1/* ui-patch.c: generate patch view
 2 *
 3 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
 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(const char *new_rev, const char *old_rev,
15		      const char *prefix)
16{
17	struct rev_info rev;
18	struct commit *commit;
19	struct object_id new_rev_oid, old_rev_oid;
20	char rev_range[2 * 40 + 3];
21	const char *rev_argv[] = { NULL, "--reverse", "--format=email", rev_range, "--", prefix, NULL };
22	int rev_argc = ARRAY_SIZE(rev_argv) - 1;
23	char *patchname;
24
25	if (!prefix)
26		rev_argc--;
27
28	if (!new_rev)
29		new_rev = ctx.qry.head;
30
31	if (get_oid(new_rev, &new_rev_oid)) {
32		cgit_print_error_page(404, "Not found",
33				"Bad object id: %s", new_rev);
34		return;
35	}
36	commit = lookup_commit_reference(&new_rev_oid);
37	if (!commit) {
38		cgit_print_error_page(404, "Not found",
39				"Bad commit reference: %s", new_rev);
40		return;
41	}
42
43	if (old_rev) {
44		if (get_oid(old_rev, &old_rev_oid)) {
45			cgit_print_error_page(404, "Not found",
46					"Bad object id: %s", old_rev);
47			return;
48		}
49		if (!lookup_commit_reference(&old_rev_oid)) {
50			cgit_print_error_page(404, "Not found",
51					"Bad commit reference: %s", old_rev);
52			return;
53		}
54	} else if (commit->parents && commit->parents->item) {
55		oidcpy(&old_rev_oid, &commit->parents->item->object.oid);
56	} else {
57		oidclr(&old_rev_oid);
58	}
59
60	if (is_null_oid(&old_rev_oid)) {
61		memcpy(rev_range, oid_to_hex(&new_rev_oid), GIT_SHA1_HEXSZ + 1);
62	} else {
63		sprintf(rev_range, "%s..%s", oid_to_hex(&old_rev_oid),
64			oid_to_hex(&new_rev_oid));
65	}
66
67	patchname = fmt("%s.patch", rev_range);
68	ctx.page.mimetype = "text/plain";
69	ctx.page.filename = patchname;
70	cgit_print_http_headers();
71
72	if (ctx.cfg.noplainemail) {
73		rev_argv[2] = "--format=format:From %H Mon Sep 17 00:00:00 "
74			      "2001%nFrom: %an%nDate: %aD%n%w(78,0,1)Subject: "
75			      "%s%n%n%w(0)%b";
76	}
77
78	init_revisions(&rev, NULL);
79	rev.abbrev = DEFAULT_ABBREV;
80	rev.verbose_header = 1;
81	rev.diff = 1;
82	rev.show_root_diff = 1;
83	rev.max_parents = 1;
84	rev.diffopt.output_format |= DIFF_FORMAT_DIFFSTAT |
85			DIFF_FORMAT_PATCH | DIFF_FORMAT_SUMMARY;
86	if (prefix)
87		rev.diffopt.stat_sep = fmt("(limited to '%s')\n\n", prefix);
88	setup_revisions(rev_argc, rev_argv, &rev, NULL);
89	prepare_revision_walk(&rev);
90
91	while ((commit = get_revision(&rev)) != NULL) {
92		log_tree_commit(&rev, commit);
93		printf("-- \ncgit %s\n\n", cgit_version);
94	}
95}