Revert "Auto merge of rust-lang#82776 - jyn514:extern-url-fallback, r=GuillaumeGomez"

This reverts commit b1928aa, reversing
changes made to 99b73e8.

Author: jyn514

src/librustdoc/clean/types.rs

@@ -168,7 +168,6 @@ impl ExternalCrate {
     crate fn location(
         &self,
         extern_url: Option<&str>,
-        extern_url_takes_precedence: bool,
         dst: &std::path::Path,
         tcx: TyCtxt<'_>,
     ) -> ExternalLocation {
@@ -190,10 +189,8 @@ impl ExternalCrate {
             return Local;
         }
 
-        if extern_url_takes_precedence {
-            if let Some(url) = extern_url {
-                return to_remote(url);
-            }
+        if let Some(url) = extern_url {
+            return to_remote(url);
         }
 
         // Failing that, see if there's an attribute specifying where to find this
@@ -205,7 +202,6 @@ impl ExternalCrate {
             .filter_map(|a| a.value_str())
             .map(to_remote)
             .next()
-            .or(extern_url.map(to_remote)) // NOTE: only matters if `extern_url_takes_precedence` is false
             .unwrap_or(Unknown) // Well, at least we tried.
     }
 

src/librustdoc/config.rs

@@ -233,8 +233,6 @@ crate struct RenderOptions {
     crate extension_css: Option<PathBuf>,
     /// A map of crate names to the URL to use instead of querying the crate's `html_root_url`.
     crate extern_html_root_urls: BTreeMap<String, String>,
-    /// Whether to give precedence to `html_root_url` or `--exten-html-root-url`.
-    crate extern_html_root_takes_precedence: bool,
     /// A map of the default settings (values are as for DOM storage API). Keys should lack the
     /// `rustdoc-` prefix.
     crate default_settings: FxHashMap<String, String>,
@@ -660,8 +658,6 @@ impl Options {
         let show_type_layout = matches.opt_present("show-type-layout");
         let nocapture = matches.opt_present("nocapture");
         let generate_link_to_definition = matches.opt_present("generate-link-to-definition");
-        let extern_html_root_takes_precedence =
-            matches.opt_present("extern-html-root-takes-precedence");
 
         if generate_link_to_definition && (show_coverage || output_format != OutputFormat::Html) {
             diag.struct_err(
@@ -717,7 +713,6 @@ impl Options {
                 themes,
                 extension_css,
                 extern_html_root_urls,
-                extern_html_root_takes_precedence,
                 default_settings,
                 resource_suffix,
                 enable_minification,

src/librustdoc/core.rs

@@ -499,7 +499,9 @@ crate fn run_global_ctxt(
 
     let render_options = ctxt.render_options;
     let mut cache = ctxt.cache;
-    krate = tcx.sess.time("create_format_cache", || cache.populate(krate, tcx, &render_options));
+    krate = tcx.sess.time("create_format_cache", || {
+        cache.populate(krate, tcx, &render_options.extern_html_root_urls, &render_options.output)
+    });
 
     // The main crate doc comments are always collapsed.
     krate.collapsed = true;

src/librustdoc/formats/cache.rs

@@ -1,4 +1,6 @@
+use std::collections::BTreeMap;
 use std::mem;
+use std::path::Path;
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_hir::def_id::{CrateNum, DefId, CRATE_DEF_INDEX};
@@ -7,7 +9,6 @@ use rustc_middle::ty::TyCtxt;
 use rustc_span::symbol::sym;
 
 use crate::clean::{self, GetDefId, ItemId};
-use crate::config::RenderOptions;
 use crate::fold::DocFolder;
 use crate::formats::item_type::ItemType;
 use crate::formats::Impl;
@@ -141,21 +142,19 @@ impl Cache {
         &mut self,
         mut krate: clean::Crate,
         tcx: TyCtxt<'_>,
-        render_options: &RenderOptions,
+        extern_html_root_urls: &BTreeMap<String, String>,
+        dst: &Path,
     ) -> clean::Crate {
         // Crawl the crate to build various caches used for the output
         debug!(?self.crate_version);
         self.traits = krate.external_traits.take();
-        let RenderOptions { extern_html_root_takes_precedence, output: dst, .. } = render_options;
 
         // Cache where all our extern crates are located
         // FIXME: this part is specific to HTML so it'd be nice to remove it from the common code
         for &e in &krate.externs {
             let name = e.name(tcx);
-            let extern_url =
-                render_options.extern_html_root_urls.get(&*name.as_str()).map(|u| &**u);
-            let location = e.location(extern_url, *extern_html_root_takes_precedence, dst, tcx);
-            self.extern_locations.insert(e.crate_num, location);
+            let extern_url = extern_html_root_urls.get(&*name.as_str()).map(|u| &**u);
+            self.extern_locations.insert(e.crate_num, e.location(extern_url, &dst, tcx));
             self.external_paths.insert(e.def_id(), (vec![name.to_string()], ItemType::Module));
         }
 

src/librustdoc/lib.rs

@@ -295,13 +295,6 @@ fn opts() -> Vec<RustcOptGroup> {
                 "NAME=URL",
             )
         }),
-        unstable("extern-html-root-takes-precedence", |o| {
-            o.optflagmulti(
-                "",
-                "extern-html-root-takes-precedence",
-                "give precedence to `--extern-html-root-url`, not `html_root_url`",
-            )
-        }),
         stable("plugin-path", |o| o.optmulti("", "plugin-path", "removed", "DIR")),
         stable("C", |o| {
             o.optmulti("C", "codegen", "pass a codegen option to rustc", "OPT[=VALUE]")

src/test/rustdoc/auxiliary/html_root.rs

@@ -1,18 +1,6 @@
-// compile-flags:-Z unstable-options --extern-html-root-url html_root=https://example.com/override --extern-html-root-url no_html_root=https://example.com/override
-// aux-build:html_root.rs
-// aux-build:no_html_root.rs
-// NOTE: intentionally does not build any auxiliary docs
-
-extern crate html_root;
-extern crate no_html_root;
+// compile-flags:-Z unstable-options --extern-html-root-url core=https://example.com/core/0.1.0
 
 // @has extern_html_root_url/index.html
-// `html_root_url` should override `--extern-html-root-url`
-// @has - '//a/@href' 'https://example.com/html_root/html_root/fn.foo.html'
-#[doc(no_inline)]
-pub use html_root::foo;
-
+// @has - '//a/@href' 'https://example.com/core/0.1.0/core/iter/index.html'
 #[doc(no_inline)]
-// `--extern-html-root-url` should apply if no `html_root_url` is given
-// @has - '//a/@href' 'https://example.com/override/no_html_root/fn.bar.html'
-pub use no_html_root::bar;
+pub use std::iter;