gbpm (<generic binary> path mangler)

https://git.potato.am/gbpm.git/
Manage multiple Python/Ruby/etc. installations with no black magic.


NOTES

  gbpm only manages installations located in GBPM_OPTS_PATH, shadowing
  binaries already reachable from PATH. No information on external
  installations is displayed.

  A substring match is performed when selecting an installation, with
  tiebreak rules to choose intuitively, the greatest being selected
  amongst equally ranked matches. For example, `2.1' will match
  `python-2.1.3' over `python-2.1.2' or `python-3.2.1'.


DEPENDENCIES

  bash (>= 4.0)
  coreutils (sort)


INSTALLING

  The output of this script is a series of commands to be executed, e.g.
  via a shell function in `~/.bashrc':

      pypm() {
          . <(
              GBPM_OPTS_PATH="${HOME}/.pythons" \
              /path/to/gbpm.sh "${@}")
      }

      rbpm() {
          . <(
              GBPM_OPTS_PATH="${HOME}/.rubies" \
              /path/to/gbpm.sh "${@}")
      }


INSTALLING VERSIONS

  With `~/.rubies' as the managed directory, the path to a ruby binary
  should look something like:

      ~/.rubies/ruby-2.1.2/bin/ruby

  To install Ruby to this directory:

      $ wget https://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.2.tar.bz2
      $ tar -xf ruby-2.1.2.tar.bz2
      $ cd ruby-2.1.2
      $ ./configure --prefix="${HOME}"/.rubies/ruby-2.1.2
      $ make
      $ make install


USAGE

  A series of commands showing gbpm in use, through an `rbpm' function:

      $ ruby -v
      bash: ruby: command not found

      $ rbpm ls
        ruby-1.8.7-p374
        ruby-1.9.3-p547
        ruby-2.1.2

      $ rbpm set 2.1
      adding /home/david/.rubies/ruby-2.1.2/bin to PATH

      $ rbpm ls
        ruby-1.8.7-p374
        ruby-1.9.3-p547
      * ruby-2.1.2

      $ ruby -v
      ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]

      $ rbpm set 1.9
      removing /home/david/.rubies/ruby-2.1.2/bin from PATH
      adding /home/david/.rubies/ruby-1.9.3-p547/bin to PATH

      $ ruby -v
      ruby 1.9.3p547 (2014-05-14 revision 45962) [x86_64-linux]

      $ rbpm clear
      removing /home/david/.rubies/ruby-1.9.3-p547/bin from PATH

      $ ruby -v
      bash: ruby: command not found

  To set the version from a .ruby-version file:

      $ rbpm set $(cat .ruby-version)
      adding /home/david/.rubies/ruby-1.8.7-p374/bin to PATH


AUTHORS

  David Vazgenovich Shakaryan


LICENSE

  Distributed under the terms of the MIT License.
  See included COPYING file for the full license text.


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