Handle rustdoc version when generating crate doc

Author: GuillaumeGomez

src/docbuilder/rustwide_builder.rs

@@ -22,6 +22,7 @@ use rustwide::toolchain::ToolchainError;
 use rustwide::{Build, Crate, Toolchain, Workspace, WorkspaceBuilder};
 use serde_json::Value;
 use std::collections::{HashMap, HashSet};
+use std::io::{self, Write};
 use std::path::Path;
 use std::sync::Arc;
 
@@ -589,8 +590,17 @@ impl RustwideBuilder {
         rustdoc_flags.extend(vec![
             "--resource-suffix".to_string(),
             format!("-{}", parse_rustc_version(&self.rustc_version)?),
+            "--html-before-content".to_string(),
+            "docrs-version.html".to_string(),
+            "--html-in-header".to_string(),
+            "docsrs-in-header.html".to_string(),
         ]);
 
+        let f = build.host_source_dir().join("docrs-version.html");
+        std::fs::write(f, "<div id=\"docs-rustdoc-v1\"></div>").expect("failed");
+        let f = build.host_source_dir().join("docsrs-in-header.html");
+        std::fs::write(f, "<style>#rustdoc_body_wrapper{padding:0;}</style>").expect("failed");
+
         let mut storage = LogStorage::new(LevelFilter::Info);
         storage.set_max_size(limits.max_log_size());
 

templates/style/rustdoc.scss

@@ -4,9 +4,10 @@
 // This rule is needed to be sure that the footer will always be at the bottom of the page.
 #rustdoc_body_wrapper {
     min-height: calc(100vh - #{$top-navbar-height + $footer-height + 2});
-    padding: 0;
+}
 
-    .sidebar {
+#rustdoc_body_wrapper {
+    #docs-rustdoc-v1 ~ .sidebar {
         margin-top: 0;
         top: $top-navbar-height;
 
@@ -15,7 +16,7 @@
         }
     }
 
-    main {
+    #docs-rustdoc-v1 ~ main {
         padding-bottom: 50px;
     }
 }