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git-commit-vandalism/t/t7201-co.sh
Josh Steadmon d3115660b4 branch: add flags and config to inherit tracking 
It can be helpful when creating a new branch to use the existing
tracking configuration from the branch point. However, there is
currently not a method to automatically do so.

Teach git-{branch,checkout,switch} an "inherit" argument to the
"--track" option. When this is set, creating a new branch will cause the
tracking configuration to default to the configuration of the branch
point, if set.

For example, if branch "main" tracks "origin/main", and we run
`git checkout --track=inherit -b feature main`, then branch "feature"
will track "origin/main". Thus, `git status` will show us how far
ahead/behind we are from origin, and `git pull` will pull from origin.

This is particularly useful when creating branches across many
submodules, such as with `git submodule foreach ...` (or if running with
a patch such as [1], which we use at $job), as it avoids having to
manually set tracking info for each submodule.

Since we've added an argument to "--track", also add "--track=direct" as
another way to explicitly get the original "--track" behavior ("--track"
without an argument still works as well).

Finally, teach branch.autoSetupMerge a new "inherit" option. When this
is set, "--track=inherit" becomes the default behavior.

[1]: https://lore.kernel.org/git/20180927221603.148025-1-sbeller@google.com/

Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-20 22:40:21 -08:00

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#!/bin/sh
#
# Copyright (c) 2006 Junio C Hamano
#
test_description='git checkout tests.
Creates main, forks renamer and side branches from it.
Test switching across them.
! [main] Initial A one, A two
* [renamer] Renamer R one->uno, M two
! [side] Side M one, D two, A three
! [simple] Simple D one, M two
----
+ [simple] Simple D one, M two
+ [side] Side M one, D two, A three
* [renamer] Renamer R one->uno, M two
+*++ [main] Initial A one, A two
'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
test_tick
fill () {
for i
do
echo "$i"
done
}
test_expect_success setup '
fill x y z >same &&
fill 1 2 3 4 5 6 7 8 >one &&
fill a b c d e >two &&
git add same one two &&
git commit -m "Initial A one, A two" &&
git checkout -b renamer &&
rm -f one &&
fill 1 3 4 5 6 7 8 >uno &&
git add uno &&
fill a b c d e f >two &&
git commit -a -m "Renamer R one->uno, M two" &&
git checkout -b side main &&
fill 1 2 3 4 5 6 7 >one &&
fill A B C D E >three &&
rm -f two &&
git update-index --add --remove one two three &&
git commit -m "Side M one, D two, A three" &&
git checkout -b simple main &&
rm -f one &&
fill a c e >two &&
git commit -a -m "Simple D one, M two" &&
git checkout main
'
test_expect_success 'checkout from non-existing branch' '
git checkout -b delete-me main &&
git update-ref -d --no-deref refs/heads/delete-me &&
test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
git checkout main &&
test refs/heads/main = "$(git symbolic-ref HEAD)"
'
test_expect_success 'checkout with dirty tree without -m' '
fill 0 1 2 3 4 5 6 7 8 >one &&
if git checkout side
then
echo Not happy
false
else
echo "happy - failed correctly"
fi
'
test_expect_success 'checkout with unrelated dirty tree without -m' '
git checkout -f main &&
fill 0 1 2 3 4 5 6 7 8 >same &&
cp same kept &&
git checkout side >messages &&
test_cmp same kept &&
