1 files changed, 679 insertions, 0 deletions
diff --git a/compiler/rustc_metadata/src/errors.rs b/compiler/rustc_metadata/src/errors.rs
new file mode 100644
index 000000000..7d63fad32
--- /dev/null
+++ b/compiler/rustc_metadata/src/errors.rs
@@ -0,0 +1,679 @@
+use std::{
+    io::Error,
+    path::{Path, PathBuf},
+};
+
+use rustc_errors::{error_code, ErrorGuaranteed};
+use rustc_macros::SessionDiagnostic;
+use rustc_session::{config, SessionDiagnostic};
+use rustc_span::{sym, Span, Symbol};
+use rustc_target::spec::{PanicStrategy, TargetTriple};
+
+use crate::locator::CrateFlavor;
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::rlib_required)]
+pub struct RlibRequired {
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::lib_required)]
+pub struct LibRequired<'a> {
+    pub crate_name: Symbol,
+    pub kind: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::crate_dep_multiple)]
+#[help]
+pub struct CrateDepMultiple {
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::two_panic_runtimes)]
+pub struct TwoPanicRuntimes {
+    pub prev_name: Symbol,
+    pub cur_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::bad_panic_strategy)]
+pub struct BadPanicStrategy {
+    pub runtime: Symbol,
+    pub strategy: PanicStrategy,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::required_panic_strategy)]
+pub struct RequiredPanicStrategy {
+    pub crate_name: Symbol,
+    pub found_strategy: PanicStrategy,
+    pub desired_strategy: PanicStrategy,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::incompatible_panic_in_drop_strategy)]
+pub struct IncompatiblePanicInDropStrategy {
+    pub crate_name: Symbol,
+    pub found_strategy: PanicStrategy,
+    pub desired_strategy: PanicStrategy,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_names_in_link)]
+pub struct MultipleNamesInLink {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_kinds_in_link)]
+pub struct MultipleKindsInLink {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_name_form)]
+pub struct LinkNameForm {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_kind_form)]
+pub struct LinkKindForm {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_modifiers_form)]
+pub struct LinkModifiersForm {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_cfg_form)]
+pub struct LinkCfgForm {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::wasm_import_form)]
+pub struct WasmImportForm {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::empty_link_name, code = "E0454")]
+pub struct EmptyLinkName {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_framework_apple, code = "E0455")]
+pub struct LinkFrameworkApple {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::framework_only_windows, code = "E0455")]
+pub struct FrameworkOnlyWindows {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::unknown_link_kind, code = "E0458")]
+pub struct UnknownLinkKind<'a> {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+    pub kind: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_link_modifiers)]
+pub struct MultipleLinkModifiers {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_cfgs)]
+pub struct MultipleCfgs {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_cfg_single_predicate)]
+pub struct LinkCfgSinglePredicate {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_wasm_import)]
+pub struct MultipleWasmImport {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::unexpected_link_arg)]
+pub struct UnexpectedLinkArg {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::invalid_link_modifier)]
+pub struct InvalidLinkModifier {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_modifiers)]
+pub struct MultipleModifiers<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub modifier: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::bundle_needs_static)]
+pub struct BundleNeedsStatic {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::whole_archive_needs_static)]
+pub struct WholeArchiveNeedsStatic {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::as_needed_compatibility)]
+pub struct AsNeededCompatibility {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::unknown_link_modifier)]
+pub struct UnknownLinkModifier<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub modifier: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::incompatible_wasm_link)]
+pub struct IncompatibleWasmLink {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_requires_name, code = "E0459")]
+pub struct LinkRequiresName {
+    #[primary_span]
+    #[label]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::raw_dylib_no_nul)]
+pub struct RawDylibNoNul {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::link_ordinal_raw_dylib)]
+pub struct LinkOrdinalRawDylib {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::lib_framework_apple)]
+pub struct LibFrameworkApple;
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::empty_renaming_target)]
+pub struct EmptyRenamingTarget<'a> {
+    pub lib_name: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::renaming_no_link)]
+pub struct RenamingNoLink<'a> {
+    pub lib_name: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_renamings)]
+pub struct MultipleRenamings<'a> {
+    pub lib_name: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::no_link_mod_override)]
+pub struct NoLinkModOverride {
