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 $M
   7
   8 This test tries two-way merge (aka fast-forward with carry forward).
   9
  10 There is the head (called H) and another commit (called M), which is
  11 simply ahead of H.  The index and the work tree contains a state that
  12 is derived from H, but may also have local changes.  This test checks
  13 all the combinations described in the two-tree merge "carry forward"
  14 rules, found in <Documentation/git read-tree.txt>.
  15
  16 In the test, these paths are used:
  17         bozbar  - in H, stays in M, modified from bozbar to gnusto
  18         frotz   - not in H added in M
  19         nitfol  - in H, stays in M unmodified
  20         rezrov  - in H, deleted in M
  21         yomin   - not in H or M
  22 '
  23
  24 TEST_PASSES_SANITIZE_LEAK=true
  25 . ./test-lib.sh
  26 . "$TEST_DIRECTORY"/lib-read-tree.sh
  27
  28 read_tree_twoway () {
  29         git read-tree -m "$1" "$2" && git ls-files --stage
  30 }
  31
  32 compare_change () {
  33         sed -n >current \
  34             -e '/^--- /d; /^+++ /d; /^@@ /d;' \
  35             -e 's/^\([-+][0-7][0-7][0-7][0-7][0-7][0-7]\) '"$OID_REGEX"' /\1 X /p' \
  36             "$1"
  37         test_cmp expected current
  38 }
  39
  40 check_cache_at () {
  41         git diff-files -- "$1" >out &&
  42         clean_if_empty=$(cat out) &&
  43         case "$clean_if_empty" in
  44         '')  echo "$1: clean" ;;
  45         ?*)  echo "$1: dirty" ;;
  46         esac &&
  47         case "$2,$clean_if_empty" in
  48         clean,)         :     ;;
  49         clean,?*)       false ;;
  50         dirty,)         false ;;
  51         dirty,?*)       :     ;;
  52         esac
  53 }
  54
  55 cat >bozbar-old <<\EOF
  56 This is a sample file used in two-way fast-forward merge
  57 tests.  Its second line ends with a magic word bozbar
  58 which will be modified by the merged head to gnusto.
  59 It has some extra lines so that external tools can
  60 successfully merge independent changes made to later
  61 lines (such as this one), avoiding line conflicts.
  62 EOF
  63
  64 sed -e 's/bozbar/gnusto (earlier bozbar)/' bozbar-old >bozbar-new
  65
  66 test_expect_success 'setup' '
  67         echo frotz >frotz &&
  68         echo nitfol >nitfol &&
  69         cat bozbar-old >bozbar &&
  70         echo rezrov >rezrov &&
  71         echo yomin >yomin &&
  72         git update-index --add nitfol bozbar rezrov &&
  73         treeH=$(git write-tree) &&
  74         echo treeH $treeH &&
  75         git ls-tree $treeH &&
  76
  77         cat bozbar-new >bozbar &&
  78         git update-index --add frotz bozbar --force-remove rezrov &&
  79         git ls-files --stage >M.out &&
  80         treeM=$(git write-tree) &&
  81         echo treeM $treeM &&
  82         git ls-tree $treeM &&
  83         git diff-tree $treeH $treeM
  84 '
  85
  86 test_expect_success '1, 2, 3 - no carry forward' '
  87         rm -f .git/index &&
  88         read_tree_twoway $treeH $treeM &&
  89         git ls-files --stage >1-3.out &&
  90         test_cmp M.out 1-3.out &&
  91         check_cache_at bozbar dirty &&
  92         check_cache_at frotz dirty &&
  93         check_cache_at nitfol dirty
  94 '
  95 echo '+100644 X 0       yomin' >expected
  96
  97 test_expect_success '4 - carry forward local addition.' '
  98         rm -f .git/index &&
  99         read_tree_must_succeed $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 &&
 104         test_must_fail git diff --no-index M.out 4.out >4diff.out &&
 105         compare_change 4diff.out expected &&
 106         check_cache_at yomin clean
 107 '
 108
 109 test_expect_success '5 - carry forward local addition.' '
 110         rm -f .git/index &&
 111         read_tree_must_succeed $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 &&
 118         test_must_fail git diff --no-index M.out 5.out >5diff.out &&
 119         compare_change 5diff.out expected &&
 120         check_cache_at yomin dirty
 121 '
 122
 123 test_expect_success '6 - local addition already has the same.' '
 124         rm -f .git/index &&
 125         read_tree_must_succeed $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         test_cmp M.out 6.out &&
 131         check_cache_at frotz clean
 132 '
 133
 134 test_expect_success '7 - local addition already has the same.' '
 135         rm -f .git/index &&
 136         read_tree_must_succeed $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         test_cmp M.out 7.out &&
 144         check_cache_at frotz dirty
 145 '
 146
 147 test_expect_success '8 - conflicting addition.' '
 148         rm -f .git/index &&
 149         read_tree_must_succeed $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
 156 test_expect_success '9 - conflicting addition.' '
 157         rm -f .git/index &&
 158         read_tree_must_succeed $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
 166 test_expect_success '10 - path removed.' '
 167         rm -f .git/index &&
 168         read_tree_must_succeed $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         test_cmp M.out 10.out
 175 '
 176
 177 test_expect_success '11 - dirty path removed.' '
 178         rm -f .git/index &&
 179         read_tree_must_succeed $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
 187 test_expect_success '12 - unmatching local changes being removed.' '
 188         rm -f .git/index &&
 189         read_tree_must_succeed $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
 196 test_expect_success '13 - unmatching local changes being removed.' '
 197         rm -f .git/index &&
 198         read_tree_must_succeed $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
