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
  11 static void print_line(char *line, int len)
  12 {
  13         char c = line[len-1];
  14
  15         line[len-1] = '\0';
  16         htmlf("%s\n", line);
  17         line[len-1] = c;
  18 }
  19
  20 static void header(unsigned char *sha1, char *path1, int mode1,
  21                    unsigned char *sha2, char *path2, int mode2)
  22 {
  23         char *abbrev1, *abbrev2;
  24         int subproject;
  25
  26         subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2));
  27         htmlf("diff --git a/%s b/%s\n", path1, path2);
  28
  29         if (is_null_sha1(sha1))
  30                 path1 = "dev/null";
  31         if (is_null_sha1(sha2))
  32                 path2 = "dev/null";
  33
  34         if (mode1 == 0)
  35                 htmlf("new file mode %.6o\n", mode2);
  36
  37         if (mode2 == 0)
  38                 htmlf("deleted file mode %.6o\n", mode1);
  39
  40         if (!subproject) {
  41                 abbrev1 = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));
  42                 abbrev2 = xstrdup(find_unique_abbrev(sha2, DEFAULT_ABBREV));
  43                 htmlf("index %s..%s", abbrev1, abbrev2);
  44                 free(abbrev1);
  45                 free(abbrev2);
  46                 if (mode1 != 0 && mode2 != 0) {
  47                         htmlf(" %.6o", mode1);
  48                         if (mode2 != mode1)
  49                                 htmlf("..%.6o", mode2);
  50                 }
  51                 htmlf("\n--- a/%s\n", path1);
  52                 htmlf("+++ b/%s\n", path2);
  53         }
  54 }
  55
  56 static void filepair_cb(struct diff_filepair *pair)
  57 {
  58         header(pair->one->sha1, pair->one->path, pair->one->mode,
  59                pair->two->sha1, pair->two->path, pair->two->mode);
  60         if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
  61                 if (S_ISGITLINK(pair->one->mode))
  62                         print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
  63                 if (S_ISGITLINK(pair->two->mode))
  64                         print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
  65                 return;
  66         }
  67         if (cgit_diff_files(pair->one->sha1, pair->two->sha1, print_line))
  68                 html("Error running diff");
  69 }
  70
  71 void cgit_print_patch(char *hex, struct cacheitem *item)
  72 {
  73         struct commit *commit;
  74         struct commitinfo *info;
  75         unsigned char sha1[20], old_sha1[20];
  76         char *patchname;
  77
  78         if (!hex)
  79                 hex = cgit_query_head;
  80
  81         if (get_sha1(hex, sha1)) {
  82                 cgit_print_error(fmt("Bad object id: %s", hex));
  83                 return;
  84         }
  85         commit = lookup_commit_reference(sha1);
  86         if (!commit) {
  87                 cgit_print_error(fmt("Bad commit reference: %s", hex));
  88                 return;
  89         }
  90         info = cgit_parse_commit(commit);
  91         hashcpy(old_sha1, commit->parents->item->object.sha1);
  92
  93         patchname = fmt("%s.patch", sha1_to_hex(sha1));
  94         cgit_print_snapshot_start("text/plain", patchname, item);
  95         htmlf("From %s Mon Sep 17 00:00:00 2001\n", sha1_to_hex(sha1));
  96         htmlf("From: %s%s\n", info->author, info->author_email);
  97         html("Date: ");
  98         cgit_print_date(info->author_date, "%a, %d  %b  %Y  %H:%M:%S  %z%n");
  99         htmlf("Subject: %s\n\n%s", info->subject, info->msg);
 100         html("---\n");
 101         cgit_diff_tree(old_sha1, sha1, filepair_cb, NULL);
 102         html("--\n");
 103         htmlf("cgit %s\n", CGIT_VERSION);
 104         cgit_free_commitinfo(info);
 105 }