branch: allow a no-op "branch -M <current-branch> HEAD"

[git.git] / builtin / for-each-ref.c

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 89e75c6894e6fdb2abbe464d825f5c7186a14141..d90e5d2b29f9ac72a104d6308c04497991a03c17 100644 (file)
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -69,6 +69,9 @@ static struct {
        { "subject" },
        { "body" },
        { "contents" },
+       { "contents:subject" },
+       { "contents:body" },
+       { "contents:signature" },
        { "upstream" },
        { "symref" },
        { "flag" },
@@ -361,6 +364,18 @@ static const char *copy_email(const char *buf)
        return xmemdupz(email, eoemail + 1 - email);
 }
 
+static char *copy_subject(const char *buf, unsigned long len)
+{
+       char *r = xmemdupz(buf, len);
+       int i;
+
+       for (i = 0; i < len; i++)
+               if (r[i] == '\n')
+                       r[i] = ' ';
+
+       return r;
+}
+
 static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
 {
        const char *eoemail = strstr(buf, "> ");
@@ -458,38 +473,56 @@ static void grab_person(const char *who, struct atom_value *val, int deref, stru
        }
 }
 
-static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body)
+static void find_subpos(const char *buf, unsigned long sz,
+                       const char **sub, unsigned long *sublen,
+                       const char **body, unsigned long *bodylen,
+                       unsigned long *nonsiglen,
+                       const char **sig, unsigned long *siglen)
 {
-       while (*buf) {
-               const char *eol = strchr(buf, '\n');
-               if (!eol)
-                       return;
-               if (eol[1] == '\n') {
-                       buf = eol + 1;
-                       break; /* found end of header */
-               }
-               buf = eol + 1;
+       const char *eol;
+       /* skip past header until we hit empty line */
+       while (*buf && *buf != '\n') {
+               eol = strchrnul(buf, '\n');
+               if (*eol)
+                       eol++;
+               buf = eol;
        }
+       /* skip any empty lines */
        while (*buf == '\n')
                buf++;
-       if (!*buf)
-               return;
-       *sub = buf; /* first non-empty line */
-       buf = strchr(buf, '\n');
-       if (!buf) {
-               *body = "";
-               return; /* no body */
+
+       /* parse signature first; we might not even have a subject line */
+       *sig = buf + parse_signature(buf, strlen(buf));
+       *siglen = strlen(*sig);
+
+       /* subject is first non-empty line */
+       *sub = buf;
+       /* subject goes to first empty line */
+       while (buf < *sig && *buf && *buf != '\n') {
+               eol = strchrnul(buf, '\n');
+               if (*eol)
+                       eol++;
+               buf = eol;
        }
+       *sublen = buf - *sub;
+       /* drop trailing newline, if present */
+       if (*sublen && (*sub)[*sublen - 1] == '\n')
+               *sublen -= 1;
+
+       /* skip any empty lines */
        while (*buf == '\n')
-               buf++; /* skip blank between subject and body */
+               buf++;
        *body = buf;
+       *bodylen = strlen(buf);
+       *nonsiglen = *sig - buf;
 }
 
 /* See grab_values */
 static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz)
 {
        int i;
-       const char *subpos = NULL, *bodypos = NULL;
+       const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
+       unsigned long sublen = 0, bodylen = 0, nonsiglen = 0, siglen = 0;
 
        for (i = 0; i < used_atom_cnt; i++) {
                const char *name = used_atom[i];
@@ -500,17 +533,27 @@ static void grab_sub_body_contents(struct atom_value *val, int deref, struct obj
                        name++;
                if (strcmp(name, "subject") &&
                    strcmp(name, "body") &&
-                   strcmp(name, "contents"))
+                   strcmp(name, "contents") &&
+                   strcmp(name, "contents:subject") &&
+                   strcmp(name, "contents:body") &&
+                   strcmp(name, "contents:signature"))
                        continue;
                if (!subpos)
-                       find_subpos(buf, sz, &subpos, &bodypos);
-               if (!subpos)
-                       return;
+                       find_subpos(buf, sz,
+                                   &subpos, &sublen,
+                                   &bodypos, &bodylen, &nonsiglen,
+                                   &sigpos, &siglen);
 
                if (!strcmp(name, "subject"))
-                       v->s = copy_line(subpos);
+                       v->s = copy_subject(subpos, sublen);
+               else if (!strcmp(name, "contents:subject"))
+                       v->s = copy_subject(subpos, sublen);
                else if (!strcmp(name, "body"))
-                       v->s = xstrdup(bodypos);
+                       v->s = xmemdupz(bodypos, bodylen);
+               else if (!strcmp(name, "contents:body"))
+                       v->s = xmemdupz(bodypos, nonsiglen);
+               else if (!strcmp(name, "contents:signature"))
+                       v->s = xmemdupz(sigpos, siglen);
                else if (!strcmp(name, "contents"))
                        v->s = xstrdup(subpos);
        }