Re: [PATCH] revisions: add @{default} shorthand for default branch

[Harald Nordgren <haraldnordgren@gmail.com>]

> Doesn't repo_default_branch_name() do the right thing without being
> noisy at all even in a repository without that configured, as the
> function will fall back to the built-in default?  While I do not
> think of a workflow in which a handy access to the value the
> function gives would be so useful that it deserves a short-hand, it
> would be a reasonable candidate of what to be called "@{default}",
> if it proves useful, I would think.

After looking a this, this is hard-coded. Not showing what is relevant for
each repo that exists:

```
char *repo_default_branch_name(struct repository *r, int quiet)
{
  const char *config_key = "init.defaultbranch";
  const char *config_display_key = "init.defaultBranch";
  char *ret = NULL, *full_ref;
  const char *env = getenv("GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME");

  if (env && *env)
    ret = xstrdup(env);
  if (!ret && repo_config_get_string(r, config_key, &ret) < 0)
    die(_("could not retrieve `%s`"), config_display_key);

  if (!ret) {
#ifdef WITH_BREAKING_CHANGES
    ret = xstrdup("main");
#else
    ret = xstrdup("master");
```


Harald