merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 295 insertions, 0 deletions

diff --git a/third_party/git/t/t7110-reset-merge.sh b/third_party/git/t/t7110-reset-merge.sh
new file mode 100755
index 000000000000..a82a07a04a85
--- /dev/null
+++ b/third_party/git/t/t7110-reset-merge.sh
@@ -0,0 +1,295 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Christian Couder
+#
+
+test_description='Tests for "git reset" with "--merge" and "--keep" options'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+    for i in 1 2 3; do echo line $i; done >file1 &&
+    cat file1 >file2 &&
+    git add file1 file2 &&
+    test_tick &&
+    git commit -m "Initial commit" &&
+    git tag initial &&
+    echo line 4 >>file1 &&
+    cat file1 >file2 &&
+    test_tick &&
+    git commit -m "add line 4 to file1" file1 &&
+    git tag second
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     C       C     C    D     --merge  D       D     D
+# file2:     C       D     D    D     --merge  C       D     D
+test_expect_success 'reset --merge is ok with changes in file it does not touch' '
+    git reset --merge HEAD^ &&
+    ! grep 4 file1 &&
+    grep 4 file2 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
+    test -z "$(git diff --cached)"
+'
+
+test_expect_success 'reset --merge is ok when switching back' '
+    git reset --merge second &&
+    grep 4 file1 &&
+    grep 4 file2 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
+    test -z "$(git diff --cached)"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     C       C     C    D     --keep   D       D     D
+# file2:     C       D     D    D     --keep   C       D     D
+test_expect_success 'reset --keep is ok with changes in file it does not touch' '
+    git reset --hard second &&
+    cat file1 >file2 &&
+    git reset --keep HEAD^ &&
+    ! grep 4 file1 &&
+    grep 4 file2 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
+    test -z "$(git diff --cached)"
+'
+
+test_expect_success 'reset --keep is ok when switching back' '
+    git reset --keep second &&
+    grep 4 file1 &&
+    grep 4 file2 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
+    test -z "$(git diff --cached)"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     B       B     C    D     --merge  D       D     D
+# file2:     C       D     D    D     --merge  C       D     D
+test_expect_success 'reset --merge discards changes added to index (1)' '
+    git reset --hard second &&
+    cat file1 >file2 &&
+    echo "line 5" >> file1 &&
+    git add file1 &&
+    git reset --merge HEAD^ &&
+    ! grep 4 file1 &&
+    ! grep 5 file1 &&
+    grep 4 file2 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
+    test -z "$(git diff --cached)"
+'
+
+test_expect_success 'reset --merge is ok again when switching back (1)' '
+    git reset --hard initial &&
+    echo "line 5" >> file2 &&
+    git add file2 &&
+    git reset --merge second &&
+    ! grep 4 file2 &&
+    ! grep 5 file1 &&
+    grep 4 file1 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
+    test -z "$(git diff --cached)"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     B       B     C    D     --keep   (disallowed)
+test_expect_success 'reset --keep fails with changes in index in files it touches' '
+    git reset --hard second &&
+    echo "line 5" >> file1 &&
+    git add file1 &&
+    test_must_fail git reset --keep HEAD^
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     C       C     C    D     --merge  D       D     D
+# file2:     C       C     D    D     --merge  D       D     D
+test_expect_success 'reset --merge discards changes added to index (2)' '
+    git reset --hard second &&
+    echo "line 4" >> file2 &&
+    git add file2 &&
+    git reset --merge HEAD^ &&
+    ! grep 4 file2 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
+    test -z "$(git diff)" &&
+    test -z "$(git diff --cached)"
+'
+
+test_expect_success 'reset --merge is ok again when switching back (2)' '
+    git reset --hard initial &&
+    git reset --merge second &&
+    ! grep 4 file2 &&
+    grep 4 file1 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
+    test -z "$(git diff --cached)"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     C       C     C    D     --keep   D       D     D
+# file2:     C       C     D    D     --keep   C       D     D
+test_expect_success 'reset --keep keeps changes it does not touch' '
+    git reset --hard second &&
+    echo "line 4" >> file2 &&
