recipe: a recipe can build on a preset, on the command line and on the batch screen by donislawdev · Pull Request #119 · donislawdev/TestingFilesGenerator

donislawdev · 2026-09-22T09:27:32Z

What

extends: preset:<id> and with: - the two recipe keys the reader used to refuse as "not in this build yet" - now work, on the command line and on the desktop window's batch screen. Step 2 of docs/FEATURE-PLAN-2026-09-22.md, analysis and the owner's three decisions in docs/EXTENDS-WITH-2026-09-22.md.

version: 1
seed: 7
extends: preset:size-boundaries
with:
  limit: 5mb
  format: png
targets:
  - id: our-legacy-format
    format: tiff
    count: 1
    size: 3mb

The preset's targets come first and the file's own after them, so the file is the same run as tfg preset eject with the extra targets typed under it - byte for byte, and a guard runs both roads and compares the files. A target whose id the preset already uses is refused at the file's own line. with without extends is refused. extends names a preset and nothing else yet. A file with extends and no targets of its own is legal: a preset run committed to a repository.

How it is put together

The recipe package cannot expand a preset (the layer rule lets preset import recipe, not the other way). recipe.ExtensionOf says what a file builds on, recipe.ParseExtending reads it with the expansion in front of its targets, preset.ReadRecipe joins the two, and a guard holds cli and gui to reading files through that door.
The merge is at the raw level, before validation, so every rule about targets runs once. A refusal about the file's target carries its position in the file, not in the merged list.
recipe.CheckBase holds every preset to contributing version and targets and nothing else - guard first, then the change.
Refusals from the preset side become recipe problems addressed to extends or with.<name>, in four parts. This found a refused value arriving with no remedy (preset.Check now carries the declaration's).
run.preset in the manifest as for a --preset run, run.recipe_hash of the file as written (owner's decision), validate --json carries the same preset block.
Batch screen: section "Build on a preset" - a switch, the preset menu, the parameters drawn from the same declarations the preset screen draws. Parity 122 of 130.

Proof

Five guards, nine mutations, all caught: both roads give the same bytes with the manifest order asserted, the window gives the bytes the file gives, every preset contributes only targets (predicate self-tested on bases the tree does not have), every refusal names its line with all four parts, every file door is the one that knows presets. One more stored screen, recipe-on-a-preset.

Noticed and not changed

The batch screen's label switch starts off while the single batch screen and a recipe with no defaults have the label on - O231, the owner's call.

🤖 Generated with Claude Code

Summary by CodeRabbit

New Features
- Recipes can now extend presets using extends: preset:<id> and customize them with with parameters.
- Preset targets are included before recipe targets, with preset and parameter details recorded in manifests and validation output.
- The desktop recipe screen now supports selecting presets and configuring parameters.
Bug Fixes
- Added clear validation for unsupported extensions, duplicate targets, missing parameters, and invalid preset configurations.
Documentation
- Added guidance, examples, and rules for preset-based recipe inheritance.

…e batch screen extends: preset:<id> names a preset and with: fills its parameters, written the way the flags take them. The preset's targets come first and the file's own after them, so the file is the same run as "tfg preset eject" with the extra targets typed under it, byte for byte - PR5 in a second form, and a guard runs both roads and compares the files. A target whose id the preset already uses is refused at the file's own line, with without extends is refused, and extends names a preset and nothing else yet. A file with extends and no targets of its own is legal: it is a preset run committed to a repository. The owner's three decisions, in docs/EXTENDS-WITH-2026-09-22.md: the window in the same change, the recipe hash of the file as written, the clash addressed at the file's target. The recipe package cannot expand a preset - the layer rule lets preset import recipe and not the other way - so reading such a file is two steps with the expansion between them. recipe.ExtensionOf says what the file builds on, recipe.ParseExtending reads it with the expansion in front of its targets, and preset.ReadRecipe joins the two; a guard holds cli and gui to reading files through that door. The merge is at the raw level, before validation, so every rule about targets runs once where it lives, and a refusal about the file's target carries its position in the file, not in the merged list. recipe.CheckBase holds every preset to contributing a version and targets and nothing else, asked of each registered preset by a guard before any recipe builds on one. Refusals from the preset side become recipe problems addressed to extends or with.<name>, in four parts - which found a refused value arriving with no remedy, now carried from the declaration. The manifest records the preset under run.preset as a --preset run does, validate --json carries the same block, and the batch screen gains a section: a switch, the preset, and its parameters drawn from the declaration the preset screen already draws. Parity 122 of 130. Five guards, nine mutations, one more stored screen. Noticed on the way and recorded as O231, not changed: the batch screen's label switch starts off while the other two surfaces have the label on. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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📝 Walkthrough

Walkthrough

Recipes can now inherit from presets with extends and with. Preset targets are merged before recipe targets. CLI validation, manifests, JSON output, and the desktop batch screen expose preset expansion data.

