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#!/usr/bin/env ruby
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require 'fileutils'
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# Set this to where you want to keep your environments
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ENVIRONMENT_BASEDIR = "<%= scope.lookupvar("puppet::server::envs_dir") %>"
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# post-receive hooks set GIT_DIR to the current repository. If you want to
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# clone from a non-local repository, set this to the URL of the repository,
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# such as git@git.host:puppet.git
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SOURCE_REPOSITORY = File.expand_path(ENV['GIT_DIR'])
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# Mapping of branches to directories. In many cases, the master branch is
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# checked out to the 'development' environment.
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BRANCH_MAP = {
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# This will clone/pull the master branch into the development puppet environment
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# "master" => "development",
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}
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# The git_dir environment variable will override the --git-dir, so we remove it
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# to allow us to create new directories cleanly.
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ENV.delete('GIT_DIR')
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# Ensure that we have the underlying directories, otherwise the later commands
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# may fail in somewhat cryptic manners.
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unless File.directory? ENVIRONMENT_BASEDIR
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puts %Q{#{ENVIRONMENT_BASEDIR} does not exist, cannot create environment directories.}
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exit 1
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end
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# You can push multiple refspecs at once, like 'git push origin branch1 branch2',
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# so we need to handle each one.
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$stdin.each_line do |line|
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oldrev, newrev, refname = line.split(" ")
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# Determine the branch name from the refspec we're received, which is in the
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# format refs/heads/<branch>, and make sure that it doesn't have any possibly
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# dangerous characters
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branchname = refname.sub(%r{^refs/heads/(.*$)}) { $1 }
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if branchname =~ /[\W]/
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puts %Q{Branch "#{branchname}" contains non-word characters, ignoring it.}
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next
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end
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if BRANCH_MAP[branchname] != nil
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environment_name = BRANCH_MAP[branchname]
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environment_path = "#{ENVIRONMENT_BASEDIR}/#{BRANCH_MAP[branchname]}"
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else
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environment_name = branchname
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environment_path = "#{ENVIRONMENT_BASEDIR}/#{branchname}"
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end
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if newrev =~ /^0+$/
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# We've received a push with a null revision, something like 000000000000,
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# which means that we should delete the given branch.
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puts "Deleting existing environment #{environment_name}"
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if File.directory? environment_path
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FileUtils.rm_rf environment_path, :secure => true
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end
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else
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# We have been given a branch that needs to be created or updated. If the
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# environment exists, update it. Else, create it.
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if File.directory? environment_path
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# Update an existing environment. We do a fetch and then reset in the
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# case that someone did a force push to a branch.
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puts "Updating existing environment #{environment_name}"
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Dir.chdir environment_path
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%x{git fetch --all}
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%x{git reset --hard "origin/#{branchname}"}
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if File.exists? "#{environment_path}/.gitmodules"
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# ensure that we remove deleted sub modules too
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%x{git status --short}.split("\n").each do |file|
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# ?? old_submodule/
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if file =~ /\s*\?{2}\s*(\S*)/
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puts "Found a few unknown files.. deleting #{$1}"
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FileUtils.rm_rf $1, :secure => true
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end
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end
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%x{git submodule update --init --recursive}
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end
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else
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# Instantiate a new environment from the current repository.
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puts "Creating new environment #{environment_name}"
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%x{git clone --recursive #{SOURCE_REPOSITORY} #{environment_path} --branch #{branchname}}
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end
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end
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end
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