Rollup merge of #57929 - GuillaumeGomez:rustodc-remove-old-style-files, r=ollie27

Rustdoc remove old style files

Reopening of #56577 (which I can't seem to reopen...).

I made the flag unstable so with this change, what was blocking the PR is now gone I assume.

13 files changed, 64 insertions, 23 deletions

diff --git a/src/bootstrap/bin/rustdoc.rs b/src/bootstrap/bin/rustdoc.rs
index dec74e60c71..aeb15821b0b 100644
--- a/src/bootstrap/bin/rustdoc.rs
+++ b/src/bootstrap/bin/rustdoc.rs
@@ -16,6 +16,7 @@ fn main() {
     let libdir = env::var_os("RUSTDOC_LIBDIR").expect("RUSTDOC_LIBDIR was not set");
     let stage = env::var("RUSTC_STAGE").expect("RUSTC_STAGE was not set");
     let sysroot = env::var_os("RUSTC_SYSROOT").expect("RUSTC_SYSROOT was not set");
+    let mut has_unstable = false;
 
     use std::str::FromStr;
 
@@ -54,9 +55,22 @@ fn main() {
     // it up so we can make rustdoc print this into the docs
     if let Some(version) = env::var_os("RUSTDOC_CRATE_VERSION") {
         // This "unstable-options" can be removed when `--crate-version` is stabilized
-        cmd.arg("-Z")
-           .arg("unstable-options")
-           .arg("--crate-version").arg(version);
+        if !has_unstable {
+            cmd.arg("-Z")
+               .arg("unstable-options");
+        }
+        cmd.arg("--crate-version").arg(version);
+        has_unstable = true;
+    }
+
+    // Needed to be able to run all rustdoc tests.
+    if let Some(_) = env::var_os("RUSTDOC_GENERATE_REDIRECT_PAGES") {
+        // This "unstable-options" can be removed when `--generate-redirect-pages` is stabilized
+        if !has_unstable {
+            cmd.arg("-Z")
+               .arg("unstable-options");
+        }
+        cmd.arg("--generate-redirect-pages");
     }
 
     if verbose > 1 {
diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index d14b23e5988..660f9b9ef57 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -517,6 +517,7 @@ impl Step for Std {
             cargo.arg("--")
                  .arg("--markdown-css").arg("rust.css")
                  .arg("--markdown-no-toc")
+                 .arg("--generate-redirect-pages")
                  .arg("--index-page").arg(&builder.src.join("src/doc/index.md"));
 
             builder.run(&mut cargo);
@@ -581,7 +582,9 @@ impl Step for Test {
         let mut cargo = builder.cargo(compiler, Mode::Test, target, "doc");
         compile::test_cargo(builder, &compiler, target, &mut cargo);
 
-        cargo.arg("--no-deps").arg("-p").arg("test");
+        cargo.arg("--no-deps")
+             .arg("-p").arg("test")
+             .env("RUSTDOC_GENERATE_REDIRECT_PAGES", "1");
 
         builder.run(&mut cargo);
         builder.cp_r(&my_out, &out);
@@ -650,9 +653,9 @@ impl Step for WhitelistedRustc {
         // We don't want to build docs for internal compiler dependencies in this
         // step (there is another step for that). Therefore, we whitelist the crates
         // for which docs must be built.
-        cargo.arg("--no-deps");
         for krate in &["proc_macro"] {
-            cargo.arg("-p").arg(krate);
+            cargo.arg("-p").arg(krate)
+                 .env("RUSTDOC_GENERATE_REDIRECT_PAGES", "1");
         }
 
         builder.run(&mut cargo);
diff --git a/src/librustdoc/config.rs b/src/librustdoc/config.rs
index ec4ee2d66a5..91fbe877cb7 100644
--- a/src/librustdoc/config.rs
+++ b/src/librustdoc/config.rs
@@ -192,6 +192,8 @@ pub struct RenderOptions {
     /// If false, the `select` element to have search filtering by crates on rendered docs
     /// won't be generated.
     pub generate_search_filter: bool,
+    /// Option (disabled by default) to generate files used by RLS and some other tools.
+    pub generate_redirect_pages: bool,
 }
 
 impl Options {
@@ -436,6 +438,7 @@ impl Options {
         let static_root_path = matches.opt_str("static-root-path");
         let generate_search_filter = !matches.opt_present("disable-per-crate-search");
         let persist_doctests = matches.opt_str("persist-doctests").map(PathBuf::from);
+        let generate_redirect_pages = matches.opt_present("generate-redirect-pages");
 
         let (lint_opts, describe_lints, lint_cap) = get_cmd_lint_options(matches, error_format);
 
