Record the inputs of a build's source fingerprint in its build record (issue 1215)

internal/builder/build_source_test.go

@@ -9,6 +9,8 @@ import (
 	"slices"
 	"strings"
 	"testing"
+
+	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // What a build says it was made from, as files (novox/hq ADR 0267), and what a build compiling a Go
@@ -202,3 +204,20 @@ func TestAGoBundleSaysItsClosureAndAnUntoldImageNothing(t *testing.T) {
 		t.Fatalf("an image compiling nothing it was told of said a build source: %+v", got.Sources)
 	}
 }
+
+// 1215/AC1 (compiled here, run by the merge check; the unit level has 1215/AC1 over the same inputs): a build's
+// result carries every input of its fingerprint, and the SDK function over them gives it again.
+func TestABuildSaysTheInputsItsFingerprintWasComputedFrom(t *testing.T) {
+	got, _, _ := buildTheProxy(t, aSharedRepository("one", "1"), false)
+	if got.SourceInputs == nil {
+		t.Fatal("the result carries no source inputs")
+	}
+	in := *got.SourceInputs
+	if in.Module != "route-proxy" || in.Tree == "" || in.Contexts["server"] == "" {
+		t.Errorf("the inputs miss the module, its tree or the server's context: %+v", in)
+	}
+	fp, none := delivery.SourceFingerprint(in)
+	if fp == "" || none != "" || fp != got.Source {
+		t.Errorf("the inputs give %q (%q); the build recorded %q", fp, none, got.Source)
+	}
+}