use rustc_ast::Attribute;
-use rustc_metadata::locator;
-use rustc_session::cstore::MetadataLoader;
-use rustc_session::Session;
-use rustc_span::symbol::{sym, Ident};
-
-use std::env;
-use std::mem;
-use std::path::PathBuf;
-
-/// Pointer to a registrar function.
-type PluginRegistrarFn = fn(&mut Registry<'_>);
-
-/// Read plugin metadata and dynamically load registrar functions.
-pub fn load_plugins(
-    sess: &Session,
-    metadata_loader: &dyn MetadataLoader,
-    attrs: &[Attribute],
-) -> Vec<PluginRegistrarFn> {
-    let mut plugins = Vec::new();
-
-    for attr in attrs {
-        if !attr.has_name(sym::plugin) {
-            continue;
-        }
-
-        for plugin in attr.meta_item_list().unwrap_or_default() {
-            match plugin.ident() {
-                Some(ident) if plugin.is_word() => {
-                    load_plugin(&mut plugins, sess, metadata_loader, ident)
-                }
-                _ => {
-                    sess.emit_err(MalformedPluginAttribute { span: plugin.span() });
-                }
-            }
-        }
-    }
-
-    plugins
-}
-
-fn load_plugin(
-    plugins: &mut Vec<PluginRegistrarFn>,
-    sess: &Session,
-    metadata_loader: &dyn MetadataLoader,
-    ident: Ident,
-) {
-    let lib = locator::find_plugin_registrar(sess, metadata_loader, ident.span, ident.name);
-    let fun = dylink_registrar(lib).unwrap_or_else(|err| {
-        // This is fatal: there are almost certainly macros we need inside this crate, so
-        // continuing would spew "macro undefined" errors.
-        sess.emit_fatal(LoadPluginError { span: ident.span, msg: err.to_string() });
-    });
-    plugins.push(fun);
-}
-
-/// Dynamically link a registrar function into the compiler process.
-fn dylink_registrar(lib_path: PathBuf) -> Result<PluginRegistrarFn, libloading::Error> {
-    // Make sure the path contains a / or the linker will search for it.
-    let lib_path = env::current_dir().unwrap().join(&lib_path);
-
-    let lib = unsafe { Library::new(&lib_path) }?;
-
-    let registrar_sym = unsafe { lib.get::<PluginRegistrarFn>(b"__rustc_plugin_registrar") }?;
-
-    // Intentionally leak the dynamic library. We can't ever unload it
-    // since the library can make things that will live arbitrarily long
-    // (e.g., an Rc cycle or a thread).
-    let registrar_sym = unsafe { registrar_sym.into_raw() };
-    mem::forget(lib);
-
-    Ok(*registrar_sym)
-}