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
 12static void print_line(char *line, int len)
 13{
 14	char c = line[len-1];
 15
 16	line[len-1] = '\0';
 17	htmlf("%s\n", line);
 18	line[len-1] = c;
 19}
 20
 21static void header(unsigned char *sha1, char *path1, int mode1,
 22		   unsigned char *sha2, char *path2, int mode2)
 23{
 24	char *abbrev1, *abbrev2;
 25	int subproject;
 26
 27	subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2));
 28	htmlf("diff --git a/%s b/%s\n", path1, path2);
 29
 30	if (is_null_sha1(sha1))
 31		path1 = "dev/null";
 32	if (is_null_sha1(sha2))
 33		path2 = "dev/null";
 34
 35	if (mode1 == 0)
 36		htmlf("new file mode %.6o\n", mode2);
 37
 38	if (mode2 == 0)
 39		htmlf("deleted file mode %.6o\n", mode1);
 40
 41	if (!subproject) {
 42		abbrev1 = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
 43		abbrev2 = xstrdup(find_unique_abbrev(sha2, DEFAULT_ABBREV));
 44		htmlf("index %s..%s", abbrev1, abbrev2);
 45		free(abbrev1);
 46		free(abbrev2);
 47		if (mode1 != 0 && mode2 != 0) {
 48			htmlf(" %.6o", mode1);
 49			if (mode2 != mode1)
 50				htmlf("..%.6o", mode2);
 51		}
 52		htmlf("\n--- a/%s\n", path1);
 53		htmlf("+++ b/%s\n", path2);
 54	}
 55}
 56
 57static void filepair_cb(struct diff_filepair *pair)
 58{
 59	header(pair->one->sha1, pair->one->path, pair->one->mode,
 60	       pair->two->sha1, pair->two->path, pair->two->mode);
 61	if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
 62		if (S_ISGITLINK(pair->one->mode))
 63			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
 64		if (S_ISGITLINK(pair->two->mode))
 65			print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
 66		return;
 67	}
 68	if (cgit_diff_files(pair->one->sha1, pair->two->sha1, print_line))
 69		html("Error running diff");
 70}
 71
 72void cgit_print_patch(char *hex)
 73{
 74	struct commit *commit;
 75	struct commitinfo *info;
 76	unsigned char sha1[20], old_sha1[20];
 77	char *patchname;
 78
 79	if (!hex)
 80		hex = ctx.qry.head;
 81
 82	if (get_sha1(hex, sha1)) {
 83		cgit_print_error(fmt("Bad object id: %s", hex));
 84		return;
 85	}
 86	commit = lookup_commit_reference(sha1);
 87	if (!commit) {
 88		cgit_print_error(fmt("Bad commit reference: %s", hex));
 89		return;
 90	}
 91	info = cgit_parse_commit(commit);
 92	hashcpy(old_sha1, commit->parents->item->object.sha1);
 93
 94	patchname = fmt("%s.patch", sha1_to_hex(sha1));
 95	ctx.page.mimetype = "text/plain";
 96	ctx.page.filename = patchname;
 97	cgit_print_http_headers(&ctx);
 98	htmlf("From %s Mon Sep 17 00:00:00 2001\n", sha1_to_hex(sha1));
 99	htmlf("From: %s%s\n", info->author, info->author_email);
100	html("Date: ");
101	cgit_print_date(info->author_date, "%a, %d  %b  %Y  %H:%M:%S  %z%n");
102	htmlf("Subject: %s\n\n", info->subject);
103	if (info->msg && *info->msg) {
104		htmlf("%s", info->msg);
105		if (info->msg[strlen(info->msg) - 1] != '\n')
106			html("\n");
107	}
108	html("---\n");
109	cgit_diff_tree(old_sha1, sha1, filepair_cb, NULL);
110	html("--\n");
111	htmlf("cgit %s\n", CGIT_VERSION);
112	cgit_free_commitinfo(info);
113}