 206 cat >expected <<EOF
 207 -100644 X 0     nitfol
 208 +100644 X 0     nitfol
 209 EOF
 210
 211 test_expect_success '14 - unchanged in two heads.' '
 212         rm -f .git/index &&
 213         read_tree_must_succeed $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 &&
 219         test_must_fail git diff --no-index M.out 14.out >14diff.out &&
 220         compare_change 14diff.out expected &&
 221         check_cache_at nitfol clean
 222 '
 223
 224 test_expect_success '15 - unchanged in two heads.' '
 225         rm -f .git/index &&
 226         read_tree_must_succeed $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 &&
 233         test_must_fail git diff --no-index M.out 15.out >15diff.out &&
 234         compare_change 15diff.out expected &&
 235         check_cache_at nitfol dirty
 236 '
 237
 238 test_expect_success '16 - conflicting local change.' '
 239         rm -f .git/index &&
 240         read_tree_must_succeed $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
 247 test_expect_success '17 - conflicting local change.' '
 248         rm -f .git/index &&
 249         read_tree_must_succeed $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
 257 test_expect_success '18 - local change already having a good result.' '
 258         rm -f .git/index &&
 259         read_tree_must_succeed $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         test_cmp M.out 18.out &&
 266         check_cache_at bozbar clean
 267 '
 268
 269 test_expect_success '19 - local change already having a good result, further modified.' '
 270         rm -f .git/index &&
 271         read_tree_must_succeed $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         test_cmp M.out 19.out &&
 279         check_cache_at bozbar dirty
 280 '
 281
 282 test_expect_success '20 - no local change, use new tree.' '
 283         rm -f .git/index &&
 284         read_tree_must_succeed $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         test_cmp M.out 20.out &&
 291         check_cache_at bozbar dirty
 292 '
 293
 294 test_expect_success '21 - no local change, dirty cache.' '
 295         rm -f .git/index &&
 296         read_tree_must_succeed $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
 304 # This fails with straight two-way fast-forward.
 305 test_expect_success '22 - local change cache updated.' '
 306         rm -f .git/index &&
 307         read_tree_must_succeed $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 $treeM; then false; else :; fi
 312 '
 313
 314 # Also make sure we did not break DF vs DF/DF case.
 315 test_expect_success 'DF vs DF/DF case setup.' '
 316         rm -f .git/index &&
 317         echo DF >DF &&
 318         git update-index --add DF &&
 319         treeDF=$(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
 333 test_expect_success '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 $treeDFDF &&
 339         git ls-files --stage >DFDFcheck.out &&
 340         test_cmp DFDF.out DFDFcheck.out &&
 341         check_cache_at DF/DF dirty &&
 342         :
 343 '
 344
 345 test_expect_success 'a/b (untracked) vs a case setup.' '
 346         rm -f .git/index &&
 347         : >a &&
 348         git update-index --add a &&
 349         treeM=$(git write-tree) &&
 350         echo treeM $treeM &&
 351         git ls-tree $treeM &&
 352         git ls-files --stage >treeM.out &&
 353
 354         rm -f a &&
 355         git update-index --remove a &&
 356         mkdir a &&
 357         : >a/b &&
 358         treeH=$(git write-tree) &&
 359         echo treeH $treeH &&
 360         git ls-tree $treeH
 361 '
 362
 363 test_expect_success 'a/b (untracked) vs a, plus c/d case test.' '
 364         read_tree_u_must_fail -u -m "$treeH" "$treeM" &&
 365         git ls-files --stage &&
 366         test -f a/b
 367 '
 368
 369 test_expect_success 'read-tree supports the super-prefix' '
 370         cat <<-EOF >expect &&
 371                 error: Updating '\''fictional/a'\'' would lose untracked files in it
 372         EOF
 373         test_must_fail git read-tree --super-prefix fictional/ -u -m "$treeH" "$treeM" 2>actual &&
 374         test_cmp expect actual
 375 '
 376
 377 test_expect_success 'a/b vs a, plus c/d case setup.' '
 378         rm -f .git/index &&
 379         rm -fr a &&
 380         : >a &&
 381         mkdir c &&
 382         : >c/d &&
 383         git update-index --add a c/d &&
 384         treeM=$(git write-tree) &&
 385         echo treeM $treeM &&
 386         git ls-tree $treeM &&
 387         git ls-files --stage >treeM.out &&
 388
 389         rm -f a &&
 390         mkdir a &&
 391         : >a/b &&
 392         git update-index --add --remove a a/b &&
 393         treeH=$(git write-tree) &&
 394         echo treeH $treeH &&
 395         git ls-tree $treeH
 396 '
 397
 398 test_expect_success 'a/b vs a, plus c/d case test.' '
 399         read_tree_u_must_succeed -u -m "$treeH" "$treeM" &&
 400         git ls-files --stage >treeMcheck.out &&
 401         test_cmp treeM.out treeMcheck.out
 402 '
 403
 404 test_expect_success '-m references the correct modified tree' '
 405         echo >file-a &&
 406         echo >file-b &&
 407         git add file-a file-b &&
 408         git commit -a -m "test for correct modified tree" &&
 409         git branch initial-mod &&
 410         echo b >file-b &&
 411         git commit -a -m "B" &&
 412         echo a >file-a &&
 413         git add file-a &&
 414         git ls-tree $(git write-tree) file-a >expect &&
 415         read_tree_must_succeed -m HEAD initial-mod &&
 416         git ls-tree $(git write-tree) file-a >actual &&
 417         test_cmp expect actual
 418 '
 419
 420 test_done