Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "commit.h"
   3#include "attr.h"
   4
   5static void format_subst(const struct commit *commit,
   6                         const char *src, size_t len,
   7                         struct strbuf *buf)
   8{
   9        char *to_free = NULL;
  10        struct strbuf fmt;
  11
  12        if (src == buf->buf)
  13                to_free = strbuf_detach(buf, NULL);
  14        strbuf_init(&fmt, 0);
  15        for (;;) {
  16                const char *b, *c;
  17
  18                b = memmem(src, len, "$Format:", 8);
  19                if (!b)
  20                        break;
  21                c = memchr(b + 8, '$', (src + len) - b - 8);
  22                if (!c)
  23                        break;
  24
  25                strbuf_reset(&fmt);
  26                strbuf_add(&fmt, b + 8, c - b - 8);
  27
  28                strbuf_add(buf, src, b - src);
  29                format_commit_message(commit, fmt.buf, buf);
  30                len -= c + 1 - src;
  31                src  = c + 1;
  32        }
  33        strbuf_add(buf, src, len);
  34        strbuf_release(&fmt);
  35        free(to_free);
  36}
  37
  38static int convert_to_archive(const char *path,
  39                              const void *src, size_t len,
  40                              struct strbuf *buf,
  41                              const struct commit *commit)
  42{
  43        static struct git_attr *attr_export_subst;
  44        struct git_attr_check check[1];
  45
  46        if (!commit)
  47                return 0;
  48
  49        if (!attr_export_subst)
  50                attr_export_subst = git_attr("export-subst", 12);
  51
  52        check[0].attr = attr_export_subst;
  53        if (git_checkattr(path, ARRAY_SIZE(check), check))
  54                return 0;
  55        if (!ATTR_TRUE(check[0].value))
  56                return 0;
  57
  58        format_subst(commit, src, len, buf);
  59        return 1;
  60}
  61
  62void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
  63                           unsigned int mode, enum object_type *type,
  64                           unsigned long *sizep,
  65                           const struct commit *commit)
  66{
  67        void *buffer;
  68
  69        buffer = read_sha1_file(sha1, type, sizep);
  70        if (buffer && S_ISREG(mode)) {
  71                struct strbuf buf;
  72                size_t size = 0;
  73
  74                strbuf_init(&buf, 0);
  75                strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
  76                convert_to_working_tree(path, buf.buf, buf.len, &buf);
  77                convert_to_archive(path, buf.buf, buf.len, &buf, commit);
  78                buffer = strbuf_detach(&buf, &size);
  79                *sizep = size;
  80        }
  81
  82        return buffer;
  83}
  84