Changes

Preset-Based Recipe Inheritance

Layer / File(s)	Summary
Recipe extension and validation contracts `internal/recipe/*`, `internal/preset/preset.go`, `README.md`, `CHANGELOG.md`	Recipes accept preset references and scalar parameters. Preset targets are validated and prepended to recipe targets. Duplicate IDs and invalid extension settings receive source-aware diagnostics.
Preset-aware loading and CLI reporting `internal/preset/read.go`, `internal/cli/*`, `internal/guard/extends_test.go`	Recipe loading expands presets and returns notes and metadata. CLI generation and validation record preset information in options, manifests, JSON reports, and text output.
Desktop preset selection and generation `internal/gui/window/`, `internal/gui/text/`, `internal/guard/testdata/screens/`, `internal/guard/_test.go`	The recipe screen adds an optional preset section, parameter controls, localized text, and preset-aware generation. Screen fixtures and guards cover the new controls and generation paths.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~60 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant RecipeFile
  participant preset.ReadRecipe
  participant CLI
  participant Manifest
  RecipeFile->>preset.ReadRecipe: provide extends and with
  preset.ReadRecipe->>CLI: return merged recipe and expansion
  CLI->>Manifest: record preset and parameters
  CLI-->>RecipeFile: report validation and generation results

sequenceDiagram
  participant BatchScreen
  participant RecipeBase
  participant preset.ReadRecipe
  BatchScreen->>RecipeBase: enable preset inheritance
  RecipeBase->>BatchScreen: provide preset and parameter fields
  BatchScreen->>preset.ReadRecipe: read composed recipe
  preset.ReadRecipe-->>BatchScreen: return expanded recipe and notes

Suggested labels: enhancement, ui, security

Merge Risk: 🟡 Moderate · up to dd5ff

The desktop workflow cannot generate recipes containing only a preset, and large extending recipes may noticeably lag during editing. These issues should be fixed before merging.

🚥 Pre-merge checks | ✅ 10 | ❌ 4

❌ Failed checks (4 warnings)

Check name	Status	Explanation	Resolution
No Obvious Performance Problems	⚠️ Warning	The PR adds avoidable heavy parsing on the UI thread for every typed character. `Fields.WhenTypedIn` calls `runner.recheck`, which synchronously calls `refreshLine` and `Recipe.settle`. `Recipe.settle…	Refactor the recipe-reading boundary so one settlement reuses one decoded source instead of calling `ExtensionOf` and then decoding the same bytes again. For extended recipes, also reuse the decoded recipe and decode the preset only once. T…
Safe File Parsing	⚠️ Warning	The new file path reaches an unbounded preset expansion. `preset.ReadRecipe` calls `recipe.ExtensionOf` and then `Expand(ext.Preset, Args(ext.With))` before `recipe.ParseExtending` can apply `recipe.M…	Bound preset expansion before allocation. Add a maximum for `with` parameter text and for `size-boundaries` spread entries, and make `expandSizeBoundaries`/`render` return a validation error when the target count or generated YAML would exc…
Clear User-Facing Text	⚠️ Warning	An invalid `with.spread` value can produce an error with no actionable fix. `preset.ReadRecipe` maps the `PropertyValueError` from `sizeboundaries.parseSpread` into a recipe problem and copies `value.…	Give `badSpread` a concrete remedy, such as: `write a comma-separated list of positive, distinct sizes such as 1B, 1kb, 1mb, or leave the line out`. Also keep a non-empty fallback in `aboutTheFile` for any preset `PropertyValueError` whose …
No Resource Leaks	⚠️ Warning	The PR adds an event-handler leak in the recipe batch screen. `rebuild()` now calls `baseSection()` on every rebuild (`internal/gui/window/recipe.go:309-317`). `baseSection()` registers the persistent…	Make field listener registration lifecycle-safe. Register each persistent base control only once, or add explicit unsubscribe/reset support to `Fields.listen` and call it before `baseSection()` is rebuilt. Do not chain a new `OnChanged` clo…

