Rollup merge of #107838 - estebank:terminal_hyperlinks, r=nagisa

Introduce `-Zterminal-urls` to use OSC8 for error codes

Terminals supporting the OSC8 Hyperlink Extension can support inline anchors where the text is user defineable but clicking on it opens a browser to a specified URLs, just like `<a href="URL">` does in HTML.

https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda

compiler/rustc_driver_impl/src/lib.rs

@@ -23,7 +23,7 @@ use rustc_codegen_ssa::{traits::CodegenBackend, CodegenErrors, CodegenResults};
 use rustc_data_structures::profiling::{get_resident_set_size, print_time_passes_entry};
 use rustc_data_structures::sync::SeqCst;
 use rustc_errors::registry::{InvalidErrorCode, Registry};
-use rustc_errors::{ErrorGuaranteed, PResult};
+use rustc_errors::{ErrorGuaranteed, PResult, TerminalUrl};
 use rustc_feature::find_gated_cfg;
 use rustc_hir::def_id::LOCAL_CRATE;
 use rustc_interface::util::{self, collect_crate_types, get_codegen_backend};
@@ -1191,6 +1191,7 @@ pub fn report_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) {
         None,
         false,
         false,
+        TerminalUrl::No,
     ));
     let handler = rustc_errors::Handler::with_emitter(true, None, emitter);
 

compiler/rustc_errors/src/emitter.rs

@@ -18,7 +18,7 @@ use crate::translation::{to_fluent_args, Translate};
 use crate::{
     diagnostic::DiagnosticLocation, CodeSuggestion, Diagnostic, DiagnosticId, DiagnosticMessage,
     FluentBundle, Handler, LazyFallbackBundle, Level, MultiSpan, SubDiagnostic,
-    SubstitutionHighlight, SuggestionStyle,
+    SubstitutionHighlight, SuggestionStyle, TerminalUrl,
 };
 use rustc_lint_defs::pluralize;
 
@@ -66,6 +66,7 @@ impl HumanReadableErrorType {
         diagnostic_width: Option<usize>,
         macro_backtrace: bool,
         track_diagnostics: bool,
+        terminal_url: TerminalUrl,
     ) -> EmitterWriter {
         let (short, color_config) = self.unzip();
         let color = color_config.suggests_using_colors();
@@ -80,6 +81,7 @@ impl HumanReadableErrorType {
             diagnostic_width,
             macro_backtrace,
             track_diagnostics,
+            terminal_url,
         )
     }
 }
@@ -652,6 +654,7 @@ pub struct EmitterWriter {
 
     macro_backtrace: bool,
     track_diagnostics: bool,
+    terminal_url: TerminalUrl,
 }
 
 #[derive(Debug)]
@@ -672,6 +675,7 @@ impl EmitterWriter {
         diagnostic_width: Option<usize>,
         macro_backtrace: bool,
         track_diagnostics: bool,
+        terminal_url: TerminalUrl,
     ) -> EmitterWriter {
         let dst = Destination::from_stderr(color_config);
         EmitterWriter {
@@ -685,6 +689,7 @@ impl EmitterWriter {
             diagnostic_width,
             macro_backtrace,
             track_diagnostics,
+            terminal_url,
         }
     }
 
@@ -699,6 +704,7 @@ impl EmitterWriter {
         diagnostic_width: Option<usize>,
         macro_backtrace: bool,
         track_diagnostics: bool,
+        terminal_url: TerminalUrl,
     ) -> EmitterWriter {
         EmitterWriter {
             dst: Raw(dst, colored),
@@ -711,6 +717,7 @@ impl EmitterWriter {
             diagnostic_width,
             macro_backtrace,
             track_diagnostics,
+            terminal_url,
         }
     }
 
