t/Makefile: retain cache t/.prove across prove runs

diff --git a/advice.c b/advice.c
index 0be4b5f008e1646946ba12fa5e51aa0830911ece..01130e54e7b270df7f535fb815dba25ddb72ec1a 100644 (file)
--- a/advice.c
+++ b/advice.c
@@ -19,6 +19,25 @@ static struct {
        { "detachedhead", &advice_detached_head },
 };
 
+void advise(const char *advice, ...)
+{
+       struct strbuf buf = STRBUF_INIT;
+       va_list params;
+       const char *cp, *np;
+
+       va_start(params, advice);
+       strbuf_addf(&buf, advice, params);
+       va_end(params);
+
+       for (cp = buf.buf; *cp; cp = np) {
+               np = strchrnul(cp, '\n');
+               fprintf(stderr, _("hint: %.*s\n"), (int)(np - cp), cp);
+               if (*np)
+                       np++;
+       }
+       strbuf_release(&buf);
+}
+
 int git_default_advice_config(const char *var, const char *value)
 {
        const char *k = skip_prefix(var, "advice.");
@@ -34,16 +53,37 @@ int git_default_advice_config(const char *var, const char *value)
        return 0;
 }
 
-void NORETURN die_resolve_conflict(const char *me)
+int error_resolve_conflict(const char *me)
 {
+       error("'%s' is not possible because you have unmerged files.", me);
        if (advice_resolve_conflict)
                /*
                 * Message used both when 'git commit' fails and when
                 * other commands doing a merge do.
                 */
-               die("'%s' is not possible because you have unmerged files.\n"
-                   "Please, fix them up in the work tree, and then use 'git add/rm <file>' as\n"
-                   "appropriate to mark resolution and make a commit, or use 'git commit -a'.", me);
-       else
-               die("'%s' is not possible because you have unmerged files.", me);
+               advise(_("Fix them up in the work tree,\n"
+                        "and then use 'git add/rm <file>' as\n"
+                        "appropriate to mark resolution and make a commit,\n"
+                        "or use 'git commit -a'."));
+       return -1;
+}
+
+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);
 }