t/t7607-merge-overwrite.sh

   1 #!/bin/sh
   2
   3 test_description='git-merge
   4
   5 Do not overwrite changes.'
   6
   7 . ./test-lib.sh
   8
   9 test_expect_success 'setup' '
  10         test_commit c0 c0.c &&
  11         test_commit c1 c1.c &&
  12         test_commit c1a c1.c "c1 a" &&
  13         git reset --hard c0 &&
  14         test_commit c2 c2.c &&
  15         git reset --hard c0 &&
  16         mkdir sub &&
  17         echo "sub/f" > sub/f &&
  18         mkdir sub2 &&
  19         echo "sub2/f" > sub2/f &&
  20         git add sub/f sub2/f &&
  21         git commit -m sub &&
  22         git tag sub &&
  23         echo "VERY IMPORTANT CHANGES" > important
  24 '
  25
  26 test_expect_success 'will not overwrite untracked file' '
  27         git reset --hard c1 &&
  28         cp important c2.c &&
  29         test_must_fail git merge c2 &&
  30         test_path_is_missing .git/MERGE_HEAD &&
  31         test_cmp important c2.c
  32 '
  33
  34 test_expect_success 'will overwrite tracked file' '
  35         git reset --hard c1 &&
  36         cp important c2.c &&
  37         git add c2.c &&
  38         git commit -m important &&
  39         git checkout c2
  40 '
  41
  42 test_expect_success 'will not overwrite new file' '
  43         git reset --hard c1 &&
  44         cp important c2.c &&
  45         git add c2.c &&
  46         test_must_fail git merge c2 &&
  47         test_path_is_missing .git/MERGE_HEAD &&
  48         test_cmp important c2.c
  49 '
  50
  51 test_expect_success 'will not overwrite staged changes' '
  52         git reset --hard c1 &&
  53         cp important c2.c &&
  54         git add c2.c &&
  55         rm c2.c &&
  56         test_must_fail git merge c2 &&
  57         test_path_is_missing .git/MERGE_HEAD &&
  58         git checkout c2.c &&
  59         test_cmp important c2.c
  60 '
  61
  62 test_expect_success 'will not overwrite removed file' '
  63         git reset --hard c1 &&
  64         git rm c1.c &&
  65         git commit -m "rm c1.c" &&
  66         cp important c1.c &&
  67         test_must_fail git merge c1a &&
  68         test_cmp important c1.c
  69 '
  70
  71 test_expect_success 'will not overwrite re-added file' '
  72         git reset --hard c1 &&
  73         git rm c1.c &&
  74         git commit -m "rm c1.c" &&
  75         cp important c1.c &&
  76         git add c1.c &&
  77         test_must_fail git merge c1a &&
  78         test_path_is_missing .git/MERGE_HEAD &&
  79         test_cmp important c1.c
  80 '
  81
  82 test_expect_success 'will not overwrite removed file with staged changes' '
  83         git reset --hard c1 &&
  84         git rm c1.c &&
  85         git commit -m "rm c1.c" &&
  86         cp important c1.c &&
  87         git add c1.c &&
  88         rm c1.c &&
  89         test_must_fail git merge c1a &&
  90         test_path_is_missing .git/MERGE_HEAD &&
  91         git checkout c1.c &&
  92         test_cmp important c1.c
  93 '
  94
  95 test_expect_success 'will not overwrite unstaged changes in renamed file' '
  96         git reset --hard c1 &&
  97         git mv c1.c other.c &&
  98         git commit -m rename &&
  99         cp important other.c &&
 100         test_must_fail git merge c1a >out &&
 101         test_i18ngrep "Refusing to lose dirty file at other.c" out &&
 102         test_path_is_file other.c~HEAD &&
 103         test $(git hash-object other.c~HEAD) = $(git rev-parse c1a:c1.c) &&
 104         test_cmp important other.c
 105 '
 106
 107 test_expect_success 'will not overwrite untracked subtree' '
 108         git reset --hard c0 &&
 109         rm -rf sub &&
 110         mkdir -p sub/f &&
 111         cp important sub/f/important &&
 112         test_must_fail git merge sub &&
 113         test_path_is_missing .git/MERGE_HEAD &&
 114         test_cmp important sub/f/important
 115 '
 116
 117 cat >expect <<\EOF
 118 error: The following untracked working tree files would be overwritten by merge:
 119         sub
 120         sub2
 121 Please move or remove them before you merge.
 122 Aborting
 123 EOF
 124
 125 test_expect_success 'will not overwrite untracked file in leading path' '
 126         git reset --hard c0 &&
 127         rm -rf sub &&
 128         cp important sub &&
 129         cp important sub2 &&
 130         test_must_fail git merge sub 2>out &&
 131         test_i18ncmp out expect &&
 132         test_path_is_missing .git/MERGE_HEAD &&
 133         test_cmp important sub &&
 134         test_cmp important sub2 &&
 135         rm -f sub sub2
 136 '
 137
 138 test_expect_success SYMLINKS 'will not overwrite untracked symlink in leading path' '
 139         git reset --hard c0 &&
 140         rm -rf sub &&
 141         mkdir sub2 &&
 142         ln -s sub2 sub &&
 143         test_must_fail git merge sub &&
 144         test_path_is_missing .git/MERGE_HEAD
 145 '
 146
 147 test_expect_success 'will not be confused by symlink in leading path' '
 148         git reset --hard c0 &&
 149         rm -rf sub &&
 150         test_ln_s_add sub2 sub &&
 151         git commit -m ln &&
 152         git checkout sub
 153 '
 154
 155 cat >expect <<\EOF
 156 error: Untracked working tree file 'c0.c' would be overwritten by merge.
 157 fatal: read-tree failed
 158 EOF
 159
 160 test_expect_success 'will not overwrite untracked file on unborn branch' '
 161         git reset --hard c0 &&
 162         git rm -fr . &&
 163         git checkout --orphan new &&
 164         cp important c0.c &&
 165         test_must_fail git merge c0 2>out &&
 166         test_i18ncmp out expect
 167 '
 168
 169 test_expect_success 'will not overwrite untracked file on unborn branch .git/MERGE_HEAD sanity etc.' '
 170         test_when_finished "rm c0.c" &&
 171         test_path_is_missing .git/MERGE_HEAD &&
 172         test_cmp important c0.c
 173 '
 174
 175 test_expect_success 'failed merge leaves unborn branch in the womb' '
 176         test_must_fail git rev-parse --verify HEAD
 177 '
 178
 179 test_expect_success 'set up unborn branch and content' '
 180         git symbolic-ref HEAD refs/heads/unborn &&
 181         rm -f .git/index &&
 182         echo foo > tracked-file &&
 183         git add tracked-file &&
 184         echo bar > untracked-file
 185 '
 186
 187 test_expect_success 'will not clobber WT/index when merging into unborn' '
 188         git merge master &&
 189         grep foo tracked-file &&
 190         git show :tracked-file >expect &&
 191         grep foo expect &&
 192         grep bar untracked-file
 193 '
 194
 195 test_done