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https://github.com/git/git
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3d415425c7
In the future we want to support working tree operations within submodules,
e.g. "git checkout --recurse-submodules", which will update the submodule
to the commit as recorded in its superproject. In the submodule the
unpack-tree operation is carried out as usual, but the reporting to the
user needs to prefix any path with the superproject. The mechanism for
this is the super-prefix. (see 74866d757, git: make super-prefix option)
Add support for the super-prefix option for commands that unpack trees
by wrapping any path output in unpacking trees in the newly introduced
super_prefixed function. This new function prefixes any path with the
super-prefix if there is one. Assuming the submodule case doesn't happen
in the majority of the cases, we'd want to have a fast behavior for no
super prefix, i.e. no reallocation/copying, but just returning path.
Another aspect of introducing the `super_prefixed` function is to consider
who owns the memory and if this is the right place where the path gets
modified. As the super prefix ought to change the output behavior only and
not the actual unpack tree part, it is fine to be that late in the line.
As we get passed in 'const char *path', we cannot change the path itself,
which means in case of a super prefix we have to copy over the path.
We need two static buffers in that function as the error messages
contain at most two paths.
For testing purposes enable it in read-tree, which has no output
of paths other than an unpack-trees.c. These are all converted in
this patch.
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
418 lines
11 KiB
Bash
Executable file
418 lines
11 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano
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#
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test_description='Two way merge with read-tree -m $H $M
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This test tries two-way merge (aka fast-forward with carry forward).
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There is the head (called H) and another commit (called M), which is
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simply ahead of H. The index and the work tree contains a state that
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is derived from H, but may also have local changes. This test checks
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all the combinations described in the two-tree merge "carry forward"
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rules, found in <Documentation/git read-tree.txt>.
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In the test, these paths are used:
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bozbar - in H, stays in M, modified from bozbar to gnusto
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frotz - not in H added in M
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nitfol - in H, stays in M unmodified
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rezrov - in H, deleted in M
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yomin - not in H or M
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'
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/lib-read-tree.sh
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read_tree_twoway () {
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git read-tree -m "$1" "$2" && git ls-files --stage
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}
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compare_change () {
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sed -n >current \
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-e '/^--- /d; /^+++ /d; /^@@ /d;' \
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-e 's/^\([-+][0-7][0-7][0-7][0-7][0-7][0-7]\) '"$_x40"' /\1 X /p' \
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"$1"
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test_cmp expected current
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}
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check_cache_at () {
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clean_if_empty=$(git diff-files -- "$1")
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case "$clean_if_empty" in
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'') echo "$1: clean" ;;
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?*) echo "$1: dirty" ;;
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esac
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case "$2,$clean_if_empty" in
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clean,) : ;;
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clean,?*) false ;;
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dirty,) false ;;
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dirty,?*) : ;;
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esac
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}
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cat >bozbar-old <<\EOF
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This is a sample file used in two-way fast-forward merge
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tests. Its second line ends with a magic word bozbar
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which will be modified by the merged head to gnusto.
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It has some extra lines so that external tools can
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successfully merge independent changes made to later
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lines (such as this one), avoiding line conflicts.
