In homebrewed environment, avoid using `brew --prefix nvm` which is
ruby based and is super slow. Instead, rely on homebrew standard
behavior wherein all installed packages are available in canonical
path $(brew --prefix)/opt/<package> (for nvm it would obviously be
`$(brew --prefix)/opt/nvm`).
NB: `$(brew --prefix)` (without additional argument) is a simple shell
shortcut and doesn't have the same performance impact.
While mangling cached completion file, we cannot just assume that
`$pip_command` would resolve to `pip` -- it might be `pip2` or `pip3`
depending on the relative position in zsh `$commands` array. Thus
replace the whole of 'pip*' with 'pip pip2 pip3' for compctl assignment.
As is the convention in prezto, we cache the command-not-found handler to
avoid incurring the performance penalty of loading ruby interpreter on
every call. This restores the 'Homebrew way' of loading command-not-found
handler.
Further, the formally recommended command lookup mechanism in Homebrew
(viz., `brew command command-not-found-init`) is ruby based and is super
slow. To avoid performance penalty, we `find` it ourselves from
`TAP_DIRECTORY` defined internally in Homebrew.
This also reinstates support for custom taps or non-standard Homebrew location.
- Add missing documentation for options and environment variables
- Rearrange definition and documentation of 'Options', 'Variables'
and 'Aliases' in a consistent order
For the submodules that have some kind of release (tags), they were
updated up to the most recent release. Otherwise, the submodule was
updated to the latest commit.
Homebrew has deprecated `brew cask cleanup` and `brew cask search` in favor
of `brew cleanup` and `brew search` respectively. They will stop working on
2018-09-30. Further, `--outdated` has been removed.
We should eventually remove the related aliases, but for a while we keep
supporting them gracefully with deprecation warning.
The documentation has been removed from README.md, however.
This updates the submodules for autosuggestions, completion,
syntax-highlighting and the prompts async, powerlevel9k and pure.
All submodules that have TAGs/Releases were updated to their latest
TAG/release, except for syntax-highlighting because it's latest
release/TAG is from more than one year ago, and the project seems to be
well maintained but without releases.
After profiling startup time, I found that "pyenv rehash" is
by far the slowest piece. This change skips rehashing on init.
See https://github.com/pyenv/pyenv/issues/784#issuecomment-404850327
Also pass the shell explicitly, as suggested in
https://github.com/pyenv/pyenv/issues/784#issuecomment-404944318,
which provides a modest improvement.
In total, this improves startup time from 1s to 0.3s on my machine.
Using the following command:
python -m timeit "__import__('subprocess').Popen(['zsh', '-i', '-c', 'echo']).communicate()"
Result before this change:
10 loops, best of 3: 1 sec per loop
Result after this change:
10 loops, best of 3: 334 msec per loop
