patch: only defer the writes which need deferring#93
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Every regular write for a Git patch was held back until the whole input had been read, so a later patch in the same input could not see what an earlier one had written. Two commits touching the same file could then fail to apply, and worse, the second patch then committed the file it had read unchanged, silently undoing the first. Only a rename or a copy needs to be held back, so that two renames which swap a pair of files both read the original content. Install everything else straight away.
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Every regular write for a Git patch was held back until the whole input had been read, so a later patch in the same input could not see what an earlier one had written. Two commits touching the same file could then fail to apply, and worse, the second patch then committed the file it had read unchanged, silently undoing the first.
Only a rename or a copy needs to be held back, so that two renames which swap a pair of files both read the original content. Install everything else straight away.