update-ref: fail create operation over stdin if ref already exists
Signed-off-by: Aman Gupta <aman@tmm1.net> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Acked-by: Brad King <brad.king@kitware.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -147,6 +147,7 @@ static void parse_cmd_create(const char *next)
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struct ref_update *update;
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update = update_alloc();
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update->have_old = 1;
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if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
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update_store_ref_name(update, ref.buf);
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@ -820,7 +820,18 @@ test_expect_success 'stdin -z update ref fails with bad old value' '
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test_must_fail git rev-parse --verify -q $c
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'
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test_expect_success 'stdin -z create ref fails when ref exists' '
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git update-ref $c $m &&
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git rev-parse "$c" >expect &&
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printf $F "create $c" "$m~1" >stdin &&
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test_must_fail git update-ref -z --stdin <stdin 2>err &&
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grep "fatal: Cannot lock the ref '"'"'$c'"'"'" err &&
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git rev-parse "$c" >actual &&
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test_cmp expect actual
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'
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test_expect_success 'stdin -z create ref fails with bad new value' '
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git update-ref -d "$c" &&
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printf $F "create $c" "does-not-exist" >stdin &&
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test_must_fail git update-ref -z --stdin <stdin 2>err &&
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grep "fatal: invalid new value for ref $c: does-not-exist" err &&
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