+    #[primary_span]
+    pub span: Option<Span>,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::unsupported_abi_i686)]
+pub struct UnsupportedAbiI686 {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::unsupported_abi)]
+pub struct UnsupportedAbi {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::fail_create_file_encoder)]
+pub struct FailCreateFileEncoder {
+    pub err: Error,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::fail_seek_file)]
+pub struct FailSeekFile {
+    pub err: Error,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::fail_write_file)]
+pub struct FailWriteFile {
+    pub err: Error,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::crate_not_panic_runtime)]
+pub struct CrateNotPanicRuntime {
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::no_panic_strategy)]
+pub struct NoPanicStrategy {
+    pub crate_name: Symbol,
+    pub strategy: PanicStrategy,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::profiler_builtins_needs_core)]
+pub struct ProfilerBuiltinsNeedsCore;
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::not_profiler_runtime)]
+pub struct NotProfilerRuntime {
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::no_multiple_global_alloc)]
+pub struct NoMultipleGlobalAlloc {
+    #[primary_span]
+    #[label]
+    pub span2: Span,
+    #[label(metadata::prev_global_alloc)]
+    pub span1: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::conflicting_global_alloc)]
+pub struct ConflictingGlobalAlloc {
+    pub crate_name: Symbol,
+    pub other_crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::global_alloc_required)]
+pub struct GlobalAllocRequired;
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::no_transitive_needs_dep)]
+pub struct NoTransitiveNeedsDep<'a> {
+    pub crate_name: Symbol,
+    pub needs_crate_name: &'a str,
+    pub deps_crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::failed_write_error)]
+pub struct FailedWriteError {
+    pub filename: PathBuf,
+    pub err: Error,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::missing_native_library)]
+pub struct MissingNativeLibrary<'a> {
+    pub libname: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::failed_create_tempdir)]
+pub struct FailedCreateTempdir {
+    pub err: Error,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::failed_create_file)]
+pub struct FailedCreateFile<'a> {
+    pub filename: &'a Path,
+    pub err: Error,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::failed_create_encoded_metadata)]
+pub struct FailedCreateEncodedMetadata {
+    pub err: Error,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::non_ascii_name)]
+pub struct NonAsciiName {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::extern_location_not_exist)]
+pub struct ExternLocationNotExist<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub location: &'a Path,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::extern_location_not_file)]
+pub struct ExternLocationNotFile<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub location: &'a Path,
+}
+
+pub(crate) struct MultipleCandidates {
+    pub span: Span,
+    pub flavor: CrateFlavor,
+    pub crate_name: Symbol,
+    pub candidates: Vec<PathBuf>,
+}
+
+impl SessionDiagnostic<'_> for MultipleCandidates {
+    fn into_diagnostic(
+        self,
+        handler: &'_ rustc_errors::Handler,
+    ) -> rustc_errors::DiagnosticBuilder<'_, ErrorGuaranteed> {
+        let mut diag = handler.struct_err(rustc_errors::fluent::metadata::multiple_candidates);
+        diag.set_arg("crate_name", self.crate_name);
+        diag.set_arg("flavor", self.flavor);
+        diag.code(error_code!(E0465));
+        diag.set_span(self.span);
+        for (i, candidate) in self.candidates.iter().enumerate() {
+            diag.span_note(self.span, &format!("candidate #{}: {}", i + 1, candidate.display()));
+        }
+        diag
+    }
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_matching_crates, code = "E0464")]
+#[note]
+pub struct MultipleMatchingCrates {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub candidates: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::symbol_conflicts_current, code = "E0519")]
+pub struct SymbolConflictsCurrent {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::symbol_conflicts_others, code = "E0523")]
+pub struct SymbolConflictsOthers {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::stable_crate_id_collision)]
+pub struct StableCrateIdCollision {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name0: Symbol,
+    pub crate_name1: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::dl_error)]
+pub struct DlError {
+    #[primary_span]
+    pub span: Span,
+    pub err: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::newer_crate_version, code = "E0460")]
+#[note]
+#[note(metadata::found_crate_versions)]
+pub struct NewerCrateVersion {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub add_info: String,
+    pub found_crates: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::no_crate_with_triple, code = "E0461")]
+#[note(metadata::found_crate_versions)]
+pub struct NoCrateWithTriple<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub locator_triple: &'a str,
+    pub add_info: String,
+    pub found_crates: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::found_staticlib, code = "E0462")]