✅ Passed checks (10 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main user-facing change: recipes can build on presets through the command line and batch screen. It is specific and suitable for release notes.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Tests For Changed Behavior	✅ Passed	The PR adds non-UI runtime behavior for preset-backed recipes, and it adds tests that cover it. `internal/guard/extends_test.go` verifies preset validation, CLI generation and manifest metadata, GUI/f…
No Secrets Or Debug Leftovers	✅ Passed	No prohibited secret or debug leftover was introduced. The authoritative diff adds no CLAUDE.md, AGENTS.md, .claude, or .env path. Scans of added text and changed binary/XML content found no credentia…
No Hardcoded Ui Styling	✅ Passed	The PR changes Fyne UI code, but it does not add hardcoded styling. New controls use shared helpers such as `parts.Section`, `parts.NewToggle`, `parts.NewChooser`, `parts.ShapedFor`, and `parts.FieldC…
Desktop Robustness	✅ Passed	PASS — The changed desktop code adds in-memory preset controls and calls `preset.ReadRecipe`; it does not add asset loading, settings-file writes, culture-dependent number/date handling, network calls…
System Changes Are Reversible	✅ Passed	PASS: The PR changes recipe parsing, preset expansion, manifest reporting, localization, and batch-screen UI. The authoritative diff contains no changes to network filters/rules, proxies, firewalls, s…
Scope, Duplication And Docs	✅ Passed	The changed scope matches the stated preset-inheritance feature. The PR updates README.md and CHANGELOG.md with recipe syntax, preset merging, manifest fields, CLI restrictions, and batch-screen behav…

Full details: No Obvious Performance Problems

Explanation

The PR adds avoidable heavy parsing on the UI thread for every typed character. Fields.WhenTypedIn calls runner.recheck, which synchronously calls refreshLine and Recipe.settle. Recipe.settle now calls preset.ReadRecipe. ReadRecipe first calls recipe.ExtensionOf, which fully decodes the source, and then decodes it again through recipe.Parse for standalone recipes or ParseExtending for extended recipes. The changed code therefore adds a full YAML decode to every keystroke, and extended recipes decode the recipe source again plus the expanded preset. The parser documents about 1.02 seconds for a 949 kB recipe and 841 ms validation for a 900 kB recipe. This is a concrete UI responsiveness problem for the supported recipe size, not a speculative micro-optimization.

Resolution

Refactor the recipe-reading boundary so one settlement reuses one decoded source instead of calling ExtensionOf and then decoding the same bytes again. For extended recipes, also reuse the decoded recipe and decode the preset only once. Then avoid running large YAML validation synchronously from runner.recheck: debounce validation or move the expensive settle/validation work to the existing worker path, and apply results on the UI thread. Keep the lightweight status update responsive while typing.

Full details: Safe File Parsing

Explanation

The new file path reaches an unbounded preset expansion. preset.ReadRecipe calls recipe.ExtensionOf and then Expand(ext.Preset, Args(ext.With)) before recipe.ParseExtending can apply recipe.MaxBytes (internal/preset/read.go:48-65). The registered size-boundaries preset accepts arbitrary PropertyText for with.spread; parseSpread stores every comma-separated value and render emits two targets per value without a count or output-size limit (internal/preset/sizeboundaries.go:89-131, 158-211, 279-306). A recipe near the 1 MiB input limit can therefore request about 145,000 distinct offsets, causing about 290,000 generated targets and roughly 40 MiB of generated YAML before ParseExtending rejects the expanded source as over recipe.MaxBytes. This is a new denial-of-service path for recipe files. The normal parser has byte and nesting guards, but those guards do not bound preset-generated data.

Resolution

Bound preset expansion before allocation. Add a maximum for with parameter text and for size-boundaries spread entries, and make expandSizeBoundaries/render return a validation error when the target count or generated YAML would exceed the recipe limits. Prefer a bounded writer or a preflight size calculation, rather than building the full []byte first. Keep recipe.ParseExtending as a second defense, but do not rely on it after preset.Expand has already created the unbounded source.

Full details: Clear User-Facing Text

Explanation

An invalid with.spread value can produce an error with no actionable fix. preset.ReadRecipe maps the PropertyValueError from sizeboundaries.parseSpread into a recipe problem and copies value.Instead() into Problem.Fix (internal/preset/read.go:109-116). The preset’s badSpread constructor leaves Remedy empty (internal/preset/sizeboundaries.go:70-73), because spread is free text and validation occurs during expansion. Problem.InTheWordsOf always prints the fix line (internal/recipe/errors.go:50-55), so the recipe error ends with a blank . instead of telling the user how to correct with.spread. The new recipe-reading path makes this user-facing error reachable.

Resolution

Give badSpread a concrete remedy, such as: write a comma-separated list of positive, distinct sizes such as 1B, 1kb, 1mb, or leave the line out. Also keep a non-empty fallback in aboutTheFile for any preset PropertyValueError whose Remedy is empty, so no mapped recipe error renders a blank fix line.

