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