Execute configuration comparisons

integrations/ckconfig/diff.go

@@ -0,0 +1,43 @@
+package ckconfig
+
+import (
+	"errors"
+	"fmt"
+
+	commandkit "gitea.maximumdirect.net/eric/CommandKit"
+)
+
+func runConfigDiff[I, S any](invocation commandkit.Invocation, plan *configOperationPlan[I, S], state S) commandkit.Outcome {
+	if plan.comparison == nil || plan.comparison.scope == nil {
+		return configOperationFailure(errors.New("configuration comparison was not prepared"), nil, false)
+	}
+	selected := plan.comparison
+	if err := invocation.Context.Err(); err != nil {
+		return configOperationFailure(err, nil, false)
+	}
+	compare := selected.scope.scope.Compare
+	if compare == nil {
+		return configOperationFailure(fmt.Errorf("configuration scope %q has no comparison callback", selected.scope.scope.Name), nil, false)
+	}
+	acquired, err := compare(invocation.Context, selected.request, state)
+	diagnostics := append([]commandkit.Diagnostic(nil), acquired.Diagnostics...)
+	if err != nil {
+		return configOperationFailure(err, diagnostics, false)
+	}
+	if err := invocation.Context.Err(); err != nil {
+		return configOperationFailure(err, diagnostics, false)
+	}
+	report, err := renderDiffReport(acquired.Value)
+	if err != nil {
+		return configOperationFailure(err, diagnostics, false)
+	}
+	if err := invocation.Context.Err(); err != nil {
+		return configOperationFailure(err, diagnostics, false)
+	}
+	if err := writeConfigReport(invocation.Streams.Out, report); err != nil {
+		return configDeliveryFailure(err, diagnostics, true)
+	}
+	outcome := commandkit.Success()
+	outcome.Diagnostics = diagnostics
+	return outcome
+}