create project

.gitignore

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+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in capistrano-pyenv.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2012 Yamashita Yuu
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# capistrano-pyenv
+
+a capistrano recipe to manage pythons with [pyenv](https://github.com/yyuu/pyenv).
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 'capistrano-pyenv'
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install capistrano-pyenv
+
+## Usage
+
+This recipe will install [pyenv](https://github.com/yyuu/pyenv) during `deploy:setup` task.
+
+To setup pyenv for your application, add following in you `config/deploy.rb`.
+
+    # in "config/deploy.rb"
+    require 'capistrano-pyenv'
+
+Following options are available to manage your pyenv.
+
+ * `:pyenv_branch` - the git branch to install `pyenv` from. use `master` by default.
+ * `:pyenv_cmd` - the `pyenv` command.
+ * `:pyenv_path` - the path where `pyenv` will be installed. use `$HOME/.pyenv` by default.
+ * `:pyenv_plugins_options` - install options for pyenv plugins.
+ * `:pyenv_plugins` - pyenv plugins to install. do nothing by default.
+ * `:pyenv_repository` - repository URL of pyenv.
+ * `:pyenv_python_dependencies` - depedency packages.
+ * `:pyenv_python_version` - the python version to install. install `2.7.3` by default.
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Added some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request
+
+## Author
+
+- YAMASHITA Yuu (https://github.com/yyuu)
+- Geisha Tokyo Entertainment Inc. (http://www.geishatokyo.com/)
+
+## License
+
+MIT

Rakefile

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+require "bundler/gem_tasks"

capistrano-pyenv.gemspec

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+# -*- encoding: utf-8 -*-
+require File.expand_path('../lib/capistrano-pyenv/version', __FILE__)
+
+Gem::Specification.new do |gem|
+  gem.authors       = ["Yamashita Yuu"]
+  gem.email         = ["yamashita@geishatokyo.com"]
+  gem.description   = %q{a capistrano recipe to manage pythons with pyenv.}
+  gem.summary       = %q{a capistrano recipe to manage pythons with pyenv.}
+  gem.homepage      = "https://github.com/yyuu/capistrano-pyenv"
+
+  gem.files         = `git ls-files`.split($\)
+  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
+  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
+  gem.name          = "capistrano-pyenv"
+  gem.require_paths = ["lib"]
+  gem.version       = Capistrano::PyEnv::VERSION
+
+  gem.add_dependency("capistrano")
+end

lib/capistrano-pyenv.rb

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+require "capistrano-pyenv/deploy"
+require "capistrano-pyenv/version"
+
+module Capistrano
+  module Pyenv
+    # Your code goes here...
+  end
+end

lib/capistrano-pyenv/deploy.rb

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+module Capistrano
+  module PyEnv
+    def self.extended(configuration)
+      configuration.load {
+        namespace(:pyenv) {
+          _cset(:pyenv_path) {
+            capture("echo $HOME/.pyenv").chomp()
+          }
+          _cset(:pyenv_bin) {
+            File.join(pyenv_path, 'bin', 'pyenv')
+          }
+          _cset(:pyenv_cmd) { # to use custom pyenv_path, we use `env` instead of cap's default_environment.
+            path = "#{pyenv_path}/bin:#{pyenv_path}/shims:$PATH"
+            "env PATH=#{path.dump()} #{pyenv_bin}"
+          }
+          _cset(:pyenv_repository, 'git://github.com/yyuu/pyenv.git')
+          _cset(:pyenv_branch, 'master')
+
+          _cset(:pyenv_plugins, {})
+          _cset(:pyenv_plugins_options, {})
+          _cset(:pyenv_plugins_path) {
+            File.join(pyenv_path, 'plugins')
+          }
+
+          _cset(:pyenv_git) {
+            if scm == :git
+              if fetch(:scm_command, :default) == :default
+                fetch(:git, 'git')
+              else
+                scm_command
+              end
+            else
+              fetch(:git, 'git')
+            end
+          }
+
+          _cset(:pyenv_python_version, '2.7.3')
+          _cset(:pyenv_python_dependencies, %w(build-essential libreadline6-dev zlib1g-dev libssl-dev))
+
+          desc("Setup pyenv.")
+          task(:setup, :except => { :no_release => true }) {
+            dependencies
+            update
+            configure
+            build
+          }
+          after 'deploy:setup', 'pyenv:setup'
+
+          def _pyenv_sync(repository, destination, revision)
+            git = pyenv_git
+            remote = 'origin'
+            verbose = "-q"
+            run((<<-E).gsub(/\s+/, ' '))
+              if test -d #{destination}; then
+                cd #{destination} && #{git} fetch #{verbose} #{remote} && #{git} fetch --tags #{verbose} #{remote} && #{git} merge #{verbose} #{remote}/#{revision};
+              else
+                #{git} clone #{verbose} #{repository} #{destination} && cd #{destination} && #{git} checkout #{verbose} #{revision};
+              fi;
+            E
+          end
+
+          desc("Update pyenv installation.")
+          task(:update, :except => { :no_release => true }) {
+            _pyenv_sync(pyenv_repository, pyenv_path, pyenv_branch)
+            plugins.update
+          }
+
+          desc("Purge pyenv.")
+          task(:purge, :except => { :no_release => true }) {
+            run("rm -rf #{pyenv_path}")
+          }
+
+          namespace(:plugins) {
+            desc("Update pyenv plugins.")
+            task(:update, :except => { :no_release => true }) {
+              pyenv_plugins.each { |name, repository|
+                options = ( pyenv_plugins_options[name] || {})
+                branch = ( options[:branch] || 'master' )
+                _pyenv_sync(repository, File.join(pyenv_plugins_path, name), branch)
+              }
+            }
+          }
+
+          task(:configure, :except => { :no_release => true }) {
+            # nop
+          }
+
+          task(:dependencies, :except => { :no_release => true }) {
+            unless pyenv_python_dependencies.empty? # dpkg-query is faster than apt-get on querying if packages are installed
+              run("dpkg-query --show #{pyenv_python_dependencies.join(' ')} 2>/dev/null || #{sudo} apt-get -y install #{pyenv_python_dependencies.join(' ')}")
+            end
+          }
+
+          desc("Build python within pyenv.")
+          task(:build, :except => { :no_release => true }) {
+            python = fetch(:pyenv_python_cmd, 'python')
+            run("#{pyenv_cmd} whence #{python} | grep -q #{pyenv_python_version} || #{pyenv_cmd} install #{pyenv_python_version}")
+            run("#{pyenv_cmd} global #{pyenv_python_version} && #{pyenv_cmd} exec #{python} --version")
+          }
+        }
+      }
+    end
+  end
+end
+
+if Capistrano::Configuration.instance
+  Capistrano::Configuration.instance.extend(Capistrano::PyEnv)
+end
+
+# vim:set ft=ruby ts=2 sw=2 :

lib/capistrano-pyenv/version.rb

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+module Capistrano
+  module PyEnv
+    VERSION = "0.0.1git"
+  end
+end