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" "$1"
+}
+
reset () {
git checkout master &&
check_not_detached
test_expect_success 'setup' '
test_commit one &&
test_commit two &&
+ test_commit three && git tag -d three &&
+ test_commit four && git tag -d four &&
git branch branch &&
git tag tag
'
git diff --exit-code two
'
+test_expect_success 'checkout warns on orphan commits' '
+ reset &&
+ git checkout --detach two &&
+ echo content >orphan &&
+ git add orphan &&
+ git commit -a -m orphan1 &&
+ echo new content >orphan &&
+ git commit -a -m orphan2 &&
+ orphan2=$(git rev-parse HEAD) &&
+ git checkout master 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 master 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 master 2>stderr
+'
+
+test_expect_success 'checkout does not warn leaving reachable commit' '
+ check_no_orphan_warning stderr
+'
+
+cat >expect <<'EOF'
+Your branch is behind 'master' 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 master^ &&
+ git config branch.child.remote . &&
+ git config branch.child.merge refs/heads/master &&
+ git checkout child^ &&
+ git checkout child >stdout &&
+ test_i18ncmp 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
+'
+
test_done