tvl-depot/third_party/git/t/t5309-pack-delta-cycles.sh
Vincent Ambo f4609b896f merge(3p/git): Merge git subtree at v2.29.2
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
2020-11-21 19:45:56 +01:00

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#!/bin/sh
test_description='test index-pack handling of delta cycles in packfiles'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-pack.sh
# Two similar-ish objects that we have computed deltas between.
A=$(test_oid packlib_7_0)
B=$(test_oid packlib_7_76)
# double-check our hand-constucted packs
test_expect_success 'index-pack works with a single delta (A->B)' '
clear_packs &&
{
pack_header 2 &&
pack_obj $A $B &&
pack_obj $B
} >ab.pack &&
pack_trailer ab.pack &&
git index-pack --stdin <ab.pack &&
git cat-file -t $A &&
git cat-file -t $B
'
test_expect_success 'index-pack works with a single delta (B->A)' '
clear_packs &&
{
pack_header 2 &&
pack_obj $A &&
pack_obj $B $A
} >ba.pack &&
pack_trailer ba.pack &&
git index-pack --stdin <ba.pack &&
git cat-file -t $A &&
git cat-file -t $B
'
test_expect_success 'index-pack detects missing base objects' '
clear_packs &&
{
pack_header 1 &&
pack_obj $A $B
} >missing.pack &&
pack_trailer missing.pack &&
test_must_fail git index-pack --fix-thin --stdin <missing.pack
'
test_expect_success 'index-pack detects REF_DELTA cycles' '
clear_packs &&
{
pack_header 2 &&
pack_obj $A $B &&
pack_obj $B $A
} >cycle.pack &&
pack_trailer cycle.pack &&
test_must_fail git index-pack --fix-thin --stdin <cycle.pack
'
test_expect_success 'failover to an object in another pack' '
clear_packs &&
git index-pack --stdin <ab.pack &&
test_must_fail git index-pack --stdin --fix-thin <cycle.pack
'
test_expect_success 'failover to a duplicate object in the same pack' '
clear_packs &&
{
pack_header 3 &&
pack_obj $A $B &&
pack_obj $B $A &&
pack_obj $A
} >recoverable.pack &&
pack_trailer recoverable.pack &&
test_must_fail git index-pack --fix-thin --stdin <recoverable.pack
'
test_done