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-rwxr-xr-xt/t1001-read-tree-m-2way.sh420
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+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano
+#
+
+test_description='Two way merge with read-tree -m $H $M
+
+This test tries two-way merge (aka fast-forward with carry forward).
+
+There is the head (called H) and another commit (called M), which is
+simply ahead of H. The index and the work tree contains a state that
+is derived from H, but may also have local changes. This test checks
+all the combinations described in the two-tree merge "carry forward"
+rules, found in <Documentation/git read-tree.txt>.
+
+In the test, these paths are used:
+ bozbar - in H, stays in M, modified from bozbar to gnusto
+ frotz - not in H added in M
+ nitfol - in H, stays in M unmodified
+ rezrov - in H, deleted in M
+ yomin - not in H or M
+'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-read-tree.sh
+
+read_tree_twoway () {
+ git read-tree -m "$1" "$2" && git ls-files --stage
+}
+
+compare_change () {
+ sed -n >current \
+ -e '/^--- /d; /^+++ /d; /^@@ /d;' \
+ -e 's/^\([-+][0-7][0-7][0-7][0-7][0-7][0-7]\) '"$OID_REGEX"' /\1 X /p' \
+ "$1"
+ test_cmp expected current
+}
+
+check_cache_at () {
+ git diff-files -- "$1" >out &&
+ clean_if_empty=$(cat out) &&
+ case "$clean_if_empty" in
+ '') echo "$1: clean" ;;
+ ?*) echo "$1: dirty" ;;
+ esac &&
+ case "$2,$clean_if_empty" in
+ clean,) : ;;
+ clean,?*) false ;;
+ dirty,) false ;;
+ dirty,?*) : ;;
+ esac
+}
+
+cat >bozbar-old <<\EOF
+This is a sample file used in two-way fast-forward merge
+tests. Its second line ends with a magic word bozbar
+which will be modified by the merged head to gnusto.
+It has some extra lines so that external tools can
+successfully merge independent changes made to later
+lines (such as this one), avoiding line conflicts.
+EOF
+
+sed -e 's/bozbar/gnusto (earlier bozbar)/' bozbar-old >bozbar-new
+
+test_expect_success 'setup' '
+ echo frotz >frotz &&
+ echo nitfol >nitfol &&
+ cat bozbar-old >bozbar &&
+ echo rezrov >rezrov &&
+ echo yomin >yomin &&
+ git update-index --add nitfol bozbar rezrov &&
+ treeH=$(git write-tree) &&
+ echo treeH $treeH &&
+ git ls-tree $treeH &&
+
+ cat bozbar-new >bozbar &&
+ git update-index --add frotz bozbar --force-remove rezrov &&
+ git ls-files --stage >M.out &&
+ treeM=$(git write-tree) &&
+ echo treeM $treeM &&
+ git ls-tree $treeM &&
+ git diff-tree $treeH $treeM
+'
+
+test_expect_success '1, 2, 3 - no carry forward' '
+ rm -f .git/index &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >1-3.out &&
+ test_cmp M.out 1-3.out &&
+ check_cache_at bozbar dirty &&
+ check_cache_at frotz dirty &&
+ check_cache_at nitfol dirty
+'
+echo '+100644 X 0 yomin' >expected
+
+test_expect_success '4 - carry forward local addition.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ git update-index --add yomin &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >4.out &&
+ test_must_fail git diff --no-index M.out 4.out >4diff.out &&
+ compare_change 4diff.out expected &&
+ check_cache_at yomin clean
+'
+
+test_expect_success '5 - carry forward local addition.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo yomin >yomin &&
+ git update-index --add yomin &&
+ echo yomin yomin >yomin &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >5.out &&
+ test_must_fail git diff --no-index M.out 5.out >5diff.out &&
+ compare_change 5diff.out expected &&
+ check_cache_at yomin dirty
+'
+
+test_expect_success '6 - local addition already has the same.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ git update-index --add frotz &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >6.out &&
+ test_cmp M.out 6.out &&
+ check_cache_at frotz clean
+'
+
+test_expect_success '7 - local addition already has the same.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo frotz >frotz &&
+ git update-index --add frotz &&
+ echo frotz frotz >frotz &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >7.out &&
+ test_cmp M.out 7.out &&
+ check_cache_at frotz dirty
+'
+
+test_expect_success '8 - conflicting addition.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo frotz frotz >frotz &&
+ git update-index --add frotz &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '9 - conflicting addition.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo frotz frotz >frotz &&
+ git update-index --add frotz &&
+ echo frotz >frotz &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '10 - path removed.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo rezrov >rezrov &&
+ git update-index --add rezrov &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >10.out &&
+ test_cmp M.out 10.out
+'
+
+test_expect_success '11 - dirty path removed.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo rezrov >rezrov &&
+ git update-index --add rezrov &&
+ echo rezrov rezrov >rezrov &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '12 - unmatching local changes being removed.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo rezrov rezrov >rezrov &&
+ git update-index --add rezrov &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '13 - unmatching local changes being removed.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo rezrov rezrov >rezrov &&
+ git update-index --add rezrov &&
+ echo rezrov >rezrov &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+cat >expected <<EOF
+-100644 X 0 nitfol
++100644 X 0 nitfol
+EOF
+
+test_expect_success '14 - unchanged in two heads.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo nitfol nitfol >nitfol &&
+ git update-index --add nitfol &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >14.out &&
+ test_must_fail git diff --no-index M.out 14.out >14diff.out &&
+ compare_change 14diff.out expected &&
+ check_cache_at nitfol clean
+'
+
+test_expect_success '15 - unchanged in two heads.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo nitfol nitfol >nitfol &&
+ git update-index --add nitfol &&
+ echo nitfol nitfol nitfol >nitfol &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >15.out &&
+ test_must_fail git diff --no-index M.out 15.out >15diff.out &&
+ compare_change 15diff.out expected &&
+ check_cache_at nitfol dirty
+'
+
+test_expect_success '16 - conflicting local change.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo bozbar bozbar >bozbar &&
+ git update-index --add bozbar &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '17 - conflicting local change.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ echo bozbar bozbar >bozbar &&
+ git update-index --add bozbar &&
+ echo bozbar bozbar bozbar >bozbar &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+test_expect_success '18 - local change already having a good result.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ cat bozbar-new >bozbar &&
+ git update-index --add bozbar &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >18.out &&
+ test_cmp M.out 18.out &&
+ check_cache_at bozbar clean
+'
+
+test_expect_success '19 - local change already having a good result, further modified.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ cat bozbar-new >bozbar &&
+ git update-index --add bozbar &&
+ echo gnusto gnusto >bozbar &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >19.out &&
+ test_cmp M.out 19.out &&
+ check_cache_at bozbar dirty
+'
+
+test_expect_success '20 - no local change, use new tree.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ cat bozbar-old >bozbar &&
+ git update-index --add bozbar &&
+ read_tree_twoway $treeH $treeM &&
+ git ls-files --stage >20.out &&
+ test_cmp M.out 20.out &&
+ check_cache_at bozbar dirty
+'
+
+test_expect_success '21 - no local change, dirty cache.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ cat bozbar-old >bozbar &&
+ git update-index --add bozbar &&
+ echo gnusto gnusto >bozbar &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+# This fails with straight two-way fast-forward.