@@ -1378,7 +1385,13 @@ impl EmitterWriter {
             // only render error codes, not lint codes
             if let Some(DiagnosticId::Error(ref code)) = *code {
                 buffer.append(0, "[", Style::Level(*level));
-                buffer.append(0, code, Style::Level(*level));
+                let code = if let TerminalUrl::Yes = self.terminal_url {
+                    let path = "https://doc.rust-lang.org/error_codes";
+                    format!("\x1b]8;;{path}/{code}.html\x07{code}\x1b]8;;\x07")
+                } else {
+                    code.clone()
+                };
+                buffer.append(0, &code, Style::Level(*level));
                 buffer.append(0, "]", Style::Level(*level));
                 label_width += 2 + code.len();
             }

compiler/rustc_errors/src/json.rs

@@ -17,6 +17,7 @@ use crate::translation::{to_fluent_args, Translate};
 use crate::DiagnosticId;
 use crate::{
     CodeSuggestion, FluentBundle, LazyFallbackBundle, MultiSpan, SpanLabel, SubDiagnostic,
+    TerminalUrl,
 };
 use rustc_lint_defs::Applicability;
 
@@ -47,6 +48,7 @@ pub struct JsonEmitter {
     diagnostic_width: Option<usize>,
     macro_backtrace: bool,
     track_diagnostics: bool,
+    terminal_url: TerminalUrl,
 }
 
 impl JsonEmitter {
@@ -60,6 +62,7 @@ impl JsonEmitter {
         diagnostic_width: Option<usize>,
         macro_backtrace: bool,
         track_diagnostics: bool,
+        terminal_url: TerminalUrl,
     ) -> JsonEmitter {
         JsonEmitter {
             dst: Box::new(io::BufWriter::new(io::stderr())),
@@ -73,6 +76,7 @@ impl JsonEmitter {
             diagnostic_width,
             macro_backtrace,
             track_diagnostics,
+            terminal_url,
         }
     }
 
@@ -84,6 +88,7 @@ impl JsonEmitter {
         diagnostic_width: Option<usize>,
         macro_backtrace: bool,
         track_diagnostics: bool,
+        terminal_url: TerminalUrl,
     ) -> JsonEmitter {
         let file_path_mapping = FilePathMapping::empty();
         JsonEmitter::stderr(
@@ -96,6 +101,7 @@ impl JsonEmitter {
             diagnostic_width,
             macro_backtrace,
             track_diagnostics,
+            terminal_url,
         )
     }
 
@@ -110,6 +116,7 @@ impl JsonEmitter {
         diagnostic_width: Option<usize>,
         macro_backtrace: bool,
         track_diagnostics: bool,
+        terminal_url: TerminalUrl,
     ) -> JsonEmitter {
         JsonEmitter {
             dst,
@@ -123,6 +130,7 @@ impl JsonEmitter {
             diagnostic_width,
             macro_backtrace,
             track_diagnostics,
+            terminal_url,
         }
     }
 
@@ -360,6 +368,7 @@ impl Diagnostic {
                 je.diagnostic_width,
                 je.macro_backtrace,
                 je.track_diagnostics,
+                je.terminal_url,
             )
             .ui_testing(je.ui_testing)
             .emit_diagnostic(diag);

compiler/rustc_errors/src/json/tests.rs

@@ -4,7 +4,7 @@ use crate::json::JsonEmitter;
 use rustc_span::source_map::{FilePathMapping, SourceMap};
 
 use crate::emitter::{ColorConfig, HumanReadableErrorType};
-use crate::Handler;
+use crate::{Handler, TerminalUrl};
 use rustc_span::{BytePos, Span};
 
 use std::str;
@@ -60,6 +60,7 @@ fn test_positions(code: &str, span: (u32, u32), expected_output: SpanTestData) {
             None,
             false,
             false,
+            TerminalUrl::No,
         );
 
         let span = Span::with_root_ctxt(BytePos(span.0), BytePos(span.1));

compiler/rustc_errors/src/lib.rs

@@ -573,6 +573,7 @@ impl Handler {
             None,
             flags.macro_backtrace,
             flags.track_diagnostics,
+            TerminalUrl::No,
         ));
         Self::with_emitter_and_flags(emitter, flags)
     }
@@ -1838,6 +1839,13 @@ pub fn add_elided_lifetime_in_path_suggestion(
     );
 }
 
