set up rustc_metadata for SessionDiagnostics, port dependency_format.rs

compiler/rustc_error_messages/locales/en-US/metadata.ftl

@@ -0,0 +1,21 @@
+metadata_rlib_required =
+    crate `{$crate_name}` required to be available in rlib format, but was not found in this form
+
+metadata_lib_required =
+    crate `{$crate_name}` required to be available in {$kind} format, but was not found in this form
+
+metadata_crate_dep_multiple =
+    cannot satisfy dependencies so `{$crate_name}` only shows up once
+    .help = having upstream crates all available in one format will likely make this go away
+
+metadata_two_panic_runtimes =
+    cannot link together two panic runtimes: {$prev_name} and {$cur_name}
+
+metadata_bad_panic_strategy =
+    the linked panic runtime `{$runtime}` is not compiled with this crate's panic strategy `{$strategy}`
+
+metadata_required_panic_strategy =
+    the crate `{$crate_name}` requires panic strategy `{$found_strategy}` which is incompatible with this crate's strategy of `{$desired_strategy}`
+
+metadata_incompatible_panic_in_drop_strategy =
+    the crate `{$crate_name}` is compiled with the panic-in-drop strategy `{$found_strategy}` which is incompatible with this crate's strategy of `{$desired_strategy}`

compiler/rustc_error_messages/src/lib.rs

@@ -46,6 +46,7 @@ fluent_messages! {
     infer => "../locales/en-US/infer.ftl",
     lint => "../locales/en-US/lint.ftl",
     monomorphize => "../locales/en-US/monomorphize.ftl",
+    metadata => "../locales/en-US/metadata.ftl",
     parser => "../locales/en-US/parser.ftl",
     passes => "../locales/en-US/passes.ftl",
     plugin_impl => "../locales/en-US/plugin_impl.ftl",

compiler/rustc_metadata/src/dependency_format.rs

@@ -52,6 +52,10 @@
 //! than finding a number of solutions (there are normally quite a few).
 
 use crate::creader::CStore;
+use crate::errors::{
+    BadPanicStrategy, CrateDepMultiple, IncompatiblePanicInDropStrategy, LibRequired,
+    RequiredPanicStrategy, RlibRequired, TwoPanicRuntimes,
+};
 
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def_id::CrateNum;
@@ -136,11 +140,7 @@ fn calculate_type(tcx: TyCtxt<'_>, ty: CrateType) -> DependencyList {
                 if src.rlib.is_some() {
                     continue;
                 }
-                sess.err(&format!(
-                    "crate `{}` required to be available in rlib format, \
-                                   but was not found in this form",
-                    tcx.crate_name(cnum)
-                ));
+                sess.emit_err(RlibRequired { crate_name: tcx.crate_name(cnum).to_string() });
             }
             return Vec::new();
         }
@@ -224,12 +224,10 @@ fn calculate_type(tcx: TyCtxt<'_>, ty: CrateType) -> DependencyList {
                     Linkage::Static => "rlib",
                     _ => "dylib",
                 };
-                sess.err(&format!(
-                    "crate `{}` required to be available in {} format, \
-                                   but was not found in this form",
-                    tcx.crate_name(cnum),
-                    kind
-                ));
+                sess.emit_err(LibRequired {
+                    crate_name: tcx.crate_name(cnum).to_string(),
+                    kind: kind.to_string(),
+                });
             }
         }
     }
@@ -254,16 +252,7 @@ fn add_library(
             // can be refined over time.
             if link2 != link || link == RequireStatic {
                 tcx.sess
-                    .struct_err(&format!(
-                        "cannot satisfy dependencies so `{}` only \
-                                              shows up once",
-                        tcx.crate_name(cnum)
-                    ))
-                    .help(
-                        "having upstream crates all available in one format \
-                           will likely make this go away",
-                    )
-                    .emit();
+                    .emit_err(CrateDepMultiple { crate_name: tcx.crate_name(cnum).to_string() });
             }
         }
         None => {
@@ -358,13 +347,9 @@ fn verify_ok(tcx: TyCtxt<'_>, list: &[Linkage]) {
 
