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	header(pair->one->sha1, pair->one->path, pair->one->mode,
 61	       pair->two->sha1, pair->two->path, pair->two->mode);
 62	if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
 63		if (S_ISGITLINK(pair->one->mode))
 64			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
 65		if (S_ISGITLINK(pair->two->mode))
 66			print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
 67		return;
 68	}
 69	if (cgit_diff_files(pair->one->sha1, pair->two->sha1, print_line))
 70		html("Error running diff");
 71}
 72
 73void cgit_print_patch(char *hex)
 74{
 75	struct commit *commit;
 76	struct commitinfo *info;
 77	unsigned char sha1[20], old_sha1[20];
 78	char *patchname;
 79
 80	if (!hex)
 81		hex = ctx.qry.head;
 82
 83	if (get_sha1(hex, sha1)) {
 84		cgit_print_error(fmt("Bad object id: %s", hex));
 85		return;
 86	}
 87	commit = lookup_commit_reference(sha1);
 88	if (!commit) {
 89		cgit_print_error(fmt("Bad commit reference: %s", hex));
 90		return;
 91	}
 92	info = cgit_parse_commit(commit);
 93	hashcpy(old_sha1, commit->parents->item->object.sha1);
 94
 95	patchname = fmt("%s.patch", sha1_to_hex(sha1));
 96	ctx.page.mimetype = "text/plain";
 97	ctx.page.filename = patchname;
 98	cgit_print_http_headers(&ctx);
 99	htmlf("From %s Mon Sep 17 00:00:00 2001\n", sha1_to_hex(sha1));
100	htmlf("From: %s%s\n", info->author, info->author_email);
101	html("Date: ");
102	cgit_print_date(info->author_date, "%a, %d  %b  %Y  %H:%M:%S  %z%n");
103	htmlf("Subject: %s\n\n", info->subject);
104	if (info->msg && *info->msg) {
105		htmlf("%s", info->msg);
106		if (info->msg[strlen(info->msg) - 1] != '\n')
107			html("\n");
108	}
109	html("---\n");
110	cgit_diff_tree(old_sha1, sha1, filepair_cb, NULL);
111	html("--\n");
112	htmlf("cgit %s\n", CGIT_VERSION);
113	cgit_free_commitinfo(info);
114}