t/t0601-reffiles-pack-refs.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Amos Waterland
   4 # Copyright (c) 2006 Christian Couder
   5 #
   6
   7 test_description='git pack-refs should not change the branch semantic
   8
   9 This test runs git pack-refs and git show-ref and checks that the branch
  10 semantic is still the same.
  11 '
  12 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
  13 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
  14
  15 TEST_PASSES_SANITIZE_LEAK=true
  16 . ./test-lib.sh
  17
  18 if ! test_have_prereq REFFILES
  19 then
  20         skip_all='skipping reffiles specific tests'
  21         test_done
  22 fi
  23
  24 test_expect_success 'enable reflogs' '
  25         git config core.logallrefupdates true
  26 '
  27
  28 test_expect_success 'prepare a trivial repository' '
  29         echo Hello > A &&
  30         git update-index --add A &&
  31         git commit -m "Initial commit." &&
  32         HEAD=$(git rev-parse --verify HEAD)
  33 '
  34
  35 test_expect_success 'pack-refs --prune --all' '
  36         test_path_is_missing .git/packed-refs &&
  37         git pack-refs --no-prune --all &&
  38         test_path_is_file .git/packed-refs &&
  39         N=$(find .git/refs -type f | wc -l) &&
  40         test "$N" != 0 &&
  41
  42         git pack-refs --prune --all &&
  43         test_path_is_file .git/packed-refs &&
  44         N=$(find .git/refs -type f) &&
  45         test -z "$N"
  46 '
  47
  48 SHA1=
  49
  50 test_expect_success 'see if git show-ref works as expected' '
  51         git branch a &&
  52         SHA1=$(cat .git/refs/heads/a) &&
  53         echo "$SHA1 refs/heads/a" >expect &&
  54         git show-ref a >result &&
  55         test_cmp expect result
  56 '
  57
  58 test_expect_success 'see if a branch still exists when packed' '
  59         git branch b &&
  60         git pack-refs --all &&
  61         rm -f .git/refs/heads/b &&
  62         echo "$SHA1 refs/heads/b" >expect &&
  63         git show-ref b >result &&
  64         test_cmp expect result
  65 '
  66
  67 test_expect_success 'git branch c/d should barf if branch c exists' '
  68         git branch c &&
  69         git pack-refs --all &&
  70         rm -f .git/refs/heads/c &&
  71         test_must_fail git branch c/d
  72 '
  73
  74 test_expect_success 'see if a branch still exists after git pack-refs --prune' '
  75         git branch e &&
  76         git pack-refs --all --prune &&
  77         echo "$SHA1 refs/heads/e" >expect &&
  78         git show-ref e >result &&
  79         test_cmp expect result
  80 '
  81
  82 test_expect_success 'see if git pack-refs --prune remove ref files' '
  83         git branch f &&
  84         git pack-refs --all --prune &&
  85         ! test -f .git/refs/heads/f
  86 '
  87
  88 test_expect_success 'see if git pack-refs --prune removes empty dirs' '
  89         git branch r/s/t &&
  90         git pack-refs --all --prune &&
  91         ! test -e .git/refs/heads/r
  92 '
  93
  94 test_expect_success 'git branch g should work when git branch g/h has been deleted' '
  95         git branch g/h &&
  96         git pack-refs --all --prune &&
  97         git branch -d g/h &&
  98         git branch g &&
  99         git pack-refs --all &&
 100         git branch -d g
 101 '
 102
 103 test_expect_success 'git branch i/j/k should barf if branch i exists' '
 104         git branch i &&
 105         git pack-refs --all --prune &&
 106         test_must_fail git branch i/j/k
 107 '
 108
 109 test_expect_success 'test git branch k after branch k/l/m and k/lm have been deleted' '
 110         git branch k/l &&
 111         git branch k/lm &&
 112         git branch -d k/l &&
 113         git branch k/l/m &&
