fix merge struct issues #29
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* prefer `figtree:"name=value"` tag for field names. * prevent duplicate conflicts between yaml names and struct field names.
aaronlehmann
approved these changes
Jun 19, 2025
figtree.go
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| case aOk && bOk: | ||
| // if both defined, pick the first one | ||
| resultTag = append(resultTag, fmt.Sprintf("%s:%q", tag, aTag)) |
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This seems redundant with case aOk below
figtree.go
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| if prev, ok := seen[value.Name]; ok { | ||
| // we have a duplicate field name, this should not happen | ||
| // but if it does, we will just skip it | ||
| fmt.Fprintf(os.Stderr, "Duplicate field name %q in merge struct.\n\tOld: %s %s `%s`\n\tNew: %s %s `%s`\n", value.Name, prev.Name, prev.Type.String(), prev.Tag, value.Name, value.Type.String(), value.Tag) |
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Is this debugging code? Not sure we want figtree to print to os.Stderr on its own accord. I'd suggest either:
- A panic if this shouldn't be possible to trigger
- Silently ignored if it can happen but isn't actionable
- Pass in a logger if it's something we want to bubble up non-fatally
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I ended up converting these to panics. The reflect.MakeStruct call will panic below if we have duplicate fields, so better to panic here with slightly friendlier output.
figtree.go
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| if prev, ok := yamlSeen[yamlName]; yamlName != "" && ok { | ||
| // we have a duplicate field name, this should not happen | ||
| // but if it does, we will just skip it | ||
| fmt.Fprintf(os.Stderr, "Duplicate YAML tag %q in merge struct.\n\tOld: %s %s `%s`\n\tNew: %s %s `%s`\n", yamlName, prev.Name, prev.Type.String(), prev.Tag, value.Name, value.Type.String(), value.Tag) |
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Same concern about printing to stderr
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Optiontypes, select the type that both merge types are assignable to (ieOption[string]vsOption[any],Option[any]will be chosen).figtree:"name=value"tag for field names.