39 lines
1.5 KiB
Go
39 lines
1.5 KiB
Go
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package customdiff
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import (
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"github.com/hashicorp/terraform/helper/schema"
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)
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// ValueChangeValidationFunc is a function type that validates the difference
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// (or lack thereof) between two values, returning an error if the change
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// is invalid.
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type ValueChangeValidationFunc func(old, new, meta interface{}) error
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// ValueValidationFunc is a function type that validates a particular value,
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// returning an error if the value is invalid.
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type ValueValidationFunc func(value, meta interface{}) error
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// ValidateChange returns a CustomizeDiffFunc that applies the given validation
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// function to the change for the given key, returning any error produced.
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func ValidateChange(key string, f ValueChangeValidationFunc) schema.CustomizeDiffFunc {
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return func(d *schema.ResourceDiff, meta interface{}) error {
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old, new := d.GetChange(key)
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return f(old, new, meta)
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}
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}
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// ValidateValue returns a CustomizeDiffFunc that applies the given validation
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// function to value of the given key, returning any error produced.
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//
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// This should generally not be used since it is functionally equivalent to
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// a validation function applied directly to the schema attribute in question,
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// but is provided for situations where composing multiple CustomizeDiffFuncs
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// together makes intent clearer than spreading that validation across the
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// schema.
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func ValidateValue(key string, f ValueValidationFunc) schema.CustomizeDiffFunc {
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return func(d *schema.ResourceDiff, meta interface{}) error {
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val := d.Get(key)
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return f(val, meta)
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}
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}
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