@@ -480,6 +483,7 @@ impl Options {
                 markdown_css,
                 markdown_playground_url,
                 generate_search_filter,
+                generate_redirect_pages,
             }
         })
     }
diff --git a/src/librustdoc/html/render.rs b/src/librustdoc/html/render.rs
index e660d27d74b..692d8796688 100644
--- a/src/librustdoc/html/render.rs
+++ b/src/librustdoc/html/render.rs
@@ -148,6 +148,8 @@ struct SharedContext {
     /// If false, the `select` element to have search filtering by crates on rendered docs
     /// won't be generated.
     pub generate_search_filter: bool,
+    /// Option disabled by default to generate files used by RLS and some other tools.
+    pub generate_redirect_pages: bool,
 }
 
 impl SharedContext {
@@ -516,6 +518,7 @@ pub fn run(mut krate: clean::Crate,
         resource_suffix,
         static_root_path,
         generate_search_filter,
+        generate_redirect_pages,
         ..
     } = options;
 
@@ -545,6 +548,7 @@ pub fn run(mut krate: clean::Crate,
         resource_suffix,
         static_root_path,
         generate_search_filter,
+        generate_redirect_pages,
     };
 
     // If user passed in `--playground-url` arg, we fill in crate name here
@@ -2246,17 +2250,18 @@ impl Context {
                 if !self.render_redirect_pages {
                     all.append(full_path(self, &item), &item_type);
                 }
-                // Redirect from a sane URL using the namespace to Rustdoc's
-                // URL for the page.
-                let redir_name = format!("{}.{}.html", name, item_type.name_space());
-                let redir_dst = self.dst.join(redir_name);
-                if let Ok(redirect_out) = OpenOptions::new().create_new(true)
-                                                            .write(true)
-                                                            .open(&redir_dst) {
-                    let mut redirect_out = BufWriter::new(redirect_out);
-                    try_err!(layout::redirect(&mut redirect_out, file_name), &redir_dst);
+                if self.shared.generate_redirect_pages {
+                    // Redirect from a sane URL using the namespace to Rustdoc's
+                    // URL for the page.
+                    let redir_name = format!("{}.{}.html", name, item_type.name_space());
+                    let redir_dst = self.dst.join(redir_name);
+                    if let Ok(redirect_out) = OpenOptions::new().create_new(true)
+                                                                .write(true)
+                                                                .open(&redir_dst) {
+                        let mut redirect_out = BufWriter::new(redirect_out);
+                        try_err!(layout::redirect(&mut redirect_out, file_name), &redir_dst);
+                    }
                 }
-
                 // If the item is a macro, redirect from the old macro URL (with !)
                 // to the new one (without).
                 if item_type == ItemType::Macro {
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 0b34a27794f..43b36653515 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -345,6 +345,11 @@ fn opts() -> Vec<RustcOptGroup> {
                        "Directory to persist doctest executables into",
                        "PATH")
         }),
+        unstable("generate-redirect-pages", |o| {
+            o.optflag("",
+                      "generate-redirect-pages",
+                      "Generate extra pages to support legacy URLs and tool links")
+        }),
     ]
 }
 
diff --git a/src/test/rustdoc/issue-19190.rs b/src/test/rustdoc/issue-19190.rs
index a7c25538f7c..c6bac51c574 100644
--- a/src/test/rustdoc/issue-19190.rs
+++ b/src/test/rustdoc/issue-19190.rs
@@ -1,3 +1,5 @@
+// compile-flags:-Z unstable-options --generate-redirect-pages
+
 use std::ops::Deref;
 
 pub struct Foo;
diff --git a/src/test/rustdoc/issue-21092.rs b/src/test/rustdoc/issue-21092.rs
index 14f547abd9a..b054145a483 100644
--- a/src/test/rustdoc/issue-21092.rs
+++ b/src/test/rustdoc/issue-21092.rs
@@ -3,7 +3,6 @@
 
 extern crate issue_21092;
 
