push: support pushing HEAD to real branch name

diff --git a/merge-recursive.c b/merge-recursive.c
index 97dcf9bf02d8f382ba63cfeef9d6dcb792c62f76..9a1e2f269dc5eff3b7544507a1e483948cc1254d 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -85,12 +85,6 @@ struct stage_data
        unsigned processed:1;
 };
 
-struct output_buffer
-{
-       struct output_buffer *next;
-       char *str;
-};
-
 static struct path_list current_file_set = {NULL, 0, 0, 1};
 static struct path_list current_directory_set = {NULL, 0, 0, 1};
 
@@ -98,51 +92,52 @@ static int call_depth = 0;
 static int verbosity = 2;
 static int rename_limit = -1;
 static int buffer_output = 1;
-static struct output_buffer *output_list, *output_end;
+static struct strbuf obuf = STRBUF_INIT;
 
-static int show (int v)
+static int show(int v)
 {
        return (!call_depth && verbosity >= v) || verbosity >= 5;
 }
 
-static void output(int v, const char *fmt, ...)
+static void flush_output(void)
 {
-       va_list args;
-       va_start(args, fmt);
-       if (buffer_output && show(v)) {
-               struct output_buffer *b = xmalloc(sizeof(*b));
-               nfvasprintf(&b->str, fmt, args);
-               b->next = NULL;
-               if (output_end)
-                       output_end->next = b;
-               else
-                       output_list = b;
-               output_end = b;
-       } else if (show(v)) {
-               int i;
-               for (i = call_depth; i--;)
-                       fputs("  ", stdout);
-               vfprintf(stdout, fmt, args);
-               fputc('\n', stdout);
+       if (obuf.len) {
+               fputs(obuf.buf, stdout);
+               strbuf_reset(&obuf);
        }
-       va_end(args);
 }
 
-static void flush_output(void)
+static void output(int v, const char *fmt, ...)
 {
-       struct output_buffer *b, *n;
-       for (b = output_list; b; b = n) {
-               int i;
-               for (i = call_depth; i--;)
-                       fputs("  ", stdout);
-               fputs(b->str, stdout);
-               fputc('\n', stdout);
-               n = b->next;
-               free(b->str);
-               free(b);
+       int len;
+       va_list ap;
+
+       if (!show(v))
+               return;
+
+       strbuf_grow(&obuf, call_depth * 2 + 2);
+       memset(obuf.buf + obuf.len, ' ', call_depth * 2);
+       strbuf_setlen(&obuf, obuf.len + call_depth * 2);
+
+       va_start(ap, fmt);
+       len = vsnprintf(obuf.buf + obuf.len, strbuf_avail(&obuf), fmt, ap);
+       va_end(ap);
+
+       if (len < 0)
+               len = 0;
+       if (len >= strbuf_avail(&obuf)) {
+               strbuf_grow(&obuf, len + 2);
+               va_start(ap, fmt);
+               len = vsnprintf(obuf.buf + obuf.len, strbuf_avail(&obuf), fmt, ap);
+               va_end(ap);
+               if (len >= strbuf_avail(&obuf)) {
+                       die("this should not happen, your snprintf is broken");
+               }
        }
-       output_list = NULL;
-       output_end = NULL;
+       strbuf_setlen(&obuf, obuf.len + len);
+       strbuf_add(&obuf, "\n", 1);
+       if (!buffer_output)
+               flush_output();
 }
 
 static void output_commit_title(struct commit *commit)
@@ -371,7 +366,7 @@ static struct path_list *get_renames(struct tree *tree,
 
        renames = xcalloc(1, sizeof(struct path_list));
        diff_setup(&opts);
-       opts.recursive = 1;
+       DIFF_OPT_SET(&opts, RECURSIVE);
        opts.detect_rename = DIFF_DETECT_RENAME;
        opts.rename_limit = rename_limit;
        opts.output_format = DIFF_FORMAT_NO_OUTPUT;
@@ -434,19 +429,15 @@ static int update_stages(const char *path, struct diff_filespec *o,
 
 static int remove_path(const char *name)
 {
-       int ret, len;
+       int ret;
        char *slash, *dirs;
 
        ret = unlink(name);
        if (ret)
                return ret;
-       len = strlen(name);
-       dirs = xmalloc(len+1);
-       memcpy(dirs, name, len);
-       dirs[len] = '\0';
+       dirs = xstrdup(name);
        while ((slash = strrchr(name, '/'))) {
                *slash = '\0';
-               len = slash - name;
                if (rmdir(name) != 0)
                        break;
        }
@@ -580,9 +571,7 @@ static void update_file_flags(const unsigned char *sha,
                        flush_buffer(fd, buf, size);
                        close(fd);
                } else if (S_ISLNK(mode)) {
-                       char *lnk = xmalloc(size + 1);
-                       memcpy(lnk, buf, size);
-                       lnk[size] = '\0';
+                       char *lnk = xmemdupz(buf, size);
                        mkdir_p(path, 0777);
                        unlink(path);
                        symlink(lnk, path);
@@ -874,14 +863,9 @@ static int read_merge_config(const char *var, const char *value)
                if (!strncmp(fn->name, name, namelen) && !fn->name[namelen])
                        break;
        if (!fn) {
-               char *namebuf;
                fn = xcalloc(1, sizeof(struct ll_merge_driver));
-               namebuf = xmalloc(namelen + 1);
-               memcpy(namebuf, name, namelen);
-               namebuf[namelen] = 0;
-               fn->name = namebuf;
+               fn->name = xmemdupz(name, namelen);
                fn->fn = ll_ext_merge;
-               fn->next = NULL;
                *ll_user_merge_tail = fn;
                ll_user_merge_tail = &(fn->next);
        }
@@ -1588,7 +1572,7 @@ static int merge(struct commit *h1,
 {
        struct commit_list *iter;
        struct commit *merged_common_ancestors;
-       struct tree *mrtree;
+       struct tree *mrtree = mrtree;
        int clean;
 
        if (show(4)) {