Merge remote-tracking branch 'ko/maint' into jc/diff-index-quick-exit-early

* ko/maint: (4352 commits)
  git-submodule.sh: separate parens by a space to avoid confusing some shells
  Documentation/technical/api-diff.txt: correct name of diff_unmerge()
  read_gitfile_gently: use ssize_t to hold read result
  remove tests of always-false condition
  rerere.c: diagnose a corrupt MERGE_RR when hitting EOF between TAB and '\0'
  Git 1.7.5.3
  init/clone: remove short option -L and document --separate-git-dir
  do not read beyond end of malloc'd buffer
  git-svn: Fix git svn log --show-commit
  Git 1.7.5.2
  provide a copy of the LGPLv2.1
  test core.gitproxy configuration
  copy_gecos: fix not adding nlen to len when processing "&"
  Update draft release notes to 1.7.5.2
  Documentation/git-fsck.txt: fix typo: unreadable -> unreachable
  send-pack: avoid deadlock on git:// push with failed pack-objects
  connect: let callers know if connection is a socket
  connect: treat generic proxy processes like ssh processes
  sideband_demux(): fix decl-after-stmt
  t3503: test cherry picking and reverting root commits
  ...

Conflicts:
	diff.c

1 files changed, 49 insertions, 0 deletions

diff --git a/advice.c b/advice.c
new file mode 100644
index 0000000000..0be4b5f008
--- /dev/null
+++ b/advice.c
@@ -0,0 +1,49 @@
+#include "cache.h"
+
+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;
+	int *preference;
+} advice_config[] = {
+	{ "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 },
+};
+
+int git_default_advice_config(const char *var, const char *value)
+{
+	const char *k = skip_prefix(var, "advice.");
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(advice_config); i++) {
+		if (strcmp(k, advice_config[i].name))
+			continue;
+		*advice_config[i].preference = git_config_bool(var, value);
+		return 0;
+	}
+
+	return 0;
+}
+
+void NORETURN die_resolve_conflict(const char *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);
+}