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