diff --git a/compiler/rustc_builtin_macros/src/source_util.rs b/compiler/rustc_builtin_macros/src/source_util.rs index dbb86df6811da..abcdfabcaedae 100644 --- a/compiler/rustc_builtin_macros/src/source_util.rs +++ b/compiler/rustc_builtin_macros/src/source_util.rs @@ -3,17 +3,22 @@ use rustc_ast::ptr::P; use rustc_ast::token; use rustc_ast::tokenstream::TokenStream; use rustc_ast_pretty::pprust; -use rustc_expand::base::{check_zero_tts, get_single_str_from_tts, parse_expr, resolve_path}; +use rustc_data_structures::sync::Lrc; +use rustc_expand::base::{ + check_zero_tts, get_single_str_from_tts, get_single_str_spanned_from_tts, parse_expr, + resolve_path, +}; use rustc_expand::base::{DummyResult, ExpandResult, ExtCtxt}; use rustc_expand::base::{MacEager, MacResult, MacroExpanderResult}; use rustc_expand::module::DirOwnership; use rustc_parse::new_parser_from_file; use rustc_parse::parser::{ForceCollect, Parser}; use rustc_session::lint::builtin::INCOMPLETE_INCLUDE; +use rustc_span::source_map::SourceMap; use rustc_span::symbol::Symbol; use rustc_span::{Pos, Span}; - use smallvec::SmallVec; +use std::path::{Path, PathBuf}; use std::rc::Rc; // These macros all relate to the file system; they either return @@ -182,35 +187,26 @@ pub fn expand_include_str( tts: TokenStream, ) -> MacroExpanderResult<'static> { let sp = cx.with_def_site_ctxt(sp); - let ExpandResult::Ready(mac) = get_single_str_from_tts(cx, sp, tts, "include_str!") else { + let ExpandResult::Ready(mac) = get_single_str_spanned_from_tts(cx, sp, tts, "include_str!") + else { return ExpandResult::Retry(()); }; - let file = match mac { - Ok(file) => file, + let (path, path_span) = match mac { + Ok(res) => res, Err(guar) => return ExpandResult::Ready(DummyResult::any(sp, guar)), }; - let file = match resolve_path(&cx.sess, file.as_str(), sp) { - Ok(f) => f, - Err(err) => { - let guar = err.emit(); - return ExpandResult::Ready(DummyResult::any(sp, guar)); - } - }; - ExpandResult::Ready(match cx.source_map().load_binary_file(&file) { + ExpandResult::Ready(match load_binary_file(cx, path.as_str().as_ref(), sp, path_span) { Ok(bytes) => match std::str::from_utf8(&bytes) { Ok(src) => { let interned_src = Symbol::intern(src); MacEager::expr(cx.expr_str(sp, interned_src)) } Err(_) => { - let guar = cx.dcx().span_err(sp, format!("{} wasn't a utf-8 file", file.display())); + let guar = cx.dcx().span_err(sp, format!("`{path}` wasn't a utf-8 file")); DummyResult::any(sp, guar) } }, - Err(e) => { - let guar = cx.dcx().span_err(sp, format!("couldn't read {}: {}", file.display(), e)); - DummyResult::any(sp, guar) - } + Err(dummy) => dummy, }) } @@ -220,28 +216,127 @@ pub fn expand_include_bytes( tts: TokenStream, ) -> MacroExpanderResult<'static> { let sp = cx.with_def_site_ctxt(sp); - let ExpandResult::Ready(mac) = get_single_str_from_tts(cx, sp, tts, "include_bytes!") else { + let ExpandResult::Ready(mac) = get_single_str_spanned_from_tts(cx, sp, tts, "include_bytes!") + else { return ExpandResult::Retry(()); }; - let file = match mac { - Ok(file) => file, + let (path, path_span) = match mac { + Ok(res) => res, Err(guar) => return ExpandResult::Ready(DummyResult::any(sp, guar)), }; - let file = match resolve_path(&cx.sess, file.as_str(), sp) { - Ok(f) => f, + ExpandResult::Ready(match load_binary_file(cx, path.as_str().as_ref(), sp, path_span) { + Ok(bytes) => { + let expr = cx.expr(sp, ast::ExprKind::IncludedBytes(bytes)); + MacEager::expr(expr) + } + Err(dummy) => dummy, + }) +} + +fn load_binary_file( + cx: &mut ExtCtxt<'_>, + original_path: &Path, + macro_span: