From 70b006b9712b57741ec1320b15aef2f8b1d6a905 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@osdl.org>
Date: Tue, 28 Feb 2006 11:30:19 -0800
Subject: [PATCH] Tie it all together: "git log"

This is what the previous diffs all built up to.

We can do "git log" as a trivial small helper function inside git.c,
because the infrastructure is all there for us to use as a library.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 Makefile |  2 +-
 git.c    | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 0b1a9988b4..ead13bec0d 100644
--- a/Makefile
+++ b/Makefile
@@ -450,7 +450,7 @@ strip: $(PROGRAMS) git$X
 
 git$X: git.c $(LIB_FILE)
 	$(CC) -DGIT_VERSION='"$(GIT_VERSION)"' \
-		$(CFLAGS) $(COMPAT_CFLAGS) -o $@ $(filter %.c,$^) $(LIB_FILE)
+		$(ALL_CFLAGS) -o $@ $(filter %.c,$^) $(LIB_FILE) $(LIBS)
 
 $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
 	rm -f $@
diff --git a/git.c b/git.c
index 993cd0d490..b0da6b1945 100644
--- a/git.c
+++ b/git.c
@@ -12,6 +12,10 @@
 #include "git-compat-util.h"
 #include "exec_cmd.h"
 
+#include "cache.h"
+#include "commit.h"
+#include "revision.h"
+
 #ifndef PATH_MAX
 # define PATH_MAX 4096
 #endif
@@ -245,6 +249,25 @@ static int cmd_help(int argc, char **argv, char **envp)
 	return 0;
 }
 
+#define LOGSIZE (65536)
+
+static int cmd_log(int argc, char **argv, char **envp)
+{
+	struct rev_info rev;
+	struct commit *commit;
+	char *buf = xmalloc(LOGSIZE);
+
+	argc = setup_revisions(argc, argv, &rev, "HEAD");
+	prepare_revision_walk(&rev);
+	setup_pager();
+	while ((commit = get_revision(&rev)) != NULL) {
+		pretty_print_commit(CMIT_FMT_DEFAULT, commit, ~0, buf, LOGSIZE, 18);
+		printf("%s\n", buf);
+	}
+	free(buf);
+	return 0;
+}
+
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 
 static void handle_internal_command(int argc, char **argv, char **envp)
@@ -256,6 +279,7 @@ static void handle_internal_command(int argc, char **argv, char **envp)
 	} commands[] = {
 		{ "version", cmd_version },
 		{ "help", cmd_help },
+		{ "log", cmd_log },
 	};
 	int i;