t/t1001-read-tree-m-2way.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Junio C Hamano
   4 #
   5
   6 test_description='Two way merge with read-tree -m $H $M
   7
   8 This test tries two-way merge (aka fast forward with carry forward).
   9
  10 There is the head (called H) and another commit (called M), which is
  11 simply ahead of H.  The index and the work tree contains a state that
  12 is derived from H, but may also have local changes.  This test checks
  13 all the combinations described in the two-tree merge "carry forward"
  14 rules, found in <Documentation/git read-tree.txt>.
  15
  16 In the test, these paths are used:
  17         bozbar  - in H, stays in M, modified from bozbar to gnusto
  18         frotz   - not in H added in M
  19         nitfol  - in H, stays in M unmodified
  20         rezrov  - in H, deleted in M
  21         yomin   - not in H nor M
  22 '
  23 . ./test-lib.sh
  24
  25 read_tree_twoway () {
  26     git read-tree -m "$1" "$2" && git ls-files --stage
  27 }
  28
  29 _x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
  30 _x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
  31 compare_change () {
  32         sed -n >current \
  33             -e '/^--- /d; /^+++ /d; /^@@ /d;' \
  34             -e 's/^\([-+][0-7][0-7][0-7][0-7][0-7][0-7]\) '"$_x40"' /\1 X /p' \
  35             "$1"
  36         git diff expected current
  37 }
  38
  39 check_cache_at () {
  40         clean_if_empty=`git diff-files -- "$1"`
  41         case "$clean_if_empty" in
  42         '')  echo "$1: clean" ;;
  43         ?*)  echo "$1: dirty" ;;
  44         esac
  45         case "$2,$clean_if_empty" in
  46         clean,)         :     ;;
  47         clean,?*)       false ;;
  48         dirty,)         false ;;
  49         dirty,?*)       :     ;;
  50         esac
  51 }
  52
  53 cat >bozbar-old <<\EOF
  54 This is a sample file used in two-way fast forward merge
  55 tests.  Its second line ends with a magic word bozbar
  56 which will be modified by the merged head to gnusto.
  57 It has some extra lines so that external tools can
  58 successfully merge independent changes made to later
  59 lines (such as this one), avoiding line conflicts.
  60 EOF
  61
  62 sed -e 's/bozbar/gnusto (earlier bozbar)/' bozbar-old >bozbar-new
  63
  64 test_expect_success \
  65     setup \
  66     'echo frotz >frotz &&
  67      echo nitfol >nitfol &&
  68      cat bozbar-old >bozbar &&
  69      echo rezrov >rezrov &&
  70      echo yomin >yomin &&
  71      git update-index --add nitfol bozbar rezrov &&
  72      treeH=`git write-tree` &&
  73      echo treeH $treeH &&
  74      git ls-tree $treeH &&
  75
  76      cat bozbar-new >bozbar &&
  77      git update-index --add frotz bozbar --force-remove rezrov &&
  78      git ls-files --stage >M.out &&
  79      treeM=`git write-tree` &&
  80      echo treeM $treeM &&
  81      git ls-tree $treeM &&
  82      git diff-tree $treeH $treeM'
  83
  84 test_expect_success \
  85     '1, 2, 3 - no carry forward' \
  86     'rm -f .git/index &&
  87      read_tree_twoway $treeH $treeM &&
  88      git ls-files --stage >1-3.out &&
  89      git diff M.out 1-3.out &&
  90      check_cache_at bozbar dirty &&
  91      check_cache_at frotz dirty &&
  92      check_cache_at nitfol dirty'
  93
  94 echo '+100644 X 0       yomin' >expected
  95
  96 test_expect_success \
  97     '4 - carry forward local addition.' \
  98     'rm -f .git/index &&
  99      git read-tree $treeH &&
 100      git checkout-index -u -f -q -a &&
 101      git update-index --add yomin &&
 102      read_tree_twoway $treeH $treeM &&
 103      git ls-files --stage >4.out || return 1
 104      git diff M.out 4.out >4diff.out
 105      compare_change 4diff.out expected &&
 106      check_cache_at yomin clean'
 107
 108 test_expect_success \
 109     '5 - carry forward local addition.' \
 110     'rm -f .git/index &&
 111      git read-tree $treeH &&
 112      git checkout-index -u -f -q -a &&
 113      echo yomin >yomin &&
 114      git update-index --add yomin &&
 115      echo yomin yomin >yomin &&