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EOF
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sed -e 's/bozbar/gnusto (earlier bozbar)/' bozbar-old >bozbar-new
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test_expect_success 'setup' '
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echo frotz >frotz &&
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echo nitfol >nitfol &&
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cat bozbar-old >bozbar &&
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echo rezrov >rezrov &&
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echo yomin >yomin &&
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git update-index --add nitfol bozbar rezrov &&
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treeH=$(git write-tree) &&
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echo treeH $treeH &&
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git ls-tree $treeH &&
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cat bozbar-new >bozbar &&
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git update-index --add frotz bozbar --force-remove rezrov &&
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git ls-files --stage >M.out &&
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treeM=$(git write-tree) &&
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echo treeM $treeM &&
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git ls-tree $treeM &&
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git diff-tree $treeH $treeM
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'
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test_expect_success '1, 2, 3 - no carry forward' '
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rm -f .git/index &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >1-3.out &&
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test_cmp M.out 1-3.out &&
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check_cache_at bozbar dirty &&
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check_cache_at frotz dirty &&
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check_cache_at nitfol dirty
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'
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echo '+100644 X 0 yomin' >expected
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test_expect_success '4 - carry forward local addition.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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git update-index --add yomin &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >4.out &&
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test_must_fail git diff --no-index M.out 4.out >4diff.out &&
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compare_change 4diff.out expected &&
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check_cache_at yomin clean
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'
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test_expect_success '5 - carry forward local addition.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo yomin >yomin &&
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git update-index --add yomin &&
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echo yomin yomin >yomin &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >5.out &&
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test_must_fail git diff --no-index M.out 5.out >5diff.out &&
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compare_change 5diff.out expected &&
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check_cache_at yomin dirty
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'
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test_expect_success '6 - local addition already has the same.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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git update-index --add frotz &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >6.out &&
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test_cmp M.out 6.out &&
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check_cache_at frotz clean
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'
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test_expect_success '7 - local addition already has the same.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo frotz >frotz &&
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git update-index --add frotz &&
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echo frotz frotz >frotz &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >7.out &&
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test_cmp M.out 7.out &&
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check_cache_at frotz dirty
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'
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test_expect_success '8 - conflicting addition.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo frotz frotz >frotz &&
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git update-index --add frotz &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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test_expect_success '9 - conflicting addition.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo frotz frotz >frotz &&
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git update-index --add frotz &&
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echo frotz >frotz &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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test_expect_success '10 - path removed.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo rezrov >rezrov &&
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git update-index --add rezrov &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >10.out &&
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test_cmp M.out 10.out
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'
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test_expect_success '11 - dirty path removed.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo rezrov >rezrov &&
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git update-index --add rezrov &&
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echo rezrov rezrov >rezrov &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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test_expect_success '12 - unmatching local changes being removed.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo rezrov rezrov >rezrov &&
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git update-index --add rezrov &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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test_expect_success '13 - unmatching local changes being removed.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo rezrov rezrov >rezrov &&
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git update-index --add rezrov &&
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echo rezrov >rezrov &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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cat >expected <<EOF
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-100644 X 0 nitfol
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+100644 X 0 nitfol
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EOF
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test_expect_success '14 - unchanged in two heads.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo nitfol nitfol >nitfol &&
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git update-index --add nitfol &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >14.out &&
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test_must_fail git diff --no-index M.out 14.out >14diff.out &&
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compare_change 14diff.out expected &&
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check_cache_at nitfol clean
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'
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test_expect_success '15 - unchanged in two heads.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo nitfol nitfol >nitfol &&
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git update-index --add nitfol &&
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echo nitfol nitfol nitfol >nitfol &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >15.out &&
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test_must_fail git diff --no-index M.out 15.out >15diff.out &&
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compare_change 15diff.out expected &&
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check_cache_at nitfol dirty
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'
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test_expect_success '16 - conflicting local change.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo bozbar bozbar >bozbar &&
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git update-index --add bozbar &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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test_expect_success '17 - conflicting local change.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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echo bozbar bozbar >bozbar &&
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git update-index --add bozbar &&
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echo bozbar bozbar bozbar >bozbar &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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test_expect_success '18 - local change already having a good result.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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cat bozbar-new >bozbar &&
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git update-index --add bozbar &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >18.out &&
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test_cmp M.out 18.out &&
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check_cache_at bozbar clean
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'
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test_expect_success '19 - local change already having a good result, further modified.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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cat bozbar-new >bozbar &&
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git update-index --add bozbar &&
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echo gnusto gnusto >bozbar &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >19.out &&
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test_cmp M.out 19.out &&
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check_cache_at bozbar dirty
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'
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test_expect_success '20 - no local change, use new tree.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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cat bozbar-old >bozbar &&
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git update-index --add bozbar &&
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read_tree_twoway $treeH $treeM &&
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git ls-files --stage >20.out &&
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test_cmp M.out 20.out &&
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check_cache_at bozbar dirty
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'
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test_expect_success '21 - no local change, dirty cache.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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cat bozbar-old >bozbar &&
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git update-index --add bozbar &&
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echo gnusto gnusto >bozbar &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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# This fails with straight two-way fast-forward.
