ui-patch.c

   1 /* ui-patch.c: generate patch view
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   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 /* two commit hashes with two dots in between and termination */
  15 #define REV_RANGE_LEN 2 * GIT_MAX_HEXSZ + 3
  16
  17 void cgit_print_patch(const char *new_rev, const char *old_rev,
  18                       const char *prefix)
  19 {
  20         struct rev_info rev;
  21         struct commit *commit;
  22         struct object_id new_rev_oid, old_rev_oid;
  23         char rev_range[REV_RANGE_LEN];
  24         const char *rev_argv[] = { NULL, "--reverse", "--format=email", rev_range, "--", prefix, NULL };
  25         int rev_argc = ARRAY_SIZE(rev_argv) - 1;
  26         char *patchname;
  27
  28         if (!prefix)
  29                 rev_argc--;
  30
  31         if (!new_rev)
  32                 new_rev = ctx.qry.head;
  33
  34         if (get_oid(new_rev, &new_rev_oid)) {
  35                 cgit_print_error_page(404, "Not found",
  36                                 "Bad object id: %s", new_rev);
  37                 return;
  38         }
  39         commit = lookup_commit_reference(the_repository, &new_rev_oid);
  40         if (!commit) {
  41                 cgit_print_error_page(404, "Not found",
  42                                 "Bad commit reference: %s", new_rev);
  43                 return;
  44         }
  45
  46         if (old_rev) {
  47                 if (get_oid(old_rev, &old_rev_oid)) {
  48                         cgit_print_error_page(404, "Not found",
  49                                         "Bad object id: %s", old_rev);
  50                         return;
  51                 }
  52                 if (!lookup_commit_reference(the_repository, &old_rev_oid)) {
  53                         cgit_print_error_page(404, "Not found",
  54                                         "Bad commit reference: %s", old_rev);
  55                         return;
  56                 }
  57         } else if (commit->parents && commit->parents->item) {
  58                 oidcpy(&old_rev_oid, &commit->parents->item->object.oid);
  59         } else {
  60                 oidclr(&old_rev_oid);
  61         }
  62
  63         if (is_null_oid(&old_rev_oid)) {
  64                 memcpy(rev_range, oid_to_hex(&new_rev_oid), the_hash_algo->hexsz + 1);
  65         } else {
  66                 xsnprintf(rev_range, REV_RANGE_LEN, "%s..%s", oid_to_hex(&old_rev_oid),
  67                         oid_to_hex(&new_rev_oid));
  68         }
  69
  70         patchname = fmt("%s.patch", rev_range);
  71         ctx.page.mimetype = "text/plain";
  72         ctx.page.filename = patchname;
  73         cgit_print_http_headers();
  74
  75         if (ctx.cfg.noplainemail) {
  76                 rev_argv[2] = "--format=format:From %H Mon Sep 17 00:00:00 "
  77                               "2001%nFrom: %an%nDate: %aD%n%w(78,0,1)Subject: "
  78                               "%s%n%n%w(0)%b";
  79         }
  80
  81         init_revisions(&rev, NULL);
  82         rev.abbrev = DEFAULT_ABBREV;
  83         rev.verbose_header = 1;
  84         rev.diff = 1;
  85         rev.show_root_diff = 1;
  86         rev.max_parents = 1;
  87         rev.diffopt.output_format |= DIFF_FORMAT_DIFFSTAT |
  88                         DIFF_FORMAT_PATCH | DIFF_FORMAT_SUMMARY;
  89         if (prefix)
  90                 rev.diffopt.stat_sep = fmt("(limited to '%s')\n\n", prefix);
  91         setup_revisions(rev_argc, rev_argv, &rev, NULL);
  92         prepare_revision_walk(&rev);
  93
  94         while ((commit = get_revision(&rev)) != NULL) {
  95                 log_tree_commit(&rev, commit);
  96                 printf("-- \ncgit %s\n\n", cgit_version);
  97         }
  98 }