technomancy/leiningen — Issue #405: `lein upgrade` should allow to specify which exact version to upgrade to
Author: kumarshantanu
Created: 2012-02-15 10:01:26+00:00
State: open
Labels: Enhancement

In some scenarios it may be important to use a specific version of Lein. This can be facilitated by allowing an optional version string on the command line as follows:

```bash
$ lein upgrade [version]
```

Examples:

```bash
$ lein upgrade # works as usual

$ lein upgrade 1.6.2 # upgrades/downgrades to version 1.6.2
```