notes.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "notes.h"
   4 #include "refs.h"
   5 #include "utf8.h"
   6 #include "strbuf.h"
   7
   8 static int initialized;
   9
  10 void get_commit_notes(const struct commit *commit, struct strbuf *sb,
  11                 const char *output_encoding)
  12 {
  13         static const char utf8[] = "utf-8";
  14         struct strbuf name = STRBUF_INIT;
  15         unsigned char sha1[20];
  16         char *msg, *msg_p;
  17         unsigned long linelen, msglen;
  18         enum object_type type;
  19
  20         if (!initialized) {
  21                 const char *env = getenv(GIT_NOTES_REF_ENVIRONMENT);
  22                 if (env)
  23                         notes_ref_name = getenv(GIT_NOTES_REF_ENVIRONMENT);
  24                 else if (!notes_ref_name)
  25                         notes_ref_name = GIT_NOTES_DEFAULT_REF;
  26                 if (notes_ref_name && read_ref(notes_ref_name, sha1))
  27                         notes_ref_name = NULL;
  28                 initialized = 1;
  29         }
  30
  31         if (!notes_ref_name)
  32                 return;
  33
  34         strbuf_addf(&name, "%s:%s", notes_ref_name,
  35                         sha1_to_hex(commit->object.sha1));
  36         if (get_sha1(name.buf, sha1))
  37                 return;
  38
  39         if (!(msg = read_sha1_file(sha1, &type, &msglen)) || !msglen ||
  40                         type != OBJ_BLOB) {
  41                 free(msg);
  42                 return;
  43         }
  44
  45         if (output_encoding && *output_encoding &&
  46                         strcmp(utf8, output_encoding)) {
  47                 char *reencoded = reencode_string(msg, output_encoding, utf8);
  48                 if (reencoded) {
  49                         free(msg);
  50                         msg = reencoded;
  51                         msglen = strlen(msg);
  52                 }
  53         }
  54
  55         /* we will end the annotation by a newline anyway */
  56         if (msglen && msg[msglen - 1] == '\n')
  57                 msglen--;
  58
  59         strbuf_addstr(sb, "\nNotes:\n");
  60
  61         for (msg_p = msg; msg_p < msg + msglen; msg_p += linelen + 1) {
  62                 linelen = strchrnul(msg_p, '\n') - msg_p;
  63
  64                 strbuf_addstr(sb, "    ");
  65                 strbuf_add(sb, msg_p, linelen);
  66                 strbuf_addch(sb, '\n');
  67         }
  68
  69         free(msg);
  70 }