Class: Capistrano::Deploy::SCM::Git

Inherits:
Base
  • Object
show all
Defined in:
lib/alpha_omega/deploy/scm/git.rb

Overview

An SCM module for using Git as your source control tool with Capistrano 2.0.

Assumes you are using a shared Git repository.

Parts of this plugin borrowed from Scott Chacon’s version, which I found on the Capistrano mailing list but failed to be able to get working.

FEATURES:

* Very simple, only requiring 2 lines in your deploy.rb.
* Can deploy different branches, tags, or any SHA1 easily.
* Supports :scm_command Capistrano directive.

CONFIGURATION

Use this plugin by adding the following line in your config/deploy.rb:

set :scm, :git

Set :repository to the path of your Git repo:

set :repository, "someuser@somehost:/home/myproject"

The above two options are required to be set, the ones below are optional.

You may set :branch, which is the reference to the branch, tag, or any SHA1 you are deploying, for example:

set :branch, "master"

Otherwise, HEAD is assumed. I strongly suggest you set this. HEAD is not always the best assumption.

The :scm_command configuration variable, if specified, will be used as the full path to the git executable on the remote machine:

set :scm_command, "/opt/local/bin/git"

AUTHORS

Garry Dolley scie.nti.st Contributions by Geoffrey Grosenbach topfunky.com

Scott Chacon http://jointheconversation.org
            Alex Arnell http://twologic.com
                     and Phillip Goldenburg

Instance Attribute Summary

Attributes inherited from Base

#configuration

Instance Method Summary collapse

Methods inherited from Base

#command, default_command, #initialize, #local, #local?, #next_revision, #scm

Constructor Details

This class inherits a constructor from Capistrano::Deploy::SCM::Base

Instance Method Details

#checkout(revision, destination) ⇒ Object

Performs a clone on the remote machine, then checkout on the branch you want to deploy.



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# File 'lib/alpha_omega/deploy/scm/git.rb', line 72

def checkout(revision, destination)
  git = command

  execute = []

  execute << "[[ -d #{destination}/.git ]] || #{git} clone #{verbose} #{variable(:repository)} #{destination}"
  execute << "cd #{destination} && #{git} fetch -q && #{git} checkout -q --force #{revision}"
  execute << "cd #{destination} && #{git} reset --hard #{revision} && #{git} submodule update --init --recursive"

  execute
end

#diff(from, to = nil) ⇒ Object

Returns a string of diffs between two revisions



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# File 'lib/alpha_omega/deploy/scm/git.rb', line 85

def diff(from, to=nil)
  from << "..#{to}" if to
  scm :diff, from
end

#head ⇒ Object

When referencing “head”, use the branch we want to deploy or, by default, Git’s reference of HEAD (the latest changeset in the default branch, usually called “master”).



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# File 'lib/alpha_omega/deploy/scm/git.rb', line 66

def head
  variable(:branch) || 'HEAD'
end

#log(from, to = nil) ⇒ Object

Returns a log of changes between the two revisions (inclusive).



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# File 'lib/alpha_omega/deploy/scm/git.rb', line 91

def log(from, to=nil)
  scm :log, "#{from}..#{to}"
end

#query_revision(revision) ⇒ Object

Getting the actual commit id, in case we were passed a tag or partial sha or something - it will return the sha if you pass a sha, too

Raises:

  • (ArgumentError) 


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# File 'lib/alpha_omega/deploy/scm/git.rb', line 97

def query_revision(revision)
  raise ArgumentError, "Deploying remote branches is no longer supported.  Specify the remote branch as a local branch for the git repository you're deploying from (ie: '#{revision.gsub('origin/', '')}' rather than '#{revision}')." if revision =~ /^origin\//
  return revision if revision =~ /^[0-9a-f]{40}$/
  command = scm('ls-remote', repository, revision)
  result = yield(command)
  revdata = result.split(/[\t\n]/)
  newrev = nil
  revdata.each_slice(2) do |refs|
    rev, ref = *refs
    if ref.sub(/refs\/.*?\//, '').strip == revision.to_s
      newrev = rev
      break
    end
  end
  raise "Unable to resolve revision for '#{revision}' on repository '#{repository}'." unless newrev =~ /^[0-9a-f]{40}$/
  return newrev
end