+#[note(metadata::found_crate_versions)]
+#[help]
+pub struct FoundStaticlib {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub add_info: String,
+    pub found_crates: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::incompatible_rustc, code = "E0514")]
+#[note(metadata::found_crate_versions)]
+#[help]
+pub struct IncompatibleRustc {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub add_info: String,
+    pub found_crates: String,
+    pub rustc_version: String,
+}
+
+pub struct InvalidMetadataFiles {
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub add_info: String,
+    pub crate_rejections: Vec<String>,
+}
+
+impl SessionDiagnostic<'_> for InvalidMetadataFiles {
+    fn into_diagnostic(
+        self,
+        handler: &'_ rustc_errors::Handler,
+    ) -> rustc_errors::DiagnosticBuilder<'_, ErrorGuaranteed> {
+        let mut diag = handler.struct_err(rustc_errors::fluent::metadata::invalid_meta_files);
+        diag.set_arg("crate_name", self.crate_name);
+        diag.set_arg("add_info", self.add_info);
+        diag.code(error_code!(E0786));
+        diag.set_span(self.span);
+        for crate_rejection in self.crate_rejections {
+            diag.note(crate_rejection);
+        }
+        diag
+    }
+}
+
+pub struct CannotFindCrate {
+    pub span: Span,
+    pub crate_name: Symbol,
+    pub add_info: String,
+    pub missing_core: bool,
+    pub current_crate: String,
+    pub is_nightly_build: bool,
+    pub profiler_runtime: Symbol,
+    pub locator_triple: TargetTriple,
+}
+
+impl SessionDiagnostic<'_> for CannotFindCrate {
+    fn into_diagnostic(
+        self,
+        handler: &'_ rustc_errors::Handler,
+    ) -> rustc_errors::DiagnosticBuilder<'_, ErrorGuaranteed> {
+        let mut diag = handler.struct_err(rustc_errors::fluent::metadata::cannot_find_crate);
+        diag.set_arg("crate_name", self.crate_name);
+        diag.set_arg("current_crate", self.current_crate);
+        diag.set_arg("add_info", self.add_info);
+        diag.set_arg("locator_triple", self.locator_triple.triple());
+        diag.code(error_code!(E0463));
+        diag.set_span(self.span);
+        if (self.crate_name == sym::std || self.crate_name == sym::core)
+            && self.locator_triple != TargetTriple::from_triple(config::host_triple())
+        {
+            if self.missing_core {
+                diag.note(rustc_errors::fluent::metadata::target_not_installed);
+            } else {
+                diag.note(rustc_errors::fluent::metadata::target_no_std_support);
+            }
+            // NOTE: this suggests using rustup, even though the user may not have it installed.
+            // That's because they could choose to install it; or this may give them a hint which
+            // target they need to install from their distro.
+            if self.missing_core {
+                diag.help(rustc_errors::fluent::metadata::consider_downloading_target);
+            }
+            // Suggest using #![no_std]. #[no_core] is unstable and not really supported anyway.
+            // NOTE: this is a dummy span if `extern crate std` was injected by the compiler.
+            // If it's not a dummy, that means someone added `extern crate std` explicitly and
+            // `#![no_std]` won't help.
+            if !self.missing_core && self.span.is_dummy() {
+                diag.note(rustc_errors::fluent::metadata::std_required);
+            }
+            if self.is_nightly_build {
+                diag.help(rustc_errors::fluent::metadata::consider_building_std);
+            }
+        } else if self.crate_name == self.profiler_runtime {
+            diag.note(rustc_errors::fluent::metadata::compiler_missing_profiler);
+        } else if self.crate_name.as_str().starts_with("rustc_") {
+            diag.help(rustc_errors::fluent::metadata::install_missing_components);
+        }
+        diag.span_label(self.span, rustc_errors::fluent::metadata::cant_find_crate);
+        diag
+    }
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::no_dylib_plugin, code = "E0457")]
+pub struct NoDylibPlugin {
+    #[primary_span]
+    pub span: Span,
+    pub crate_name: Symbol,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::crate_location_unknown_type)]
+pub struct CrateLocationUnknownType<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub path: &'a Path,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::lib_filename_form)]
+pub struct LibFilenameForm<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub dll_prefix: &'a str,
+    pub dll_suffix: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::multiple_import_name_type)]
+pub struct MultipleImportNameType {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::import_name_type_form)]
+pub struct ImportNameTypeForm {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::import_name_type_x86)]
+pub struct ImportNameTypeX86 {
+    #[primary_span]
+    pub span: Span,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::unknown_import_name_type)]
+pub struct UnknownImportNameType<'a> {
+    #[primary_span]
+    pub span: Span,
+    pub import_name_type: &'a str,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::import_name_type_raw)]
+pub struct ImportNameTypeRaw {
+    #[primary_span]
+    pub span: Span,
+}