nested aux-build in tests/rustdoc/ tests

src/tools/compiletest/src/command-list.rs

@@ -18,6 +18,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "check-test-line-numbers-match",
     "compare-output-lines-by-subset",
     "compile-flags",
+    "doc-flags",
     "dont-check-compiler-stderr",
     "dont-check-compiler-stdout",
     "dont-check-failure-status",
@@ -225,6 +226,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "should-ice",
     "stderr-per-bitwidth",
     "test-mir-pass",
+    "unique-doc-out-dir",
     "unset-exec-env",
     "unset-rustc-env",
     // Used by the tidy check `unknown_revision`.

src/tools/compiletest/src/header.rs

@@ -95,6 +95,8 @@ pub struct TestProps {
     pub compile_flags: Vec<String>,
     // Extra flags to pass when the compiled code is run (such as --bench)
     pub run_flags: Vec<String>,
+    /// Extra flags to pass to rustdoc but not the compiler.
+    pub doc_flags: Vec<String>,
     // If present, the name of a file that this test should match when
     // pretty-printed
     pub pp_exact: Option<PathBuf>,
@@ -122,6 +124,9 @@ pub struct TestProps {
     pub unset_exec_env: Vec<String>,
     // Build documentation for all specified aux-builds as well
     pub build_aux_docs: bool,
+    /// Build the documentation for each crate in a unique output directory.
+    /// Uses <root output directory>/docs/<test name>/doc
+    pub unique_doc_out_dir: bool,
     // Flag to force a crate to be built with the host architecture
     pub force_host: bool,
     // Check stdout for error-pattern output as well as stderr
@@ -220,8 +225,10 @@ mod directives {
     pub const REGEX_ERROR_PATTERN: &'static str = "regex-error-pattern";
     pub const COMPILE_FLAGS: &'static str = "compile-flags";
     pub const RUN_FLAGS: &'static str = "run-flags";
+    pub const DOC_FLAGS: &'static str = "doc-flags";
     pub const SHOULD_ICE: &'static str = "should-ice";
     pub const BUILD_AUX_DOCS: &'static str = "build-aux-docs";
+    pub const UNIQUE_DOC_OUT_DIR: &'static str = "unique-doc-out-dir";
     pub const FORCE_HOST: &'static str = "force-host";
     pub const CHECK_STDOUT: &'static str = "check-stdout";
     pub const CHECK_RUN_RESULTS: &'static str = "check-run-results";
@@ -267,6 +274,7 @@ impl TestProps {
             regex_error_patterns: vec![],
             compile_flags: vec![],
             run_flags: vec![],
+            doc_flags: vec![],
             pp_exact: None,
             aux_builds: vec![],
             aux_bins: vec![],
@@ -281,6 +289,7 @@ impl TestProps {
             exec_env: vec![],
             unset_exec_env: vec![],
             build_aux_docs: false,
+            unique_doc_out_dir: false,
             force_host: false,
             check_stdout: false,
             check_run_results: false,
@@ -377,6 +386,8 @@ impl TestProps {
                         |r| r,
                     );
 
+                    config.push_name_value_directive(ln, DOC_FLAGS, &mut self.doc_flags, |r| r);
+
                     fn split_flags(flags: &str) -> Vec<String> {
                         // Individual flags can be single-quoted to preserve spaces; see
                         // <https://github.com/rust-lang/rust/pull/115948/commits/957c5db6>.
@@ -414,6 +425,8 @@ impl TestProps {
 
                     config.set_name_directive(ln, SHOULD_ICE, &mut self.should_ice);
                     config.set_name_directive(ln, BUILD_AUX_DOCS, &mut self.build_aux_docs);
+                    config.set_name_directive(ln, UNIQUE_DOC_OUT_DIR, &mut self.unique_doc_out_dir);
+
                     config.set_name_directive(ln, FORCE_HOST, &mut self.force_host);
                     config.set_name_directive(ln, CHECK_STDOUT, &mut self.check_stdout);
                     config.set_name_directive(ln, CHECK_RUN_RESULTS, &mut self.check_run_results);

src/tools/compiletest/src/runtest.rs

@@ -1,5 +1,6 @@
 // ignore-tidy-filelength
 
+use std::borrow::Cow;
 use std::collections::{HashMap, HashSet};
 use std::ffi::{OsStr, OsString};
 use std::fs::{self, create_dir_all, File, OpenOptions};
@@ -723,7 +724,7 @@ impl<'test> TestCx<'test> {
         self.maybe_add_external_args(&mut rustc, &self.config.target_rustcflags);
         rustc.args(&self.props.compile_flags);
 
-        self.compose_and_run_compiler(rustc, Some(src))
+        self.compose_and_run_compiler(rustc, Some(src), self.testpaths)
     }
 
     fn run_debuginfo_test(&self) {
@@ -1579,13 +1580,15 @@ impl<'test> TestCx<'test> {
             passes,
         );
 
