t/t6500-gc.sh

   1 #!/bin/sh
   2
   3 test_description='basic git gc tests
   4 '
   5
   6 . ./test-lib.sh
   7 . "$TEST_DIRECTORY"/lib-terminal.sh
   8
   9 test_expect_success 'setup' '
  10         # do not let the amount of physical memory affects gc
  11         # behavior, make sure we always pack everything to one pack by
  12         # default
  13         git config gc.bigPackThreshold 2g &&
  14
  15         # These are simply values which, when hashed as a blob with a newline,
  16         # produce a hash where the first byte is 0x17 in their respective
  17         # algorithms.
  18         test_oid_cache <<-EOF
  19         obj1 sha1:263
  20         obj1 sha256:34
  21
  22         obj2 sha1:410
  23         obj2 sha256:174
  24
  25         obj3 sha1:523
  26         obj3 sha256:313
  27
  28         obj4 sha1:790
  29         obj4 sha256:481
  30         EOF
  31 '
  32
  33 test_expect_success 'gc empty repository' '
  34         git gc
  35 '
  36
  37 test_expect_success 'gc does not leave behind pid file' '
  38         git gc &&
  39         test_path_is_missing .git/gc.pid
  40 '
  41
  42 test_expect_success 'gc --gobbledegook' '
  43         test_expect_code 129 git gc --nonsense 2>err &&
  44         test_i18ngrep "[Uu]sage: git gc" err
  45 '
  46
  47 test_expect_success 'gc -h with invalid configuration' '
  48         mkdir broken &&
  49         (
  50                 cd broken &&
  51                 git init &&
  52                 echo "[gc] pruneexpire = CORRUPT" >>.git/config &&
  53                 test_expect_code 129 git gc -h >usage 2>&1
  54         ) &&
  55         test_i18ngrep "[Uu]sage" broken/usage
  56 '
  57
  58 test_expect_success 'gc is not aborted due to a stale symref' '
  59         git init remote &&
  60         (
  61                 cd remote &&
  62                 test_commit initial &&
  63                 git clone . ../client &&
  64                 git branch -m develop &&
  65                 cd ../client &&
  66                 git fetch --prune &&
  67                 git gc
  68         )
  69 '
  70
  71 test_expect_success 'gc --keep-largest-pack' '
  72         test_create_repo keep-pack &&
  73         (
  74                 cd keep-pack &&
  75                 test_commit one &&
  76                 test_commit two &&
  77                 test_commit three &&
  78                 git gc &&
  79                 ( cd .git/objects/pack && ls *.pack ) >pack-list &&
  80                 test_line_count = 1 pack-list &&
  81                 cp pack-list base-pack-list &&
  82                 test_commit four &&
  83                 git repack -d &&
  84                 test_commit five &&
  85                 git repack -d &&
  86                 ( cd .git/objects/pack && ls *.pack ) >pack-list &&
  87                 test_line_count = 3 pack-list &&
  88                 git gc --keep-largest-pack &&
  89                 ( cd .git/objects/pack && ls *.pack ) >pack-list &&
  90                 test_line_count = 2 pack-list &&
  91                 awk "/^P /{print \$2}" <.git/objects/info/packs >pack-info &&
  92                 test_line_count = 2 pack-info &&
  93                 test_path_is_file .git/objects/pack/$(cat base-pack-list) &&
  94                 git fsck
  95         )
  96 '
  97
  98 test_expect_success 'pre-auto-gc hook can stop auto gc' '
  99         cat >err.expect <<-\EOF &&
 100         no gc for you
 101         EOF
 102
 103         git init pre-auto-gc-hook &&
 104         (
 105                 cd pre-auto-gc-hook &&
 106                 write_script ".git/hooks/pre-auto-gc" <<-\EOF &&
 107                 echo >&2 no gc for you &&
 108                 exit 1
 109                 EOF
 110
 111                 git config gc.auto 3 &&
 112                 git config gc.autoDetach false &&
 113
 114                 # We need to create two object whose sha1s start with 17
 115                 # since this is what git gc counts.  As it happens, these
 116                 # two blobs will do so.
 117                 test_commit "$(test_oid obj1)" &&
 118                 test_commit "$(test_oid obj2)" &&
 119
 120                 git gc --auto >../out.actual 2>../err.actual
 121         ) &&
 122         test_must_be_empty out.actual &&
 123         test_cmp err.expect err.actual &&
 124
 125         cat >err.expect <<-\EOF &&
 126         will gc for you
 127         Auto packing the repository for optimum performance.
 128         See "git help gc" for manual housekeeping.
 129         EOF
 130
 131         (
 132                 cd pre-auto-gc-hook &&
 133                 write_script ".git/hooks/pre-auto-gc" <<-\EOF &&
 134                 echo >&2 will gc for you &&
 135                 exit 0
 136                 EOF
 137                 git gc --auto >../out.actual 2>../err.actual
 138         ) &&
 139
 140         test_must_be_empty out.actual &&
 141         test_cmp err.expect err.actual
 142 '
 143
 144 test_expect_success 'auto gc with too many loose objects does not attempt to create bitmaps' '
 145         test_config gc.auto 3 &&
 146         test_config gc.autodetach false &&
 147         test_config pack.writebitmaps true &&
 148         # We need to create two object whose sha1s start with 17
 149         # since this is what git gc counts.  As it happens, these
 150         # two blobs will do so.
