(command.CommandList
  children: [
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (lhs_expr.LhsName name:test_description)
          op: Equal
          rhs: {(SQ <'check pruning of dependent objects'>)}
        )
      ]
    )
    (C {(.)} {(./test-lib.sh)})
    (command.FuncDef
      name: add
      body: 
        (command.BraceGroup
          children: [
            (command.AndOr
              ops: [Op_DAmp]
              children: [
                (command.SimpleCommand
                  words: [{(echo)} {(DQ ($ VSub_Number '$1'))}]
                  redirects: [
                    (redir.Redir
                      op: <Redir_Great '>'>
                      fd: 16777215
                      arg_word: {(DQ ($ VSub_Number '$1'))}
                    )
                  ]
                )
                (C {(git)} {(add)} {(DQ ($ VSub_Number '$1'))})
              ]
            )
          ]
        )
    )
    (command.FuncDef
      name: commit
      body: 
        (command.BraceGroup
          children: [
            (command.AndOr
              ops: [Op_DAmp Op_DAmp]
              children: [
                (C {(test_tick)})
                (C {(add)} {(DQ ($ VSub_Number '$1'))})
                (C {(git)} {(commit)} {(-m)} {(DQ ($ VSub_Number '$1'))})
              ]
            )
          ]
        )
    )
    (command.FuncDef
      name: maybe_repack
      body: 
        (command.BraceGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: (C {(test)} {(-n)} {(DQ ($ VSub_DollarName '$repack'))})
                      terminator: <Op_Semi ';'>
                    )
                  ]
                  action: [(C {(git)} {(repack)} {(-ad)})]
                )
              ]
            )
          ]
        )
    )
    (command.ForEach
      iter_name: repack
      iter_words: [{(SQ )} {(true)}]
      do_arg_iter: F
      body: 
        (command.DoGroup
          children: [
            (command.Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (lhs_expr.LhsName name:title)
                  op: Equal
                  rhs: 
                    {
                      (word_part.BracedVarSub
                        token: <VSub_Name repack>
                        suffix_op: (suffix_op.StringUnary op_id:VTest_ColonPlus arg_word:{(repack)})
                      )
                    }
                )
              ]
            )
            (command.Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (lhs_expr.LhsName name:title)
                  op: Equal
                  rhs: 
                    {
                      (word_part.BracedVarSub
                        token: <VSub_Name title>
                        suffix_op: (suffix_op.StringUnary op_id:VTest_ColonHyphen arg_word:{(loose)})
                      )
                    }
                )
              ]
            )
            (C {(test_expect_success)} 
              {(DQ ('make repo completely empty (') ($ VSub_DollarName '$title') (')'))} {(SQ <'\n'> <'\t\trm -rf .git &&\n'> <'\t\tgit init\n'> <'\t'>)}
            )
            (C {(test_expect_success)} {(DQ ('disable reflogs (') ($ VSub_DollarName '$title') (')'))} 
              {
                (SQ <'\n'> <'\t\tgit config core.logallrefupdates false &&\n'> 
                  <'\t\tgit reflog expire --expire=all --all\n'> <'\t'>
                )
              }
            )
            (C {(test_expect_success)} 
              {(DQ ('setup basic history (') ($ VSub_DollarName '$title') (')'))} {(SQ <'\n'> <'\t\tcommit base\n'> <'\t'>)}
            )
            (C {(test_expect_success)} 
              {(DQ ('create and abandon some objects (') ($ VSub_DollarName '$title') (')'))} 
              {
