From 9d29a6acfdd0f6d64bc53589c6822b5b7553b3db Mon Sep 17 00:00:00 2001
From: "Artem V. Navrotskiy" <bozaro@yandex.ru>
Date: Mon, 12 Sep 2022 23:21:17 +0300
Subject: [PATCH] Add tag to `PushInfo` provider

---
 container/providers.bzl | 1 +
 container/push.bzl      | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/container/providers.bzl b/container/providers.bzl
index 4c04fbc95..0a08c8265 100644
--- a/container/providers.bzl
+++ b/container/providers.bzl
@@ -53,6 +53,7 @@ PushInfo = provider(fields = [
     "registry",
     "repository",
     "digest",
+    "tag",
 ])
 
 # A provider containing information exposed by filter_layer rules
diff --git a/container/push.bzl b/container/push.bzl
index baef9c25f..045e992a3 100644
--- a/container/push.bzl
+++ b/container/push.bzl
@@ -59,7 +59,11 @@ def _impl(ctx):
     # If a tag file is provided, override <tag> with tag value
     if ctx.file.tag_file:
         tag = "$(cat {})".format(_get_runfile_path(ctx, ctx.file.tag_file))
+        tag_file = ctx.file.tag_file
         pusher_input.append(ctx.file.tag_file)
+    else:
+        tag_file = ctx.actions.declare_file(ctx.label.name + "_tag")
+        ctx.actions.write(tag_file, "latest")
 
     stamp = ctx.attr.stamp[StampSettingInfo].value
     stamp_inputs = [ctx.info_file, ctx.version_file] if stamp else []
@@ -137,6 +141,7 @@ def _impl(ctx):
             registry = registry,
             repository = repository,
             digest = ctx.outputs.digest,
+            tag = tag_file,
         ),
     ]