Rollup merge of #82803 - jyn514:unversioned-files, r=GuillaumeGomez

rustdoc: Add an unstable option to print all unversioned files

This allows sharing those files between different doc invocations
without having to know their names ahead of time.

Helps with https://github.com/rust-lang/docs.rs/issues/1302.
r? ````@GuillaumeGomez```` cc ````@pietroalbini```` ````@Nemo157````

2 files changed, 25 insertions, 15 deletions

diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs
index 50cae50c2c3..9b9ec2581cf 100644
--- a/src/librustdoc/html/render/mod.rs
+++ b/src/librustdoc/html/render/mod.rs
@@ -33,6 +33,7 @@ mod print_item;
 mod write_shared;
 
 crate use context::*;
+crate use write_shared::FILES_UNVERSIONED;
 
 use std::cell::{Cell, RefCell};
 use std::collections::VecDeque;
diff --git a/src/librustdoc/html/render/write_shared.rs b/src/librustdoc/html/render/write_shared.rs
index cbf0f9a4927..02ad01aa29a 100644
--- a/src/librustdoc/html/render/write_shared.rs
+++ b/src/librustdoc/html/render/write_shared.rs
@@ -3,6 +3,7 @@ use std::fmt::Write;
 use std::fs::{self, File};
 use std::io::prelude::*;
 use std::io::{self, BufReader};
+use std::lazy::SyncLazy as Lazy;
 use std::path::{Component, Path, PathBuf};
 
 use itertools::Itertools;
@@ -18,6 +19,26 @@ use crate::error::Error;
 use crate::formats::FormatRenderer;
 use crate::html::{layout, static_files};
 
+crate static FILES_UNVERSIONED: Lazy<FxHashMap<&str, &[u8]>> = Lazy::new(|| {
+    map! {
+        "FiraSans-Regular.woff2" => static_files::fira_sans::REGULAR2,
+        "FiraSans-Medium.woff2" => static_files::fira_sans::MEDIUM2,
+        "FiraSans-Regular.woff" => static_files::fira_sans::REGULAR,
+        "FiraSans-Medium.woff" => static_files::fira_sans::MEDIUM,
+        "FiraSans-LICENSE.txt" => static_files::fira_sans::LICENSE,
+        "SourceSerifPro-Regular.ttf.woff" => static_files::source_serif_pro::REGULAR,
+        "SourceSerifPro-Bold.ttf.woff" => static_files::source_serif_pro::BOLD,
+        "SourceSerifPro-It.ttf.woff" => static_files::source_serif_pro::ITALIC,
+        "SourceSerifPro-LICENSE.md" => static_files::source_serif_pro::LICENSE,
+        "SourceCodePro-Regular.woff" => static_files::source_code_pro::REGULAR,
+        "SourceCodePro-Semibold.woff" => static_files::source_code_pro::SEMIBOLD,
+        "SourceCodePro-LICENSE.txt" => static_files::source_code_pro::LICENSE,
+        "LICENSE-MIT.txt" => static_files::LICENSE_MIT,
+        "LICENSE-APACHE.txt" => static_files::LICENSE_APACHE,
+        "COPYRIGHT.txt" => static_files::COPYRIGHT,
+    }
+});
+
 pub(super) fn write_shared(
     cx: &Context<'_>,
     krate: &Crate,
@@ -212,21 +233,9 @@ themePicker.onblur = handleThemeButtonsBlur;
         static_files::NORMALIZE_CSS,
         options.enable_minification,
     )?;
-    write(cx.dst.join("FiraSans-Regular.woff2"), static_files::fira_sans::REGULAR2)?;
-    write(cx.dst.join("FiraSans-Medium.woff2"), static_files::fira_sans::MEDIUM2)?;
-    write(cx.dst.join("FiraSans-Regular.woff"), static_files::fira_sans::REGULAR)?;
-    write(cx.dst.join("FiraSans-Medium.woff"), static_files::fira_sans::MEDIUM)?;
-    write(cx.dst.join("FiraSans-LICENSE.txt"), static_files::fira_sans::LICENSE)?;
-    write(cx.dst.join("SourceSerifPro-Regular.ttf.woff"), static_files::source_serif_pro::REGULAR)?;
-    write(cx.dst.join("SourceSerifPro-Bold.ttf.woff"), static_files::source_serif_pro::BOLD)?;
-    write(cx.dst.join("SourceSerifPro-It.ttf.woff"), static_files::source_serif_pro::ITALIC)?;
-    write(cx.dst.join("SourceSerifPro-LICENSE.md"), static_files::source_serif_pro::LICENSE)?;
-    write(cx.dst.join("SourceCodePro-Regular.woff"), static_files::source_code_pro::REGULAR)?;
-    write(cx.dst.join("SourceCodePro-Semibold.woff"), static_files::source_code_pro::SEMIBOLD)?;
-    write(cx.dst.join("SourceCodePro-LICENSE.txt"), static_files::source_code_pro::LICENSE)?;
-    write(cx.dst.join("LICENSE-MIT.txt"), static_files::LICENSE_MIT)?;
-    write(cx.dst.join("LICENSE-APACHE.txt"), static_files::LICENSE_APACHE)?;
-    write(cx.dst.join("COPYRIGHT.txt"), static_files::COPYRIGHT)?;
+    for (file, contents) in &*FILES_UNVERSIONED {
+        write(cx.dst.join(file), contents)?;
+    }
 
     fn collect(path: &Path, krate: &str, key: &str) -> io::Result<(Vec<String>, Vec<String>)> {
         let mut ret = Vec::new();