+#[derive(Clone, Copy, PartialEq, Hash, Debug)]
+pub enum TerminalUrl {
+    No,
+    Yes,
+    Auto,
+}
+
 /// Useful type to use with `Result<>` indicate that an error has already
 /// been reported to the user, so no need to continue checking.
 #[derive(Clone, Copy, Debug, Encodable, Decodable, Hash, PartialEq, Eq, PartialOrd, Ord)]

compiler/rustc_expand/src/tests.rs

@@ -8,7 +8,7 @@ use rustc_span::{BytePos, Span};
 
 use rustc_data_structures::sync::Lrc;
 use rustc_errors::emitter::EmitterWriter;
-use rustc_errors::{Handler, MultiSpan, PResult};
+use rustc_errors::{Handler, MultiSpan, PResult, TerminalUrl};
 
 use std::io;
 use std::io::prelude::*;
@@ -152,6 +152,7 @@ fn test_harness(file_text: &str, span_labels: Vec<SpanLabel>, expected_output: &
             None,
             false,
             false,
+            TerminalUrl::No,
         );
         let handler = Handler::with_emitter(true, None, Box::new(emitter));
         #[allow(rustc::untranslatable_diagnostic)]

compiler/rustc_session/src/options.rs

@@ -4,7 +4,7 @@ use crate::early_error;
 use crate::lint;
 use crate::search_paths::SearchPath;
 use crate::utils::NativeLib;
-use rustc_errors::LanguageIdentifier;
+use rustc_errors::{LanguageIdentifier, TerminalUrl};
 use rustc_target::spec::{CodeModel, LinkerFlavorCli, MergeFunctions, PanicStrategy, SanitizerSet};
 use rustc_target::spec::{
     RelocModel, RelroLevel, SplitDebuginfo, StackProtector, TargetTriple, TlsModel,
@@ -402,6 +402,8 @@ mod desc {
     pub const parse_code_model: &str = "one of supported code models (`rustc --print code-models`)";
     pub const parse_tls_model: &str = "one of supported TLS models (`rustc --print tls-models`)";
     pub const parse_target_feature: &str = parse_string;
+    pub const parse_terminal_url: &str =
+        "either a boolean (`yes`, `no`, `on`, `off`, etc), or `auto`";
     pub const parse_wasi_exec_model: &str = "either `command` or `reactor`";
     pub const parse_split_debuginfo: &str =
         "one of supported split-debuginfo modes (`off`, `packed`, or `unpacked`)";
@@ -1044,6 +1046,16 @@ mod parse {
         true
     }
 
+    pub(crate) fn parse_terminal_url(slot: &mut TerminalUrl, v: Option<&str>) -> bool {
+        *slot = match v {
+            Some("on" | "" | "yes" | "y") | None => TerminalUrl::Yes,
+            Some("off" | "no" | "n") => TerminalUrl::No,
+            Some("auto") => TerminalUrl::Auto,
+            _ => return false,
+        };
+        true
+    }
+
     pub(crate) fn parse_symbol_mangling_version(
         slot: &mut Option<SymbolManglingVersion>,
         v: Option<&str>,
@@ -1675,6 +1687,8 @@ options! {
         "show extended diagnostic help (default: no)"),
     temps_dir: Option<String> = (None, parse_opt_string, [UNTRACKED],
         "the directory the intermediate files are written to"),
+    terminal_urls: TerminalUrl = (TerminalUrl::No, parse_terminal_url, [UNTRACKED],
+        "use the OSC 8 hyperlink terminal specification to print hyperlinks in the compiler output"),
     #[rustc_lint_opt_deny_field_access("use `Session::lto` instead of this field")]
     thinlto: Option<bool> = (None, parse_opt_bool, [TRACKED],
         "enable ThinLTO when possible"),

