]> git.ipfire.org Git - thirdparty/git.git/blob - t/t6501-freshen-objects.sh
hashmap: use *_entry APIs for iteration
[thirdparty/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 test-tool chmtime --get -86400 $(find .git/objects -type f)
76 '
77
78 test_expect_success "start writing new commit with old blob ($title)" '
79 tree=$(
80 GIT_INDEX_FILE=index.tmp &&
81 export GIT_INDEX_FILE &&
82 git read-tree HEAD &&
83 add unrelated &&
84 add abandon &&
85 git write-tree
86 )
87 '
88
89 test_expect_success "simultaneous gc ($title)" '
90 git gc --prune=12.hours.ago
91 '
92
93 test_expect_success "finish writing out commit ($title)" '
94 commit=$(echo foo | git commit-tree -p HEAD $tree) &&
95 git update-ref HEAD $commit
96 '
97
98 # "abandon" blob should have been rescued by reference from new tree
99 test_expect_success "repository passes fsck ($title)" '
100 git fsck
101 '
102
103 test_expect_success "abandon objects again ($title)" '
104 git reset --hard HEAD^ &&
105 test-tool chmtime --get -86400 $(find .git/objects -type f)
106 '
107
108 test_expect_success "start writing new commit with same tree ($title)" '
109 tree=$(
110 GIT_INDEX_FILE=index.tmp &&
111 export GIT_INDEX_FILE &&
112 git read-tree HEAD &&
113 add abandon &&
114 add unrelated &&
115 git write-tree
116 )
117 '
118
119 test_expect_success "simultaneous gc ($title)" '
120 git gc --prune=12.hours.ago
121 '
122
123 # tree should have been refreshed by write-tree
124 test_expect_success "finish writing out commit ($title)" '
125 commit=$(echo foo | git commit-tree -p HEAD $tree) &&
126 git update-ref HEAD $commit
127 '
128 done
129
130 test_expect_success 'do not complain about existing broken links (commit)' '
131 cat >broken-commit <<-\EOF &&
132 tree 0000000000000000000000000000000000000001
133 parent 0000000000000000000000000000000000000002
134 author whatever <whatever@example.com> 1234 -0000
135 committer whatever <whatever@example.com> 1234 -0000
136
137 some message
138 EOF
139 commit=$(git hash-object -t commit -w broken-commit) &&
140 git gc 2>stderr &&
141 verbose git cat-file -e $commit &&
142 test_must_be_empty stderr
143 '
144
145 test_expect_success 'do not complain about existing broken links (tree)' '
146 cat >broken-tree <<-\EOF &&
147 100644 blob 0000000000000000000000000000000000000003 foo
148 EOF
149 tree=$(git mktree --missing <broken-tree) &&
150 git gc 2>stderr &&
151 git cat-file -e $tree &&
152 test_must_be_empty stderr
153 '
154
155 test_expect_success 'do not complain about existing broken links (tag)' '
156 cat >broken-tag <<-\EOF &&
157 object 0000000000000000000000000000000000000004
158 type commit
159 tag broken
160 tagger whatever <whatever@example.com> 1234 -0000
161
162 this is a broken tag
163 EOF
164 tag=$(git hash-object -t tag -w broken-tag) &&
165 git gc 2>stderr &&
166 git cat-file -e $tag &&
167 test_must_be_empty stderr
168 '
169
170 test_done