git/t/t2020-checkout-detach.sh

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#!/bin/sh
test_description='checkout into detached HEAD state'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
tests: mark tests relying on the current default for `init.defaultBranch` In addition to the manual adjustment to let the `linux-gcc` CI job run the test suite with `master` and then with `main`, this patch makes sure that GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME is set in all test scripts that currently rely on the initial branch name being `master by default. To determine which test scripts to mark up, the first step was to force-set the default branch name to `master` in - all test scripts that contain the keyword `master`, - t4211, which expects `t/t4211/history.export` with a hard-coded ref to initialize the default branch, - t5560 because it sources `t/t556x_common` which uses `master`, - t8002 and t8012 because both source `t/annotate-tests.sh` which also uses `master`) This trick was performed by this command: $ sed -i '/^ *\. \.\/\(test-lib\|lib-\(bash\|cvs\|git-svn\)\|gitweb-lib\)\.sh$/i\ GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\ ' $(git grep -l master t/t[0-9]*.sh) \ t/t4211*.sh t/t5560*.sh t/t8002*.sh t/t8012*.sh After that, careful, manual inspection revealed that some of the test scripts containing the needle `master` do not actually rely on a specific default branch name: either they mention `master` only in a comment, or they initialize that branch specificially, or they do not actually refer to the current default branch. Therefore, the aforementioned modification was undone in those test scripts thusly: $ git checkout HEAD -- \ t/t0027-auto-crlf.sh t/t0060-path-utils.sh \ t/t1011-read-tree-sparse-checkout.sh \ t/t1305-config-include.sh t/t1309-early-config.sh \ t/t1402-check-ref-format.sh t/t1450-fsck.sh \ t/t2024-checkout-dwim.sh \ t/t2106-update-index-assume-unchanged.sh \ t/t3040-subprojects-basic.sh t/t3301-notes.sh \ t/t3308-notes-merge.sh t/t3423-rebase-reword.sh \ t/t3436-rebase-more-options.sh \ t/t4015-diff-whitespace.sh t/t4257-am-interactive.sh \ t/t5323-pack-redundant.sh t/t5401-update-hooks.sh \ t/t5511-refspec.sh t/t5526-fetch-submodules.sh \ t/t5529-push-errors.sh t/t5530-upload-pack-error.sh \ t/t5548-push-porcelain.sh \ t/t5552-skipping-fetch-negotiator.sh \ t/t5572-pull-submodule.sh t/t5608-clone-2gb.sh \ t/t5614-clone-submodules-shallow.sh \ t/t7508-status.sh t/t7606-merge-custom.sh \ t/t9302-fast-import-unpack-limit.sh We excluded one set of test scripts in these commands, though: the range of `git p4` tests. The reason? `git p4` stores the (foreign) remote branch in the branch called `p4/master`, which is obviously not the default branch. Manual analysis revealed that only five of these tests actually require a specific default branch name to pass; They were modified thusly: $ sed -i '/^ *\. \.\/lib-git-p4\.sh$/i\ GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\ ' t/t980[0167]*.sh t/t9811*.sh Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-18 23:44:19 +00:00
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
check_detached () {
test_must_fail git symbolic-ref -q HEAD >/dev/null
}
check_not_detached () {
git symbolic-ref -q HEAD >/dev/null
}
PREV_HEAD_DESC='Previous HEAD position was'
check_orphan_warning() {
test_i18ngrep "you are leaving $2 behind" "$1" &&
test_i18ngrep ! "$PREV_HEAD_DESC" "$1"
}
check_no_orphan_warning() {
test_i18ngrep ! "you are leaving .* commit.*behind" "$1" &&
test_i18ngrep "$PREV_HEAD_DESC" "$1"
}
reset () {
git checkout main &&
check_not_detached
}
test_expect_success 'setup' '
test_commit one &&
test_commit two &&
test_commit three && git tag -d three &&
test_commit four && git tag -d four &&
git branch branch &&
git tag tag
'
test_expect_success 'checkout branch does not detach' '
reset &&
git checkout branch &&
check_not_detached
'
test_expect_success 'checkout tag detaches' '
reset &&
git checkout tag &&
check_detached
'
test_expect_success 'checkout branch by full name detaches' '
reset &&
git checkout refs/heads/branch &&
check_detached
'
test_expect_success 'checkout non-ref detaches' '
reset &&
git checkout branch^ &&
check_detached
'
test_expect_success 'checkout ref^0 detaches' '
reset &&
git checkout branch^0 &&
check_detached
'
test_expect_success 'checkout --detach detaches' '
reset &&
git checkout --detach branch &&
check_detached
'
test_expect_success 'checkout --detach without branch name' '
reset &&
git checkout --detach &&
check_detached
'
test_expect_success 'checkout --detach errors out for non-commit' '
reset &&
test_must_fail git checkout --detach one^{tree} &&
check_not_detached
'
test_expect_success 'checkout --detach errors out for extra argument' '
reset &&
git checkout main &&
test_must_fail git checkout --detach tag one.t &&
check_not_detached
'
test_expect_success 'checkout --detached and -b are incompatible' '
reset &&
test_must_fail git checkout --detach -b newbranch tag &&
check_not_detached
'
test_expect_success 'checkout --detach moves HEAD' '
reset &&
git checkout one &&
git checkout --detach two &&
git diff --exit-code HEAD &&
git diff --exit-code two
'
test_expect_success 'checkout warns on orphan commits' '
reset &&
git checkout --detach two &&
echo content >orphan &&
git add orphan &&
git commit -a -m orphan1 &&
echo new content >orphan &&
git commit -a -m orphan2 &&
orphan2=$(git rev-parse HEAD) &&
git checkout main 2>stderr
'
test_expect_success 'checkout warns on orphan commits: output' '
check_orphan_warning stderr "2 commits"
'
test_expect_success 'checkout warns orphaning 1 of 2 commits' '
git checkout "$orphan2" &&
git checkout HEAD^ 2>stderr
'
test_expect_success 'checkout warns orphaning 1 of 2 commits: output' '
check_orphan_warning stderr "1 commit"
'
test_expect_success 'checkout does not warn leaving ref tip' '
reset &&
git checkout --detach two &&
git checkout main 2>stderr
'
test_expect_success 'checkout does not warn leaving ref tip' '
check_no_orphan_warning stderr
'
test_expect_success 'checkout does not warn leaving reachable commit' '
reset &&
git checkout --detach HEAD^ &&
git checkout main 2>stderr
'
test_expect_success 'checkout does not warn leaving reachable commit' '
check_no_orphan_warning stderr
'
cat >expect <<'EOF'
Your branch is behind 'main' by 1 commit, and can be fast-forwarded.