-        self.compose_and_run_compiler(rustc, None)
+        self.compose_and_run_compiler(rustc, None, self.testpaths)
     }
 
-    fn document(&self, out_dir: &Path) -> ProcRes {
+    /// `root_out_dir` and `root_testpaths` refer to the parameters of the actual test being run.
+    /// Auxiliaries, no matter how deep, have the same root_out_dir and root_testpaths.
+    fn document(&self, root_out_dir: &Path, root_testpaths: &TestPaths) -> ProcRes {
         if self.props.build_aux_docs {
             for rel_ab in &self.props.aux_builds {
-                let aux_testpaths = self.compute_aux_test_paths(&self.testpaths, rel_ab);
+                let aux_testpaths = self.compute_aux_test_paths(root_testpaths, rel_ab);
                 let aux_props =
                     self.props.from_aux_file(&aux_testpaths.file, self.revision, self.config);
                 let aux_cx = TestCx {
@@ -1596,7 +1599,9 @@ impl<'test> TestCx<'test> {
                 };
                 // Create the directory for the stdout/stderr files.
                 create_dir_all(aux_cx.output_base_dir()).unwrap();
-                let auxres = aux_cx.document(out_dir);
+                // use root_testpaths here, because aux-builds should have the
+                // same --out-dir and auxiliary directory.
+                let auxres = aux_cx.document(&root_out_dir, root_testpaths);
                 if !auxres.status.success() {
                     return auxres;
                 }
@@ -1606,21 +1611,40 @@ impl<'test> TestCx<'test> {
         let aux_dir = self.aux_output_dir_name();
 
         let rustdoc_path = self.config.rustdoc_path.as_ref().expect("--rustdoc-path not passed");
-        let mut rustdoc = Command::new(rustdoc_path);
 
+        // actual --out-dir given to the auxiliary or test, as opposed to the root out dir for the entire
+        // test
+        let out_dir: Cow<'_, Path> = if self.props.unique_doc_out_dir {
+            let file_name = self.testpaths.file.file_stem().expect("file name should not be empty");
+            let out_dir = PathBuf::from_iter([
+                root_out_dir,
+                Path::new("docs"),
+                Path::new(file_name),
+                Path::new("doc"),
+            ]);
+            create_dir_all(&out_dir).unwrap();
+            Cow::Owned(out_dir)
+        } else {
+            Cow::Borrowed(root_out_dir)
+        };
+
+        let mut rustdoc = Command::new(rustdoc_path);
+        let current_dir = output_base_dir(self.config, root_testpaths, self.safe_revision());
+        rustdoc.current_dir(current_dir);
         rustdoc
             .arg("-L")
             .arg(self.config.run_lib_path.to_str().unwrap())
             .arg("-L")
             .arg(aux_dir)
             .arg("-o")
-            .arg(out_dir)
+            .arg(out_dir.as_ref())
             .arg("--deny")
             .arg("warnings")
             .arg(&self.testpaths.file)
             .arg("-A")
             .arg("internal_features")
-            .args(&self.props.compile_flags);
+            .args(&self.props.compile_flags)
+            .args(&self.props.doc_flags);
 
         if self.config.mode == RustdocJson {
             rustdoc.arg("--output-format").arg("json").arg("-Zunstable-options");
@@ -1630,7 +1654,7 @@ impl<'test> TestCx<'test> {
             rustdoc.arg(format!("-Clinker={}", linker));
         }
 
-        self.compose_and_run_compiler(rustdoc, None)
+        self.compose_and_run_compiler(rustdoc, None, root_testpaths)
     }
 
     fn exec_compiled_test(&self) -> ProcRes {
@@ -1828,9 +1852,16 @@ impl<'test> TestCx<'test> {
         }
     }
 
-    fn compose_and_run_compiler(&self, mut rustc: Command, input: Option<String>) -> ProcRes {
+    /// `root_testpaths` refers to the path of the original test.
+    /// the auxiliary and the test with an aux-build have the same `root_testpaths`.
+    fn compose_and_run_compiler(
+        &self,
+        mut rustc: Command,
+        input: Option<String>,
+        root_testpaths: &TestPaths,
+    ) -> ProcRes {
         let aux_dir = self.aux_output_dir();
-        self.build_all_auxiliary(&self.testpaths, &aux_dir, &mut rustc);
+        self.build_all_auxiliary(root_testpaths, &aux_dir, &mut rustc);
 
         rustc.envs(self.props.rustc_env.clone());
         self.props.unset_rustc_env.iter().fold(&mut rustc, Command::env_remove);
@@ -2545,7 +2576,7 @@ impl<'test> TestCx<'test> {
             Vec::new(),
         );
 
