t/t5613-info-alternate.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (C) 2006 Martin Waitz <tali@admingilde.org>
   4 #
   5
   6 test_description='test transitive info/alternate entries'
   7 . ./test-lib.sh
   8
   9 test_expect_success 'preparing first repository' '
  10         test_create_repo A && (
  11                 cd A &&
  12                 echo "Hello World" > file1 &&
  13                 git add file1 &&
  14                 git commit -m "Initial commit" file1 &&
  15                 git repack -a -d &&
  16                 git prune
  17         )
  18 '
  19
  20 test_expect_success 'preparing second repository' '
  21         git clone -l -s A B && (
  22                 cd B &&
  23                 echo "foo bar" > file2 &&
  24                 git add file2 &&
  25                 git commit -m "next commit" file2 &&
  26                 git repack -a -d -l &&
  27                 git prune
  28         )
  29 '
  30
  31 test_expect_success 'preparing third repository' '
  32         git clone -l -s B C && (
  33                 cd C &&
  34                 echo "Goodbye, cruel world" > file3 &&
  35                 git add file3 &&
  36                 git commit -m "one more" file3 &&
  37                 git repack -a -d -l &&
  38                 git prune
  39         )
  40 '
  41
  42 test_expect_success 'count-objects shows the alternates' '
  43         cat >expect <<-EOF &&
  44         alternate: $(pwd)/B/.git/objects
  45         alternate: $(pwd)/A/.git/objects
  46         EOF
  47         git -C C count-objects -v >actual &&
  48         grep ^alternate: actual >actual.alternates &&
  49         test_cmp expect actual.alternates
  50 '
  51
  52 # Note: These tests depend on the hard-coded value of 5 as the maximum depth
  53 # we will follow recursion. We start the depth at 0 and count links, not
  54 # repositories. This means that in a chain like:
  55 #
  56 #   A --> B --> C --> D --> E --> F --> G --> H
  57 #      0     1     2     3     4     5     6
  58 #
  59 # we are OK at "G", but break at "H", even though "H" is actually the 8th
  60 # repository, not the 6th, which you might expect. Counting the links allows
  61 # N+1 repositories, and counting from 0 to 5 inclusive allows 6 links.
  62 #
  63 # Note also that we must use "--bare -l" to make the link to H. The "-l"
  64 # ensures we do not do a connectivity check, and the "--bare" makes sure
  65 # we do not try to checkout the result (which needs objects), either of
  66 # which would cause the clone to fail.
  67 test_expect_success 'creating too deep nesting' '
  68         git clone -l -s C D &&
  69         git clone -l -s D E &&
  70         git clone -l -s E F &&
  71         git clone -l -s F G &&
  72         git clone --bare -l -s G H
  73 '
  74
  75 test_expect_success 'validity of seventh repository' '
  76         git -C G fsck
  77 '
  78
  79 test_expect_success 'invalidity of eighth repository' '
  80         test_must_fail git -C H fsck
  81 '
  82
  83 test_expect_success 'breaking of loops' '
  84         echo "$(pwd)"/B/.git/objects >>A/.git/objects/info/alternates &&
  85         git -C C fsck
  86 '
  87
  88 test_expect_success 'that info/alternates is necessary' '
  89         rm -f C/.git/objects/info/alternates &&
  90         test_must_fail git -C C fsck
  91 '
  92
  93 test_expect_success 'that relative alternate is possible for current dir' '
  94         echo "../../../B/.git/objects" >C/.git/objects/info/alternates &&
  95         git fsck
  96 '
  97
  98 test_expect_success 'that relative alternate is recursive' '
  99         git -C D fsck
 100 '
 101
 102 # we can reach "A" from our new repo both directly, and via "C".
 103 # The deep/subdir is there to make sure we are not doing a stupid
 104 # pure-text comparison of the alternate names.
 105 test_expect_success 'relative duplicates are eliminated' '
 106         mkdir -p deep/subdir &&
 107         git init --bare deep/subdir/duplicate.git &&
 108         cat >deep/subdir/duplicate.git/objects/info/alternates <<-\EOF &&
 109         ../../../../C/.git/objects
 110         ../../../../A/.git/objects
 111         EOF
 112         cat >expect <<-EOF &&
 113         alternate: $(pwd)/C/.git/objects
 114         alternate: $(pwd)/B/.git/objects
 115         alternate: $(pwd)/A/.git/objects
 116         EOF
 117         git -C deep/subdir/duplicate.git count-objects -v >actual &&
 118         grep ^alternate: actual >actual.alternates &&
 119         test_cmp expect actual.alternates
 120 '
 121
 122 test_expect_success CASE_INSENSITIVE_FS 'dup finding can be case-insensitive' '
 123         git init --bare insensitive.git &&
 124         # the previous entry for "A" will have used uppercase
 125         cat >insensitive.git/objects/info/alternates <<-\EOF &&
 126         ../../C/.git/objects
 127         ../../a/.git/objects
 128         EOF
 129         cat >expect <<-EOF &&
 130         alternate: $(pwd)/C/.git/objects
 131         alternate: $(pwd)/B/.git/objects
 132         alternate: $(pwd)/A/.git/objects
 133         EOF
 134         git -C insensitive.git count-objects -v >actual &&
 135         grep ^alternate: actual >actual.alternates &&
 136         test_cmp expect actual.alternates
 137 '
 138
 139 test_done