git/t/t6012-rev-list-simplify.sh

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#!/bin/sh
test_description='merge simplification'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
note () {
git tag "$1"
}
unnote () {
test_when_finished "rm -f tmp" &&
git name-rev --tags --annotate-stdin >tmp &&
sed -e "s|$OID_REGEX (tags/\([^)]*\)) |\1 |g" <tmp
}
#
# Create a test repo with an interesting commit graph:
#
# A-----B-----G--H--I--K--L
# \ \ / /
# \ \ / /
# C--D--E--F J
#
# The commits are laid out from left-to-right starting with
# the root commit A and terminating at the tip commit L.
#
# There are a few places where we adjust the commit date or
# author date to make the --topo-order, --date-order, and
# --author-date-order flags produce different output.
test_expect_success setup '
echo "Hi there" >file &&
echo "initial" >lost &&
git add file lost &&
test_tick && git commit -m "Initial file and lost" &&
note A &&
git branch other-branch &&
git symbolic-ref HEAD refs/heads/unrelated &&
git rm -f "*" &&
echo "Unrelated branch" >side &&
git add side &&
test_tick && git commit -m "Side root" &&
note J &&
git checkout main &&
echo "Hello" >file &&
echo "second" >lost &&
git add file lost &&
test_tick && GIT_AUTHOR_DATE=$(($test_tick + 120)) git commit -m "Modified file and lost" &&
note B &&
git checkout other-branch &&
echo "Hello" >file &&
>lost &&
git add file lost &&
test_tick && git commit -m "Modified the file identically" &&
note C &&
echo "This is a stupid example" >another-file &&
git add another-file &&
test_tick && git commit -m "Add another file" &&
note D &&
test_tick &&
test_must_fail git merge -m "merge" main &&
>lost && git commit -a -m "merge" &&
note E &&
echo "Yet another" >elif &&
git add elif &&
test_tick && git commit -m "Irrelevant change" &&
note F &&
git checkout main &&
echo "Yet another" >elif &&
git add elif &&
test_tick && git commit -m "Another irrelevant change" &&
note G &&
test_tick && git merge -m "merge" other-branch &&
note H &&
echo "Final change" >file &&
test_tick && git commit -a -m "Final change" &&
note I &&
git checkout main &&
test_tick && git merge --allow-unrelated-histories -m "Coolest" unrelated &&
note K &&
echo "Immaterial" >elif &&
git add elif &&
test_tick && git commit -m "Last" &&
note L
'
FMT='tformat:%P %H | %s'
check_outcome () {
outcome=$1
shift
for c in $1
do
echo "$c"
done >expect &&
shift &&
param="$*" &&
test_expect_$outcome "log $param" '
git log --pretty="$FMT" --parents $param >out &&
unnote >actual <out &&
sed -e "s/^.* \([^ ]*\) .*/\1/" >check <actual &&
test_cmp expect check
'
}
check_result () {
check_outcome success "$@"
}
check_result 'L K J I H F E D C G B A' --full-history --topo-order
check_result 'L K I H G F E D C B J A' --full-history
check_result 'L K I H G F E D C B J A' --full-history --date-order
check_result 'L K I H G F E D B C J A' --full-history --author-date-order
check_result 'K I H E C B A' --full-history -- file
check_result 'K I H E C B A' --full-history --topo-order -- file
check_result 'K I H E C B A' --full-history --date-order -- file
check_result 'K I H E B C A' --full-history --author-date-order -- file
check_result 'I E C B A' --simplify-merges -- file
check_result 'I E C B A' --simplify-merges --topo-order -- file
check_result 'I E C B A' --simplify-merges --date-order -- file
check_result 'I E B C A' --simplify-merges --author-date-order -- file
check_result 'I B A' -- file
check_result 'I B A' --topo-order -- file
check_result 'I B A' --date-order -- file
check_result 'I B A' --author-date-order -- file
check_result 'H' --first-parent -- another-file
check_result 'H' --first-parent --topo-order -- another-file
check_result 'L K I H G B A' --first-parent L
check_result 'F E D C' --exclude-first-parent-only F ^L
check_result '' F ^L
check_result 'L K I H G J' L ^F
check_result 'L K I H G B J' --exclude-first-parent-only L ^F
check_result 'L K I H G B' --exclude-first-parent-only --first-parent L ^F
check_result 'E C B A' --full-history E -- lost
test_expect_success 'full history simplification without parent' '
printf "%s\n" E C B A >expect &&
git log --pretty="$FMT" --full-history E -- lost >out &&
unnote >actual <out &&
sed -e "s/^.* \([^ ]*\) .*/\1/" >check <actual &&
test_cmp expect check
'
test_expect_success '--full-diff is not affected by --parents' '
git log -p --pretty="%H" --full-diff -- file >expected &&
git log -p --pretty="%H" --full-diff --parents -- file >actual &&
test_cmp expected actual
'
#
# Create a new history to demonstrate the value of --show-pulls
# with respect to the subtleties of simplified history, --full-history,
# and --simplify-merges.
#
# .-A---M-----C--N---O---P
# / / \ \ \/ / /
# I B \ R-'`-Z' /
# \ / \/ /
# \ / /\ /
# `---X--' `---Y--'
#
# This example is explained in Documentation/rev-list-options.txt
test_expect_success 'setup rebuild repo' '
rm -rf .git * &&
git init &&
git switch -c topic &&
echo base >file &&
git add file &&
test_commit I &&
echo A >file &&
git add file &&
test_commit A &&
git switch -c branchB I &&
echo B >file &&
git add file &&
test_commit B &&
git switch topic &&
test_must_fail git merge -m "M" B &&
echo A >file &&
echo B >>file &&
git add file &&
git merge --continue &&
note M &&
echo C >other &&
git add other &&
test_commit C &&
git switch -c branchX I &&
echo X >file &&
git add file &&
test_commit X &&
git switch -c branchR M &&
git merge -m R -Xtheirs X &&
note R &&
git switch topic &&
git merge -m N R &&
note N &&
git switch -c branchY M &&
echo Y >y &&
git add y &&
test_commit Y &&
git switch -c branchZ C &&
echo Z >z &&
git add z &&
test_commit Z &&
git switch topic &&
git merge -m O Z &&
note O &&
git merge -m P Y &&
note P
'
check_result 'X I' -- file
check_result 'N R X I' --show-pulls -- file
check_result 'P O N R X M B A I' --full-history --topo-order -- file
check_result 'N R X M B A I' --simplify-merges --topo-order --show-pulls -- file
check_result 'R X M B A I' --simplify-merges --topo-order -- file
check_result 'N M A I' --first-parent -- file
check_result 'N M A I' --first-parent --show-pulls -- file
# --ancestry-path implies --full-history
check_result 'P O N R M' --topo-order \
--ancestry-path A..HEAD -- file
check_result 'P O N R M' --topo-order \
--show-pulls \
--ancestry-path A..HEAD -- file
check_result 'P O N R M' --topo-order \
--full-history \
--ancestry-path A..HEAD -- file
check_result 'R M' --topo-order \
--simplify-merges \
--ancestry-path A..HEAD -- file
check_result 'N R M' --topo-order \
--simplify-merges --show-pulls \
--ancestry-path A..HEAD -- file
test_expect_success 'log --graph --simplify-merges --show-pulls' '
cat >expect <<-\EOF &&
* N
* R
|\
| * X
* | M
|\ \
| * | B
| |/
* / A
|/
* I
EOF
git log --graph --pretty="%s" \
--simplify-merges --show-pulls \
-- file >actual &&
test_cmp expect actual
'
test_done