config: Introduce functions to write non-standard file

diff --git a/advice.c b/advice.c
index cb666acc3cf8fdda777febbefac455f3667759f1..e02e632df380a8e9772d9cd9b1282204c56a7d4e 100644 (file)
--- a/advice.c
+++ b/advice.c
@@ -3,6 +3,9 @@
 int advice_push_nonfastforward = 1;
 int advice_status_hints = 1;
 int advice_commit_before_merge = 1;
+int advice_resolve_conflict = 1;
+int advice_implicit_identity = 1;
+int advice_detached_head = 1;
 
 static struct {
        const char *name;
@@ -11,8 +14,20 @@ static struct {
        { "pushnonfastforward", &advice_push_nonfastforward },
        { "statushints", &advice_status_hints },
        { "commitbeforemerge", &advice_commit_before_merge },
+       { "resolveconflict", &advice_resolve_conflict },
+       { "implicitidentity", &advice_implicit_identity },
+       { "detachedhead", &advice_detached_head },
 };
 
+void advise(const char *advice, ...)
+{
+       va_list params;
+
+       va_start(params, advice);
+       vreportf("hint: ", advice, params);
+       va_end(params);
+}
+
 int git_default_advice_config(const char *var, const char *value)
 {
        const char *k = skip_prefix(var, "advice.");
@@ -27,3 +42,25 @@ int git_default_advice_config(const char *var, const char *value)
 
        return 0;
 }
+
+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.
+                */
+               advise("Fix them up in the work tree,");
+               advise("and then use 'git add/rm <file>' as");
+               advise("appropriate to mark resolution and make a commit,");
+               advise("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.");
+}