chore: add concurrency in release

.github/workflows/ci.yml

@@ -85,3 +85,6 @@ jobs:
       uses: MarcoIeni/[email protected]
       with:
         command: release-pr
+    concurrency:
+      group: release-${{github.ref}}
+      cancel-in-progress: false

crates/gh-workflow/src/ctx.rs

@@ -35,6 +35,10 @@ enum Step {
         right: Box<Step>,
     },
     Literal(String),
+    Concat {
+        left: Box<Step>,
+        right: Box<Step>,
+    },
 }
 
 impl<A> Context<A> {
@@ -83,6 +87,18 @@ impl<A> Context<A> {
     }
 }
 
+impl Context<String> {
+    pub fn concat(&self, other: Context<String>) -> Context<String> {
+        Context {
+            marker: Default::default(),
+            step: Step::Concat {
+                left: Box::new(self.step.clone()),
+                right: Box::new(other.step),
+            },
+        }
+    }
+}
+
 #[allow(unused)]
 #[derive(Context)]
 pub struct Github {
@@ -203,6 +219,9 @@ impl fmt::Display for Step {
             Step::Literal(value) => {
                 write!(f, "'{}'", value)
             }
+            Step::Concat { left, right } => {
+                write!(f, "{}{}", left, right)
+            }
         }
     }
 }

crates/gh-workflow/src/workflow.rs

@@ -657,6 +657,13 @@ pub struct Concurrency {
     pub limit: Option<u32>,
 }
 
+impl Concurrency {
+    pub fn new(group: impl Into<Expression>) -> Self {
+        let expr: Expression = group.into();
+        Self { group: expr.0, ..Default::default() }
+    }
+}
+
 /// Represents permissions for the `GITHUB_TOKEN`.
 #[derive(Debug, Setters, Serialize, Deserialize, Clone, Default, PartialEq, Eq)]
 #[serde(rename_all = "kebab-case")]

crates/gh-workflow/tests/ci.rs

@@ -60,6 +60,9 @@ fn generate() {
         .add_step(Release::default().command(Command::Release));
 
     let release_pr = Job::new("Release PR")
+        .concurrency(
+            Concurrency::new(Expression::new("release-${{github.ref}}")).cancel_in_progress(false),
+        )
         .add_needs(build.clone())
         .add_env(Env::github())
         .add_env(Env::new(