Homebrew places the rbenv executable in a location such as
`/usr/local/bin/rbenv`, which is in PATH. However, that is a symlink to
`/usr/local/Cellar/rbenv/<VERSION>/bin/rbenv`, which is itself a symlink to
`/usr/local/Cellar/rbenv/<VERSION>/libexec/rbenv`. Upon executing, rbenv
will add its own directory to PATH so that it can easily invoke its
subcommands.
When generating shims during `rbenv rehash`, rbenv will try to put the
absolute path to itself inside each shim so that shims would work even
if rbenv itself isn't in PATH. Under Homebrew, rbenv's directory will be
the versioned directory in Homebrew's Cellar. However, due to Homebrew's
auto-cleanup functionality, shims generated this way will be broken
after upgrading rbenv because of the versioned Cellar path.
This changes how rbenv discovers itself in PATH: it will look at the
original PATH, not in the one modified by rbenv, with the intention of
excluding results under rbenv's own `libexec/`. If rbenv wasn't found in
PATH, return the absolute path to rbenv's own `bin/rbenv`.
Useful in combination with `--bare` to list just the unique version
numbers without the extra directory entries that are symlinks to other
version numbers in the same directory.
It doesn't need to be a bash array and we don't need a separate index of
shims registered. Simply keep everything in a space-separated string and
use that as an index as well.
This assumes that executable names *never* have spaces in them.
On my system that has 25 versions under rbenv, this speeds up rehash
almost 3-fold:
- before: 391 ms
- after: 134 ms
This is achieved by removing duplicate names of executables before
registering them as shims. Since most Rubies will share a lot of the
same executable names ("ruby", "rake", "bundle", ...), this is a
considerable reduction in number of shims registered.
It was supposed to fix shelling out to Ruby but it in fact broke another
kind of shelling out to Ruby: invoking the `ruby` binary directly with
the `-S` flag.
Fixes#480
This reverts commit db143bb654.
Enables shelling out from a ruby process started with rbenv to a ruby
process with a different RBENV_VERSION. Fixes#121
This removes the workaround created for #15 and solves `ruby -S` support
by setting RUBYPATH. PATH is never changed.
To illustrate how RUBYPATH changes in various configurations:
PATH=~/bin:~/.rbenv/shims:/usr/bin:/bin
RBENV_VERSION=1.8 ruby -S rake
#=> executes ~/.rbenv/versions/1.8/bin/rake
#=> RUBYPATH=~/bin:~/.rbenv/versions/1.8/bin:/usr/bin:/bin
RBENV_VERSION=2.0 ruby -S rake
#=> executes ~/.rbenv/versions/2.0/bin/rake
#=> RUBYPATH=~/bin:~/.rbenv/versions/2.0/bin:/usr/bin:/bin
RBENV_VERSION=system ruby -S rake
#=> executes /usr/bin/rake
#=> RUBYPATH=~/bin:/rbenv_shims_were_here:/usr/bin:/bin
RBENV_VERSION=1.8 ruby -S rake
#=> executes ~/.rbenv/versions/1.8/bin/rake
#=> RUBYPATH=~/bin:~/.rbenv/versions/1.8/bin:/usr/bin:/bin
A command doesn't have to specify Usage docs if it doesn't accept any
arguments. The default usage for a command will be printed as:
Usage: rbenv ${command}
Docs are comprised from "Usage", "Summary" and "Help" sections, where
"Help" can span multiple commented lines. If it is missing, "Summary" is
shown in its place.
References #204, references #206
$OLDPWD is a standard shell variable that contains the previous working
directory as set by the "cd" command. No need to save $PWD to some
custom variable.
(We could also have used "cd -" but it prints out $OLDPWD too.)
A trap on the special signal EXIT is executed before the shell
terminates. EXIT actually covers SIGINT and SIGTERM as well, and
we don't need any extra traps for them.
See bash(1) and "help trap" in bash.