 114         git branch -d k/l/m &&
 115         git branch -d k/lm &&
 116         git branch k
 117 '
 118
 119 test_expect_success 'test git branch n after some branch deletion and pruning' '
 120         git branch n/o &&
 121         git branch n/op &&
 122         git branch -d n/o &&
 123         git branch n/o/p &&
 124         git branch -d n/op &&
 125         git pack-refs --all --prune &&
 126         git branch -d n/o/p &&
 127         git branch n
 128 '
 129
 130 test_expect_success 'test excluded refs are not packed' '
 131         git branch dont_pack1 &&
 132         git branch dont_pack2 &&
 133         git branch pack_this &&
 134         git pack-refs --all --exclude "refs/heads/dont_pack*" &&
 135         test -f .git/refs/heads/dont_pack1 &&
 136         test -f .git/refs/heads/dont_pack2 &&
 137         ! test -f .git/refs/heads/pack_this'
 138
 139 test_expect_success 'test --no-exclude refs clears excluded refs' '
 140         git branch dont_pack3 &&
 141         git branch dont_pack4 &&
 142         git pack-refs --all --exclude "refs/heads/dont_pack*" --no-exclude &&
 143         ! test -f .git/refs/heads/dont_pack3 &&
 144         ! test -f .git/refs/heads/dont_pack4'
 145
 146 test_expect_success 'test only included refs are packed' '
 147         git branch pack_this1 &&
 148         git branch pack_this2 &&
 149         git tag dont_pack5 &&
 150         git pack-refs --include "refs/heads/pack_this*" &&
 151         test -f .git/refs/tags/dont_pack5 &&
 152         ! test -f .git/refs/heads/pack_this1 &&
 153         ! test -f .git/refs/heads/pack_this2'
 154
 155 test_expect_success 'test --no-include refs clears included refs' '
 156         git branch pack1 &&
 157         git branch pack2 &&
 158         git pack-refs --include "refs/heads/pack*" --no-include &&
 159         test -f .git/refs/heads/pack1 &&
 160         test -f .git/refs/heads/pack2'
 161
 162 test_expect_success 'test --exclude takes precedence over --include' '
 163         git branch dont_pack5 &&
 164         git pack-refs --include "refs/heads/pack*" --exclude "refs/heads/pack*" &&
 165         test -f .git/refs/heads/dont_pack5'
 166
 167 test_expect_success '--auto packs and prunes refs as usual' '
 168         git branch auto &&
 169         test_path_is_file .git/refs/heads/auto &&
 170         git pack-refs --auto --all &&
 171         test_path_is_missing .git/refs/heads/auto
 172 '
 173
 174 test_expect_success 'see if up-to-date packed refs are preserved' '
 175         git branch q &&
 176         git pack-refs --all --prune &&
 177         git update-ref refs/heads/q refs/heads/q &&
 178         ! test -f .git/refs/heads/q
 179 '
 180
 181 test_expect_success 'pack, prune and repack' '
 182         git tag foo &&
 183         git pack-refs --all --prune &&
 184         git show-ref >all-of-them &&
 185         git pack-refs &&
 186         git show-ref >again &&
 187         test_cmp all-of-them again
 188 '
 189
 190 test_expect_success 'explicit pack-refs with dangling packed reference' '
 191         git commit --allow-empty -m "soon to be garbage-collected" &&
 192         git pack-refs --all &&
 193         git reset --hard HEAD^ &&
 194         git reflog expire --expire=all --all &&
 195         git prune --expire=all &&
 196         git pack-refs --all 2>result &&
 197         test_must_be_empty result
 198 '
 199
 200 test_expect_success 'delete ref with dangling packed version' '
 201         git checkout -b lamb &&
 202         git commit --allow-empty -m "future garbage" &&
 203         git pack-refs --all &&
 204         git reset --hard HEAD^ &&
 205         git checkout main &&
 206         git reflog expire --expire=all --all &&
 207         git prune --expire=all &&
