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feat(formula): Add inline step expansion (gt-8tmz.35)

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Steps can now declare their own expansion using the Expand field:

  steps:
    - id: design
      expand: rule-of-five
      expand_vars:
        iterations: 3

This is more convenient than compose.expand for single-step expansions.
The step is replaced by the expansion template with variables substituted.

Reuses existing expandStep() and mergeVars() from gt-8tmz.34.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Steve Yegge
2025-12-25 20:46:12 -08:00
parent f82c75c39e
commit e91f0de8d1
2 changed files with 95 additions and 0 deletions
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16
cmd/bd/cook.go
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@@ -157,6 +157,15 @@ func runCook(cmd *cobra.Command, args []string) {
resolved.Steps = formula.ApplyAdvice(resolved.Steps, resolved.Advice)
}
// Apply inline step expansions (gt-8tmz.35)
// This processes Step.Expand fields before compose.expand/map rules
inlineExpandedSteps, err := formula.ApplyInlineExpansions(resolved.Steps, parser)
if err != nil {
fmt.Fprintf(os.Stderr, "Error applying inline expansions: %v\n", err)
os.Exit(1)
}
resolved.Steps = inlineExpandedSteps
// Apply expansion operators (gt-8tmz.3)
if resolved.Compose != nil && (len(resolved.Compose.Expand) > 0 || len(resolved.Compose.Map) > 0) {
expandedSteps, err := formula.ApplyExpansions(resolved.Steps, resolved.Compose, parser)
@@ -586,6 +595,13 @@ func resolveAndCookFormula(formulaName string, searchPaths []string) (*TemplateS
resolved.Steps = formula.ApplyAdvice(resolved.Steps, resolved.Advice)
}
// Apply inline step expansions (gt-8tmz.35)
inlineExpandedSteps, err := formula.ApplyInlineExpansions(resolved.Steps, parser)
if err != nil {
return nil, fmt.Errorf("applying inline expansions to %q: %w", formulaName, err)
}
resolved.Steps = inlineExpandedSteps
// Apply expansion operators (gt-8tmz.3)
if resolved.Compose != nil && (len(resolved.Compose.Expand) > 0 || len(resolved.Compose.Map) > 0) {
expandedSteps, err := formula.ApplyExpansions(resolved.Steps, resolved.Compose, parser)