+    git add file2 &&
+    git reset --keep HEAD^ &&
+    grep 4 file2 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse initial)" &&
+    test -z "$(git diff --cached)"
+'
+
+test_expect_success 'reset --keep keeps changes when switching back' '
+    git reset --keep second &&
+    grep 4 file2 &&
+    grep 4 file1 &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
+    test -z "$(git diff --cached)"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     A       B     B    C     --merge  (disallowed)
+test_expect_success 'reset --merge fails with changes in file it touches' '
+    git reset --hard second &&
+    echo "line 5" >> file1 &&
+    test_tick &&
+    git commit -m "add line 5" file1 &&
+    sed -e "s/line 1/changed line 1/" <file1 >file3 &&
+    mv file3 file1 &&
+    test_must_fail git reset --merge HEAD^ 2>err.log &&
+    grep file1 err.log | grep "not uptodate"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     A       B     B    C     --keep   (disallowed)
+test_expect_success 'reset --keep fails with changes in file it touches' '
+    git reset --hard second &&
+    echo "line 5" >> file1 &&
+    test_tick &&
+    git commit -m "add line 5" file1 &&
+    sed -e "s/line 1/changed line 1/" <file1 >file3 &&
+    mv file3 file1 &&
+    test_must_fail git reset --keep HEAD^ 2>err.log &&
+    grep file1 err.log | grep "not uptodate"
+'
+
+test_expect_success 'setup 3 different branches' '
+    git reset --hard second &&
+    git branch branch1 &&
+    git branch branch2 &&
+    git branch branch3 &&
+    git checkout branch1 &&
+    echo "line 5 in branch1" >> file1 &&
+    test_tick &&
+    git commit -a -m "change in branch1" &&
+    git checkout branch2 &&
+    echo "line 5 in branch2" >> file1 &&
+    test_tick &&
+    git commit -a -m "change in branch2" &&
+    git tag third &&
+    git checkout branch3 &&
+    echo a new file >file3 &&
+    rm -f file1 &&
+    git add file3 &&
+    test_tick &&
+    git commit -a -m "change in branch3"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     X       U     B    C     --merge  C       C     C
+test_expect_success '"reset --merge HEAD^" is ok with pending merge' '
+    git checkout third &&
+    test_must_fail git merge branch1 &&
+    git reset --merge HEAD^ &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse second)" &&
+    test -z "$(git diff --cached)" &&
+    test -z "$(git diff)"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     X       U     B    C     --keep   (disallowed)
+test_expect_success '"reset --keep HEAD^" fails with pending merge' '
+    git reset --hard third &&
+    test_must_fail git merge branch1 &&
+    test_must_fail git reset --keep HEAD^ 2>err.log &&
+    test_i18ngrep "middle of a merge" err.log
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     X       U     B    B     --merge  B       B     B
+test_expect_success '"reset --merge HEAD" is ok with pending merge' '
+    git reset --hard third &&
+    test_must_fail git merge branch1 &&
+    git reset --merge HEAD &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse third)" &&
+    test -z "$(git diff --cached)" &&
+    test -z "$(git diff)"
+'
+
+# The next test will test the following:
+#
+#           working index HEAD target         working index HEAD
+#           ----------------------------------------------------
+# file1:     X       U     B    B     --keep   (disallowed)
+test_expect_success '"reset --keep HEAD" fails with pending merge' '
+    git reset --hard third &&
+    test_must_fail git merge branch1 &&
+    test_must_fail git reset --keep HEAD 2>err.log &&
+    test_i18ngrep "middle of a merge" err.log
+'
+
+test_expect_success '--merge is ok with added/deleted merge' '
+    git reset --hard third &&
+    rm -f file2 &&
+    test_must_fail git merge branch3 &&
+    ! test -f file2 &&
+    test -f file3 &&
+    git diff --exit-code file3 &&
+    git diff --exit-code branch3 file3 &&
+    git reset --merge HEAD &&
+    ! test -f file3 &&
+    ! test -f file2 &&
+    git diff --exit-code --cached
+'
+
+test_expect_success '--keep fails with added/deleted merge' '
+    git reset --hard third &&
+    rm -f file2 &&
+    test_must_fail git merge branch3 &&
+    ! test -f file2 &&
+    test -f file3 &&
+    git diff --exit-code file3 &&
+    git diff --exit-code branch3 file3 &&
+    test_must_fail git reset --keep HEAD 2>err.log &&
+    test_i18ngrep "middle of a merge" err.log
+'
+
+test_done