printf "M\t%s\n" same >messages.expect &&
test_cmp messages.expect messages
'
test_expect_success 'checkout -m with dirty tree' '
git checkout -f main &&
git clean -f &&
fill 0 1 2 3 4 5 6 7 8 >one &&
git checkout -m side >messages &&
test "$(git symbolic-ref HEAD)" = "refs/heads/side" &&
printf "M\t%s\n" one >expect.messages &&
test_cmp expect.messages messages &&
fill "M one" "A three" "D two" >expect.main &&
git diff --name-status main >current.main &&
test_cmp expect.main current.main &&
fill "M one" >expect.side &&
git diff --name-status side >current.side &&
test_cmp expect.side current.side &&
git diff --cached >current.index &&
test_must_be_empty current.index
'
test_expect_success 'checkout -m with dirty tree, renamed' '
git checkout -f main && git clean -f &&
fill 1 2 3 4 5 7 8 >one &&
if git checkout renamer
then
echo Not happy
false
else
echo "happy - failed correctly"
fi &&
git checkout -m renamer &&
fill 1 3 4 5 7 8 >expect &&
test_cmp expect uno &&
! test -f one &&
git diff --cached >current &&
test_must_be_empty current
'
test_expect_success 'checkout -m with merge conflict' '
git checkout -f main && git clean -f &&
fill 1 T 3 4 5 6 S 8 >one &&
if git checkout renamer
then
echo Not happy
false
else
echo "happy - failed correctly"
fi &&
git checkout -m renamer &&
git diff main:one :3:uno |
sed -e "1,/^@@/d" -e "/^ /d" -e "s/^-/d/" -e "s/^+/a/" >current &&
fill d2 aT d7 aS >expect &&
test_cmp expect current &&
git diff --cached two >current &&
test_must_be_empty current
'
test_expect_success 'format of merge conflict from checkout -m' '
git checkout -f main &&
git clean -f &&
fill b d >two &&
git checkout -m simple &&
git ls-files >current &&
fill same two two two >expect &&
test_cmp expect current &&
cat <<-EOF >expect &&
<<<<<<< simple
a
c
e
=======
b
d
>>>>>>> local
EOF
test_cmp expect two
'
test_expect_success 'checkout --merge --conflict=diff3 <branch>' '
git checkout -f main &&
git reset --hard &&
git clean -f &&
fill b d >two &&
git checkout --merge --conflict=diff3 simple &&
cat <<-EOF >expect &&
<<<<<<< simple
a
c
e
||||||| main
a
b
c
d
e
=======
b
d
>>>>>>> local
EOF
test_cmp expect two
'
test_expect_success 'switch to another branch while carrying a deletion' '
git checkout -f main &&
git reset --hard &&
git clean -f &&
git rm two &&
test_must_fail git checkout simple 2>errs &&
test_i18ngrep overwritten errs &&
test_must_fail git read-tree --quiet -m -u HEAD simple 2>errs &&
test_must_be_empty errs
'
test_expect_success 'checkout to detach HEAD (with advice declined)' '
git config advice.detachedHead false &&
rev=$(git rev-parse --short renamer^) &&
git checkout -f renamer &&
git clean -f &&
git checkout renamer^ 2>messages &&
test_i18ngrep "HEAD is now at $rev" messages &&
test_line_count = 1 messages &&
H=$(git rev-parse --verify HEAD) &&
M=$(git show-ref -s --verify refs/heads/main) &&
test "z$H" = "z$M" &&
if git symbolic-ref HEAD >/dev/null 2>&1
then
echo "OOPS, HEAD is still symbolic???"
false
else
: happy
fi
'
test_expect_success 'checkout to detach HEAD' '
git config advice.detachedHead true &&
rev=$(git rev-parse --short renamer^) &&
git checkout -f renamer &&
git clean -f &&
git checkout renamer^ 2>messages &&
grep "HEAD is now at $rev" messages &&
test_line_count -gt 1 messages &&
H=$(git rev-parse --verify HEAD) &&
M=$(git show-ref -s --verify refs/heads/main) &&
test "z$H" = "z$M" &&
if git symbolic-ref HEAD >/dev/null 2>&1
then
echo "OOPS, HEAD is still symbolic???"