Full details: No Resource Leaks

Explanation

The PR adds an event-handler leak in the recipe batch screen. rebuild() now calls baseSection() on every rebuild (internal/gui/window/recipe.go:309-317). baseSection() registers the persistent r.base.on, r.base.pick, and preset parameter controls through Fields.Add (internal/gui/window/recipebase.go:92-107). Fields.listen wraps each existing OnChanged callback instead of replacing or unsubscribing it (internal/gui/parts/fields.go:325-360). Fields.KeepFirst(0) only drops registry entries and does not remove these wrappers (internal/gui/parts/fields.go:428-447). Therefore repeated preset toggles, preset changes, or other rebuilds create an unbounded callback chain on the same controls. Each later change retains and invokes all old handlers.

Resolution

Make field listener registration lifecycle-safe. Register each persistent base control only once, or add explicit unsubscribe/reset support to Fields.listen and call it before baseSection() is rebuilt. Do not chain a new OnChanged closure onto the same r.base.on, r.base.pick, or parameter control on every rebuild. Ensure discarded controls and their handlers are released when the selected preset changes.

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Actionable comments posted: 4

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🤖 Prompt to fix review comments

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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@internal/gui/text/locale/en.json`:
- Line 68: Update the localized strings for DetailBasePreset,
DetailBuildOnPreset, and NoteBase, plus their matching fallback strings in
screens.go, to describe the actual preset selection and switch behavior without
“extends” jargon or internal names. State that empty settings use defaults and
are recorded, and distinguish running the selected preset first from running
only the listed batches when the switch is off.

In `@internal/gui/window/recipe.go`:
- Line 191: Update the recipe batch initialization and removal flow around
NewRecipe, removeBatch, and draft so a recipe with Start from a preset enabled
can contain no batches, while retaining partially completed batches and existing
behavior otherwise. Add coverage that generates an extends-only recipe and
verifies its preset files and manifest metadata.

In `@internal/recipe/extends.go`:
- Around line 118-130: Reuse the decoded document produced by ExtensionOf when
ReadRecipe parses an extending recipe, instead of passing src to ParseExtending
and decoding it again. Add a recipe-package entry point such as
ParseExtendingDecoded that accepts an opaque decoded-document handle stored
behind the returned Extension, while preserving the existing base decoding and
validation behavior.

In `@internal/recipe/recipe.go`:
- Around line 462-466: Update the extends refusal flow around refuseUnsupported
and validate so a recipe with an extends reference and no locally merged targets
produces only the preset-targets refusal, not the contradictory len(raw.Targets)
== 0 refusal. Propagate an explicit refusal result or state from the ext
handling near raw.extension(p), and have validate skip its empty-targets check
when that state is set.

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📥 Commits

Reviewing files that changed from the base of the PR and between 350dd52 and dd5ffca.

⛔ Files ignored due to path filters (6)

internal/guard/testdata/screens/recipe-contents.png is excluded by !**/*.png, !**/*.png
internal/guard/testdata/screens/recipe-on-a-preset.png is excluded by !**/*.png, !**/*.png
internal/guard/testdata/screens/recipe-refused-with-one-batch-filled.png is excluded by !**/*.png, !**/*.png
internal/guard/testdata/screens/recipe-refused.png is excluded by !**/*.png, !**/*.png
internal/guard/testdata/screens/recipe-two-batches.png is excluded by !**/*.png, !**/*.png
internal/guard/testdata/screens/recipe.png is excluded by !**/*.png, !**/*.png

📒 Files selected for processing (28)

CHANGELOG.md
README.md
internal/cli/generate.go
internal/cli/preset.go
internal/cli/presetcmd.go
internal/cli/recipecmd.go
internal/guard/extends_test.go
internal/guard/guitext_test.go
internal/guard/parity_test.go
internal/guard/screenpixels_test.go
internal/guard/settingslot_test.go
internal/guard/testdata/screens/recipe-contents.xml
internal/guard/testdata/screens/recipe-on-a-preset.xml
internal/guard/testdata/screens/recipe-refused-with-one-batch-filled.xml
internal/guard/testdata/screens/recipe-refused.xml
internal/guard/testdata/screens/recipe-two-batches.xml
internal/guard/testdata/screens/recipe.xml
internal/gui/text/locale/en.json
internal/gui/text/screens.go
internal/gui/window/recipe.go
internal/gui/window/recipebase.go
internal/preset/preset.go
internal/preset/read.go
internal/recipe/compose.go
internal/recipe/errors.go
internal/recipe/extends.go
internal/recipe/recipe.go
internal/recipe/target.go

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