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generaldelta: initialize basecache properly...

generaldelta: initialize basecache properly Previously basecache was incorrectly initialized before adding the first revision from a changegroup. Basecache value influences when full revisions are stored in revlog (when using generaldelta). As a result it was possible to generate a generaldelta-revlog that could be bigger by arbitrary factor than its non-generaldelta equivalent.

Wojciech Lopata - - Load All Authors

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             test-generaldelta.t
        
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      Check whether size of generaldelta revlog is not bigger than its

      regular equivalent. Test would fail if generaldelta was naive

      implementation of parentdelta: third manifest revision would be fully

      inserted due to big distance from its paren revision (zero).

        $ hg init repo

        $ cd repo

        $ echo foo > foo

        $ echo bar > bar

        $ hg commit -q -Am boo

        $ hg clone --pull . ../gdrepo -q --config format.generaldelta=yes

        $ for r in 1 2 3; do

        >   echo $r > foo

        >   hg commit -q -m $r

        >   hg up -q -r 0

        >   hg pull . -q -r $r -R ../gdrepo

        > done

        $ cd ..

        $ regsize=`du -s -b repo/.hg/store/00manifest.i | cut -f 1`

        $ gdsize=`du -s -b gdrepo/.hg/store/00manifest.i | cut -f 1`

        $ if ((regsize < gdsize)); then

        >   echo 'generaldelta increased size of a revlog!'

        > fi

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				Check whether size of generaldelta revlog is not bigger than its
				regular equivalent. Test would fail if generaldelta was naive
				implementation of parentdelta: third manifest revision would be fully
				inserted due to big distance from its paren revision (zero).

				$ hg init repo
				$ cd repo
				$ echo foo > foo
				$ echo bar > bar
				$ hg commit -q -Am boo
				$ hg clone --pull . ../gdrepo -q --config format.generaldelta=yes
				$ for r in 1 2 3; do
				> echo $r > foo
				> hg commit -q -m $r
				> hg up -q -r 0
				> hg pull . -q -r $r -R ../gdrepo
				> done
				$ cd ..
				$ regsize=`du -s -b repo/.hg/store/00manifest.i \| cut -f 1`
				$ gdsize=`du -s -b gdrepo/.hg/store/00manifest.i \| cut -f 1`
				$ if ((regsize < gdsize)); then
				> echo 'generaldelta increased size of a revlog!'
				> fi