checkout: do not mention detach advice for explicit --detach option

When a user asked for a detached HEAD specifically with `--detach`,
we do not need to give advice on what a detached HEAD state entails as
we can assume they know what they're getting into as they asked for it.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/checkout.c b/builtin/checkout.c
index c3486bdec364fde395cf3523b778ec4dc9c3223a..91bafdaef4295eaf5d241020a21432f58985a460 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -655,7 +655,8 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
                update_ref(msg.buf, "HEAD", new->commit->object.oid.hash, NULL,
                           REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
                if (!opts->quiet) {
-                       if (old->path && advice_detached_head)
+                       if (old->path &&
+                           advice_detached_head && !opts->force_detach)
                                detach_advice(new->name);
                        describe_detached_head(_("HEAD is now at"), new->commit);
                }

diff --git a/t/t2020-checkout-detach.sh b/t/t2020-checkout-detach.sh
index 5d68729d7a65abde09d1293e8569b730d2ba9a40..fbb4ee9bb42dbcfdfcdb79511523a8fa2ac8b5d9 100755 (executable)
--- a/t/t2020-checkout-detach.sh
+++ b/t/t2020-checkout-detach.sh
@@ -163,4 +163,27 @@ test_expect_success 'tracking count is accurate after orphan check' '
        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