From cf39f54efc6ac45f9ef5319103a94d5afa75910e Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 8 Feb 2007 09:51:56 -0800
Subject: [PATCH] git reflog show

It makes "git reflog [show]" act as

	git log -g --pretty=oneline --abbrev-cmit

and is fairly straightforward. So you can just write

	git reflog

or

	git reflog show

and it will show you the reflog in a nice format.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 Documentation/git-reflog.txt | 17 +++++++++++++----
 builtin-log.c                | 32 ++++++++++++++++++++++++++++++++
 builtin-reflog.c             | 18 ++++++++++++------
 builtin.h                    |  1 +
 4 files changed, 58 insertions(+), 10 deletions(-)

diff --git a/Documentation/git-reflog.txt b/Documentation/git-reflog.txt
index 113886589..1e343bcdc 100644
--- a/Documentation/git-reflog.txt
+++ b/Documentation/git-reflog.txt
@@ -8,13 +8,18 @@ git-reflog - Manage reflog information
 
 SYNOPSIS
 --------
-[verse]
-'git-reflog' expire [--dry-run] [--stale-fix]
-	[--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...
-
+'git reflog' <subcommand> <options>
 
 DESCRIPTION
 -----------
+The command takes various subcommands, and different options
+depending on the subcommand:
+
+[verse]
+git reflog expire [--dry-run] [--stale-fix]
+	[--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...
+
+git reflog [show] [log-options]
 
 Reflog is a mechanism to record when the tip of branches are
 updated.  This command is to manage the information recorded in it.
@@ -25,6 +30,10 @@ Entries older than `expire` time, or entries older than
 tip, are removed from the reflog.  This is typically not used
 directly by the end users -- instead, see gitlink:git-gc[1].
 
+The subcommand "show" (which is also the default, in the absense of any
+subcommands) will take all the normal log options, and show the log of
+the current branch. It is basically an alias for 'git log -g --abbrev-commit
+--pretty=oneline', see gitlink:git-log[1].
 
 
 OPTIONS
diff --git a/builtin-log.c b/builtin-log.c
index 982d87188..af2de5437 100644
--- a/builtin-log.c
+++ b/builtin-log.c
@@ -11,6 +11,7 @@
 #include "log-tree.h"
 #include "builtin.h"
 #include "tag.h"
+#include "reflog-walk.h"
 
 static int default_show_root = 1;
 
@@ -181,6 +182,37 @@ int cmd_show(int argc, const char **argv, const char *prefix)
 	return ret;
 }
 
+/*
+ * This is equivalent to "git log -g --abbrev-commit --pretty=oneline"
+ */
+int cmd_log_reflog(int argc, const char **argv, const char *prefix)
+{
+	struct rev_info rev;
+
+	git_config(git_log_config);
+	init_revisions(&rev, prefix);
+	init_reflog_walk(&rev.reflog_info);
+	rev.abbrev_commit = 1;
+	rev.verbose_header = 1;
+	cmd_log_init(argc, argv, prefix, &rev);
+
+	/*
+	 * This means that we override whatever commit format the user gave
+	 * on the cmd line.  Sad, but cmd_log_init() currently doesn't
+	 * allow us to set a different default.
+	 */
+	rev.commit_format = CMIT_FMT_ONELINE;
+	rev.always_show_header = 1;
+
+	/*
+	 * We get called through "git reflog", so unlike the other log
+	 * routines, we need to set up our pager manually..
+	 */
+	setup_pager();
+
+	return cmd_log_walk(&rev);
+}
+
 int cmd_log(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info rev;
diff --git a/builtin-reflog.c b/builtin-reflog.c
index bfb169ac0..65b845b44 100644
--- a/builtin-reflog.c
+++ b/builtin-reflog.c
@@ -13,7 +13,7 @@
  */
 
 static const char reflog_expire_usage[] =
-"git-reflog expire [--verbose] [--dry-run] [--stale-fix] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
+"git-reflog (show|expire) [--verbose] [--dry-run] [--stale-fix] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
 
 static unsigned long default_reflog_expire;
 static unsigned long default_reflog_expire_unreachable;
@@ -372,10 +372,16 @@ static const char reflog_usage[] =
 
 int cmd_reflog(int argc, const char **argv, const char *prefix)
 {
-	if (argc < 2)
-		usage(reflog_usage);
-	else if (!strcmp(argv[1], "expire"))
+	/* With no command, we default to showing it. */
+	if (argc < 2 || *argv[1] == '-')
+		return cmd_log_reflog(argc, argv, prefix);
+
+	if (!strcmp(argv[1], "show"))
+		return cmd_log_reflog(argc - 1, argv + 1, prefix);
+
+	if (!strcmp(argv[1], "expire"))
 		return cmd_reflog_expire(argc - 1, argv + 1, prefix);
-	else
-		usage(reflog_usage);
+
+	/* Not a recognized reflog command..*/
+	usage(reflog_usage);
 }
diff --git a/builtin.h b/builtin.h
index dd0e3529b..5108fd2d7 100644
--- a/builtin.h
+++ b/builtin.h
@@ -40,6 +40,7 @@ extern int cmd_grep(int argc, const char **argv, const char *prefix);
 extern int cmd_help(int argc, const char **argv, const char *prefix);
 extern int cmd_init_db(int argc, const char **argv, const char *prefix);
 extern int cmd_log(int argc, const char **argv, const char *prefix);
+extern int cmd_log_reflog(int argc, const char **argv, const char *prefix);
 extern int cmd_ls_files(int argc, const char **argv, const char *prefix);
 extern int cmd_ls_tree(int argc, const char **argv, const char *prefix);
 extern int cmd_mailinfo(int argc, const char **argv, const char *prefix);
-- 
2.30.2