Span, + path_span: Span, +) -> Result, Box> { + let resolved_path = match resolve_path(&cx.sess, original_path, macro_span) { + Ok(path) => path, Err(err) => { let guar = err.emit(); - return ExpandResult::Ready(DummyResult::any(sp, guar)); + return Err(DummyResult::any(macro_span, guar)); } }; - ExpandResult::Ready(match cx.source_map().load_binary_file(&file) { - Ok(bytes) => { - let expr = cx.expr(sp, ast::ExprKind::IncludedBytes(bytes)); - MacEager::expr(expr) + match cx.source_map().load_binary_file(&resolved_path) { + Ok(data) => Ok(data), + Err(io_err) => { + let mut err = cx.dcx().struct_span_err( + macro_span, + format!("couldn't read `{}`: {io_err}", resolved_path.display()), + ); + + if original_path.is_relative() { + let source_map = cx.sess.source_map(); + let new_path = source_map + .span_to_filename(macro_span.source_callsite()) + .into_local_path() + .and_then(|src| find_path_suggestion(source_map, src.parent()?, original_path)) + .and_then(|path| path.into_os_string().into_string().ok()); + + if let Some(new_path) = new_path { + err.span_suggestion( + path_span, + "there is a file with the same name in a different directory", + format!("\"{}\"", new_path.replace('\\', "/").escape_debug()), + rustc_lint_defs::Applicability::MachineApplicable, + ); + } + } + let guar = err.emit(); + Err(DummyResult::any(macro_span, guar)) } - Err(e) => { - let guar = cx.dcx().span_err(sp, format!("couldn't read {}: {}", file.display(), e)); - DummyResult::any(sp, guar) + } +} + +fn find_path_suggestion( + source_map: &SourceMap, + base_dir: &Path, + wanted_path: &Path, +) -> Option { + // Fix paths that assume they're relative to cargo manifest dir + let mut base_c = base_dir.components(); + let mut wanted_c = wanted_path.components(); + let mut without_base = None; + while let Some(wanted_next) = wanted_c.next() { + if wanted_c.as_path().file_name().is_none() { + break; } + // base_dir may be absolute + while let Some(base_next) = base_c.next() { + if base_next == wanted_next { + without_base = Some(wanted_c.as_path()); + break; + } + } + } + let root_absolute = without_base.into_iter().map(PathBuf::from); + + let base_dir_components = base_dir.components().count(); + // Avoid going all the way to the root dir + let max_parent_components = if base_dir.is_relative() { + base_dir_components + 1 + } else { + base_dir_components.saturating_sub(1) + }; + + // Try with additional leading ../ + let mut prefix = PathBuf::new(); + let add = std::iter::from_fn(|| { + prefix.push(".."); + Some(prefix.join(wanted_path)) }) + .take(max_parent_components.min(3)); + + // Try without leading directories + let mut trimmed_path = wanted_path; + let remove = std::iter::from_fn(|| { + let mut components = trimmed_path.components(); + let removed = components.next()?; + trimmed_path = components.as_path(); + let _ = trimmed_path.file_name()?; // ensure there is a file name left + Some([ + Some(trimmed_path.to_path_buf()), + (removed != std::path::Component::ParentDir) + .then(|| Path::new("..").join(trimmed_path)), + ]) + }) + .flatten() + .flatten() + .take(4); + + for new_path in root_absolute.chain(add).chain(remove) { + if source_map.file_exists(&base_dir.join(&new_path)) { + return Some(new_path); + } + } + None } diff --git a/compiler/rustc_expand/src/base.rs b/compiler/rustc_expand/src/base.rs index 30ee02ea3c0aa..b25dd8fe67b78 100644 --- a/compiler/rustc_expand/src/base.rs +++ b/compiler/rustc_expand/src/base.rs @@ -1252,21 +1252,18 @@ pub fn resolve_path(sess: &Session, path: impl Into, span: Span) -> PRe // after macro expansion (that is, they are unhygienic). if !path.is_absolute() { let callsite = span.source_callsite(); - let mut result = match sess.source_map().span_to_filename(callsite) { - FileName::Real(name) => name - .into_local_path() - .expect("attempting to resolve a file path in an external file"), - FileName::DocTest(path, _) => path, - other => { - return Err(sess.dcx().create_err(errors::ResolveRelativePath { - span, - path: sess.source_map().filename_for_diagnostics(&other).to_string(), - })); - } + let source_map = sess.source_map(); + let Some(mut base_path) = source_map.span_to_filename(callsite).into_local_path() else { + return Err(sess.dcx().create_err(errors::ResolveRelativePath { + span, + path: source_map + .filename_for_diagnostics(&source_map.span_to_filename(callsite)) + .to_string(), + })); }; - result.pop(); - result.push(path); - Ok(result) + base_path.pop(); + base_path.push(path); + Ok(base_path) } else { Ok(path) } @@ -1379,6 +1376,15 @@ pub fn get_single_str_from_tts( tts: TokenStream, name: &str, ) -> ExpandResult, ()> { + get_single_str_spanned_from_tts(cx, span, tts, name).map(|res| res.map(|(s, _)| s)) +} + +pub fn get_single_str_spanned_from_tts( + cx: &mut ExtCtxt<'_>, + span: Span, + tts: TokenStream, + name: &str, +) -> ExpandResult, ()> { let mut p = cx.new_parser_from_tts(tts); if p.token == token::Eof { let guar = cx.dcx().emit_err(errors::OnlyOneArgument { span, name }); @@ -1393,7 +1399,13 @@ pub fn get_single_str_from_tts( if p.token != token::Eof { cx.dcx().emit_err(errors::OnlyOneArgument { span, name }); } - expr_to_string(cx, ret, "argument must be a string literal").map(|s| s.map(|(s, _)| s)) + expr_to_spanned_string(cx, ret, "argument must be a string literal").map(|res| { + res.map_err(|err| match err { + Ok((err, _)) => err.emit(), + Err(guar) => guar, + }) + .map(|(symbol, _style, span)| (symbol, span)) + }) } /// Extracts comma-separated expressions from `tts`. diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs index 616a7ccc7c64f..0c974ef4ca3eb 100644 --- a/compiler/rustc_span/src/lib.rs +++ b/compiler/rustc_span/src/lib.rs @@ -427,6 +427,17 @@ impl FileName { src.hash(&mut hasher); FileName::InlineAsm(hasher.finish()) } + + /// Returns the path suitable for reading from the file system on the local host, + /// if this information exists. + /// Avoid embedding this in build artifacts; see `remapped_path_if_available()` for that. + pub fn into_local_path(self) -> Option { + match self { + FileName::Real(path) => path.into_local_path(), + FileName::DocTest(path, _) => Some(path), + _ => None, + } + } } /// Represents a span. diff --git a/tests/ui/include-macros/parent_dir.rs b/tests/ui/include-macros/parent_dir.rs new file mode 100644 index 0000000000000..5fadff77a37e4 --- /dev/null +++ b/tests/ui/include-macros/parent_dir.rs @@ -0,0 +1,12 @@ +//@ normalize-stderr-test: "`: .*" -> "`: $$FILE_NOT_FOUND_MSG" + +fn main() { + let _ = include_str!("include-macros/file.txt"); //~ ERROR couldn't read + //~^HELP different directory + let _ = include_str!("hello.rs"); //~ ERROR couldn't read + //~^HELP different directory + let _ = include_bytes!("../../data.bin"); //~ ERROR couldn't read + //~^HELP different directory + let _ = include_str!("tests/ui/include-macros/file.txt"); //~ ERROR couldn't read + //~^HELP different directory +} diff --git a/tests/ui/include-macros/parent_dir.stderr b/tests/ui/include-macros/parent_dir.stderr new file mode 100644 index 0000000000000..0470d5b1f1e3c --- /dev/null +++ b/tests/ui/include-macros/parent_dir.stderr @@ -0,0 +1,50 @@ +error: couldn't read `$DIR/include-macros/file.txt`: $FILE_NOT_FOUND_MSG + --> $DIR/parent_dir.rs:4:13 + | +LL | let _ = include_str!