 151         test_commit "$(test_oid obj1)" &&
 152         test_commit "$(test_oid obj2)" &&
 153         # Our first gc will create a pack; our second will create a second pack
 154         git gc --auto &&
 155         ls .git/objects/pack/pack-*.pack | sort >existing_packs &&
 156         test_commit "$(test_oid obj3)" &&
 157         test_commit "$(test_oid obj4)" &&
 158
 159         git gc --auto 2>err &&
 160         test_i18ngrep ! "^warning:" err &&
 161         ls .git/objects/pack/pack-*.pack | sort >post_packs &&
 162         comm -1 -3 existing_packs post_packs >new &&
 163         comm -2 -3 existing_packs post_packs >del &&
 164         test_line_count = 0 del && # No packs are deleted
 165         test_line_count = 1 new # There is one new pack
 166 '
 167
 168 test_expect_success 'gc --no-quiet' '
 169         GIT_PROGRESS_DELAY=0 git -c gc.writeCommitGraph=true gc --no-quiet >stdout 2>stderr &&
 170         test_must_be_empty stdout &&
 171         test_i18ngrep "Computing commit graph generation numbers" stderr
 172 '
 173
 174 test_expect_success TTY 'with TTY: gc --no-quiet' '
 175         test_terminal env GIT_PROGRESS_DELAY=0 \
 176                 git -c gc.writeCommitGraph=true gc --no-quiet >stdout 2>stderr &&
 177         test_must_be_empty stdout &&
 178         test_i18ngrep "Enumerating objects" stderr &&
 179         test_i18ngrep "Computing commit graph generation numbers" stderr
 180 '
 181
 182 test_expect_success 'gc --quiet' '
 183         git -c gc.writeCommitGraph=true gc --quiet >stdout 2>stderr &&
 184         test_must_be_empty stdout &&
 185         test_must_be_empty stderr
 186 '
 187
 188 test_expect_success 'gc.reflogExpire{Unreachable,}=never skips "expire" via "gc"' '
 189         test_config gc.reflogExpire never &&
 190         test_config gc.reflogExpireUnreachable never &&
 191
 192         GIT_TRACE=$(pwd)/trace.out git gc &&
 193
 194         # Check that git-pack-refs is run as a sanity check (done via
 195         # gc_before_repack()) but that git-expire is not.
 196         grep -E "^trace: (built-in|exec|run_command): git pack-refs --" trace.out &&
 197         ! grep -E "^trace: (built-in|exec|run_command): git reflog expire --" trace.out
 198 '
 199
 200 test_expect_success 'one of gc.reflogExpire{Unreachable,}=never does not skip "expire" via "gc"' '
 201         >trace.out &&
 202         test_config gc.reflogExpire never &&
 203         GIT_TRACE=$(pwd)/trace.out git gc &&
 204         grep -E "^trace: (built-in|exec|run_command): git reflog expire --" trace.out
 205 '
 206
 207 run_and_wait_for_auto_gc () {
 208         # We read stdout from gc for the side effect of waiting until the
 209         # background gc process exits, closing its fd 9.  Furthermore, the
 210         # variable assignment from a command substitution preserves the
 211         # exit status of the main gc process.
 212         # Note: this fd trickery doesn't work on Windows, but there is no
 213         # need to, because on Win the auto gc always runs in the foreground.
 214         doesnt_matter=$(git gc --auto 9>&1)
 215 }
 216
 217 test_expect_success 'background auto gc does not run if gc.log is present and recent but does if it is old' '
 218         test_commit foo &&
 219         test_commit bar &&
 220         git repack &&
 221         test_config gc.autopacklimit 1 &&
 222         test_config gc.autodetach true &&
 223         echo fleem >.git/gc.log &&
 224         git gc --auto 2>err &&
 225         test_i18ngrep "^warning:" err &&
 226         test_config gc.logexpiry 5.days &&
 227         test-tool chmtime =-345600 .git/gc.log &&
 228         git gc --auto &&
 229         test_config gc.logexpiry 2.days &&
 230         run_and_wait_for_auto_gc &&
 231         ls .git/objects/pack/pack-*.pack >packs &&
 232         test_line_count = 1 packs
 233 '
 234
 235 test_expect_success 'background auto gc respects lock for all operations' '
 236         # make sure we run a background auto-gc
 237         test_commit make-pack &&
 238         git repack &&
 239         test_config gc.autopacklimit 1 &&
 240         test_config gc.autodetach true &&
 241
 242         # create a ref whose loose presence we can use to detect a pack-refs run
 243         git update-ref refs/heads/should-be-loose HEAD &&
 244         (ls -1 .git/refs/heads .git/reftable >expect || true) &&
 245
 246         # now fake a concurrent gc that holds the lock; we can use our
 247         # shell pid so that it looks valid.
 248         hostname=$(hostname || echo unknown) &&
 249         shell_pid=$$ &&
 250         if test_have_prereq MINGW && test -f /proc/$shell_pid/winpid
 251         then
 252                 # In Git for Windows, Bash (actually, the MSYS2 runtime) has a
 253                 # different idea of PIDs than git.exe (actually Windows). Use
 254                 # the Windows PID in this case.
 255                 shell_pid=$(cat /proc/$shell_pid/winpid)
 256         fi &&
 257         printf "%d %s" "$shell_pid" "$hostname" >.git/gc.pid &&
 258
 259         # our gc should exit zero without doing anything
 260         run_and_wait_for_auto_gc &&
 261         (ls -1 .git/refs/heads .git/reftable >actual || true) &&
 262         test_cmp expect actual
 263 '
 264
 265 # DO NOT leave a detached auto gc process running near the end of the
 266 # test script: it can run long enough in the background to racily
 267 # interfere with the cleanup in 'test_done'.
 268
 269 test_done