ui-patch.c

   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
  13 static 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
  22 static 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
  58 static 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
  73 void 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
  94         if (commit->parents && commit->parents->item)
  95                 hashcpy(old_sha1, commit->parents->item->object.sha1);
  96         else
  97                 hashclr(old_sha1);
  98
  99         patchname = fmt("%s.patch", sha1_to_hex(sha1));
 100         ctx.page.mimetype = "text/plain";
 101         ctx.page.filename = patchname;
 102         cgit_print_http_headers(&ctx);
 103         htmlf("From %s Mon Sep 17 00:00:00 2001\n", sha1_to_hex(sha1));
 104         htmlf("From: %s%s\n", info->author, info->author_email);
 105         html("Date: ");
 106         cgit_print_date(info->author_date, "%a, %d  %b  %Y  %H:%M:%S  %z%n", ctx.cfg.local_time);
 107         htmlf("Subject: %s\n\n", info->subject);
 108         if (info->msg && *info->msg) {
 109                 htmlf("%s", info->msg);
 110                 if (info->msg[strlen(info->msg) - 1] != '\n')
 111                         html("\n");
 112         }
 113         html("---\n");
 114         cgit_diff_tree(old_sha1, sha1, filepair_cb, NULL);
 115         html("--\n");
 116         htmlf("cgit %s\n", CGIT_VERSION);
 117         cgit_free_commitinfo(info);
 118 }