-        let proc_res = self.compose_and_run_compiler(rustc, None);
+        let proc_res = self.compose_and_run_compiler(rustc, None, self.testpaths);
         let output_path = self.get_filecheck_file("ll");
         (proc_res, output_path)
     }
@@ -2581,7 +2612,7 @@ impl<'test> TestCx<'test> {
             Vec::new(),
         );
 
-        let proc_res = self.compose_and_run_compiler(rustc, None);
+        let proc_res = self.compose_and_run_compiler(rustc, None, self.testpaths);
         let output_path = self.get_filecheck_file("s");
         (proc_res, output_path)
     }
@@ -2664,7 +2695,7 @@ impl<'test> TestCx<'test> {
         let out_dir = self.output_base_dir();
         remove_and_create_dir_all(&out_dir);
 
-        let proc_res = self.document(&out_dir);
+        let proc_res = self.document(&out_dir, &self.testpaths);
         if !proc_res.status.success() {
             self.fatal_proc_rec("rustdoc failed!", &proc_res);
         }
@@ -2723,7 +2754,7 @@ impl<'test> TestCx<'test> {
         let aux_dir = new_rustdoc.aux_output_dir();
         new_rustdoc.build_all_auxiliary(&new_rustdoc.testpaths, &aux_dir, &mut rustc);
 
-        let proc_res = new_rustdoc.document(&compare_dir);
+        let proc_res = new_rustdoc.document(&compare_dir, &new_rustdoc.testpaths);
         if !proc_res.status.success() {
             eprintln!("failed to run nightly rustdoc");
             return;
@@ -2846,7 +2877,7 @@ impl<'test> TestCx<'test> {
         let out_dir = self.output_base_dir();
         remove_and_create_dir_all(&out_dir);
 
-        let proc_res = self.document(&out_dir);
+        let proc_res = self.document(&out_dir, &self.testpaths);
         if !proc_res.status.success() {
             self.fatal_proc_rec("rustdoc failed!", &proc_res);
         }
@@ -2922,31 +2953,24 @@ impl<'test> TestCx<'test> {
     fn check_rustdoc_test_option(&self, res: ProcRes) {
         let mut other_files = Vec::new();
         let mut files: HashMap<String, Vec<usize>> = HashMap::new();
-        let cwd = env::current_dir().unwrap();
-        files.insert(
-            self.testpaths
-                .file
-                .strip_prefix(&cwd)
-                .unwrap_or(&self.testpaths.file)
-                .to_str()
-                .unwrap()
-                .replace('\\', "/"),
-            self.get_lines(&self.testpaths.file, Some(&mut other_files)),
-        );
+        let normalized = fs::canonicalize(&self.testpaths.file).expect("failed to canonicalize");
+        let normalized = normalized.to_str().unwrap().replace('\\', "/");
+        files.insert(normalized, self.get_lines(&self.testpaths.file, Some(&mut other_files)));
         for other_file in other_files {
             let mut path = self.testpaths.file.clone();
             path.set_file_name(&format!("{}.rs", other_file));
-            files.insert(
-                path.strip_prefix(&cwd).unwrap_or(&path).to_str().unwrap().replace('\\', "/"),
-                self.get_lines(&path, None),
-            );
+            let path = fs::canonicalize(path).expect("failed to canonicalize");
+            let normalized = path.to_str().unwrap().replace('\\', "/");
+            files.insert(normalized, self.get_lines(&path, None));
         }
 
         let mut tested = 0;
         for _ in res.stdout.split('\n').filter(|s| s.starts_with("test ")).inspect(|s| {
             if let Some((left, right)) = s.split_once(" - ") {
                 let path = left.rsplit("test ").next().unwrap();
-                if let Some(ref mut v) = files.get_mut(&path.replace('\\', "/")) {
+                let path = fs::canonicalize(&path).expect("failed to canonicalize");
+                let path = path.to_str().unwrap().replace('\\', "/");
+                if let Some(ref mut v) = files.get_mut(&path) {
                     tested += 1;
                     let mut iter = right.split("(line ");
                     iter.next();
@@ -3778,7 +3802,7 @@ impl<'test> TestCx<'test> {
         if let Some(nodejs) = &self.config.nodejs {
             let out_dir = self.output_base_dir();
 
-            self.document(&out_dir);
+            self.document(&out_dir, &self.testpaths);
 
             let root = self.config.find_rust_src_root().unwrap();
             let file_stem =
@@ -4094,7 +4118,7 @@ impl<'test> TestCx<'test> {
                 rustc.arg(crate_name);
             }
 
-            let res = self.compose_and_run_compiler(rustc, None);
+            let res = self.compose_and_run_compiler(rustc, None, self.testpaths);
             if !res.status.success() {
                 self.fatal_proc_rec("failed to compile fixed code", &res);
             }

src/tools/compiletest/src/runtest/coverage.rs

@@ -191,7 +191,7 @@ impl<'test> TestCx<'test> {
 
         rustdoc_cmd.arg(&self.testpaths.file);
 
