migration-helpers: add new template migrator

This replaces ReplaceTemplateMigration with SchnauzerTemplateMigration,
which uses the new template rendering machinery to perform the same
behavior as the previous migrations.

sources/api/migration/migration-helpers/Cargo.toml

@@ -15,7 +15,9 @@ handlebars = "4"
 schnauzer = { path = "../../schnauzer", version = "0.1" }
 serde = "1"
 serde_json = "1"
+shlex = "1"
 snafu = "0.7"
+tokio = { version = "~1.32", default-features = false, features = ["rt-multi-thread"] }
 
 [dev-dependencies]
 maplit = "1"

sources/api/migration/migration-helpers/src/error.rs

@@ -32,6 +32,9 @@ pub enum Error {
     #[snafu(display("Unable to serialize Value: {}", source))]
     Serialize { source: datastore::ScalarError },
 
+    #[snafu(display("Unable to serialize datastore for rendering templates: {}", source))]
+    SerializeTemplateData { source: serde_json::Error },
+
     #[snafu(display("Unable to serialize release data: {}", source))]
     SerializeRelease {
         source: datastore::serialization::Error,
@@ -85,6 +88,12 @@ pub enum Error {
         source: Box<handlebars::RenderError>,
     },
 
+    #[snafu(display("Unable to render template command '{}': {}", cmdline, source))]
+    RenderSchnauzerV2Template {
+        cmdline: String,
+        source: schnauzer::v2::cli::CLIError,
+    },
+
     #[snafu(display("'{}' is set to non-string value", setting))]
     NonStringSettingDataType { setting: String },
 
@@ -119,6 +128,9 @@ pub enum Error {
         path: PathBuf,
         source: std::io::Error,
     },
+
+    #[snafu(display("Failed to create async runtime: {}", source))]
+    CreateTokioRuntime { source: std::io::Error },
 }
 
 /// Result alias containing our Error type.

sources/api/migration/migrations/v1.15.0/aws-admin-container-v0-11-0/src/main.rs

@@ -1,3 +1,4 @@
+#![allow(deprecated)]
 use migration_helpers::common_migrations::ReplaceTemplateMigration;
 use migration_helpers::{migrate, Result};
 use std::process;

sources/api/migration/migrations/v1.15.0/aws-control-container-v0-7-4/src/main.rs

@@ -1,3 +1,4 @@
+#![allow(deprecated)]
 use migration_helpers::common_migrations::ReplaceTemplateMigration;
 use migration_helpers::{migrate, Result};
 use std::process;

sources/api/migration/migrations/v1.16.0/aws-admin-container-v0-11-1/src/main.rs

@@ -1,3 +1,4 @@
+#![allow(deprecated)]
 use migration_helpers::common_migrations::ReplaceTemplateMigration;
 use migration_helpers::{migrate, Result};
 use std::process;

sources/api/migration/migrations/v1.16.0/aws-control-container-v0-7-5/src/main.rs

@@ -1,3 +1,4 @@
+#![allow(deprecated)]
 use migration_helpers::common_migrations::ReplaceTemplateMigration;
 use migration_helpers::{migrate, Result};
 use std::process;