tvl-depot/third_party/git/t/t6012-rev-list-simplify.sh
Vincent Ambo f4609b896f merge(3p/git): Merge git subtree at v2.29.2
This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb
2020-11-21 19:45:56 +01:00

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#!/bin/sh
test_description='merge simplification'
. ./test-lib.sh
note () {
git tag "$1"
}
unnote () {
git name-rev --tags --stdin | sed -e "s|$OID_REGEX (tags/\([^)]*\)) |\1 |g"
}
#
# Create a test repo with interesting commit graph:
#
# A--B----------G--H--I--K--L
# \ \ / /
# \ \ / /
# C------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 master &&
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" master &&
>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 master &&
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 master &&
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 |
unnote >actual &&
sed -e "s/^.* \([^ ]*\) .*/\1/" >check <actual &&
test_cmp expect check
'
}
check_result () {
check_outcome success "$@"
}
check_result 'L K J I H F E D C G B A' --full-history --topo-order
check_result 'L K I H G F E D C B J A' --full-history
check_result 'L K I H G F E D C B J A' --full-history --date-order
check_result 'L K I H G F E D B C J A' --full-history --author-date-order
check_result 'K I H E C B A' --full-history -- file
check_result 'K I H E C B A' --full-history --topo-order -- file
check_result 'K I H E C B A' --full-history --date-order -- file
check_result 'K I H E B C A' --full-history --author-date-order -- file
check_result 'I E C B A' --simplify-merges -- file
check_result 'I E C B A' --simplify-merges --topo-order -- file
check_result 'I E C B A' --simplify-merges --date-order -- file
check_result 'I E B C A' --simplify-merges --author-date-order -- file
check_result 'I B A' -- file
check_result 'I B A' --topo-order -- file
check_result 'I B A' --date-order -- file
check_result 'I B A' --author-date-order -- file
check_result 'H' --first-parent -- another-file
check_result 'H' --first-parent --topo-order -- another-file
check_result 'E C B A' --full-history E -- lost
test_expect_success 'full history simplification without parent' '
printf "%s\n" E C B A >expect &&
git log --pretty="$FMT" --full-history E -- lost |
unnote >actual &&
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 '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