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* The check for the asdf installation directory is more precise:

    The existence of the directory `$HOME/.asdf` does not mean that it is the installation
    directory of `asdf`. It will also be created after installing at least one asdf plugin.

* Completions, while installed with homebrew, are now expected on an alternative location.

This change references `$RANDOM` outside the subshell to refresh it for the
next subshell invocation. Otherwise, subsequent runs of the function get the
same value and, if run simultaneously, they may clobber each others' temp .z
files.

This is due to how zsh distributes RANDOM values when running inside a
subshell:

  subshells that reference RANDOM will result in identical pseudo-random
  values unless the value of RANDOM is referenced or seeded in the parent
  shell in between subshell invocations

See: http://zsh.sourceforge.net/Doc/Release/Parameters.html#index-RANDOM

Fixes #7562

Fixes (probably MacOS) issue:
> ggfl
zsh: command not found: ggfl

recent `brew install jenv` installs to `/usr/local/bin/jenv`, auto-discover it for recent brew installs to avoid secondary, slower search

This change makes the plugin check if an identity is loaded by looking
first at the key filename reported by `ssh-add -l`. This fixes the use
case where ssh-keygen is not able to output the fingerprint of a key,
such as the one reported on #7516.

Now, for an identity to be passed onto ssh-add, it has to fail the
match for a loaded identity, both filename and signature.

With this PR the ssh-agent plugin loads all identities which are not yet
loaded in a single call to ssh-add. If a passphrase is shared between
loaded identities it only needs to be entered once.

Fixes #7506

Use fingerprint of ssh key instead of file name to control if the key is already loaded.

Also check for .ssh folder presence (#5128)

With this PR the ssh-agent plugin checks the `ssh-add -l` output for the
identities added, and adds all those specified by the user that haven't been
added yet.

We also decouple the logic of starting ssh-agent from the logic of adding
identities, meaning that even if ssh-agent has been started by some other means
(like launchd) we can still ssh-add the user's identities.

Fixes #3019
Fixes #6979

Before, when typing the `marks` command, longer mark keys would cause
the tabs to spill over to the next tab stop, like so:

    rc      -> /home/ahlex/.rc
    repos   -> /home/ahlex/repos
    a-longer-string         -> /tmp

Implement better key display by running through all of the marks twice,
once to get the longest key length, and the second time to format
everything according to that length:

                 rc -> /home/ahlex/.rc
              repos -> /home/ahlex/repos
    a-longer-string -> /tmp

Including a Kubernetes Service Catalog plugin 

* vagrant: Add `cloud` subcommand to completion

* vagrant: Add `port` subcommand to completion

* vagrant: Add `validate` subcommand to completion

See https://github.com/robbyrussell/oh-my-zsh/issues/7407#issuecomment-441665143

Signed-off-by: Ricardo Seriani <ricardo.seriani@gmail.com>

Fixes #7405

Fixes #7407

FreeBSD's tput needs termcap codes instead of terminfo capnames, so using `tput colors`
has the wrong effect. See #7407

This reverts commit 05b61706.