From cee99d2257790edea79a11513032f95475e07acc Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Fri, 6 May 2005 11:42:47 -0700
Subject: diff-tree: add "verbose header" mode
This allows you to trivially do fancy and readable output. Something like
git-rev-list HEAD | git-diff-tree -p -v --stdin kernel/ | less -S
gives a nice output of what has changed in the kernel/ subdirectory lately.
---
diff-tree.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 58 insertions(+), 3 deletions(-)
(limited to 'diff-tree.c')
diff --git a/diff-tree.c b/diff-tree.c
index b9267d6159..b8abe207c5 100644
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -3,12 +3,14 @@
#include "diff.h"
static int silent = 0;
+static int verbose_header = 0;
static int ignore_merges = 1;
static int recursive = 0;
static int read_stdin = 0;
static int line_termination = '\n';
static int generate_patch = 0;
static const char *header = NULL;
+static const char *header_prefix = "";
// What paths are we interested in?
static int nr_paths = 0;
@@ -270,12 +272,59 @@ static int diff_tree_sha1(const unsigned char *old, const unsigned char *new, co
return retval;
}
+static int get_one_line(const char *msg, unsigned long len)
+{
+ int ret = 0;
+
+ while (len--) {
+ ret++;
+ if (*msg++ == '\n')
+ break;
+ }
+ return ret;
+}
+
+static char *generate_header(const char *commit, const char *parent, const char *msg, unsigned long len)
+{
+ static char this_header[1000];
+ int offset;
+
+ offset = sprintf(this_header, "%s%s (from %s)\n", header_prefix, commit, parent);
+ if (verbose_header) {
+ int hdr = 1;
+
+ for (;;) {
+ const char *line = msg;
+ int linelen = get_one_line(msg, len);
+
+ if (!linelen)
+ break;
+ if (offset + linelen + 10 > sizeof(this_header))
+ break;
+
+ msg += linelen;
+ len -= linelen;
+ if (linelen == 1)
+ hdr = 0;
+ if (hdr)
+ continue;
+ memset(this_header + offset, ' ', 4);
+ memcpy(this_header + offset + 4, line, linelen);
+ offset += linelen + 4;
+ }
+ this_header[offset++] = '\n';
+ this_header[offset] = 0;
+ }
+
+ return this_header;
+}
+
static int diff_tree_stdin(char *line)
{
int len = strlen(line);
unsigned char commit[20], parent[20];
unsigned long size, offset;
- static char this_header[100];
+ static char this_header[1000];
char *buf;
if (!len || line[len-1] != '\n')
@@ -305,9 +354,10 @@ static int diff_tree_stdin(char *line)
while (offset + 48 < size && !memcmp(buf + offset, "parent ", 7)) {
if (get_sha1_hex(buf + offset + 7, parent))
return -1;
- sprintf(this_header, "%s (from %s)\n", line, sha1_to_hex(parent));
- header = this_header;
+ header = generate_header(line, sha1_to_hex(parent), buf, size);
diff_tree_sha1(parent, commit, "");
+ if (!header && verbose_header)
+ header_prefix = "\ndiff-tree ";
offset += 48;
}
return -1;
@@ -354,6 +404,11 @@ int main(int argc, char **argv)
silent = 1;
continue;
}
+ if (!strcmp(arg, "-v")) {
+ verbose_header = 1;
+ header_prefix = "diff-tree ";
+ continue;
+ }
if (!strcmp(arg, "--stdin")) {
read_stdin = 1;
continue;
--
cgit v1.2.1