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_failure '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         git merge c1a &&
 101         test_cmp important other.c
 102 '
 103
 104 test_expect_success 'will not overwrite untracked subtree' '
 105         git reset --hard c0 &&
 106         rm -rf sub &&
 107         mkdir -p sub/f &&
 108         cp important sub/f/important &&
 109         test_must_fail git merge sub &&
 110         test_path_is_missing .git/MERGE_HEAD &&
 111         test_cmp important sub/f/important
 112 '
 113
 114 cat >expect <<\EOF
 115 error: The following untracked working tree files would be overwritten by merge:
 116         sub
 117         sub2
 118 Please move or remove them before you can merge.
 119 Aborting
 120 EOF
 121
 122 test_expect_success 'will not overwrite untracked file in leading path' '
 123         git reset --hard c0 &&
 124         rm -rf sub &&
 125         cp important sub &&
 126         cp important sub2 &&
 127         test_must_fail git merge sub 2>out &&
 128         test_cmp out expect &&
 129         test_path_is_missing .git/MERGE_HEAD &&
 130         test_cmp important sub &&
 131         test_cmp important sub2 &&
 132         rm -f sub sub2
 133 '
 134
 135 test_expect_success SYMLINKS 'will not overwrite untracked symlink in leading path' '
 136         git reset --hard c0 &&
 137         rm -rf sub &&
 138         mkdir sub2 &&
 139         ln -s sub2 sub &&
 140         test_must_fail git merge sub &&
 141         test_path_is_missing .git/MERGE_HEAD
 142 '
 143
 144 test_expect_success 'will not be confused by symlink in leading path' '
 145         git reset --hard c0 &&
 146         rm -rf sub &&
 147         test_ln_s_add sub2 sub &&
 148         git commit -m ln &&
 149         git checkout sub
 150 '
 151
 152 cat >expect <<\EOF
 153 error: Untracked working tree file 'c0.c' would be overwritten by merge.
 154 fatal: read-tree failed
 155 EOF
 156
 157 test_expect_success 'will not overwrite untracked file on unborn branch' '
 158         git reset --hard c0 &&
 159         git rm -fr . &&
 160         git checkout --orphan new &&
 161         cp important c0.c &&
 162         test_must_fail git merge c0 2>out &&
 163         test_i18ncmp out expect
 164 '
 165
 166 test_expect_success 'will not overwrite untracked file on unborn branch .git/MERGE_HEAD sanity etc.' '
 167         test_when_finished "rm c0.c" &&
 168         test_path_is_missing .git/MERGE_HEAD &&
 169         test_cmp important c0.c
 170 '
 171
 172 test_expect_success 'failed merge leaves unborn branch in the womb' '
 173         test_must_fail git rev-parse --verify HEAD
 174 '
 175
 176 test_expect_success 'set up unborn branch and content' '
 177         git symbolic-ref HEAD refs/heads/unborn &&
 178         rm -f .git/index &&
 179         echo foo > tracked-file &&
 180         git add tracked-file &&
 181         echo bar > untracked-file
 182 '
 183
 184 test_expect_success 'will not clobber WT/index when merging into unborn' '
 185         git merge master &&
 186         grep foo tracked-file &&
 187         git show :tracked-file >expect &&
 188         grep foo expect &&
 189         grep bar untracked-file
 190 '
 191
 192 test_done