 116      read_tree_twoway $treeH $treeM &&
 117      git ls-files --stage >5.out || return 1
 118      git diff M.out 5.out >5diff.out
 119      compare_change 5diff.out expected &&
 120      check_cache_at yomin dirty'
 121
 122 test_expect_success \
 123     '6 - local addition already has the same.' \
 124     'rm -f .git/index &&
 125      git read-tree $treeH &&
 126      git checkout-index -u -f -q -a &&
 127      git update-index --add frotz &&
 128      read_tree_twoway $treeH $treeM &&
 129      git ls-files --stage >6.out &&
 130      git diff M.out 6.out &&
 131      check_cache_at frotz clean'
 132
 133 test_expect_success \
 134     '7 - local addition already has the same.' \
 135     'rm -f .git/index &&
 136      git read-tree $treeH &&
 137      git checkout-index -u -f -q -a &&
 138      echo frotz >frotz &&
 139      git update-index --add frotz &&
 140      echo frotz frotz >frotz &&
 141      read_tree_twoway $treeH $treeM &&
 142      git ls-files --stage >7.out &&
 143      git diff M.out 7.out &&
 144      check_cache_at frotz dirty'
 145
 146 test_expect_success \
 147     '8 - conflicting addition.' \
 148     'rm -f .git/index &&
 149      git read-tree $treeH &&
 150      git checkout-index -u -f -q -a &&
 151      echo frotz frotz >frotz &&
 152      git update-index --add frotz &&
 153      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 154
 155 test_expect_success \
 156     '9 - conflicting addition.' \
 157     'rm -f .git/index &&
 158      git read-tree $treeH &&
 159      git checkout-index -u -f -q -a &&
 160      echo frotz frotz >frotz &&
 161      git update-index --add frotz &&
 162      echo frotz >frotz &&
 163      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 164
 165 test_expect_success \
 166     '10 - path removed.' \
 167     'rm -f .git/index &&
 168      git read-tree $treeH &&
 169      git checkout-index -u -f -q -a &&
 170      echo rezrov >rezrov &&
 171      git update-index --add rezrov &&
 172      read_tree_twoway $treeH $treeM &&
 173      git ls-files --stage >10.out &&
 174      git diff M.out 10.out'
 175
 176 test_expect_success \
 177     '11 - dirty path removed.' \
 178     'rm -f .git/index &&
 179      git read-tree $treeH &&
 180      git checkout-index -u -f -q -a &&
 181      echo rezrov >rezrov &&
 182      git update-index --add rezrov &&
 183      echo rezrov rezrov >rezrov &&
 184      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 185
 186 test_expect_success \
 187     '12 - unmatching local changes being removed.' \
 188     'rm -f .git/index &&
 189      git read-tree $treeH &&
 190      git checkout-index -u -f -q -a &&
 191      echo rezrov rezrov >rezrov &&
 192      git update-index --add rezrov &&
 193      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 194
 195 test_expect_success \
 196     '13 - unmatching local changes being removed.' \
 197     'rm -f .git/index &&
 198      git read-tree $treeH &&
 199      git checkout-index -u -f -q -a &&
 200      echo rezrov rezrov >rezrov &&
 201      git update-index --add rezrov &&
 202      echo rezrov >rezrov &&
 203      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 204
 205 cat >expected <<EOF
 206 -100644 X 0     nitfol
 207 +100644 X 0     nitfol
 208 EOF
 209
 210 test_expect_success \
 211     '14 - unchanged in two heads.' \
 212     'rm -f .git/index &&
 213      git read-tree $treeH &&
 214      git checkout-index -u -f -q -a &&
 215      echo nitfol nitfol >nitfol &&
 216      git update-index --add nitfol &&
 217      read_tree_twoway $treeH $treeM &&
 218      git ls-files --stage >14.out || return 1
 219      git diff M.out 14.out >14diff.out
 220      compare_change 14diff.out expected &&
 221      check_cache_at nitfol clean'
 222
 223 test_expect_success \
 224     '15 - unchanged in two heads.' \
 225     'rm -f .git/index &&
 226      git read-tree $treeH &&
 227      git checkout-index -u -f -q -a &&
 228      echo nitfol nitfol >nitfol &&
 229      git update-index --add nitfol &&
 230      echo nitfol nitfol nitfol >nitfol &&
