t/t7408-submodule-reference.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2009, Red Hat Inc, Author: Michael S. Tsirkin (mst@redhat.com)
   4 #
   5
   6 test_description='test clone --reference'
   7 . ./test-lib.sh
   8
   9 base_dir=$(pwd)
  10
  11 test_alternate_is_used () {
  12         alternates_file="$1" &&
  13         working_dir="$2" &&
  14         test_line_count = 1 "$alternates_file" &&
  15         echo "0 objects, 0 kilobytes" >expect &&
  16         git -C "$working_dir" count-objects >actual &&
  17         test_cmp expect actual
  18 }
  19
  20 test_expect_success 'preparing first repository' '
  21         test_create_repo A &&
  22         (
  23                 cd A &&
  24                 echo first >file1 &&
  25                 git add file1 &&
  26                 git commit -m A-initial
  27         )
  28 '
  29
  30 test_expect_success 'preparing second repository' '
  31         git clone A B &&
  32         (
  33                 cd B &&
  34                 echo second >file2 &&
  35                 git add file2 &&
  36                 git commit -m B-addition &&
  37                 git repack -a -d &&
  38                 git prune
  39         )
  40 '
  41
  42 test_expect_success 'preparing superproject' '
  43         test_create_repo super &&
  44         (
  45                 cd super &&
  46                 echo file >file &&
  47                 git add file &&
  48                 git commit -m B-super-initial
  49         )
  50 '
  51
  52 test_expect_success 'submodule add --reference uses alternates' '
  53         (
  54                 cd super &&
  55                 git submodule add --reference ../B "file://$base_dir/A" sub &&
  56                 git commit -m B-super-added &&
  57                 git repack -ad
  58         ) &&
  59         test_alternate_is_used super/.git/modules/sub/objects/info/alternates super/sub
  60 '
  61
  62 test_expect_success 'that reference gets used with add' '
  63         (
  64                 cd super/sub &&
  65                 echo "0 objects, 0 kilobytes" >expected &&
  66                 git count-objects >current &&
  67                 diff expected current
  68         )
  69 '
  70
  71 # The tests up to this point, and repositories created by them
  72 # (A, B, super and super/sub), are about setting up the stage
  73 # for subsequent tests and meant to be kept throughout the
  74 # remainder of the test.
  75 # Tests from here on, if they create their own test repository,
  76 # are expected to clean after themselves.
  77
  78 test_expect_success 'updating superproject keeps alternates' '
  79         test_when_finished "rm -rf super-clone" &&
  80         git clone super super-clone &&
  81         git -C super-clone submodule update --init --reference ../B &&
  82         test_alternate_is_used super-clone/.git/modules/sub/objects/info/alternates super-clone/sub
  83 '
  84
  85 test_expect_success 'submodules use alternates when cloning a superproject' '
  86         test_when_finished "rm -rf super-clone" &&
  87         git clone --reference super --recursive super super-clone &&
  88         (
  89                 cd super-clone &&
  90                 # test superproject has alternates setup correctly
  91                 test_alternate_is_used .git/objects/info/alternates . &&
  92                 # test submodule has correct setup
  93                 test_alternate_is_used .git/modules/sub/objects/info/alternates sub
  94         )
  95 '
  96
  97 test_expect_success 'missing submodule alternate fails clone and submodule update' '
  98         test_when_finished "rm -rf super-clone" &&
  99         git clone super super2 &&
 100         test_must_fail git clone --recursive --reference super2 super2 super-clone &&
 101         (
 102                 cd super-clone &&
 103                 # test superproject has alternates setup correctly
 104                 test_alternate_is_used .git/objects/info/alternates . &&
 105                 # update of the submodule succeeds
 106                 test_must_fail git submodule update --init &&
 107                 # and we have no alternates:
 108                 test_must_fail test_alternate_is_used .git/modules/sub/objects/info/alternates sub &&
 109                 test_must_fail test_path_is_file sub/file1
 110         )
 111 '
 112
 113 test_expect_success 'ignoring missing submodule alternates passes clone and submodule update' '
 114         test_when_finished "rm -rf super-clone" &&
 115         git clone --reference-if-able super2 --recursive super2 super-clone &&
 116         (
 117                 cd super-clone &&
 118                 # test superproject has alternates setup correctly
 119                 test_alternate_is_used .git/objects/info/alternates . &&
 120                 # update of the submodule succeeds
 121                 git submodule update --init &&
 122                 # and we have no alternates:
 123                 test_must_fail test_alternate_is_used .git/modules/sub/objects/info/alternates sub &&
 124                 test_path_is_file sub/file1
 125         )
 126 '
 127
 128 test_expect_success 'preparing second superproject with a nested submodule plus partial clone' '
 129         test_create_repo supersuper &&
 130         (
 131                 cd supersuper &&
 132                 echo "I am super super." >file &&
 133                 git add file &&
 134                 git commit -m B-super-super-initial
 135                 git submodule add "file://$base_dir/super" subwithsub &&
 136                 git commit -m B-super-super-added &&
 137                 git submodule update --init --recursive &&
 138                 git repack -ad
 139         ) &&
 140         git clone supersuper supersuper2 &&
 141         (
 142                 cd supersuper2 &&
 143                 git submodule update --init
 144         )
 145 '
 146
 147 # At this point there are three root-level positories: A, B, super and super2
 148
 149 test_expect_success 'nested submodule alternate in works and is actually used' '
 150         test_when_finished "rm -rf supersuper-clone" &&
 151         git clone --recursive --reference supersuper supersuper supersuper-clone &&
 152         (
 153                 cd supersuper-clone &&
 154                 # test superproject has alternates setup correctly
 155                 test_alternate_is_used .git/objects/info/alternates . &&
 156                 # immediate submodule has alternate:
 157                 test_alternate_is_used .git/modules/subwithsub/objects/info/alternates subwithsub &&
 158                 # nested submodule also has alternate:
 159                 test_alternate_is_used .git/modules/subwithsub/modules/sub/objects/info/alternates subwithsub/sub
 160         )
 161 '
 162
 163 check_that_two_of_three_alternates_are_used() {
 164         test_alternate_is_used .git/objects/info/alternates . &&
 165         # immediate submodule has alternate:
 166         test_alternate_is_used .git/modules/subwithsub/objects/info/alternates subwithsub &&
 167         # but nested submodule has no alternate:
 168         test_must_fail test_alternate_is_used .git/modules/subwithsub/modules/sub/objects/info/alternates subwithsub/sub
 169 }
 170
 171
 172 test_expect_success 'missing nested submodule alternate fails clone and submodule update' '
 173         test_when_finished "rm -rf supersuper-clone" &&
 174         test_must_fail git clone --recursive --reference supersuper2 supersuper2 supersuper-clone &&
 175         (
 176                 cd supersuper-clone &&
 177                 check_that_two_of_three_alternates_are_used &&
 178                 # update of the submodule fails
 179                 test_must_fail git submodule update --init --recursive
 180         )
 181 '
 182
 183 test_expect_success 'missing nested submodule alternate in --reference-if-able mode' '
 184         test_when_finished "rm -rf supersuper-clone" &&
 185         git clone --recursive --reference-if-able supersuper2 supersuper2 supersuper-clone &&
 186         (
 187                 cd supersuper-clone &&
 188                 check_that_two_of_three_alternates_are_used &&
 189                 # update of the submodule succeeds
 190                 git submodule update --init --recursive
 191         )
 192 '
 193
 194 test_done