revlog: fix revlogio.packentry corner case
We want to store version information about the revlog in the first
entry of its index. The code in packentry was using some heuristics
to detect whether this was the first entry, but these heuristics could
fail in some cases (e.g. rev 0 was empty; rev 1 descends directly from
the nullid and is stored as a delta).
We now give the revision number to packentry to avoid heuristics.
% new file
applying patch from stdin
% new empty file
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% chmod +x
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% copy
applying patch from stdin
a
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% rename
applying patch from stdin
copyx
empty
new
rename
% delete
applying patch from stdin
empty
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rename
% regular diff
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% copy and modify
applying patch from stdin
a
a
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% rename and modify
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% one file renamed multiple times
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9 rename2 rename3 rename3-2 / rename3 (rename2)rename3-2 (rename2)
rename3
rename3-2
a
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a
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a
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a
% binary files and regular patch hunks
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foo
045c85ba38952325e126c70962cc0f9d9077bc67 644 binary
% many binary files
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045c85ba38952325e126c70962cc0f9d9077bc67 644 mbinary1
a874b471193996e7cb034bb301cac7bdaf3e3f46 644 mbinary2
% filenames with spaces
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foo