(use "git pull" to update your local branch)
EOF
test_expect_success 'tracking count is accurate after orphan check' '
reset &&
git branch child main^ &&
git config branch.child.remote . &&
git config branch.child.merge refs/heads/main &&
git checkout child^ &&
git checkout child >stdout &&
test_cmp expect stdout
'
test_expect_success 'no advice given for explicit detached head state' '
# baseline
test_config advice.detachedHead true &&
git checkout child && git checkout HEAD^0 >expect.advice 2>&1 &&
test_config advice.detachedHead false &&
git checkout child && git checkout HEAD^0 >expect.no-advice 2>&1 &&
test_unconfig advice.detachedHead &&
# without configuration, the advice.* variables default to true
git checkout child && git checkout HEAD^0 >actual 2>&1 &&
test_cmp expect.advice actual &&
# with explicit --detach
# no configuration
test_unconfig advice.detachedHead &&
git checkout child && git checkout --detach HEAD^0 >actual 2>&1 &&
test_cmp expect.no-advice actual &&
# explicitly decline advice
test_config advice.detachedHead false &&
git checkout child && git checkout --detach HEAD^0 >actual 2>&1 &&
test_cmp expect.no-advice actual
'
# Detached HEAD tests for GIT_PRINT_SHA1_ELLIPSIS (new format)
test_expect_success 'describe_detached_head prints no SHA-1 ellipsis when not asked to' "
commit=$(git rev-parse --short=12 main^) &&
commit2=$(git rev-parse --short=12 main~2) &&
commit3=$(git rev-parse --short=12 main~3) &&
# The first detach operation is more chatty than the following ones.
cat >1st_detach <<-EOF &&
Note: switching to 'HEAD^'.
You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.
If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:
git switch -c <new-branch-name>
Or undo this operation with:
git switch -
Turn off this advice by setting config variable advice.detachedHead to false
HEAD is now at \$commit three
EOF
# The remaining ones just show info about previous and current HEADs.
cat >2nd_detach <<-EOF &&
Previous HEAD position was \$commit three
HEAD is now at \$commit2 two
EOF
cat >3rd_detach <<-EOF &&
Previous HEAD position was \$commit2 two
HEAD is now at \$commit3 one
EOF
reset &&
check_not_detached &&
# Various ways of *not* asking for ellipses
sane_unset GIT_PRINT_SHA1_ELLIPSIS &&
git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 1st_detach actual &&
GIT_PRINT_SHA1_ELLIPSIS="no" git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 2nd_detach actual &&
GIT_PRINT_SHA1_ELLIPSIS= git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 3rd_detach actual &&
sane_unset GIT_PRINT_SHA1_ELLIPSIS &&
# We only have four commits, but we can re-use them
reset &&
check_not_detached &&
# Make no mention of the env var at all
git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 1st_detach actual &&
GIT_PRINT_SHA1_ELLIPSIS='nope' &&
git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 2nd_detach actual &&
GIT_PRINT_SHA1_ELLIPSIS=nein &&
git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 3rd_detach actual &&
true
"
# Detached HEAD tests for GIT_PRINT_SHA1_ELLIPSIS (old format)
test_expect_success 'describe_detached_head does print SHA-1 ellipsis when asked to' "
commit=$(git rev-parse --short=12 main^) &&
commit2=$(git rev-parse --short=12 main~2) &&
commit3=$(git rev-parse --short=12 main~3) &&
# The first detach operation is more chatty than the following ones.
cat >1st_detach <<-EOF &&
Note: switching to 'HEAD^'.
You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.
If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:
git switch -c <new-branch-name>
Or undo this operation with:
git switch -
Turn off this advice by setting config variable advice.detachedHead to false
HEAD is now at \$commit... three
EOF
# The remaining ones just show info about previous and current HEADs.
cat >2nd_detach <<-EOF &&
Previous HEAD position was \$commit... three
HEAD is now at \$commit2... two
EOF
cat >3rd_detach <<-EOF &&
Previous HEAD position was \$commit2... two
HEAD is now at \$commit3... one
EOF
reset &&
check_not_detached &&
# Various ways of asking for ellipses...
# The user can just use any kind of quoting (including none).
GIT_PRINT_SHA1_ELLIPSIS=yes git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 1st_detach actual &&
GIT_PRINT_SHA1_ELLIPSIS=Yes git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 2nd_detach actual &&
GIT_PRINT_SHA1_ELLIPSIS=YES git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
check_detached &&
test_cmp 3rd_detach actual &&
true
"
test_done