         if tcx.is_panic_runtime(cnum) {
             if let Some((prev, _)) = panic_runtime {
-                let prev_name = tcx.crate_name(prev);
-                let cur_name = tcx.crate_name(cnum);
-                sess.err(&format!(
-                    "cannot link together two \
-                                   panic runtimes: {} and {}",
-                    prev_name, cur_name
-                ));
+                let prev_name = tcx.crate_name(prev).to_string();
+                let cur_name = tcx.crate_name(cnum).to_string();
+                sess.emit_err(TwoPanicRuntimes { prev_name, cur_name });
             }
             panic_runtime = Some((
                 cnum,
@@ -384,13 +369,10 @@ fn verify_ok(tcx: TyCtxt<'_>, list: &[Linkage]) {
         // First up, validate that our selected panic runtime is indeed exactly
         // our same strategy.
         if found_strategy != desired_strategy {
-            sess.err(&format!(
-                "the linked panic runtime `{}` is \
-                               not compiled with this crate's \
-                               panic strategy `{}`",
-                tcx.crate_name(runtime_cnum),
-                desired_strategy.desc()
-            ));
+            sess.emit_err(BadPanicStrategy {
+                runtime: tcx.crate_name(runtime_cnum).to_string(),
+                strategy: desired_strategy.desc().to_string(),
+            });
         }
 
         // Next up, verify that all other crates are compatible with this panic
@@ -407,28 +389,19 @@ fn verify_ok(tcx: TyCtxt<'_>, list: &[Linkage]) {
             }
 
             if let Some(found_strategy) = tcx.required_panic_strategy(cnum) && desired_strategy != found_strategy {
-                sess.err(&format!(
-                    "the crate `{}` requires \
-                               panic strategy `{}` which is \
-                               incompatible with this crate's \
-                               strategy of `{}`",
-                    tcx.crate_name(cnum),
-                    found_strategy.desc(),
-                    desired_strategy.desc()
-                ));
+                sess.emit_err(RequiredPanicStrategy {
+                    crate_name: tcx.crate_name(cnum).to_string(),
+                    found_strategy: found_strategy.desc().to_string(),
+                    desired_strategy: desired_strategy.desc().to_string() });
             }
 
             let found_drop_strategy = tcx.panic_in_drop_strategy(cnum);
             if tcx.sess.opts.unstable_opts.panic_in_drop != found_drop_strategy {
-                sess.err(&format!(
-                    "the crate `{}` is compiled with the \
-                               panic-in-drop strategy `{}` which is \
-                               incompatible with this crate's \
-                               strategy of `{}`",
-                    tcx.crate_name(cnum),
-                    found_drop_strategy.desc(),
-                    tcx.sess.opts.unstable_opts.panic_in_drop.desc()
-                ));
+                sess.emit_err(IncompatiblePanicInDropStrategy {
+                    crate_name: tcx.crate_name(cnum).to_string(),
+                    found_strategy: found_drop_strategy.desc().to_string(),
+                    desired_strategy: tcx.sess.opts.unstable_opts.panic_in_drop.desc().to_string(),
+                });
             }
         }
     }

compiler/rustc_metadata/src/errors.rs

@@ -0,0 +1,52 @@
+// use rustc_errors::ErrorGuaranteed;
+use rustc_macros::SessionDiagnostic;
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::rlib_required)]
+pub struct RlibRequired {
+    pub crate_name: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::lib_required)]
+pub struct LibRequired {
+    pub crate_name: String,
+    pub kind: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::crate_dep_multiple)]
+#[help]
+pub struct CrateDepMultiple {
+    pub crate_name: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::two_panic_runtimes)]
+pub struct TwoPanicRuntimes {
+    pub prev_name: String,
+    pub cur_name: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::bad_panic_strategy)]
+pub struct BadPanicStrategy {
+    pub runtime: String,
+    pub strategy: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::required_panic_strategy)]
+pub struct RequiredPanicStrategy {
+    pub crate_name: String,
+    pub found_strategy: String,
+    pub desired_strategy: String,
+}
+
+#[derive(SessionDiagnostic)]
+#[diag(metadata::incompatible_panic_in_drop_strategy)]
+pub struct IncompatiblePanicInDropStrategy {
+    pub crate_name: String,
+    pub found_strategy: String,
+    pub desired_strategy: String,
+}

compiler/rustc_metadata/src/lib.rs

@@ -16,6 +16,8 @@
 #![feature(never_type)]
 #![recursion_limit = "256"]
 #![allow(rustc::potential_query_instability)]
+#![deny(rustc::untranslatable_diagnostic)]
+#![deny(rustc::diagnostic_outside_of_impl)]
 
 extern crate proc_macro;
 
@@ -34,6 +36,7 @@ mod native_libs;
 mod rmeta;
 
 pub mod creader;
+pub mod errors;
 pub mod fs;
 pub mod locator;