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 "ui-patch.h"
  11 #include "html.h"
  12 #include "ui-shared.h"
  13
  14 static void print_line(char *line, int len)
  15 {
  16         char c = line[len-1];
  17
  18         line[len-1] = '\0';
  19         htmlf("%s\n", line);
  20         line[len-1] = c;
  21 }
  22
  23 static void header(unsigned char *sha1, char *path1, int mode1,
  24                    unsigned char *sha2, char *path2, int mode2)
  25 {
  26         char *abbrev1, *abbrev2;
  27         int subproject;
  28
  29         subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2));
  30         htmlf("diff --git a/%s b/%s\n", path1, path2);
  31
  32         if (mode1 == 0)
  33                 htmlf("new file mode %.6o\n", mode2);
  34
  35         if (mode2 == 0)
  36                 htmlf("deleted file mode %.6o\n", mode1);
  37
  38         if (!subproject) {
  39                 abbrev1 = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
  40                 abbrev2 = xstrdup(find_unique_abbrev(sha2, DEFAULT_ABBREV));
  41                 htmlf("index %s..%s", abbrev1, abbrev2);
  42                 free(abbrev1);
  43                 free(abbrev2);
  44                 if (mode1 != 0 && mode2 != 0) {
  45                         htmlf(" %.6o", mode1);
  46                         if (mode2 != mode1)
  47                                 htmlf("..%.6o", mode2);
  48                 }
  49
  50                 if (is_null_sha1(sha1)) {
  51                         path1 = "dev/null";
  52                         htmlf("\n--- /%s\n", path1);
  53                 } else
  54                         htmlf("\n--- a/%s\n", path1);
  55
  56                 if (is_null_sha1(sha2)) {
  57                         path2 = "dev/null";
  58                         htmlf("+++ /%s\n", path2);
  59                 } else
  60                         htmlf("+++ b/%s\n", path2);
  61         }
  62 }
  63
  64 static void filepair_cb(struct diff_filepair *pair)
  65 {
  66         unsigned long old_size = 0;
  67         unsigned long new_size = 0;
  68         int binary = 0;
  69
  70         header(pair->one->sha1, pair->one->path, pair->one->mode,
  71                pair->two->sha1, pair->two->path, pair->two->mode);
  72         if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
  73                 if (S_ISGITLINK(pair->one->mode))
  74                         print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
  75                 if (S_ISGITLINK(pair->two->mode))
  76                         print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
  77                 return;
  78         }
  79         if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
  80                             &new_size, &binary, 0, 0, print_line))
  81                 html("Error running diff");
  82         if (binary)
  83                 html("Binary files differ\n");
  84 }
  85
  86 void cgit_print_patch(char *hex, const char *prefix)
  87 {
  88         struct commit *commit;
  89         struct commitinfo *info;
  90         unsigned char sha1[20], old_sha1[20];
  91         char *patchname;
  92
  93         if (!hex)
  94                 hex = ctx.qry.head;
  95
  96         if (get_sha1(hex, sha1)) {
  97                 cgit_print_error(fmt("Bad object id: %s", hex));
  98                 return;
  99         }
 100         commit = lookup_commit_reference(sha1);
 101         if (!commit) {
 102                 cgit_print_error(fmt("Bad commit reference: %s", hex));
 103                 return;
 104         }
 105         info = cgit_parse_commit(commit);
 106
 107         if (commit->parents && commit->parents->item)
 108                 hashcpy(old_sha1, commit->parents->item->object.sha1);
 109         else
 110                 hashclr(old_sha1);
 111
 112         patchname = fmt("%s.patch", sha1_to_hex(sha1));
 113         ctx.page.mimetype = "text/plain";
 114         ctx.page.filename = patchname;
 115         cgit_print_http_headers(&ctx);
 116         htmlf("From %s Mon Sep 17 00:00:00 2001\n", sha1_to_hex(sha1));
 117         htmlf("From: %s", info->author);
 118         if (!ctx.cfg.noplainemail) {
 119                 htmlf(" %s", info->author_email);
 120         }
 121         html("\n");
 122         html("Date: ");
 123         cgit_print_date(info->author_date, "%a, %d %b %Y %H:%M:%S %z%n", ctx.cfg.local_time);
 124         htmlf("Subject: %s\n\n", info->subject);
 125         if (info->msg && *info->msg) {
 126                 htmlf("%s", info->msg);
 127                 if (info->msg[strlen(info->msg) - 1] != '\n')
 128                         html("\n");
 129         }
 130         html("---\n");
 131         if (prefix)
 132                 htmlf("(limited to '%s')\n\n", prefix);
 133         cgit_diff_tree(old_sha1, sha1, filepair_cb, prefix, 0);
 134         html("--\n");
 135         htmlf("cgit %s\n", cgit_version);
 136         cgit_free_commitinfo(info);
 137 }