terraform: comments, and better
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@ -92,10 +92,19 @@ func (ctx *BuiltinEvalContext) init() {
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}
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}
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// pathCacheKey returns a cache key for the current module path, unique to
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// the module path.
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//
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// This is used because there is a variety of information that needs to be
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// cached per-path, rather than per-context.
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func (ctx *BuiltinEvalContext) pathCacheKey() string {
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// There is probably a better way to do this, but this is working for now.
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// We just create an MD5 hash of all the MD5 hashes of all the path
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// elements. This gets us the property that it is unique per ordering.
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hash := md5.New()
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for _, p := range ctx.Path() {
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if _, err := hash.Write([]byte(p)); err != nil {
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single := md5.Sum([]byte(p))
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if _, err := hash.Write(single[:]); err != nil {
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panic(err)
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}
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}
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