core: don't check any parts of a computed set in InstanceDiff.Same #7205
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When checking for "same" values in a computed hash, not only might some of the values differ between versions changing the hash, but there may be fields not included at all in the original map, and different overall counts. Instead of trying to match individual set fields with different hashes, remove any hashed key longer than the computed key with the same base name.
| parts := strings.Split(k, ".") | ||
| parts2 := strings.Split(k, ".") | ||
| parts2 := append([]string(nil), parts...) |
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The append with []string(nil) base is a new one on me - looks like it makes sure parts2 is a freshly allocated slice?
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yup! equivalent to parts2 := make([]string, len(parts)); copy(parts2, parts)
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After chatting on phone about detail - this LGTM! |
This was referenced Jun 20, 2016
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When checking for "same" values in a computed hash, not only might some
of the values differ between versions changing the hash, but there may be
fields not included at all in the original map, and different overall
counts.
Instead of trying to match individual set fields with different hashes,
remove any hashed key longer than the computed key with the same base
name.
Fixes #2027 (and hopefully a number of other "diffs didn't match during apply" issues)