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1#!/bin/sh
2#
3# Copyright (c) 2022 Han Xin
4#
5
6test_description='git unpack-objects with large objects'
7
8. ./test-lib.sh
9
10prepare_dest () {
11 test_when_finished "rm -rf dest.git" &&
12 git init --bare dest.git &&
13 git -C dest.git config core.bigFileThreshold "$1"
14}
15
16test_expect_success "create large objects (1.5 MB) and PACK" '
17 test-tool genrandom foo 1500000 >big-blob &&
18 test_commit --append foo big-blob &&
19 test-tool genrandom bar 1500000 >big-blob &&
20 test_commit --append bar big-blob &&
21 PACK=$(echo HEAD | git pack-objects --revs pack) &&
22 git verify-pack -v pack-$PACK.pack >out &&
23 sed -n -e "s/^\([0-9a-f][0-9a-f]*\).*\(commit\|tree\|blob\).*/\1/p" \
24 <out >obj-list
25'
26
27test_expect_success 'set memory limitation to 1MB' '
28 GIT_ALLOC_LIMIT=1m &&
29 export GIT_ALLOC_LIMIT
30'
31
32test_expect_success 'unpack-objects failed under memory limitation' '
33 prepare_dest 2m &&
34 test_must_fail git -C dest.git unpack-objects <pack-$PACK.pack 2>err &&
35 grep "fatal: attempting to allocate" err
36'
37
38test_expect_success 'unpack-objects works with memory limitation in dry-run mode' '
39 prepare_dest 2m &&
40 git -C dest.git unpack-objects -n <pack-$PACK.pack &&
41 test_stdout_line_count = 0 find dest.git/objects -type f &&
42 test_dir_is_empty dest.git/objects/pack
43'
44
45test_expect_success 'unpack big object in stream' '
46 prepare_dest 1m &&
47 git -C dest.git unpack-objects <pack-$PACK.pack &&
48 test_dir_is_empty dest.git/objects/pack
49'
50
51check_fsync_events () {
52 local trace="$1" &&
53 shift &&
54
55 cat >expect &&
56 sed -n \
57 -e '/^{"event":"counter",.*"category":"fsync",/ {
58 s/.*"category":"fsync",//;
59 s/}$//;
60 p;
61 }' \
62 <"$trace" >actual &&
63 test_cmp expect actual
64}
65
66BATCH_CONFIGURATION='-c core.fsync=loose-object -c core.fsyncmethod=batch'
67
68test_expect_success 'unpack big object in stream (core.fsyncmethod=batch)' '
69 prepare_dest 1m &&
70 GIT_TRACE2_EVENT="$(pwd)/trace2.txt" \
71 GIT_TEST_FSYNC=true \
72 git -C dest.git $BATCH_CONFIGURATION unpack-objects <pack-$PACK.pack &&
73 if grep "core.fsyncMethod = batch is unsupported" trace2.txt
74 then
75 flush_count=7
76 else
77 flush_count=1
78 fi &&
79 check_fsync_events trace2.txt <<-EOF &&
80 "name":"writeout-only","count":6
81 "name":"hardware-flush","count":$flush_count
82 EOF
83
84 test_dir_is_empty dest.git/objects/pack &&
85 git -C dest.git cat-file --batch-check="%(objectname)" <obj-list >current &&
86 cmp obj-list current
87'
88
89test_expect_success 'do not unpack existing large objects' '
90 prepare_dest 1m &&
91 git -C dest.git index-pack --stdin <pack-$PACK.pack &&
92 git -C dest.git unpack-objects <pack-$PACK.pack &&
93
94 # The destination came up with the exact same pack...
95 DEST_PACK=$(echo dest.git/objects/pack/pack-*.pack) &&
96 cmp pack-$PACK.pack $DEST_PACK &&
97
98 # ...and wrote no loose objects
99 test_stdout_line_count = 0 find dest.git/objects -type f ! -name "pack-*"
100'
101
102test_done