peel_ref: do not return a null sha1

diff --git a/advice.c b/advice.c
index 961a4f5e4156dbf675f039f93eb369bb6b0cfa7a..edfbd4a6fb01a6905671d6d842d22c4869fad729 100644 (file)
--- a/advice.c
+++ b/advice.c
@@ -1,6 +1,9 @@
 #include "cache.h"
 
 int advice_push_nonfastforward = 1;
+int advice_push_non_ff_current = 1;
+int advice_push_non_ff_default = 1;
+int advice_push_non_ff_matching = 1;
 int advice_status_hints = 1;
 int advice_commit_before_merge = 1;
 int advice_resolve_conflict = 1;
@@ -12,6 +15,9 @@ static struct {
        int *preference;
 } advice_config[] = {
        { "pushnonfastforward", &advice_push_nonfastforward },
+       { "pushnonffcurrent", &advice_push_non_ff_current },
+       { "pushnonffdefault", &advice_push_non_ff_default },
+       { "pushnonffmatching", &advice_push_non_ff_matching },
        { "statushints", &advice_status_hints },
        { "commitbeforemerge", &advice_commit_before_merge },
        { "resolveconflict", &advice_resolve_conflict },
@@ -73,3 +79,17 @@ void NORETURN die_resolve_conflict(const char *me)
        error_resolve_conflict(me);
        die("Exiting because of an unresolved conflict.");
 }
+
+void detach_advice(const char *new_name)
+{
+       const char fmt[] =
+       "Note: checking out '%s'.\n\n"
+       "You are in 'detached HEAD' state. You can look around, make experimental\n"
+       "changes and commit them, and you can discard any commits you make in this\n"
+       "state without impacting any branches by performing another checkout.\n\n"
+       "If you want to create a new branch to retain commits you create, you may\n"
+       "do so (now or later) by using -b with the checkout command again. Example:\n\n"
+       "  git checkout -b new_branch_name\n\n";
+
+       fprintf(stderr, fmt, new_name);
+}