-// @has issue_21092/Bar.t.html
 // @has issue_21092/struct.Bar.html
 // @has - '//*[@id="associatedtype.Bar"]' 'type Bar = i32'
 pub use issue_21092::{Foo, Bar};
diff --git a/src/test/rustdoc/issue-35169-2.rs b/src/test/rustdoc/issue-35169-2.rs
index 0caead100d6..33f7646ced6 100644
--- a/src/test/rustdoc/issue-35169-2.rs
+++ b/src/test/rustdoc/issue-35169-2.rs
@@ -23,7 +23,6 @@ impl DerefMut for Bar {
     fn deref_mut(&mut self) -> &mut Foo { loop {} }
 }
 
-// @has issue_35169_2/Bar.t.html
 // @has issue_35169_2/struct.Bar.html
 // @has - '//*[@id="by_ref.v"]' 'fn by_ref(&self)'
 // @has - '//*[@id="method.by_ref"]' 'fn by_ref(&self)'
diff --git a/src/test/rustdoc/issue-35169.rs b/src/test/rustdoc/issue-35169.rs
index 0978b103076..04fffc40572 100644
--- a/src/test/rustdoc/issue-35169.rs
+++ b/src/test/rustdoc/issue-35169.rs
@@ -18,7 +18,6 @@ impl Deref for Bar {
     fn deref(&self) -> &Foo { loop {} }
 }
 
-// @has issue_35169/Bar.t.html
 // @has issue_35169/struct.Bar.html
 // @has - '//*[@id="by_ref.v"]' 'fn by_ref(&self)'
 // @has - '//*[@id="method.by_ref"]' 'fn by_ref(&self)'
diff --git a/src/test/rustdoc/macros.rs b/src/test/rustdoc/macros.rs
index c66a2c845bf..fb4f02ad160 100644
--- a/src/test/rustdoc/macros.rs
+++ b/src/test/rustdoc/macros.rs
@@ -2,8 +2,6 @@
 // @has - //pre '() => { ... };'
 // @has - //pre '($a:tt) => { ... };'
 // @has - //pre '($e:expr) => { ... };'
-// @has macros/macro.my_macro!.html
-// @has - //a 'macro.my_macro.html'
 #[macro_export]
 macro_rules! my_macro {
     () => [];
diff --git a/src/test/rustdoc/src-links.rs b/src/test/rustdoc/src-links.rs
index 902a319a7b9..353ce10243e 100644
--- a/src/test/rustdoc/src-links.rs
+++ b/src/test/rustdoc/src-links.rs
@@ -14,13 +14,11 @@ pub mod bar {
     // @has foo/bar/baz/index.html '//a/@href' '../../../src/foo/src-links.rs.html'
     pub mod baz {
         /// Dox
-        // @has foo/bar/baz/baz.v.html
         // @has foo/bar/baz/fn.baz.html '//a/@href' '../../../src/foo/src-links.rs.html'
         pub fn baz() { }
     }
 
     /// Dox
-    // @has foo/bar/Foobar.t.html
     // @has foo/bar/trait.Foobar.html '//a/@href' '../../src/foo/src-links.rs.html'
     pub trait Foobar { fn dummy(&self) { } }
 
diff --git a/src/test/rustdoc/structfields.rs b/src/test/rustdoc/structfields.rs
index 35cea8afe21..235f0e852da 100644
--- a/src/test/rustdoc/structfields.rs
+++ b/src/test/rustdoc/structfields.rs
@@ -1,3 +1,5 @@
+// compile-flags:-Z unstable-options --generate-redirect-pages
+
 // @has structfields/Foo.t.html
 // @has - struct.Foo.html
 // @has structfields/struct.Foo.html
diff --git a/src/test/rustdoc/without-redirect.rs b/src/test/rustdoc/without-redirect.rs
new file mode 100644
index 00000000000..a076f8a3c5e
--- /dev/null
+++ b/src/test/rustdoc/without-redirect.rs
@@ -0,0 +1,13 @@
+#![crate_name = "foo"]
+
+// @has foo/macro.bar.html
+// @has foo/macro.bar!.html
+// @!has foo/bar.m.html
+#[macro_export]
+macro_rules! bar {
+    () => {}
+}
+
+// @has foo/struct.Bar.html
+// @!has foo/Bar.t.html
+pub struct Bar;