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         unsigned long old_size = 0;
  61         unsigned long new_size = 0;
  62         int binary = 0;
  63
  64         header(pair->one->sha1, pair->one->path, pair->one->mode,
  65                pair->two->sha1, pair->two->path, pair->two->mode);
  66         if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
  67                 if (S_ISGITLINK(pair->one->mode))
  68                         print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
  69                 if (S_ISGITLINK(pair->two->mode))
  70                         print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
  71                 return;
  72         }
  73         if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
  74                             &new_size, &binary, 0, 0, print_line))
  75                 html("Error running diff");
  76         if (binary)
  77                 html("Binary files differ\n");
  78 }
  79
  80 void cgit_print_patch(char *hex, const char *prefix)
  81 {
  82         struct commit *commit;
  83         struct commitinfo *info;
  84         unsigned char sha1[20], old_sha1[20];
  85         char *patchname;
  86
  87         if (!hex)
  88                 hex = ctx.qry.head;
  89
  90         if (get_sha1(hex, sha1)) {
  91                 cgit_print_error(fmt("Bad object id: %s", hex));
  92                 return;
  93         }
  94         commit = lookup_commit_reference(sha1);
  95         if (!commit) {
  96                 cgit_print_error(fmt("Bad commit reference: %s", hex));
  97                 return;
  98         }
  99         info = cgit_parse_commit(commit);
 100
 101         if (commit->parents && commit->parents->item)
 102                 hashcpy(old_sha1, commit->parents->item->object.sha1);
 103         else
 104                 hashclr(old_sha1);
 105
 106         patchname = fmt("%s.patch", sha1_to_hex(sha1));
 107         ctx.page.mimetype = "text/plain";
 108         ctx.page.filename = patchname;
 109         cgit_print_http_headers(&ctx);
 110         htmlf("From %s Mon Sep 17 00:00:00 2001\n", sha1_to_hex(sha1));
 111         htmlf("From: %s", info->author);
 112         if (!ctx.cfg.noplainemail) {
 113                 htmlf(" %s", info->author_email);
 114         }
 115         html("\n");
 116         html("Date: ");
 117         cgit_print_date(info->author_date, "%a, %d %b %Y %H:%M:%S %z%n", ctx.cfg.local_time);
 118         htmlf("Subject: %s\n\n", info->subject);
 119         if (info->msg && *info->msg) {
 120                 htmlf("%s", info->msg);
 121                 if (info->msg[strlen(info->msg) - 1] != '\n')
 122                         html("\n");
 123         }
 124         html("---\n");
 125         if (prefix)
 126                 htmlf("(limited to '%s')\n\n", prefix);
 127         cgit_diff_tree(old_sha1, sha1, filepair_cb, prefix, 0);
 128         html("--\n");
 129         htmlf("cgit %s\n", CGIT_VERSION);
 130         cgit_free_commitinfo(info);
 131 }