1/* ui-patch.c: generate patch view
  2 *
  3 * Copyright (C) 2007 Lars Hjemli
  4 *
  5 * Licensed under GNU General Public License v2
  6 *   (see COPYING for full license text)
  7 */
  8
  9#include "cgit.h"
 10#include "html.h"
 11#include "ui-shared.h"
 12
 13static void print_line(char *line, int len)
 14{
 15	char c = line[len-1];
 16
 17	line[len-1] = '\0';
 18	htmlf("%s\n", line);
 19	line[len-1] = c;
 20}
 21
 22static void header(unsigned char *sha1, char *path1, int mode1,
 23		   unsigned char *sha2, char *path2, int mode2)
 24{
 25	char *abbrev1, *abbrev2;
 26	int subproject;
 27
 28	subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2));
 29	htmlf("diff --git a/%s b/%s\n", path1, path2);
 30
 31	if (is_null_sha1(sha1))
 32		path1 = "dev/null";
 33	if (is_null_sha1(sha2))
 34		path2 = "dev/null";
 35
 36	if (mode1 == 0)
 37		htmlf("new file mode %.6o\n", mode2);
 38
 39	if (mode2 == 0)
 40		htmlf("deleted file mode %.6o\n", mode1);
 41
 42	if (!subproject) {
 43		abbrev1 = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
 44		abbrev2 = xstrdup(find_unique_abbrev(sha2, DEFAULT_ABBREV));
 45		htmlf("index %s..%s", abbrev1, abbrev2);
 46		free(abbrev1);
 47		free(abbrev2);
 48		if (mode1 != 0 && mode2 != 0) {
 49			htmlf(" %.6o", mode1);
 50			if (mode2 != mode1)
 51				htmlf("..%.6o", mode2);
 52		}
 53		htmlf("\n--- a/%s\n", path1);
 54		htmlf("+++ b/%s\n", path2);
 55	}
 56}
 57
 58static void filepair_cb(struct diff_filepair *pair)
 59{
 60	unsigned long old_size = 0;
 61	unsigned long new_size = 0;
 62	int binary = 0;
 63
 64	header(pair->one->sha1, pair->one->path, pair->one->mode,
 65	       pair->two->sha1, pair->two->path, pair->two->mode);
 66	if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
 67		if (S_ISGITLINK(pair->one->mode))
 68			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
 69		if (S_ISGITLINK(pair->two->mode))
 70			print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
 71		return;
 72	}
 73	if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
 74			    &new_size, &binary, 0, 0, print_line))
 75		html("Error running diff");
 76	if (binary)
 77		html("Binary files differ\n");
 78}
 79
 80void cgit_print_patch(char *hex, const char *prefix)
 81{
 82	struct commit *commit;
 83	struct commitinfo *info;
 84	unsigned char sha1[20], old_sha1[20];
 85	char *patchname;
 86
 87	if (!hex)
 88		hex = ctx.qry.head;
 89
 90	if (get_sha1(hex, sha1)) {
 91		cgit_print_error(fmt("Bad object id: %s", hex));
 92		return;
 93	}
 94	commit = lookup_commit_reference(sha1);
 95	if (!commit) {
 96		cgit_print_error(fmt("Bad commit reference: %s", hex));
 97		return;
 98	}
 99	info = cgit_parse_commit(commit);
100
101	if (commit->parents && commit->parents->item)
102		hashcpy(old_sha1, commit->parents->item->object.sha1);
103	else
104		hashclr(old_sha1);
105
106	patchname = fmt("%s.patch", sha1_to_hex(sha1));
107	ctx.page.mimetype = "text/plain";
108	ctx.page.filename = patchname;
109	cgit_print_http_headers(&ctx);
110	htmlf("From %s Mon Sep 17 00:00:00 2001\n", sha1_to_hex(sha1));
111	htmlf("From: %s", info->author);
112	if (!ctx.cfg.noplainemail) {
113		htmlf(" %s", info->author_email);
114	}
115	html("\n");
116	html("Date: ");
117	cgit_print_date(info->author_date, "%a, %d %b %Y %H:%M:%S %z%n", ctx.cfg.local_time);
118	htmlf("Subject: %s\n\n", info->subject);
119	if (info->msg && *info->msg) {
120		htmlf("%s", info->msg);
121		if (info->msg[strlen(info->msg) - 1] != '\n')
122			html("\n");
123	}
124	html("---\n");
125	if (prefix)
126		htmlf("(limited to '%s')\n\n", prefix);
127	cgit_diff_tree(old_sha1, sha1, filepair_cb, prefix, 0);
128	html("--\n");
129	htmlf("cgit %s\n", CGIT_VERSION);
130	cgit_free_commitinfo(info);
131}