false
else
: happy
fi
'
test_expect_success 'checkout to detach HEAD with branchname^' '
git checkout -f main &&
git clean -f &&
git checkout renamer^ &&
H=$(git rev-parse --verify HEAD) &&
M=$(git show-ref -s --verify refs/heads/main) &&
test "z$H" = "z$M" &&
if git symbolic-ref HEAD >/dev/null 2>&1
then
echo "OOPS, HEAD is still symbolic???"
false
else
: happy
fi
'
test_expect_success 'checkout to detach HEAD with :/message' '
git checkout -f main &&
git clean -f &&
git checkout ":/Initial" &&
H=$(git rev-parse --verify HEAD) &&
M=$(git show-ref -s --verify refs/heads/main) &&
test "z$H" = "z$M" &&
if git symbolic-ref HEAD >/dev/null 2>&1
then
echo "OOPS, HEAD is still symbolic???"
false
else
: happy
fi
'
test_expect_success 'checkout to detach HEAD with HEAD^0' '
git checkout -f main &&
git clean -f &&
git checkout HEAD^0 &&
H=$(git rev-parse --verify HEAD) &&
M=$(git show-ref -s --verify refs/heads/main) &&
test "z$H" = "z$M" &&
if git symbolic-ref HEAD >/dev/null 2>&1
then
echo "OOPS, HEAD is still symbolic???"
false
else
: happy
fi
'
test_expect_success 'checkout with ambiguous tag/branch names' '
git tag both side &&
git branch both main &&
git reset --hard &&
git checkout main &&
git checkout both &&
H=$(git rev-parse --verify HEAD) &&
M=$(git show-ref -s --verify refs/heads/main) &&
test "z$H" = "z$M" &&
name=$(git symbolic-ref HEAD 2>/dev/null) &&
test "z$name" = zrefs/heads/both
'
test_expect_success 'checkout with ambiguous tag/branch names' '
git reset --hard &&
git checkout main &&
git tag frotz side &&
git branch frotz main &&
git reset --hard &&
git checkout main &&
git checkout tags/frotz &&
H=$(git rev-parse --verify HEAD) &&
S=$(git show-ref -s --verify refs/heads/side) &&
test "z$H" = "z$S" &&
if name=$(git symbolic-ref HEAD 2>/dev/null)
then
echo "Bad -- should have detached"
false
else
: happy
fi
'
test_expect_success 'switch branches while in subdirectory' '
git reset --hard &&
git checkout main &&
mkdir subs &&
git -C subs checkout side &&
! test -f subs/one &&
rm -fr subs
'
test_expect_success 'checkout specific path while in subdirectory' '
git reset --hard &&
git checkout side &&
mkdir subs &&
>subs/bero &&
git add subs/bero &&
git commit -m "add subs/bero" &&
git checkout main &&
mkdir -p subs &&
git -C subs checkout side -- bero &&
test -f subs/bero
'
test_expect_success 'checkout w/--track sets up tracking' '
git config branch.autosetupmerge false &&
git checkout main &&
git checkout --track -b track1 &&
test "$(git config branch.track1.remote)" &&
test "$(git config branch.track1.merge)"
'
test_expect_success 'checkout w/autosetupmerge=always sets up tracking' '
test_when_finished git config branch.autosetupmerge false &&
git config branch.autosetupmerge always &&
git checkout main &&
git checkout -b track2 &&
test "$(git config branch.track2.remote)" &&
test "$(git config branch.track2.merge)"
'
test_expect_success 'checkout w/--track from non-branch HEAD fails' '
git checkout main^0 &&
test_must_fail git symbolic-ref HEAD &&
test_must_fail git checkout --track -b track &&
test_must_fail git rev-parse --verify track &&
test_must_fail git symbolic-ref HEAD &&
test "z$(git rev-parse main^0)" = "z$(git rev-parse HEAD)"
'
test_expect_success 'checkout w/--track from tag fails' '
git checkout main^0 &&
test_must_fail git symbolic-ref HEAD &&
test_must_fail git checkout --track -b track frotz &&
test_must_fail git rev-parse --verify track &&
