Add unstable option to only emit shared/crate-specific files

The intended use case is for docs.rs, which can now copy exactly the
files it cares about, rather than having to guess based on whether they
have a resource suffix or not. In particular, some files have a resource
suffix but cannot be shared between crates: https://github.com/rust-lang/docs.rs/pull/1312#issuecomment-798783688

The end goal is to fix https://github.com/rust-lang/docs.rs/issues/1327
by reverting https://github.com/rust-lang/docs.rs/pull/1324.

This obsoletes `--print=unversioned-files`, which I plan to remove as
soon as docs.rs stops using it.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/librustdoc/html/render/context.rs b/src/librustdoc/html/render/context.rs
index 468bd9997a6..17cedeb5a51 100644
--- a/src/librustdoc/html/render/context.rs
+++ b/src/librustdoc/html/render/context.rs
@@ -288,6 +288,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
     ) -> Result<(Self, clean::Crate), Error> {
         // need to save a copy of the options for rendering the index page
         let md_opts = options.clone();
+        let emit_crate = options.should_emit_crate();
         let RenderOptions {
             output,
             external_html,
@@ -393,7 +394,9 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
 
         let dst = output;
         scx.ensure_dir(&dst)?;
-        krate = sources::render(&dst, &mut scx, krate)?;
+        if emit_crate {
+            krate = sources::render(&dst, &mut scx, krate)?;
+        }
 
         // Build our search index
         let index = build_index(&krate, &mut cache, tcx);