 231      read_tree_twoway $treeH $treeM &&
 232      git ls-files --stage >15.out || return 1
 233      git diff M.out 15.out >15diff.out
 234      compare_change 15diff.out expected &&
 235      check_cache_at nitfol dirty'
 236
 237 test_expect_success \
 238     '16 - conflicting local change.' \
 239     'rm -f .git/index &&
 240      git read-tree $treeH &&
 241      git checkout-index -u -f -q -a &&
 242      echo bozbar bozbar >bozbar &&
 243      git update-index --add bozbar &&
 244      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 245
 246 test_expect_success \
 247     '17 - conflicting local change.' \
 248     'rm -f .git/index &&
 249      git read-tree $treeH &&
 250      git checkout-index -u -f -q -a &&
 251      echo bozbar bozbar >bozbar &&
 252      git update-index --add bozbar &&
 253      echo bozbar bozbar bozbar >bozbar &&
 254      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 255
 256 test_expect_success \
 257     '18 - local change already having a good result.' \
 258     'rm -f .git/index &&
 259      git read-tree $treeH &&
 260      git checkout-index -u -f -q -a &&
 261      cat bozbar-new >bozbar &&
 262      git update-index --add bozbar &&
 263      read_tree_twoway $treeH $treeM &&
 264      git ls-files --stage >18.out &&
 265      git diff M.out 18.out &&
 266      check_cache_at bozbar clean'
 267
 268 test_expect_success \
 269     '19 - local change already having a good result, further modified.' \
 270     'rm -f .git/index &&
 271      git read-tree $treeH &&
 272      git checkout-index -u -f -q -a &&
 273      cat bozbar-new >bozbar &&
 274      git update-index --add bozbar &&
 275      echo gnusto gnusto >bozbar &&
 276      read_tree_twoway $treeH $treeM &&
 277      git ls-files --stage >19.out &&
 278      git diff M.out 19.out &&
 279      check_cache_at bozbar dirty'
 280
 281 test_expect_success \
 282     '20 - no local change, use new tree.' \
 283     'rm -f .git/index &&
 284      git read-tree $treeH &&
 285      git checkout-index -u -f -q -a &&
 286      cat bozbar-old >bozbar &&
 287      git update-index --add bozbar &&
 288      read_tree_twoway $treeH $treeM &&
 289      git ls-files --stage >20.out &&
 290      git diff M.out 20.out &&
 291      check_cache_at bozbar dirty'
 292
 293 test_expect_success \
 294     '21 - no local change, dirty cache.' \
 295     'rm -f .git/index &&
 296      git read-tree $treeH &&
 297      git checkout-index -u -f -q -a &&
 298      cat bozbar-old >bozbar &&
 299      git update-index --add bozbar &&
 300      echo gnusto gnusto >bozbar &&
 301      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 302
 303 # This fails with straight two-way fast forward.
 304 test_expect_success \
 305     '22 - local change cache updated.' \
 306     'rm -f .git/index &&
 307      git read-tree $treeH &&
 308      git checkout-index -u -f -q -a &&
 309      sed -e "s/such as/SUCH AS/" bozbar-old >bozbar &&
 310      git update-index --add bozbar &&
 311      if read_tree_twoway $treeH $treeM; then false; else :; fi'
 312
 313 # Also make sure we did not break DF vs DF/DF case.
 314 test_expect_success \
 315     'DF vs DF/DF case setup.' \
 316     'rm -f .git/index &&
 317      echo DF >DF &&
 318      git update-index --add DF &&
 319      treeDF=`git write-tree` &&
 320      echo treeDF $treeDF &&
 321      git ls-tree $treeDF &&
 322
 323      rm -f DF &&
 324      mkdir DF &&
 325      echo DF/DF >DF/DF &&
 326      git update-index --add --remove DF DF/DF &&
 327      treeDFDF=`git write-tree` &&
 328      echo treeDFDF $treeDFDF &&
 329      git ls-tree $treeDFDF &&
 330      git ls-files --stage >DFDF.out'
 331
 332 test_expect_success \
 333     'DF vs DF/DF case test.' \
 334     'rm -f .git/index &&
 335      rm -fr DF &&
 336      echo DF >DF &&
 337      git update-index --add DF &&
 338      read_tree_twoway $treeDF $treeDFDF &&
 339      git ls-files --stage >DFDFcheck.out &&
 340      git diff DFDF.out DFDFcheck.out &&
 341      check_cache_at DF/DF dirty &&
 342      :'
 343
 344 test_done