xtask: Don't try to read ruma-macros changelog and only publish it

xtask/src/cargo.rs

@@ -105,6 +105,11 @@ impl Package {
     ///
     /// If `update` is `true`, update the changelog for the release of the given version.
     pub fn changes(&self, update: bool) -> Result<String> {
+        if self.name == "ruma-macros" {
+            // ruma-macros doesn't have a changelog and won't create a tag.
+            return Ok(String::new());
+        }
+
         let mut changelog_path = self.manifest_path.clone();
         changelog_path.set_file_name("CHANGELOG.md");
 

xtask/src/release.rs

@@ -67,7 +67,8 @@ impl ReleaseTask {
     pub(crate) fn run(&mut self) -> Result<()> {
         let title = &self.title();
         let prerelease = !self.version.pre.is_empty();
-        let publish_only = self.package.name == "ruma-identifiers-validation";
+        let publish_only =
+            ["ruma-identifiers-validation", "ruma-macros"].contains(&self.package.name.as_str());
 
         println!(
             "Starting {} for {title}…",