394b169eada7968875e931c5a43f25a808cfc18f
[git/git.git] / t / t6501-freshen-objects.sh
1 #!/bin/sh
2 #
3 # This test covers the handling of objects which might have old
4 # mtimes in the filesystem (because they were used previously)
5 # and are just now becoming referenced again.
6 #
7 # We're going to do two things that are a little bit "fake" to
8 # help make our simulation easier:
9 #
10 # 1. We'll turn off reflogs. You can still run into
11 # problems with reflogs on, but your objects
12 # don't get pruned until both the reflog expiration
13 # has passed on their references, _and_ they are out
14 # of prune's expiration period. Dropping reflogs
15 # means we only have to deal with one variable in our tests,
16 # but the results generalize.
17 #
18 # 2. We'll use a temporary index file to create our
19 # works-in-progress. Most workflows would mention
20 # referenced objects in the index, which prune takes
21 # into account. However, many operations don't. For
22 # example, a partial commit with "git commit foo"
23 # will use a temporary index. Or they may not need
24 # an index at all (e.g., creating a new commit
25 # to refer to an existing tree).
26
27 test_description='check pruning of dependent objects'
28 . ./test-lib.sh
29
30 # We care about reachability, so we do not want to use
31 # the normal test_commit, which creates extra tags.
32 add () {
33 echo "$1" >"$1" &&
34 git add "$1"
35 }
36 commit () {
37 test_tick &&
38 add "$1" &&
39 git commit -m "$1"
40 }
41
42 maybe_repack () {
43 if test -n "$repack"; then
44 git repack -ad
45 fi
46 }
47
48 for repack in '' true; do
49 title=${repack:+repack}
50 title=${title:-loose}
51
52 test_expect_success "make repo completely empty ($title)" '
53 rm -rf .git &&
54 git init
55 '
56
57 test_expect_success "disable reflogs ($title)" '
58 git config core.logallrefupdates false &&
59 git reflog expire --expire=all --all
60 '
61
62 test_expect_success "setup basic history ($title)" '
63 commit base
64 '
65
66 test_expect_success "create and abandon some objects ($title)" '
67 git checkout -b experiment &&
68 commit abandon &&
69 maybe_repack &&
70 git checkout master &&
71 git branch -D experiment
72 '
73
74 test_expect_success "simulate time passing ($title)" '
75 find .git/objects -type f |
76 xargs test-chmtime -v -86400
77 '
78
79 test_expect_success "start writing new commit with old blob ($title)" '
80 tree=$(
81 GIT_INDEX_FILE=index.tmp &&
82 export GIT_INDEX_FILE &&
83 git read-tree HEAD &&
84 add unrelated &&
85 add abandon &&
86 git write-tree
87 )
88 '
89
90 test_expect_success "simultaneous gc ($title)" '
91 git gc --prune=12.hours.ago
92 '
93
94 test_expect_success "finish writing out commit ($title)" '
95 commit=$(echo foo | git commit-tree -p HEAD $tree) &&
96 git update-ref HEAD $commit
97 '
98
99 # "abandon" blob should have been rescued by reference from new tree
100 test_expect_success "repository passes fsck ($title)" '
101 git fsck
102 '
103
104 test_expect_success "abandon objects again ($title)" '
105 git reset --hard HEAD^ &&
106 find .git/objects -type f |
107 xargs test-chmtime -v -86400
108 '
109
110 test_expect_success "start writing new commit with same tree ($title)" '
111 tree=$(
112 GIT_INDEX_FILE=index.tmp &&
113 export GIT_INDEX_FILE &&
114 git read-tree HEAD &&
115 add abandon &&
116 add unrelated &&
117 git write-tree
118 )
119 '
120
121 test_expect_success "simultaneous gc ($title)" '
122 git gc --prune=12.hours.ago
123 '
124
125 # tree should have been refreshed by write-tree
126 test_expect_success "finish writing out commit ($title)" '
127 commit=$(echo foo | git commit-tree -p HEAD $tree) &&
128 git update-ref HEAD $commit
129 '
130 done
131
132 test_expect_success 'do not complain about existing broken links (commit)' '
133 cat >broken-commit <<-\EOF &&
134 tree 0000000000000000000000000000000000000001
135 parent 0000000000000000000000000000000000000002
136 author whatever <whatever@example.com> 1234 -0000
137 committer whatever <whatever@example.com> 1234 -0000
138
139 some message
140 EOF
141 commit=$(git hash-object -t commit -w broken-commit) &&
142 git gc 2>stderr &&
143 verbose git cat-file -e $commit &&
144 test_must_be_empty stderr
145 '
146
147 test_expect_success 'do not complain about existing broken links (tree)' '
148 cat >broken-tree <<-\EOF &&
149 100644 blob 0000000000000000000000000000000000000003 foo
150 EOF
151 tree=$(git mktree --missing <broken-tree) &&
152 git gc 2>stderr &&
153 git cat-file -e $tree &&
154 test_must_be_empty stderr
155 '
156
157 test_expect_success 'do not complain about existing broken links (tag)' '
158 cat >broken-tag <<-\EOF &&
159 object 0000000000000000000000000000000000000004
160 type commit
161 tag broken
162 tagger whatever <whatever@example.com> 1234 -0000
163
164 this is a broken tag
165 EOF
166 tag=$(git hash-object -t tag -w broken-tag) &&
167 git gc 2>stderr &&
168 git cat-file -e $tag &&
169 test_must_be_empty stderr
170 '
171
172 test_done