compiler/rustc_session/src/session.rs

@@ -24,6 +24,7 @@ use rustc_errors::registry::Registry;
 use rustc_errors::{
     error_code, fallback_fluent_bundle, DiagnosticBuilder, DiagnosticId, DiagnosticMessage,
     ErrorGuaranteed, FluentBundle, IntoDiagnostic, LazyFallbackBundle, MultiSpan, Noted,
+    TerminalUrl,
 };
 use rustc_macros::HashStable_Generic;
 pub use rustc_span::def_id::StableCrateId;
@@ -1273,6 +1274,19 @@ fn default_emitter(
 ) -> Box<dyn Emitter + sync::Send> {
     let macro_backtrace = sopts.unstable_opts.macro_backtrace;
     let track_diagnostics = sopts.unstable_opts.track_diagnostics;
+    let terminal_url = match sopts.unstable_opts.terminal_urls {
+        TerminalUrl::Auto => {
+            match (std::env::var("COLORTERM").as_deref(), std::env::var("TERM").as_deref()) {
+                (Ok("truecolor"), Ok("xterm-256color"))
+                    if sopts.unstable_features.is_nightly_build() =>
+                {
+                    TerminalUrl::Yes
+                }
+                _ => TerminalUrl::No,
+            }
+        }
+        t => t,
+    };
     match sopts.error_format {
         config::ErrorOutputType::HumanReadable(kind) => {
             let (short, color_config) = kind.unzip();
@@ -1297,6 +1311,7 @@ fn default_emitter(
                     sopts.diagnostic_width,
                     macro_backtrace,
                     track_diagnostics,
+                    terminal_url,
                 );
                 Box::new(emitter.ui_testing(sopts.unstable_opts.ui_testing))
             }
@@ -1312,6 +1327,7 @@ fn default_emitter(
                 sopts.diagnostic_width,
                 macro_backtrace,
                 track_diagnostics,
+                terminal_url,
             )
             .ui_testing(sopts.unstable_opts.ui_testing),
         ),
@@ -1628,6 +1644,7 @@ fn early_error_handler(output: config::ErrorOutputType) -> rustc_errors::Handler
                 None,
                 false,
                 false,
+                TerminalUrl::No,
             ))
         }
         config::ErrorOutputType::Json { pretty, json_rendered } => Box::new(JsonEmitter::basic(
@@ -1638,6 +1655,7 @@ fn early_error_handler(output: config::ErrorOutputType) -> rustc_errors::Handler
             None,
             false,
             false,
+            TerminalUrl::No,
         )),
     };
     rustc_errors::Handler::with_emitter(true, None, emitter)

src/librustdoc/core.rs

@@ -4,6 +4,7 @@ use rustc_data_structures::sync::{self, Lrc};
 use rustc_data_structures::unord::UnordSet;
 use rustc_errors::emitter::{Emitter, EmitterWriter};
 use rustc_errors::json::JsonEmitter;
+use rustc_errors::TerminalUrl;
 use rustc_feature::UnstableFeatures;
 use rustc_hir::def::Res;
 use rustc_hir::def_id::{DefId, DefIdMap, DefIdSet, LocalDefId};
@@ -144,6 +145,7 @@ pub(crate) fn new_handler(
                     diagnostic_width,
                     false,
                     unstable_opts.track_diagnostics,
+                    TerminalUrl::No,
                 )
                 .ui_testing(unstable_opts.ui_testing),
             )
@@ -163,6 +165,7 @@ pub(crate) fn new_handler(
                     diagnostic_width,
                     false,
                     unstable_opts.track_diagnostics,
+                    TerminalUrl::No,
                 )
                 .ui_testing(unstable_opts.ui_testing),
             )

src/librustdoc/doctest.rs

@@ -1,7 +1,7 @@
 use rustc_ast as ast;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::Lrc;
-use rustc_errors::{ColorConfig, ErrorGuaranteed, FatalError};
+use rustc_errors::{ColorConfig, ErrorGuaranteed, FatalError, TerminalUrl};
 use rustc_hir::def_id::{LocalDefId, CRATE_DEF_ID, LOCAL_CRATE};
 use rustc_hir::{self as hir, intravisit, CRATE_HIR_ID};
 use rustc_interface::interface;
@@ -557,6 +557,7 @@ pub(crate) fn make_test(
                 Some(80),
                 false,
                 false,
+                TerminalUrl::No,
             )
             .supports_color();
 
