mirror of
https://github.com/git/git.git
synced 2024-12-12 11:24:02 +08:00
b1f47514f2
In 456156d a shortcut to priming the index tree reference was
introduced, but the justification for it was completely bogus.
"read-tree -m A B" is to take the index (and the working tree)
that is largely based on (but does not have to match exactly) A
and update it to B, while carrying the local change that does
not overlap the difference between A and B, so there is no reason
to expect that the resulting index should match the tree B.
Noticed and test provided by Heiko Voigt.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
412 lines
12 KiB
Bash
Executable File
412 lines
12 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 nor M
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'
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. ./test-lib.sh
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read_tree_twoway () {
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git read-tree -m "$1" "$2" && git ls-files --stage
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}
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_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
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_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
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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 \
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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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test_expect_success \
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'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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echo '+100644 X 0 yomin' >expected
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test_expect_success \
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'4 - carry forward local addition.' \
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'rm -f .git/index &&
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git read-tree $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 || return 1
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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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test_expect_success \
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'5 - carry forward local addition.' \
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'rm -f .git/index &&
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git read-tree $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 || return 1
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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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test_expect_success \
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'6 - local addition already has the same.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'7 - local addition already has the same.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'8 - conflicting addition.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'9 - conflicting addition.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'10 - path removed.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'11 - dirty path removed.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'12 - unmatching local changes being removed.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'13 - unmatching local changes being removed.' \
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'rm -f .git/index &&
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git read-tree $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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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 \
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'14 - unchanged in two heads.' \
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'rm -f .git/index &&
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git read-tree $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 || return 1
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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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test_expect_success \
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'15 - unchanged in two heads.' \
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'rm -f .git/index &&
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git read-tree $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 || return 1
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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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test_expect_success \
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'16 - conflicting local change.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'17 - conflicting local change.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'18 - local change already having a good result.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'19 - local change already having a good result, further modified.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'20 - no local change, use new tree.' \
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'rm -f .git/index &&
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git read-tree $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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test_expect_success \
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'21 - no local change, dirty cache.' \
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'rm -f .git/index &&
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git read-tree $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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# This fails with straight two-way fast forward.
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test_expect_success \
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'22 - local change cache updated.' \
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'rm -f .git/index &&
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git read-tree $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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# Also make sure we did not break DF vs DF/DF case.
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test_expect_success \
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'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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test_expect_success \
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'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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test_expect_success \
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'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 $treeH'
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test_expect_success \
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'a/b (untracked) vs a, plus c/d case test.' \
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'! git read-tree -u -m "$treeH" "$treeM" &&
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git ls-files --stage &&
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test -f a/b'
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test_expect_success \
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'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 $treeH'
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test_expect_success \
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'a/b vs a, plus c/d case test.' \
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'git read-tree -u -m "$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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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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git read-tree -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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