Add COMPLETION_SUBCOMMAND and is_completing method

1 files changed, 19 insertions, 0 deletions

diff --git a/mingling_core/src/comp/comp_ctx.rs b/mingling_core/src/comp/comp_ctx.rs
new file mode 100644
index 0000000..02e79c5
--- /dev/null
+++ b/mingling_core/src/comp/comp_ctx.rs
@@ -0,0 +1,19 @@
+use crate::{COMPLETION_SUBCOMMAND, Program, ProgramCollect};
+
+impl<C> Program<C>
+where
+    C: ProgramCollect<Enum = C>,
+{
+    /// Checks whether the program is currently in a completion mode.
+    ///
+    /// This is determined by checking if the special completion subcommand
+    /// (defined by [`COMPLETION_SUBCOMMAND`]) appears among the parsed arguments.
+    /// When `true`, the program should generate shell completions instead of
+    /// running its normal execution path.
+    pub fn is_completing(&self) -> bool {
+        // Check if the first argument (args[1]) is the completion subcommand
+        self.args
+            .get(1)
+            .is_some_and(|arg| arg == COMPLETION_SUBCOMMAND)
+    }
+}