wip: zen

1 files changed, 55 insertions, 0 deletions

diff --git a/packages/cloud/core/src/util/log.ts b/packages/cloud/core/src/util/log.ts
new file mode 100644
index 000000000..4f2d25c13
--- /dev/null
+++ b/packages/cloud/core/src/util/log.ts
@@ -0,0 +1,55 @@
+import { Context } from "../context"
+
+export namespace Log {
+  const ctx = Context.create<{
+    tags: Record<string, any>
+  }>()
+
+  export function create(tags?: Record<string, any>) {
+    tags = tags || {}
+
+    const result = {
+      info(message?: any, extra?: Record<string, any>) {
+        const prefix = Object.entries({
+          ...use().tags,
+          ...tags,
+          ...extra,
+        })
+          .map(([key, value]) => `${key}=${value}`)
+          .join(" ")
+        console.log(prefix, message)
+        return result
+      },
+      tag(key: string, value: string) {
+        if (tags) tags[key] = value
+        return result
+      },
+      clone() {
+        return Log.create({ ...tags })
+      },
+    }
+
+    return result
+  }
+
+  export function provide<R>(tags: Record<string, any>, cb: () => R) {
+    const existing = use()
+    return ctx.provide(
+      {
+        tags: {
+          ...existing.tags,
+          ...tags,
+        },
+      },
+      cb,
+    )
+  }
+
+  function use() {
+    try {
+      return ctx.use()
+    } catch (e) {
+      return { tags: {} }
+    }
+  }
+}