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t/test-lib: introduce ZERO_OID

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Currently we have a variable, $_z40, which contains the all-zero object
ID.  However, with NewHash, we'll have an all-zero object ID which is
longer than 40 hex characters.  In such a case, $_z40 will be a
confusing name.  Create a $ZERO_OID variable which will always reflect
the all-zeros object ID, regardless of the length of the current hash.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2018-05-13 02:24:12 +00:00 committed by Junio C Hamano
parent d16ab63429
commit 198857bf7e
1 changed files with 2 additions and 1 deletions
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t/test-lib.sh
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@ -184,6 +184,7 @@ _x40="$_x35$_x05"
# Zero SHA-1
_z40=0000000000000000000000000000000000000000
ZERO_OID=$_z40
EMPTY_TREE=4b825dc642cb6eb9a060e54bf8d69288fbee4904
EMPTY_BLOB=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
@ -195,7 +196,7 @@ LF='
# when case-folding filenames
u200c=$(printf '\342\200\214')
export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB
export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB ZERO_OID
# Each test should start with something like this, after copyright notices:
#