test_must_fail git symbolic-ref HEAD &&
test "z$(git rev-parse main^0)" = "z$(git rev-parse HEAD)"
'
test_expect_success 'detach a symbolic link HEAD' '
git checkout main &&
git config --bool core.prefersymlinkrefs yes &&
git checkout side &&
git checkout main &&
it=$(git symbolic-ref HEAD) &&
test "z$it" = zrefs/heads/main &&
here=$(git rev-parse --verify refs/heads/main) &&
git checkout side^ &&
test "z$(git rev-parse --verify refs/heads/main)" = "z$here"
'
test_expect_success 'checkout with --track fakes a sensible -b <name>' '
git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*" &&
git update-ref refs/remotes/origin/koala/bear renamer &&
git checkout --track origin/koala/bear &&
test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&
git checkout main && git branch -D koala/bear &&
git checkout --track refs/remotes/origin/koala/bear &&
test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&
git checkout main && git branch -D koala/bear &&
git checkout --track remotes/origin/koala/bear &&
test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)"
'
test_expect_success 'checkout with --track, but without -b, fails with too short tracked name' '
test_must_fail git checkout --track renamer
'
setup_conflicting_index () {
rm -f .git/index &&
O=$(echo original | git hash-object -w --stdin) &&
A=$(echo ourside | git hash-object -w --stdin) &&
B=$(echo theirside | git hash-object -w --stdin) &&
(
echo "100644 $A 0 fild" &&
echo "100644 $O 1 file" &&
echo "100644 $A 2 file" &&
echo "100644 $B 3 file" &&
echo "100644 $A 0 filf"
) | git update-index --index-info
}
test_expect_success 'checkout an unmerged path should fail' '
setup_conflicting_index &&
echo "none of the above" >sample &&
cat sample >fild &&
cat sample >file &&
cat sample >filf &&
test_must_fail git checkout fild file filf &&
test_cmp sample fild &&
test_cmp sample filf &&
test_cmp sample file
'
test_expect_success 'checkout with an unmerged path can be ignored' '
setup_conflicting_index &&
echo "none of the above" >sample &&
echo ourside >expect &&
cat sample >fild &&
cat sample >file &&
cat sample >filf &&
git checkout -f fild file filf &&
test_cmp expect fild &&
test_cmp expect filf &&
test_cmp sample file
'
test_expect_success 'checkout unmerged stage' '
setup_conflicting_index &&
echo "none of the above" >sample &&
echo ourside >expect &&
cat sample >fild &&
cat sample >file &&
cat sample >filf &&
git checkout --ours . &&
test_cmp expect fild &&
test_cmp expect filf &&
test_cmp expect file &&
git checkout --theirs file &&
test ztheirside = "z$(cat file)"
'
test_expect_success 'checkout with --merge' '
setup_conflicting_index &&
echo "none of the above" >sample &&
echo ourside >expect &&
cat sample >fild &&
cat sample >file &&
cat sample >filf &&
git checkout -m -- fild file filf &&
(
echo "<<<<<<< ours" &&
echo ourside &&
echo "=======" &&
echo theirside &&
echo ">>>>>>> theirs"
) >merged &&
test_cmp expect fild &&
test_cmp expect filf &&
test_cmp merged file
'
test_expect_success 'checkout with --merge, in diff3 -m style' '
git config merge.conflictstyle diff3 &&
setup_conflicting_index &&
echo "none of the above" >sample &&
echo ourside >expect &&
cat sample >fild &&
cat sample >file &&
cat sample >filf &&
git checkout -m -- fild file filf &&
(
echo "<<<<<<< ours" &&
echo ourside &&
echo "||||||| base" &&
echo original &&
echo "=======" &&
echo theirside &&
echo ">>>>>>> theirs"
