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 "ui-patch.h"
11#include "html.h"
12#include "ui-shared.h"
13
14void cgit_print_patch(char *hex, const char *old_rev, const char *prefix)
15{
16	struct rev_info rev;
17	struct commit *commit;
18	unsigned char sha1[20], old_sha1[20];
19	char rev_range[2 * 40 + 3];
20	char *rev_argv[] = { NULL, "--reverse", "--format=email", rev_range };
21	char *patchname;
22
23	if (!hex)
24		hex = ctx.qry.head;
25
26	if (get_sha1(hex, sha1)) {
27		cgit_print_error("Bad object id: %s", hex);
28		return;
29	}
30	commit = lookup_commit_reference(sha1);
31	if (!commit) {
32		cgit_print_error("Bad commit reference: %s", hex);
33		return;
34	}
35
36	if (old_rev) {
37		if (get_sha1(old_rev, old_sha1)) {
38			cgit_print_error("Bad object id: %s", old_rev);
39			return;
40		}
41		if (!lookup_commit_reference(old_sha1)) {
42			cgit_print_error("Bad commit reference: %s", old_rev);
43			return;
44		}
45	} else if (commit->parents && commit->parents->item) {
46		hashcpy(old_sha1, commit->parents->item->object.sha1);
47	} else {
48		hashclr(old_sha1);
49	}
50
51	if (is_null_sha1(old_sha1)) {
52		memcpy(rev_range, sha1_to_hex(sha1), 41);
53	} else {
54		sprintf(rev_range, "%s..%s", sha1_to_hex(old_sha1),
55			sha1_to_hex(sha1));
56	}
57
58	patchname = fmt("%s.patch", rev_range);
59	ctx.page.mimetype = "text/plain";
60	ctx.page.filename = patchname;
61	cgit_print_http_headers(&ctx);
62
63	if (ctx.cfg.noplainemail) {
64		rev_argv[2] = "--format=format:From %H Mon Sep 17 00:00:00 "
65			      "2001%nFrom: %an%nDate: %aD%n%w(78,0,1)Subject: "
66			      "%s%n%n%w(0)%b";
67	}
68
69	init_revisions(&rev, NULL);
70	rev.abbrev = DEFAULT_ABBREV;
71	rev.verbose_header = 1;
72	rev.diff = 1;
73	rev.show_root_diff = 1;
74	rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
75	setup_revisions(ARRAY_SIZE(rev_argv), (const char **)rev_argv, &rev,
76			NULL);
77	prepare_revision_walk(&rev);
78
79	while ((commit = get_revision(&rev)) != NULL) {
80		log_tree_commit(&rev, commit);
81		printf("--\ncgit %s\n", cgit_version);
82	}
83}