bugfix: proper until calculation for content created outside packages

internal/slicer/slicer.go

@@ -264,8 +264,15 @@ func Run(options *RunOptions) error {
 		}
 	}
 	for relPath, slices := range relPaths {
-		// All the pathInfo(s) are equivalent because of conflict validation.
+		until := setup.UntilMutate
+		for _, slice := range slices {
+			if slice.Contents[relPath].Until == setup.UntilNone {
+				until = setup.UntilNone
+				break
+			}
+		}
 		pathInfo := slices[0].Contents[relPath]
+		pathInfo.Until = until
 		data := pathData{
 			until:   pathInfo.Until,
 			mutable: pathInfo.Mutable,

internal/slicer/slicer_test.go

@@ -1037,6 +1037,30 @@ var slicerTests = []slicerTest{{
 	},
 	filesystem:    map[string]string{},
 	manifestPaths: map[string]string{},
+}, {
+	summary: "Content not created in packages with until:mutate on one and reading from script",
+	slices: []setup.SliceKey{
+		{"test-package", "myslice1"},
+		{"test-package", "myslice2"},
+	},
+	release: map[string]string{
+		"slices/mydir/test-package.yaml": `
+			package: test-package
+			slices:
+				myslice1:
+					contents:
+						/file: {text: foo, until: mutate}
+					mutate: |
+						content.read("/file")
+				myslice2:
+					contents:
+						/file: {text: foo}
+					mutate: |
+						content.read("/file")
+		`,
+	},
+	filesystem:    map[string]string{"/file": "file 0644 2c26b46b"},
+	manifestPaths: map[string]string{"/file": "file 0644 2c26b46b {test-package_myslice1,test-package_myslice2}"},
 }, {
 	summary: "Install two packages, both are recorded",
 	slices: []setup.SliceKey{