git-merge: add --ff and --no-ff options

[git.git] / builtin-archive.c

diff --git a/builtin-archive.c b/builtin-archive.c
index faccce302a5ca3104aa89020c89694e682ef0ba6..a90c65ce54a1c3e415b46465a2b4c7bfdffca9ff 100644 (file)
--- a/builtin-archive.c
+++ b/builtin-archive.c
@@ -81,30 +81,73 @@ static int run_remote_archiver(const char *remote, int argc,
        return !!rv;
 }
 
+static void *format_subst(const struct commit *commit, const char *format,
+                          unsigned long *sizep)
+{
+       unsigned long len = *sizep, result_len = 0;
+       const char *a = format;
+       char *result = NULL;
+
+       for (;;) {
+               const char *b, *c;
+               char *fmt, *formatted = NULL;
+               unsigned long a_len, fmt_len, formatted_len, allocated = 0;
+
+               b = memmem(a, len, "$Format:", 8);
+               if (!b || a + len < b + 9)
+                       break;
+               c = memchr(b + 8, '$', len - 8);
+               if (!c)
+                       break;
+
+               a_len = b - a;
+               fmt_len = c - b - 8;
+               fmt = xmalloc(fmt_len + 1);
+               memcpy(fmt, b + 8, fmt_len);
+               fmt[fmt_len] = '\0';
+
+               formatted_len = format_commit_message(commit, fmt, &formatted,
+                                                     &allocated);
+               free(fmt);
+               result = xrealloc(result, result_len + a_len + formatted_len);
+               memcpy(result + result_len, a, a_len);
+               memcpy(result + result_len + a_len, formatted, formatted_len);
+               result_len += a_len + formatted_len;
+               len -= c + 1 - a;
+               a = c + 1;
+       }
+
+       if (result && len) {
+               result = xrealloc(result, result_len + len);
+               memcpy(result + result_len, a, len);
+               result_len += len;
+       }
+
+       *sizep = result_len;
+
+       return result;
+}
+
 static void *convert_to_archive(const char *path,
                                 const void *src, unsigned long *sizep,
                                 const struct commit *commit)
 {
-       static struct git_attr *attr_specfile;
+       static struct git_attr *attr_export_subst;
        struct git_attr_check check[1];
-       char *interpolated = NULL;
-       unsigned long allocated = 0;
 
        if (!commit)
                return NULL;
 
-        if (!attr_specfile)
-                attr_specfile = git_attr("specfile", 8);
+        if (!attr_export_subst)
+                attr_export_subst = git_attr("export-subst", 12);
 
-       check[0].attr = attr_specfile;
+       check[0].attr = attr_export_subst;
        if (git_checkattr(path, ARRAY_SIZE(check), check))
                return NULL;
        if (!ATTR_TRUE(check[0].value))
                return NULL;
 
-       *sizep = format_commit_message(commit, src, &interpolated, &allocated);
-
-       return interpolated;
+       return format_subst(commit, src, sizep);
 }
 
 void *sha1_file_to_archive(const char *path, const unsigned char *sha1,