Andrew's git - gitweb.git/blob - t/t6501-freshen-objects.sh

   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
  27test_description='check pruning of dependent objects'
  28. ./test-lib.sh
  29
  30# We care about reachability, so we do not want to use
  31# the normal test_commit, which creates extra tags.
  32add () {
  33        echo "$1" >"$1" &&
  34        git add "$1"
  35}
  36commit () {
  37        test_tick &&
  38        add "$1" &&
  39        git commit -m "$1"
  40}
  41
  42maybe_repack () {
  43        if test -n "$repack"; then
  44                git repack -ad
  45        fi
  46}
  47
  48for repack in '' true; do
  49        title=${repack:+repack}
  50        title=${title:-loose}
  51
  52        test_expect_success "make repo completely empty ($title)" '
  53                rm -rf .git &&
  54                git init
  55        '
  56
  57        test_expect_success "disable reflogs ($title)" '
  58                git config core.logallrefupdates false &&
  59                rm -rf .git/logs
  60        '
  61
  62        test_expect_success "setup basic history ($title)" '
  63                commit base
  64        '
  65
  66        test_expect_success "create and abandon some objects ($title)" '
  67                git checkout -b experiment &&
  68                commit abandon &&
  69                maybe_repack &&
  70                git checkout master &&
  71                git branch -D experiment
  72        '
  73
  74        test_expect_success "simulate time passing ($title)" '
  75                find .git/objects -type f |
  76                xargs test-chmtime -v -86400
  77        '
  78
  79        test_expect_success "start writing new commit with old blob ($title)" '
  80                tree=$(
  81                        GIT_INDEX_FILE=index.tmp &&
  82                        export GIT_INDEX_FILE &&
  83                        git read-tree HEAD &&
  84                        add unrelated &&
  85                        add abandon &&
  86                        git write-tree
  87                )
  88        '
  89
  90        test_expect_success "simultaneous gc ($title)" '
  91                git gc --prune=12.hours.ago
  92        '
  93
  94        test_expect_success "finish writing out commit ($title)" '
  95                commit=$(echo foo | git commit-tree -p HEAD $tree) &&
  96                git update-ref HEAD $commit
  97        '
  98
  99        # "abandon" blob should have been rescued by reference from new tree
 100        test_expect_success "repository passes fsck ($title)" '
 101                git fsck
 102        '
 103
 104        test_expect_success "abandon objects again ($title)" '
 105                git reset --hard HEAD^ &&
 106                find .git/objects -type f |
 107                xargs test-chmtime -v -86400
 108        '
 109
 110        test_expect_success "start writing new commit with same tree ($title)" '
 111                tree=$(
 112                        GIT_INDEX_FILE=index.tmp &&
 113                        export GIT_INDEX_FILE &&
 114                        git read-tree HEAD &&
 115                        add abandon &&
 116                        add unrelated &&
 117                        git write-tree
 118                )
 119        '
 120
 121        test_expect_success "simultaneous gc ($title)" '
 122                git gc --prune=12.hours.ago
 123        '
 124
 125        # tree should have been refreshed by write-tree
 126        test_expect_success "finish writing out commit ($title)" '
 127                commit=$(echo foo | git commit-tree -p HEAD $tree) &&
 128                git update-ref HEAD $commit
 129        '
 130done
 131
 132test_done