| 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 | GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main |
| 29 | export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME |
| 30 | |
| 31 | . ./test-lib.sh |
| 32 | |
| 33 | # We care about reachability, so we do not want to use |
| 34 | # the normal test_commit, which creates extra tags. |
| 35 | add () { |
| 36 | echo "$1" >"$1" && |
| 37 | git add "$1" |
| 38 | } |
| 39 | commit () { |
| 40 | test_tick && |
| 41 | add "$1" && |
| 42 | git commit -m "$1" |
| 43 | } |
| 44 | |
| 45 | maybe_repack () { |
| 46 | case "$title" in |
| 47 | loose) |
| 48 | : skip repack |
| 49 | ;; |
| 50 | repack) |
| 51 | git repack -ad |
| 52 | ;; |
| 53 | bitmap) |
| 54 | git repack -adb |
| 55 | ;; |
| 56 | *) |
| 57 | echo >&2 "unknown test type in maybe_repack" |
| 58 | return 1 |
| 59 | ;; |
| 60 | esac |
| 61 | } |
| 62 | |
| 63 | for title in loose repack bitmap |
| 64 | do |
| 65 | test_expect_success "make repo completely empty ($title)" ' |
| 66 | rm -rf .git && |
| 67 | git init |
| 68 | ' |
| 69 | |
| 70 | test_expect_success "disable reflogs ($title)" ' |
| 71 | git config core.logallrefupdates false && |
| 72 | git reflog expire --expire=all --all |
| 73 | ' |
| 74 | |
| 75 | test_expect_success "setup basic history ($title)" ' |
| 76 | commit base |
| 77 | ' |
| 78 | |
| 79 | test_expect_success "create and abandon some objects ($title)" ' |
| 80 | git checkout -b experiment && |
| 81 | commit abandon && |
| 82 | maybe_repack && |
| 83 | git checkout main && |
| 84 | git branch -D experiment |
| 85 | ' |
| 86 | |
| 87 | test_expect_success "simulate time passing ($title)" ' |
| 88 | test-tool chmtime --get -86400 $(find .git/objects -type f) |
| 89 | ' |
| 90 | |
| 91 | test_expect_success "start writing new commit with old blob ($title)" ' |
| 92 | tree=$( |
| 93 | GIT_INDEX_FILE=index.tmp && |
| 94 | export GIT_INDEX_FILE && |
| 95 | git read-tree HEAD && |
| 96 | add unrelated && |
| 97 | add abandon && |
| 98 | git write-tree |
| 99 | ) |
| 100 | ' |
| 101 | |
| 102 | test_expect_success "simultaneous gc ($title)" ' |
| 103 | git gc --no-cruft --prune=12.hours.ago |
| 104 | ' |
| 105 | |
| 106 | test_expect_success "finish writing out commit ($title)" ' |
| 107 | commit=$(echo foo | git commit-tree -p HEAD $tree) && |
| 108 | git update-ref HEAD $commit |
| 109 | ' |
| 110 | |
| 111 | # "abandon" blob should have been rescued by reference from new tree |
| 112 | test_expect_success "repository passes fsck ($title)" ' |
| 113 | git fsck |
| 114 | ' |
| 115 | |
| 116 | test_expect_success "abandon objects again ($title)" ' |
| 117 | git reset --hard HEAD^ && |
| 118 | test-tool chmtime --get -86400 $(find .git/objects -type f) |
| 119 | ' |
| 120 | |
| 121 | test_expect_success "start writing new commit with same tree ($title)" ' |
| 122 | tree=$( |
| 123 | GIT_INDEX_FILE=index.tmp && |
| 124 | export GIT_INDEX_FILE && |
| 125 | git read-tree HEAD && |
| 126 | add abandon && |
| 127 | add unrelated && |
| 128 | git write-tree |
| 129 | ) |
| 130 | ' |
| 131 | |
| 132 | test_expect_success "simultaneous gc ($title)" ' |
| 133 | git gc --no-cruft --prune=12.hours.ago |
| 134 | ' |
| 135 | |
| 136 | # tree should have been refreshed by write-tree |
| 137 | test_expect_success "finish writing out commit ($title)" ' |
| 138 | commit=$(echo foo | git commit-tree -p HEAD $tree) && |
| 139 | git update-ref HEAD $commit |
| 140 | ' |
| 141 | done |
| 142 | |
| 143 | test_expect_success 'do not complain about existing broken links (commit)' ' |
| 144 | cat >broken-commit <<-EOF && |
| 145 | tree $(test_oid 001) |
| 146 | parent $(test_oid 002) |
| 147 | author whatever <whatever@example.com> 1234 -0000 |
| 148 | committer whatever <whatever@example.com> 1234 -0000 |
| 149 | |
| 150 | some message |
| 151 | EOF |
| 152 | commit=$(git hash-object -t commit -w broken-commit) && |
| 153 | git gc --no-cruft -q 2>stderr && |
| 154 | git cat-file -e $commit && |
| 155 | test_must_be_empty stderr |
| 156 | ' |
| 157 | |
| 158 | test_expect_success 'do not complain about existing broken links (tree)' ' |
| 159 | cat >broken-tree <<-EOF && |
| 160 | 100644 blob $(test_oid 003) foo |
| 161 | EOF |
| 162 | tree=$(git mktree --missing <broken-tree) && |
| 163 | git gc --no-cruft -q 2>stderr && |
| 164 | git cat-file -e $tree && |
| 165 | test_must_be_empty stderr |
| 166 | ' |
| 167 | |
| 168 | test_expect_success 'do not complain about existing broken links (tag)' ' |
| 169 | cat >broken-tag <<-EOF && |
| 170 | object $(test_oid 004) |
| 171 | type commit |
| 172 | tag broken |
| 173 | tagger whatever <whatever@example.com> 1234 -0000 |
| 174 | |
| 175 | this is a broken tag |
| 176 | EOF |
| 177 | tag=$(git hash-object -t tag -w broken-tag) && |
| 178 | git gc --no-cruft -q 2>stderr && |
| 179 | git cat-file -e $tag && |
| 180 | test_must_be_empty stderr |
| 181 | ' |
| 182 | |
| 183 | test_done |