                (SQ <'\n'> <'\t\tgit checkout -b experiment &&\n'> <'\t\tcommit abandon &&\n'> 
                  <'\t\tmaybe_repack &&\n'> <'\t\tgit checkout master &&\n'> <'\t\tgit branch -D experiment\n'> <'\t'>
                )
              }
            )
            (C {(test_expect_success)} 
              {(DQ ('simulate time passing (') ($ VSub_DollarName '$title') (')'))} {(SQ <'\n'> <'\t\tfind .git/objects -type f |\n'> <'\t\txargs test-chmtime -v -86400\n'> <'\t'>)}
            )
            (C {(test_expect_success)} 
              {(DQ ('start writing new commit with old blob (') ($ VSub_DollarName '$title') (')'))} 
              {
                (SQ <'\n'> <'\t\ttree=$(\n'> <'\t\t\tGIT_INDEX_FILE=index.tmp &&\n'> 
                  <'\t\t\texport GIT_INDEX_FILE &&\n'> <'\t\t\tgit read-tree HEAD &&\n'> <'\t\t\tadd unrelated &&\n'> <'\t\t\tadd abandon &&\n'> 
                  <'\t\t\tgit write-tree\n'> <'\t\t)\n'> <'\t'>
                )
              }
            )
            (C {(test_expect_success)} {(DQ ('simultaneous gc (') ($ VSub_DollarName '$title') (')'))} 
              {(SQ <'\n'> <'\t\tgit gc --prune=12.hours.ago\n'> <'\t'>)}
            )
            (C {(test_expect_success)} 
              {(DQ ('finish writing out commit (') ($ VSub_DollarName '$title') (')'))} 
              {
                (SQ <'\n'> <'\t\tcommit=$(echo foo | git commit-tree -p HEAD $tree) &&\n'> 
                  <'\t\tgit update-ref HEAD $commit\n'> <'\t'>
                )
              }
            )
            (C {(test_expect_success)} 
              {(DQ ('repository passes fsck (') ($ VSub_DollarName '$title') (')'))} {(SQ <'\n'> <'\t\tgit fsck\n'> <'\t'>)}
            )
            (C {(test_expect_success)} 
              {(DQ ('abandon objects again (') ($ VSub_DollarName '$title') (')'))} 
              {
                (SQ <'\n'> <'\t\tgit reset --hard HEAD^ &&\n'> <'\t\tfind .git/objects -type f |\n'> 
                  <'\t\txargs test-chmtime -v -86400\n'> <'\t'>
                )
              }
            )
            (C {(test_expect_success)} 
              {(DQ ('start writing new commit with same tree (') ($ VSub_DollarName '$title') (')'))} 
              {
                (SQ <'\n'> <'\t\ttree=$(\n'> <'\t\t\tGIT_INDEX_FILE=index.tmp &&\n'> 
                  <'\t\t\texport GIT_INDEX_FILE &&\n'> <'\t\t\tgit read-tree HEAD &&\n'> <'\t\t\tadd abandon &&\n'> <'\t\t\tadd unrelated &&\n'> 
                  <'\t\t\tgit write-tree\n'> <'\t\t)\n'> <'\t'>
                )
              }
            )
            (C {(test_expect_success)} {(DQ ('simultaneous gc (') ($ VSub_DollarName '$title') (')'))} 
              {(SQ <'\n'> <'\t\tgit gc --prune=12.hours.ago\n'> <'\t'>)}
            )
            (C {(test_expect_success)} 
              {(DQ ('finish writing out commit (') ($ VSub_DollarName '$title') (')'))} 
              {
                (SQ <'\n'> <'\t\tcommit=$(echo foo | git commit-tree -p HEAD $tree) &&\n'> 
                  <'\t\tgit update-ref HEAD $commit\n'> <'\t'>
                )
              }
            )
          ]
        )
    )
    (C {(test_expect_success)} {(SQ <'do not complain about existing broken links'>)} 
      {
        (SQ <'\n'> <'\tcat >broken-commit <<-\\EOF &&\n'> 
          <'\ttree 0000000000000000000000000000000000000001\n'> <'\tparent 0000000000000000000000000000000000000002\n'> 
          <'\tauthor whatever <whatever@example.com> 1234 -0000\n'> <'\tcommitter whatever <whatever@example.com> 1234 -0000\n'> <'\n'> <'\tsome message\n'> <'\tEOF\n'> 
          <'\tcommit=$(git hash-object -t commit -w broken-commit) &&\n'> <'\tgit gc 2>stderr &&\n'> <'\tverbose git cat-file -e $commit &&\n'> <'\ttest_must_be_empty stderr\n'>
        )
      }
    )
    (C {(test_done)})
  ]
)