Re: [PATCH v2 11/22] t5302: make hash size independent

> On Sat, 25 Jan 2020, brian m. carlson wrote:
> 
> > Compute the length of object IDs and pack offsets instead of hard-coding
> > constants.
> >
> > Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> > ---
> >  t/t5302-pack-index.sh | 18 +++++++++++-------
> >  1 file changed, 11 insertions(+), 7 deletions(-)
> >
> > diff --git a/t/t5302-pack-index.sh b/t/t5302-pack-index.sh
> > index 91d51b35f9..93ac003639 100755
> > --- a/t/t5302-pack-index.sh
> > +++ b/t/t5302-pack-index.sh
> > @@ -8,7 +8,8 @@ test_description='pack index with 64-bit offsets and object CRC'
> >
> >  test_expect_success \
> >      'setup' \
> > -    'rm -rf .git &&
> > +    'test_oid_init &&
> > +     rm -rf .git &&
> 
> Why not consolidate the `test_expect_success` line into the current
> convention at the same time ("while at it")? I.e.
> 
> 	test_expect_success 'setup' '

> >       git init &&
> >       git config pack.threads 1 &&
> >       i=1 &&
> > @@ -32,7 +33,9 @@ test_expect_success \
> >  	 echo $tree &&
> >  	 git ls-tree $tree | sed -e "s/.* \\([0-9a-f]*\\)	.*/\\1/"
> >       } >obj-list &&
> > -     git update-ref HEAD $commit'
> > +     git update-ref HEAD $commit &&
> > +     rawsz=$(test_oid rawsz)
> 
> Since the `rawsz` assignment has a lot to do with `test_oid_init`, I would
> coddle this added line with the `test_oid_init` line above instead of
> adding it here.

> > +'
> >
> >  test_expect_success \
> >      'pack-objects with index version 1' \
> > @@ -152,6 +155,7 @@ test_expect_success \
> >      '[index v1] 2) create a stealth corruption in a delta base reference' \
> >      '# This test assumes file_101 is a delta smaller than 16 bytes.
> >       # It should be against file_100 but we substitute its base for file_099
> > +     offset=$((rawsz + 4)) &&
> >       sha1_101=$(git hash-object file_101) &&
> >       sha1_099=$(git hash-object file_099) &&
> >       offs_101=$(index_obj_offset 1.idx $sha1_101) &&
> > @@ -159,8 +163,8 @@ test_expect_success \
> >       chmod +w ".git/objects/pack/pack-${pack1}.pack" &&
> >       dd of=".git/objects/pack/pack-${pack1}.pack" seek=$(($offs_101 + 1)) \
> >          if=".git/objects/pack/pack-${pack1}.idx" \
> > -        skip=$((4 + 256 * 4 + $nr_099 * 24)) \
> > -        bs=1 count=20 conv=notrunc &&
> > +        skip=$((4 + 256 * 4 + $nr_099 * offset)) \
> > +        bs=1 count=$rawsz conv=notrunc &&
> 
> Similarly, the `offset` variable is only used here, so I would assign it
> just before the `dd` call. The name `offset` might be a bit to generic not
> to be reused, either, maybe `recordsz` or `index_entry_size` or `entrysz`?