("include-macros/file.txt"); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: this error originates in the macro `include_str` (in Nightly builds, run with -Z macro-backtrace for more info) +help: there is a file with the same name in a different directory + | +LL | let _ = include_str!("file.txt"); + | ~~~~~~~~~~ + +error: couldn't read `$DIR/hello.rs`: $FILE_NOT_FOUND_MSG + --> $DIR/parent_dir.rs:6:13 + | +LL | let _ = include_str!("hello.rs"); + | ^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: this error originates in the macro `include_str` (in Nightly builds, run with -Z macro-backtrace for more info) +help: there is a file with the same name in a different directory + | +LL | let _ = include_str!("../hello.rs"); + | ~~~~~~~~~~~~~ + +error: couldn't read `$DIR/../../data.bin`: $FILE_NOT_FOUND_MSG + --> $DIR/parent_dir.rs:8:13 + | +LL | let _ = include_bytes!("../../data.bin"); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: this error originates in the macro `include_bytes` (in Nightly builds, run with -Z macro-backtrace for more info) +help: there is a file with the same name in a different directory + | +LL | let _ = include_bytes!("data.bin"); + | ~~~~~~~~~~ + +error: couldn't read `$DIR/tests/ui/include-macros/file.txt`: $FILE_NOT_FOUND_MSG + --> $DIR/parent_dir.rs:10:13 + | +LL | let _ = include_str!("tests/ui/include-macros/file.txt"); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: this error originates in the macro `include_str` (in Nightly builds, run with -Z macro-backtrace for more info) +help: there is a file with the same name in a different directory + | +LL | let _ = include_str!("file.txt"); + | ~~~~~~~~~~ + +error: aborting due to 4 previous errors + diff --git a/tests/ui/macros/macros-nonfatal-errors.rs b/tests/ui/macros/macros-nonfatal-errors.rs index 20e6d70500358..46e865031ecd5 100644 --- a/tests/ui/macros/macros-nonfatal-errors.rs +++ b/tests/ui/macros/macros-nonfatal-errors.rs @@ -1,4 +1,4 @@ -//@ normalize-stderr-test: "existed:.*\(" -> "existed: $$FILE_NOT_FOUND_MSG (" +//@ normalize-stderr-test: "`: .*" -> "`: $$FILE_NOT_FOUND_MSG" // test that errors in a (selection) of macros don't kill compilation // immediately, so that we get more errors listed at a time. diff --git a/tests/ui/macros/macros-nonfatal-errors.stderr b/tests/ui/macros/macros-nonfatal-errors.stderr index ca373ea6cd9e4..abf43e2a009d7 100644 --- a/tests/ui/macros/macros-nonfatal-errors.stderr +++ b/tests/ui/macros/macros-nonfatal-errors.stderr @@ -200,7 +200,7 @@ error: argument must be a string literal LL | include_str!(invalid); | ^^^^^^^ -error: couldn't read $DIR/i'd be quite surprised if a file with this name existed: $FILE_NOT_FOUND_MSG (os error 2) +error: couldn't read `$DIR/i'd be quite surprised if a file with this name existed`: $FILE_NOT_FOUND_MSG --> $DIR/macros-nonfatal-errors.rs:113:5 | LL | include_str!("i'd be quite surprised if a file with this name existed"); @@ -214,7 +214,7 @@ error: argument must be a string literal LL | include_bytes!(invalid); | ^^^^^^^ -error: couldn't read $DIR/i'd be quite surprised if a file with this name existed: $FILE_NOT_FOUND_MSG (os error 2) +error: couldn't read `$DIR/i'd be quite surprised if a file with this name existed`: $FILE_NOT_FOUND_MSG --> $DIR/macros-nonfatal-errors.rs:115:5 | LL | include_bytes!("i'd be quite surprised if a file with this name existed");