 208         git branch -d lamb 2>result &&
 209         test_must_be_empty result
 210 '
 211
 212 test_expect_success 'delete ref while another dangling packed ref' '
 213         git branch lamb &&
 214         git commit --allow-empty -m "future garbage" &&
 215         git pack-refs --all &&
 216         git reset --hard HEAD^ &&
 217         git reflog expire --expire=all --all &&
 218         git prune --expire=all &&
 219         git branch -d lamb 2>result &&
 220         test_must_be_empty result
 221 '
 222
 223 test_expect_success 'pack ref directly below refs/' '
 224         git update-ref refs/top HEAD &&
 225         git pack-refs --all --prune &&
 226         grep refs/top .git/packed-refs &&
 227         test_path_is_missing .git/refs/top
 228 '
 229
 230 test_expect_success 'do not pack ref in refs/bisect' '
 231         git update-ref refs/bisect/local HEAD &&
 232         git pack-refs --all --prune &&
 233         ! grep refs/bisect/local .git/packed-refs >/dev/null &&
 234         test_path_is_file .git/refs/bisect/local
 235 '
 236
 237 test_expect_success 'disable reflogs' '
 238         git config core.logallrefupdates false &&
 239         rm -rf .git/logs
 240 '
 241
 242 test_expect_success 'create packed foo/bar/baz branch' '
 243         git branch foo/bar/baz &&
 244         git pack-refs --all --prune &&
 245         test_path_is_missing .git/refs/heads/foo/bar/baz &&
 246         test_must_fail git reflog exists refs/heads/foo/bar/baz
 247 '
 248
 249 test_expect_success 'notice d/f conflict with existing directory' '
 250         test_must_fail git branch foo &&
 251         test_must_fail git branch foo/bar
 252 '
 253
 254 test_expect_success 'existing directory reports concrete ref' '
 255         test_must_fail git branch foo 2>stderr &&
 256         test_grep refs/heads/foo/bar/baz stderr
 257 '
 258
 259 test_expect_success 'notice d/f conflict with existing ref' '
 260         test_must_fail git branch foo/bar/baz/extra &&
 261         test_must_fail git branch foo/bar/baz/lots/of/extra/components
 262 '
 263
 264 test_expect_success 'reject packed-refs with unterminated line' '
 265         cp .git/packed-refs .git/packed-refs.bak &&
 266         test_when_finished "mv .git/packed-refs.bak .git/packed-refs" &&
 267         printf "%s" "$HEAD refs/zzzzz" >>.git/packed-refs &&
 268         echo "fatal: unterminated line in .git/packed-refs: $HEAD refs/zzzzz" >expected_err &&
 269         test_must_fail git for-each-ref >out 2>err &&
 270         test_cmp expected_err err
 271 '
 272
 273 test_expect_success 'reject packed-refs containing junk' '
 274         cp .git/packed-refs .git/packed-refs.bak &&
 275         test_when_finished "mv .git/packed-refs.bak .git/packed-refs" &&
 276         printf "%s\n" "bogus content" >>.git/packed-refs &&
 277         echo "fatal: unexpected line in .git/packed-refs: bogus content" >expected_err &&
 278         test_must_fail git for-each-ref >out 2>err &&
 279         test_cmp expected_err err
 280 '
 281
 282 test_expect_success 'reject packed-refs with a short SHA-1' '
 283         cp .git/packed-refs .git/packed-refs.bak &&
 284         test_when_finished "mv .git/packed-refs.bak .git/packed-refs" &&
 285         printf "%.7s %s\n" $HEAD refs/zzzzz >>.git/packed-refs &&
 286         printf "fatal: unexpected line in .git/packed-refs: %.7s %s\n" $HEAD refs/zzzzz >expected_err &&
 287         test_must_fail git for-each-ref >out 2>err &&
 288         test_cmp expected_err err
 289 '
 290
 291 test_expect_success 'timeout if packed-refs.lock exists' '
 292         LOCK=.git/packed-refs.lock &&
 293         >"$LOCK" &&
 294         test_when_finished "rm -f $LOCK" &&
 295         test_must_fail git pack-refs --all --prune
 296 '
 297
