Add extra-targets to package metadata

Author: QuietMisdreavus

src/docbuilder/metadata.rs

@@ -20,6 +20,7 @@ use failure::err_msg;
 /// all-features = true
 /// no-default-features = true
 /// default-target = "x86_64-unknown-linux-gnu"
+/// extra-targets = [ "x86_64-apple-darwin", "x86_64-pc-windows-msvc" ]
 /// rustc-args = [ "--example-rustc-arg" ]
 /// rustdoc-args = [ "--example-rustdoc-arg" ]
 /// ```
@@ -43,6 +44,11 @@ pub struct Metadata {
     /// is always built on this target. You can change default target by setting this.
     pub default_target: Option<String>,
 
+    /// Docs.rs doesn't automatically build extra targets for crates. If you want a crate to build
+    /// for multiple targets, set `extra-targets` to the list of targets to build, in addition to
+    /// `default-target`.
+    pub extra_targets: Vec<String>,
+
     /// List of command line arguments for `rustc`.
     pub rustc_args: Option<Vec<String>>,
 
@@ -87,6 +93,7 @@ impl Metadata {
             default_target: None,
             rustc_args: None,
             rustdoc_args: None,
+            extra_targets: Vec::new(),
         }
     }
 
@@ -111,6 +118,9 @@ impl Metadata {
                         .and_then(|v| v.as_bool()).unwrap_or(metadata.all_features);
                     metadata.default_target = table.get("default-target")
                         .and_then(|v| v.as_str()).map(|v| v.to_owned());
+                    metadata.extra_targets = table.get("extra-targets").and_then(|f| f.as_array())
+                        .and_then(|f| f.iter().map(|v| v.as_str().map(|v| v.to_owned())).collect())
+                        .unwrap_or_default();
                     metadata.rustc_args = table.get("rustc-args").and_then(|f| f.as_array())
                         .and_then(|f| f.iter().map(|v| v.as_str().map(|v| v.to_owned())).collect());
                     metadata.rustdoc_args = table.get("rustdoc-args").and_then(|f| f.as_array())
@@ -140,6 +150,7 @@ mod test {
             all-features = true
             no-default-features = true
             default-target = "x86_64-unknown-linux-gnu"
+            extra-targets = [ "x86_64-apple-darwin", "x86_64-pc-windows-msvc" ]
             rustc-args = [ "--example-rustc-arg" ]
             rustdoc-args = [ "--example-rustdoc-arg" ]
         "#;
@@ -159,6 +170,11 @@ mod test {
 
         assert_eq!(metadata.default_target.unwrap(), "x86_64-unknown-linux-gnu".to_owned());
 
+        let extra_targets = metadata.extra_targets;
+        assert_eq!(extra_targets.len(), 2);
+        assert_eq!(extra_targets[0], "x86_64-apple-darwin");
+        assert_eq!(extra_targets[1], "x86_64-pc-windows-msvc");
+
         let rustc_args = metadata.rustc_args.unwrap();
         assert_eq!(rustc_args.len(), 1);
         assert_eq!(rustc_args[0], "--example-rustc-arg".to_owned());

templates/about.hbs

@@ -162,6 +162,9 @@ no-default-features = true
 # - i686-pc-windows-msvc
 default-target = "x86_64-unknown-linux-gnu"
 
+# Extra targets to build, same available targets as `default-target` (default: none)
+extra-targets = [ "x86_64-apple-darwin", "x86_64-pc-windows-msvc" ]
+
 # Additional `RUSTFLAGS` to set (default: none)
 rustc-args = [ "--example-rustc-arg" ]