) >merged &&
test_cmp expect fild &&
test_cmp expect filf &&
test_cmp merged file
'
test_expect_success 'checkout --conflict=merge, overriding config' '
git config merge.conflictstyle diff3 &&
setup_conflicting_index &&
echo "none of the above" >sample &&
echo ourside >expect &&
cat sample >fild &&
cat sample >file &&
cat sample >filf &&
git checkout --conflict=merge -- fild file filf &&
(
echo "<<<<<<< ours" &&
echo ourside &&
echo "=======" &&
echo theirside &&
echo ">>>>>>> theirs"
) >merged &&
test_cmp expect fild &&
test_cmp expect filf &&
test_cmp merged file
'
test_expect_success 'checkout --conflict=diff3' '
test_unconfig merge.conflictstyle &&
setup_conflicting_index &&
echo "none of the above" >sample &&
echo ourside >expect &&
cat sample >fild &&
cat sample >file &&
cat sample >filf &&
git checkout --conflict=diff3 -- fild file filf &&
(
echo "<<<<<<< ours" &&
echo ourside &&
echo "||||||| base" &&
echo original &&
echo "=======" &&
echo theirside &&
echo ">>>>>>> theirs"
) >merged &&
test_cmp expect fild &&
test_cmp expect filf &&
test_cmp merged file
'
test_expect_success 'failing checkout -b should not break working tree' '
git clean -fd && # Remove untracked files in the way
git reset --hard main &&
git symbolic-ref HEAD refs/heads/main &&
test_must_fail git checkout -b renamer side^ &&
test $(git symbolic-ref HEAD) = refs/heads/main &&
git diff --exit-code &&
git diff --cached --exit-code
'
test_expect_success 'switch out of non-branch' '
git reset --hard main &&
git checkout main^0 &&
echo modified >one &&
test_must_fail git checkout renamer 2>error.log &&
! grep "^Previous HEAD" error.log
'
(
echo "#!$SHELL_PATH"
cat <<\EOF
O=$1 A=$2 B=$3
cat "$A" >.tmp
exec >"$A"
echo '<<<<<<< filfre-theirs'
cat "$B"
echo '||||||| filfre-common'
cat "$O"
echo '======='
cat ".tmp"
echo '>>>>>>> filfre-ours'
rm -f .tmp
exit 1
EOF
) >filfre.sh
chmod +x filfre.sh
test_expect_success 'custom merge driver with checkout -m' '
git reset --hard &&
git config merge.filfre.driver "./filfre.sh %O %A %B" &&
git config merge.filfre.name "Feel-free merge driver" &&
git config merge.filfre.recursive binary &&
echo "arm merge=filfre" >.gitattributes &&
git checkout -b left &&
echo neutral >arm &&
git add arm .gitattributes &&
test_tick &&
git commit -m neutral &&
git branch right &&
echo left >arm &&
test_tick &&
git commit -a -m left &&
git checkout right &&
echo right >arm &&
test_tick &&
git commit -a -m right &&
test_must_fail git merge left &&
(
for t in filfre-common left right
do
grep $t arm || exit 1
done
) &&
mv arm expect &&
git checkout -m arm &&
test_cmp expect arm
'
test_expect_success 'tracking info copied with autoSetupMerge=inherit' '
git reset --hard main &&
# default config does not copy tracking info
git checkout -b foo-no-inherit koala/bear &&
test_cmp_config "" --default "" branch.foo-no-inherit.remote &&
test_cmp_config "" --default "" branch.foo-no-inherit.merge &&
# with autoSetupMerge=inherit, we copy tracking info from koala/bear
test_config branch.autoSetupMerge inherit &&
git checkout -b foo koala/bear &&
test_cmp_config origin branch.foo.remote &&
test_cmp_config refs/heads/koala/bear branch.foo.merge &&
# no tracking info to inherit from main
git checkout -b main2 main &&
test_cmp_config "" --default "" branch.main2.remote &&
test_cmp_config "" --default "" branch.main2.merge
'
test_done
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