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Source: https://github.com/microsoft/WSL/issues/4852#issuecomment-579616808

Closes #6243

Provides a different solution to #8332 and #8333

Fixes #8614

Closes #4989
Co-authored-by: Marc Cornellà <marc.cornella@live.com>

Use add-zsh-hook to add functions to hooks. That way they won't be added again
when doing `source ~/.zshrc` multiple times.
Co-authored-by: Marc Cornellà <marc.cornella@live.com>

$GIT_STATUS_IGNORE_SUBMODULES can be used to specify handling of
submodules. It can be:
not set : ignore dirty submodules (this was default zsh behavior)
"git"   : do not use "--ignore-submodules" and let git choose,
          this obeys setting in .gitmodules
other   : comes into "--ignore-submodules=$GIT_STATUS_IGNORE_SUBMODULES"

WSL 2 changes the output of `uname -r`. For instance,

  WSL 1: 4.4.0-18980-Microsoft
  WSL 2: 4.19.67-microsoft-standard

Since WSL 2 lowercases the M, we can match for the rest of the string
which remains lowercase throughout both versions. Another option would
be to match for both upper- and lower-case Ms, like that:

  $(uname -r) = *[Mm]icrosoft*

Fixed use of nohup in open_command where it was only necessary for
xdg-open (and actually harmful for cmd.exe in WSL 2). The current logic
is simpler and more future-proof.

Fixes #7942

Tmux must have special handling for /dev/stdin since it's managing the
terminal itself. This was tested with tmux-2.9a on macOS.

This implements essentially the same heuristic as neovim, with the additional
(existing) special support for Cygwin.
See: https://github.com/neovim/neovim/blob/e682d799fa3cf2e80a02d00c6ea874599d58f0e7/runtime/autoload/provider/clipboard.vim#L55-L121
  - pbcopy, pbpaste (macOS)
  - cygwin (Windows running Cygwin)
  - wl-copy, wl-paste (if $WAYLAND_DISPLAY is set)
  - xclip (if $DISPLAY is set)
  - xsel (if $DISPLAY is set)
  - lemonade (for SSH) https://github.com/pocke/lemonade
  - doitclient (for SSH) http://www.chiark.greenend.org.uk/~sgtatham/doit/
  - win32yank (Windows)
  - tmux (if $TMUX is set)

Previously, OS detection would happen on each invocation. This makes it
happen once (unless it fails, in which case it will try again on the
next invocation).

This has the additional benefit of localizing the platform-specific
checks and commands, too, versus spreading them out in separate
functions.

Ideally the parameter would just be removed-users could always
just do "clipcopy < some-file". but removing the parameter would break
backwards compatibility.

In any case, this simplifies the logic considerably.

Fixes #5499
Fixes #5569
Fixes #6338
Fixes #6654
Fixes #6255
Fixes #7632

Closes #7763
Co-authored-by: Daniel Galán y Martins <git@galan.de>

Changes themes displaying RVM or other Ruby version info to use the central
ruby_prompt_info function. This supports more Ruby versioning mechanisms,
reduces copy-and-paste code, and avoids "zsh: no such file or directory: rvm-prompt"
when run on machines that do not have RVM installed.

Changes the prefix/suffix variable names to ZSH_THEME_RUBY_PROMPT_PREFIX and
ZSH_THEME_RUBY_PROMPT_SUFFIX, since they apply to all Ruby versioning mechanisms,
not just RVM.

Allows empty ZSH_THEME_RUBY_PROMPT_PREFIX and ZSH_THEME_RUBY_PROMPT_SUFFIX.

The 1.7.2 release was published in July 2010 [1]. It's about time to stop
supporting older versions.

Fixes #4583

[1] https://github.com/git/git/releases/tag/v1.7.2

A default PS1 doesn't make sense: the user will either choose a theme or not
care about a default prompt since they can set it themselves.

Fixes #7054

Fixes #7527

If a number is passed without explicitly passing `-l`, it will now behave
as if using the history builtin, instead of throwing an error.

Fixes #7117

Fixes #7118

Initializes jenv and provides the jenv_prompt_info funtion to add
Java version information to prompts.  This function is stubbed in
prompt_info_functions script to allow it to be safely called
regardless of whether or not the jenv plugin is loaded.

It also splits detection of the plugin/versions directory and bin directory
to suppport the way Homebrew splits the jenv bin and data directories

Fixes #5835

* use https everywhere

* use https links on the files that are left

Also, removed some broken links and updated redirections.

This reverts commit 9544316e.

This setting broke mouse / touchpad scroll on programs using `less` output
due to it not using the alternate screen buffer.

Fixes #7025

The option '-F' causes 'less' to automatically quit if the contents fit 
the screen and the option '-X' causes 'less' to not clear the screen after 
quit. I think both options are generally useful for terminal applications.

They are in particular useful for Git as it runs all output through a
pager. Git will run 'less' with '-FRX' by default if the environment 
variable $LESS is not defined [1]. Since oh-my-zsh used to set $LESS to 
'-R', Git would not override this setting. Consequently, Git would 
display even a single line of output in a pager and the user would need
to explicitly quit that pager (see mailing list discussion [2]).

Therefore, lets change the oh-my-zsh default value for $LESS to '-FRX'.
This would be useful for oh-my-zsh Git users and likely for users of
other applications that use 'less' too.

[1] https://github.com/git/git/blob/36438dc19dd2a305dddebd44bf7a65f1a220075b/Documentation/config.txt#L819-L821
[2] https://public-inbox.org/git/2412A603-4382-4AF5-97D0-D16D5FAAFE28@eluvio.com/