-        let proc_res = self.compose_and_run_compiler(rustdoc_cmd, None);
+        let proc_res = self.compose_and_run_compiler(rustdoc_cmd, None, self.testpaths);
         if !proc_res.status.success() {
             self.fatal_proc_rec("rustdoc --test failed!", &proc_res)
         }

tests/rustdoc/cross-crate-info/cargo-transitive-no-index/auxiliary/q.rs

@@ -0,0 +1,2 @@
+//@ build-aux-docs
+pub struct Quebec;

tests/rustdoc/cross-crate-info/cargo-transitive-no-index/auxiliary/t.rs

@@ -0,0 +1,4 @@
+//@ aux-build:q.rs
+//@ build-aux-docs
+extern crate q;
+pub trait Tango {}

tests/rustdoc/cross-crate-info/cargo-transitive-no-index/s.rs

@@ -0,0 +1,16 @@
+//@ aux-build:t.rs
+//@ build-aux-docs
+//@ has q/struct.Quebec.html
+//@ has s/struct.Sierra.html
+//@ has t/trait.Tango.html
+//@ hasraw s/struct.Sierra.html 'Tango'
+//@ hasraw trait.impl/t/trait.Tango.js 'struct.Sierra.html'
+//@ hasraw search-index.js 'Tango'
+//@ hasraw search-index.js 'Sierra'
+//@ hasraw search-index.js 'Quebec'
+
+// We document multiple crates into the same output directory, which
+// merges the cross-crate information. Everything is available.
+extern crate t;
+pub struct Sierra;
+impl t::Tango for Sierra {}

tests/rustdoc/cross-crate-info/cargo-transitive/auxiliary/q.rs

@@ -0,0 +1,5 @@
+//@ build-aux-docs
+//@ doc-flags:--enable-index-page
+//@ doc-flags:-Zunstable-options
+
+pub struct Quebec;

tests/rustdoc/cross-crate-info/cargo-transitive/auxiliary/t.rs

@@ -0,0 +1,7 @@
+//@ aux-build:q.rs
+//@ build-aux-docs
+//@ doc-flags:--enable-index-page
+//@ doc-flags:-Zunstable-options
+
+extern crate q;
+pub trait Tango {}

tests/rustdoc/cross-crate-info/cargo-transitive/s.rs

@@ -0,0 +1,24 @@
+//@ aux-build:t.rs
+//@ build-aux-docs
+//@ doc-flags:--enable-index-page
+//@ doc-flags:-Zunstable-options
+
+//@ has index.html
+//@ has index.html '//h1' 'List of all crates'
+//@ has index.html '//ul[@class="all-items"]//a[@href="q/index.html"]' 'q'
+//@ has index.html '//ul[@class="all-items"]//a[@href="s/index.html"]' 's'
+//@ has index.html '//ul[@class="all-items"]//a[@href="t/index.html"]' 't'
+//@ has q/struct.Quebec.html
+//@ has s/struct.Sierra.html
+//@ has t/trait.Tango.html
+//@ hasraw s/struct.Sierra.html 'Tango'
+//@ hasraw trait.impl/t/trait.Tango.js 'struct.Sierra.html'
+//@ hasraw search-index.js 'Tango'
+//@ hasraw search-index.js 'Sierra'
+//@ hasraw search-index.js 'Quebec'
+
+// We document multiple crates into the same output directory, which
+// merges the cross-crate information. Everything is available.
+extern crate t;
+pub struct Sierra;
+impl t::Tango for Sierra {}

tests/rustdoc/cross-crate-info/cargo-two-no-index/auxiliary/f.rs

@@ -0,0 +1,2 @@
+//@ build-aux-docs
+pub trait Foxtrot {}

tests/rustdoc/cross-crate-info/cargo-two-no-index/e.rs

@@ -0,0 +1,14 @@
+//@ aux-build:f.rs
+//@ build-aux-docs
+//@ has e/enum.Echo.html
+//@ has f/trait.Foxtrot.html
+//@ hasraw e/enum.Echo.html 'Foxtrot'
+//@ hasraw trait.impl/f/trait.Foxtrot.js 'enum.Echo.html'
+//@ hasraw search-index.js 'Foxtrot'
+//@ hasraw search-index.js 'Echo'
+
+// document two crates in the same way that cargo does. do not provide
+// --enable-index-page
+extern crate f;
+pub enum Echo {}
+impl f::Foxtrot for Echo {}

tests/rustdoc/cross-crate-info/cargo-two/auxiliary/f.rs

@@ -0,0 +1,5 @@
+//@ build-aux-docs
+//@ doc-flags:--enable-index-page
+//@ doc-flags:-Zunstable-options
+
+pub trait Foxtrot {}