 298 test_expect_success 'retry acquiring packed-refs.lock' '
 299         LOCK=.git/packed-refs.lock &&
 300         >"$LOCK" &&
 301         test_when_finished "wait && rm -f $LOCK" &&
 302         {
 303                 ( sleep 1 && rm -f $LOCK ) &
 304         } &&
 305         git -c core.packedrefstimeout=3000 pack-refs --all --prune
 306 '
 307
 308 test_expect_success SYMLINKS 'pack symlinked packed-refs' '
 309         # First make sure that symlinking works when reading:
 310         git update-ref refs/heads/lossy refs/heads/main &&
 311         git for-each-ref >all-refs-before &&
 312         mv .git/packed-refs .git/my-deviant-packed-refs &&
 313         ln -s my-deviant-packed-refs .git/packed-refs &&
 314         git for-each-ref >all-refs-linked &&
 315         test_cmp all-refs-before all-refs-linked &&
 316         git pack-refs --all --prune &&
 317         git for-each-ref >all-refs-packed &&
 318         test_cmp all-refs-before all-refs-packed &&
 319         test -h .git/packed-refs &&
 320         test "$(test_readlink .git/packed-refs)" = "my-deviant-packed-refs"
 321 '
 322
 323 # The 'packed-refs' file is stored directly in .git/. This means it is global
 324 # to the repository, and can only contain refs that are shared across all
 325 # worktrees.
 326 test_expect_success 'refs/worktree must not be packed' '
 327         test_commit initial &&
 328         test_commit wt1 &&
 329         test_commit wt2 &&
 330         git worktree add wt1 wt1 &&
 331         git worktree add wt2 wt2 &&
 332         git checkout initial &&
 333         git update-ref refs/worktree/foo HEAD &&
 334         git -C wt1 update-ref refs/worktree/foo HEAD &&
 335         git -C wt2 update-ref refs/worktree/foo HEAD &&
 336         git pack-refs --all &&
 337         test_path_is_missing .git/refs/tags/wt1 &&
 338         test_path_is_file .git/refs/worktree/foo &&
 339         test_path_is_file .git/worktrees/wt1/refs/worktree/foo &&
 340         test_path_is_file .git/worktrees/wt2/refs/worktree/foo
 341 '
 342
 343 # we do not want to count on running pack-refs to
 344 # actually pack it, as it is perfectly reasonable to
 345 # skip processing a broken ref
 346 test_expect_success 'create packed-refs file with broken ref' '
 347         test_tick && git commit --allow-empty -m one &&
 348         recoverable=$(git rev-parse HEAD) &&
 349         test_tick && git commit --allow-empty -m two &&
 350         missing=$(git rev-parse HEAD) &&
 351         rm -f .git/refs/heads/main &&
 352         cat >.git/packed-refs <<-EOF &&
 353         $missing refs/heads/main
 354         $recoverable refs/heads/other
 355         EOF
 356         echo $missing >expect &&
 357         git rev-parse refs/heads/main >actual &&
 358         test_cmp expect actual
 359 '
 360
 361 test_expect_success 'pack-refs does not silently delete broken packed ref' '
 362         git pack-refs --all --prune &&
 363         git rev-parse refs/heads/main >actual &&
 364         test_cmp expect actual
 365 '
 366
 367 test_expect_success 'pack-refs does not drop broken refs during deletion' '
 368         git update-ref -d refs/heads/other &&
 369         git rev-parse refs/heads/main >actual &&
 370         test_cmp expect actual
 371 '
 372
 373 test_expect_success 'maintenance --auto unconditionally packs loose refs' '
 374         git update-ref refs/heads/something HEAD &&
 375         test_path_is_file .git/refs/heads/something &&
 376         git rev-parse refs/heads/something >expect &&
 377         git maintenance run --task=pack-refs --auto &&
 378         test_path_is_missing .git/refs/heads/something &&
 379         git rev-parse refs/heads/something >actual &&
 380         test_cmp expect actual
 381 '
 382
 383 test_done