Pin the categories each shipped category reads

.github/workflows/release.yml

@@ -1,23 +0,0 @@
-name: Release
-
-on:
-  push:
-    tags: ['v*']
-
-permissions:
-  contents: write
-
-jobs:
-  release:
-    name: Gitea release from CHANGELOG.md
-    runs-on: ubuntu-24.04
-    steps:
-      - uses: actions/checkout@v6
-        with:
-          persist-credentials: false
-      - run: python3 release-tooling/publish_release.py
-        env:
-          GITEA_API_URL: ${{ github.api_url }}
-          GITEA_REPOSITORY: ${{ github.repository }}
-          GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          TAG: ${{ github.ref_name }}

shape_test.go

@@ -2,6 +2,7 @@ package fejkdata
 
 import (
 	"os"
+	"sort"
 	"strconv"
 	"strings"
 	"testing"
@@ -10,8 +11,8 @@ import (
 const shapePin = "testdata/shipped_shape.txt"
 
 // TestShippedShapeIsPinned pins what a version promises about the shipped data (see
-// the README's Versioning): every path, each category's format, and each record
-// column's datatype and nullability. REPIN=1 rewrites the pin.
+// the README's Versioning): every path, each category's format and the categories it
+// reads, and each record column's datatype and nullability. REPIN=1 rewrites the pin.
 func TestShippedShapeIsPinned(t *testing.T) {
 	f, err := New(WithSeed(1))
 	if err != nil {
@@ -33,8 +34,9 @@ func TestShippedShapeIsPinned(t *testing.T) {
 	}
 }
 
-// shippedShape lists every path Fake accepts, one per line. A category-level template
-// carries its format, and each of its columns its datatype and whether it may be null.
+// shippedShape lists every path Fake accepts, one per line. A category carries the
+// categories it references, a category-level template its format, and each of its
+// columns its datatype and whether it may be null.
 func shippedShape(f *Generator) string {
 	facts := map[string]string{}
 	var walk func(prefix string, n node)
@@ -44,8 +46,10 @@ func shippedShape(f *Generator) string {
 			for _, name := range sortedNames(n.children) {
 				walk(join(prefix, name), n.children[name])
 			}
+		case *choice:
+			facts[prefix] = reads(n)
 		case *template:
-			facts[prefix] = "\tformat " + strconv.Quote(n.format)
+			facts[prefix] = "\tformat " + strconv.Quote(n.format) + reads(n)
 			if _, columns, err := recordOf(n); err == nil {
 				for _, c := range columns {
 					fact := "\t" + c.DataType.String()
@@ -66,3 +70,49 @@ func shippedShape(f *Generator) string {
 	}
 	return b.String()
 }
+
+// reads names the categories any template under n references, sorted.
+func reads(n node) string {
+	set := map[string]bool{}
+	var collect func(node)
+	collect = func(n node) {
+		switch n := n.(type) {
+		case *choice:
+			for _, it := range n.items {
+				collect(it)
+			}
+		case *template:
+			for _, b := range n.refs {
+				set[strings.TrimPrefix(b.key, "/")] = true
+			}
+			for name, field := range n.fields {
+				if !isRef(name) {
+					collect(field)
+				}
+			}
+		}
+	}
+	collect(n)
+	if len(set) == 0 {
+		return ""
+	}
+	keys := make([]string, 0, len(set))
+	for k := range set {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	return "\treads " + strings.Join(keys, " ")
+}
+
+func TestShippedShapeNamesReads(t *testing.T) {
+	f := newGenerator(t, writeData(t, map[string]string{
+		"a":     `{"format":"{x}","x":["{/b}",{"format":"{/c.v}","weight":2}]}`,
+		"b":     `"y"`,
+		"c":     `{"format":"{v}","v":["z","w"]}`,
+		"d/pos": `["{/b}","q"]`,
+	}))
+	want := "a\tformat \"{x}\"\treads b c\na.x\tstring\nb\tformat \"y\"\nc\tformat \"{v}\"\nc.v\tstring\nd.pos\treads b\n"
+	if got := shippedShape(f); got != want {
+		t.Fatalf("shippedShape =\n%s\nwant\n%s", got, want)
+	}
+}