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test_expect_success '22 - local change cache updated.' '
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rm -f .git/index &&
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read_tree_must_succeed $treeH &&
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git checkout-index -u -f -q -a &&
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sed -e "s/such as/SUCH AS/" bozbar-old >bozbar &&
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git update-index --add bozbar &&
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if read_tree_twoway $treeH $treeM; then false; else :; fi
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'
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# Also make sure we did not break DF vs DF/DF case.
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test_expect_success 'DF vs DF/DF case setup.' '
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rm -f .git/index &&
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echo DF >DF &&
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git update-index --add DF &&
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treeDF=$(git write-tree) &&
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echo treeDF $treeDF &&
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git ls-tree $treeDF &&
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rm -f DF &&
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mkdir DF &&
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echo DF/DF >DF/DF &&
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git update-index --add --remove DF DF/DF &&
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treeDFDF=$(git write-tree) &&
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echo treeDFDF $treeDFDF &&
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git ls-tree $treeDFDF &&
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git ls-files --stage >DFDF.out
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'
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test_expect_success 'DF vs DF/DF case test.' '
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rm -f .git/index &&
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rm -fr DF &&
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echo DF >DF &&
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git update-index --add DF &&
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read_tree_twoway $treeDF $treeDFDF &&
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git ls-files --stage >DFDFcheck.out &&
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test_cmp DFDF.out DFDFcheck.out &&
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check_cache_at DF/DF dirty &&
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:
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'
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test_expect_success 'a/b (untracked) vs a case setup.' '
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rm -f .git/index &&
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: >a &&
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git update-index --add a &&
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treeM=$(git write-tree) &&
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echo treeM $treeM &&
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git ls-tree $treeM &&
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git ls-files --stage >treeM.out &&
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rm -f a &&
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git update-index --remove a &&
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mkdir a &&
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: >a/b &&
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treeH=$(git write-tree) &&
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echo treeH $treeH &&
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git ls-tree $treeH
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'
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test_expect_success 'a/b (untracked) vs a, plus c/d case test.' '
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read_tree_u_must_fail -u -m "$treeH" "$treeM" &&
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git ls-files --stage &&
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test -f a/b
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'
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test_expect_success 'read-tree supports the super-prefix' '
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cat <<-EOF >expect &&
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error: Updating '\''fictional/a'\'' would lose untracked files in it
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EOF
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test_must_fail git --super-prefix fictional/ read-tree -u -m "$treeH" "$treeM" 2>actual &&
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test_cmp expect actual
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'
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test_expect_success 'a/b vs a, plus c/d case setup.' '
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rm -f .git/index &&
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rm -fr a &&
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: >a &&
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mkdir c &&
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: >c/d &&
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git update-index --add a c/d &&
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treeM=$(git write-tree) &&
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echo treeM $treeM &&
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git ls-tree $treeM &&
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git ls-files --stage >treeM.out &&
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rm -f a &&
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mkdir a &&
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: >a/b &&
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git update-index --add --remove a a/b &&
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treeH=$(git write-tree) &&
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echo treeH $treeH &&
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git ls-tree $treeH
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'
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test_expect_success 'a/b vs a, plus c/d case test.' '
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read_tree_u_must_succeed -u -m "$treeH" "$treeM" &&
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git ls-files --stage | tee >treeMcheck.out &&
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test_cmp treeM.out treeMcheck.out
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'
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test_expect_success '-m references the correct modified tree' '
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echo >file-a &&
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echo >file-b &&
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git add file-a file-b &&
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git commit -a -m "test for correct modified tree" &&
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git branch initial-mod &&
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echo b >file-b &&
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git commit -a -m "B" &&
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echo a >file-a &&
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git add file-a &&
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git ls-tree $(git write-tree) file-a >expect &&
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read_tree_must_succeed -m HEAD initial-mod &&
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git ls-tree $(git write-tree) file-a >actual &&
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test_cmp expect actual
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'
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test_done
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