@@ -571,6 +572,7 @@ pub(crate) fn make_test(
                 None,
                 false,
                 false,
+                TerminalUrl::No,
             );
 
             // FIXME(misdreavus): pass `-Z treat-err-as-bug` to the doctest parser
@@ -756,6 +758,7 @@ fn check_if_attr_is_complete(source: &str, edition: Edition) -> bool {
                 None,
                 false,
                 false,
+                TerminalUrl::No,
             );
 
             let handler = Handler::with_emitter(false, None, Box::new(emitter));

src/tools/clippy/clippy_lints/src/doc.rs

@@ -11,7 +11,7 @@ use rustc_ast::token::CommentKind;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_data_structures::sync::Lrc;
 use rustc_errors::emitter::EmitterWriter;
-use rustc_errors::{Applicability, Handler, SuggestionStyle};
+use rustc_errors::{Applicability, Handler, SuggestionStyle, TerminalUrl};
 use rustc_hir as hir;
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_hir::{AnonConst, Expr};
@@ -717,6 +717,7 @@ fn check_code(cx: &LateContext<'_>, text: &str, edition: Edition, span: Span) {
                     None,
                     false,
                     false,
+                    TerminalUrl::No,
                 );
                 let handler = Handler::with_emitter(false, None, Box::new(emitter));
                 let sess = ParseSess::with_span_handler(handler, sm);

src/tools/clippy/src/driver.rs

@@ -220,6 +220,7 @@ fn report_clippy_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) {
         None,
         false,
         false,
+        rustc_errors::TerminalUrl::No,
     ));
     let handler = rustc_errors::Handler::with_emitter(true, None, emitter);
 

src/tools/rustfmt/src/parse/session.rs

@@ -4,7 +4,7 @@ use std::sync::atomic::{AtomicBool, Ordering};
 use rustc_data_structures::sync::{Lrc, Send};
 use rustc_errors::emitter::{Emitter, EmitterWriter};
 use rustc_errors::translation::Translate;
-use rustc_errors::{ColorConfig, Diagnostic, Handler, Level as DiagnosticLevel};
+use rustc_errors::{ColorConfig, Diagnostic, Handler, Level as DiagnosticLevel, TerminalUrl};
 use rustc_session::parse::ParseSess as RawParseSess;
 use rustc_span::{
     source_map::{FilePathMapping, SourceMap},
@@ -135,6 +135,7 @@ fn default_handler(
             None,
             false,
             false,
+            TerminalUrl::No,
         ))
     };
     Handler::with_emitter(

tests/rustdoc-ui/z-help.stdout

@@ -176,6 +176,7 @@
     -Z                 symbol-mangling-version=val -- which mangling version to use for symbol names ('legacy' (default) or 'v0')
     -Z                                   teach=val -- show extended diagnostic help (default: no)
     -Z                               temps-dir=val -- the directory the intermediate files are written to
+    -Z                           terminal-urls=val -- use the OSC 8 hyperlink terminal specification to print hyperlinks in the compiler output
     -Z                                 thinlto=val -- enable ThinLTO when possible
     -Z                           thir-unsafeck=val -- use the THIR unsafety checker (default: no)
     -Z                                 threads=val -- use a thread pool with N threads

tests/ui/diagnostic-flags/terminal_urls.rs

@@ -0,0 +1,4 @@
+// compile-flags: -Zterminal-urls=yes
+fn main() {
+    let () = 4; //~ ERROR
+}

tests/ui/diagnostic-flags/terminal_urls.stderr

@@ -0,0 +1,11 @@
+error[]8;;https://doc.rust-lang.org/error_codes/E0308.htmlE0308]8;;]: mismatched types
+  --> $DIR/terminal_urls.rs:3:9
+   |
+LL |     let () = 4;
+   |         ^^   - this expression has type `{integer}`
+   |         |
+   |         expected integer, found `()`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.