docs: guide - always execute an action

Signed-off-by: guillaume <guillaume.derouville@gmail.com>

docs/guides/1229-always-execute.md

@@ -0,0 +1,24 @@
+---
+slug: /1229/always-execute
+displayed_sidebar: europa
+---
+
+# How to make sure an action is always being executed ?
+
+Dagger implemented a way to tell Buildkit not to rely on cache for a specific action.
+
+The `docker.#Run` and `core.#Exec` definitions have an `always` field:
+
+```cue
+// If set to true, the cache will never be triggered for that specific action.
+always: bool | *false
+```
+
+Any package composed on top of it (`bash.#Run` for example) also exposes this field as it will inherit it from `docker.#Run`:
+
+```cue
+test: bash.#Run & {
+    always: true
+    ...
+}
+```