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
  12 static 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
  21 static 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
  57 static 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
  72 void 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 }