migrations: Change public admin host-container source metadata to object

This migration will change the public admin host-container source to
setting-generator metadata(that will generate source using sundog)
on forward migration.

In backward migration, it will reset the value of the source as string.

Release.toml

@@ -379,11 +379,9 @@ version = "1.28.0"
     "migrate_v1.28.0_aws-control-container-v0-7-18.lz4",
     "migrate_v1.28.0_public-control-container-v0-7-18.lz4",
 ]
-"(1.28.0, 1.29.0)" = [
     "migrate_v1.29.0_remove_weak_settings_migration.lz4",
     "migrate_v1.29.0_update-settings-generator-admin.lz4",
     "migrate_v1.29.0_update-settings-generator-control.lz4",
     "migrate_v1.29.0_change-public-admin-container-to-set-gen.lz4",
     "migrate_v1.29.0_change-public-control-container-to-set-gen.lz4",
-]
 

sources/settings-migrations/v1.29.0/change-public-admin-container-to-set-gen/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "change-public-admin-container-to-set-gen"
+version = "0.1.0"
+authors = ["Shikha Vyaghra <[email protected]>"]
+license = "Apache-2.0 OR MIT"
+edition = "2021"
+publish = false
+# Don't rebuild crate just because of changes to README.
+exclude = ["README.md"]
+
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+migration-helpers.workspace = true

sources/settings-migrations/v1.29.0/change-public-admin-container-to-set-gen/src/main.rs

@@ -0,0 +1,27 @@
+use migration_helpers::common_migrations::ReplaceSettingWithSettingGeneratorMigration;
+use migration_helpers::{migrate, Result};
+use std::process;
+
+const OLD_ADMIN_CTR: &str = "public.ecr.aws/bottlerocket/bottlerocket-admin:v0.11.14";
+const NEW_ADMIN_CTR: &str = "public.ecr.aws/bottlerocket/bottlerocket-admin:v0.11.14";
+
+/// We bumped the version of the default admin container
+fn run() -> Result<()> {
+    migrate(ReplaceSettingWithSettingGeneratorMigration {
+        setting: "settings.host-containers.admin.source",
+        old_val: OLD_ADMIN_CTR,
+        new_val: NEW_ADMIN_CTR,
+        setting_gen_command: "emitter public.ecr.aws/bottlerocket/bottlerocket-admin:v0.11.13",
+        skip_if_populated: true,
+    })
+}
+
+// Returning a Result from main makes it print a Debug representation of the error, but with Snafu
+// we have nice Display representations of the error, so we wrap "main" (run) and print any error.
+// https://github.com/shepmaster/snafu/issues/110
+fn main() {
+    if let Err(e) = run() {
+        eprintln!("{}", e);
+        process::exit(1);
+    }
+}