+test_expect_success '22 - local change cache updated.' '
+ rm -f .git/index &&
+ read_tree_must_succeed $treeH &&
+ git checkout-index -u -f -q -a &&
+ sed -e "s/such as/SUCH AS/" bozbar-old >bozbar &&
+ git update-index --add bozbar &&
+ if read_tree_twoway $treeH $treeM; then false; else :; fi
+'
+
+# Also make sure we did not break DF vs DF/DF case.
+test_expect_success 'DF vs DF/DF case setup.' '
+ rm -f .git/index &&
+ echo DF >DF &&
+ git update-index --add DF &&
+ treeDF=$(git write-tree) &&
+ echo treeDF $treeDF &&
+ git ls-tree $treeDF &&
+
+ rm -f DF &&
+ mkdir DF &&
+ echo DF/DF >DF/DF &&
+ git update-index --add --remove DF DF/DF &&
+ treeDFDF=$(git write-tree) &&
+ echo treeDFDF $treeDFDF &&
+ git ls-tree $treeDFDF &&
+ git ls-files --stage >DFDF.out
+'
+
+test_expect_success 'DF vs DF/DF case test.' '
+ rm -f .git/index &&
+ rm -fr DF &&
+ echo DF >DF &&
+ git update-index --add DF &&
+ read_tree_twoway $treeDF $treeDFDF &&
+ git ls-files --stage >DFDFcheck.out &&
+ test_cmp DFDF.out DFDFcheck.out &&
+ check_cache_at DF/DF dirty &&
+ :
+'
+
+test_expect_success 'a/b (untracked) vs a case setup.' '
+ rm -f .git/index &&
+ : >a &&
+ git update-index --add a &&
+ treeM=$(git write-tree) &&
+ echo treeM $treeM &&
+ git ls-tree $treeM &&
+ git ls-files --stage >treeM.out &&
+
+ rm -f a &&
+ git update-index --remove a &&
+ mkdir a &&
+ : >a/b &&
+ treeH=$(git write-tree) &&
+ echo treeH $treeH &&
+ git ls-tree $treeH
+'
+
+test_expect_success 'a/b (untracked) vs a, plus c/d case test.' '
+ read_tree_u_must_fail -u -m "$treeH" "$treeM" &&
+ git ls-files --stage &&
+ test -f a/b
+'
+
+test_expect_success 'read-tree supports the super-prefix' '
+ cat <<-EOF >expect &&
+ error: Updating '\''fictional/a'\'' would lose untracked files in it
+ EOF
+ test_must_fail git --super-prefix fictional/ read-tree -u -m "$treeH" "$treeM" 2>actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'a/b vs a, plus c/d case setup.' '
+ rm -f .git/index &&
+ rm -fr a &&
+ : >a &&
+ mkdir c &&
+ : >c/d &&
+ git update-index --add a c/d &&
+ treeM=$(git write-tree) &&
+ echo treeM $treeM &&
+ git ls-tree $treeM &&
+ git ls-files --stage >treeM.out &&
+
+ rm -f a &&
+ mkdir a &&
+ : >a/b &&
+ git update-index --add --remove a a/b &&
+ treeH=$(git write-tree) &&
+ echo treeH $treeH &&
+ git ls-tree $treeH
+'
+
+test_expect_success 'a/b vs a, plus c/d case test.' '
+ read_tree_u_must_succeed -u -m "$treeH" "$treeM" &&
+ git ls-files --stage | tee >treeMcheck.out &&
+ test_cmp treeM.out treeMcheck.out
+'
+
+test_expect_success '-m references the correct modified tree' '
+ echo >file-a &&
+ echo >file-b &&
+ git add file-a file-b &&
+ git commit -a -m "test for correct modified tree" &&
+ git branch initial-mod &&
+ echo b >file-b &&
+ git commit -a -m "B" &&
+ echo a >file-a &&
+ git add file-a &&
+ git ls-tree $(git write-tree) file-a >expect &&
+ read_tree_must_succeed -m HEAD initial-mod &&
+ git ls-tree $(git write-tree) file-a >actual &&
+ test_cmp expect actual
+'
+
+test_done